WO2013177844A1 - A suspension damper assembly - Google Patents
A suspension damper assembly Download PDFInfo
- Publication number
- WO2013177844A1 WO2013177844A1 PCT/CN2012/078182 CN2012078182W WO2013177844A1 WO 2013177844 A1 WO2013177844 A1 WO 2013177844A1 CN 2012078182 W CN2012078182 W CN 2012078182W WO 2013177844 A1 WO2013177844 A1 WO 2013177844A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall
- inner tube
- tube
- diaphragm
- outer tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
- F16F9/092—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall comprising a gas spring with a flexible wall provided between the tubes of a bitubular damper
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/062—Bi-tubular units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
- F16F9/067—Partitions of the piston type, e.g. sliding pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
- F16F9/081—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall being of the fluid displacement type, i.e. the piston not comprising damping arrangements
Definitions
- the present invention relates generally to a suspension damper assembly for use in an automotive shock absorber and a method for assembling the suspension damper.
- a suspension damper of the type to which the subject invention pertains is illustrated in U.S. Pat. App. No. 2003/0019701 filed by Hodgson wherein an outer tube of cylindrical shape defines an outer tube inner wall and an outer tube outer wall and the outer tube extends concentrically about a center axis between an open end and a closed end.
- An inner tube of cylindrical shape defines an inner tube inner wall and an inner tube outer wall, the inner tube being disposed concentrically about the center axis and within the outer tube along the center axis between a first end and a second end.
- An annular flange disposed on the open end of the outer tube extends radially inwardly toward and perpendicular to the center axis to define an opening to the inner tube at the first end thereof.
- the application further discloses the inner tube inner wall being spaced radially from the center axis to define a hydraulic chamber of cylindrical shape, and the inner tube outer wall being spaced radially from the outer tube inner wall to define a diaphragm chamber of cylindrical shape between the inner tube outer wall and the outer tube inner wall.
- a diaphragm of cylindrical shape is disposed concentrically between the inner tube outer wall and the outer tube inner wall along the center axis to divide the diaphragm chamber into a high pressure gas chamber disposed between the diaphragm and the inner tube outer wall and a fluid chamber disposed between the diaphragm and the outer tube inner wall.
- a gas charge seal is disposed annularly in the high pressure gas chamber to engage the inner tube outer wall and the outer tube inner wall at the second end of the inner tube.
- the application further discloses a cap engaging the closed end of the outer tube to seal the closed end and an inner tube base of cylindrical shape defines an outer periphery disposed in the first end of the inner tube to engage the cap at the closed end of the outer tube.
- the inner tube base defines a central cavity of hollow cylindrical shape disposed concentrically in the inner tube base and open to the hydraulic chamber and closed by the cap.
- the inner tube base further defines a plurality of radially disposed channels extending perpendicular to the center axis between the central cavity and the fluid chamber for establishing fluid communication between the hydraulic chamber and the fluid chamber.
- the application further discloses a piston disposed in sliding and sealing engagement with the inner tube inner wall in the hydraulic chamber, a rod guide of cylindrical shape defining an axial bore is disposed in the open end and in sealing engagement with the inner tube inner wall, and a piston rod extends along the center axis and through the bore in the rod guide and connects to the piston for movement therewith.
- the U.S. Patent No. 7,226,045 to Brookes discloses an inner clamp of annular shape holding the diaphragm radially inwardly into sealing engagement with the inner tube outer wall.
- the U.S. Pat. No. 4,392,293 to Yamaguchi et al. discloses a method of assembly of a diaphragm apparatus comprising the steps of disposing one end of the diaphragm over the first end of the inner tube, sealing the diaphragm to the inner tube outer wall adjacent the first end thereof to define an inner seal, rolling the diaphragm over the inner seal and towards the second end of the inner tube, and finally inserting the inner tube and the diaphragm into the open end of the outer tube.
- the subject invention provides such an assembly wherein the diaphragm extends from under the inner clamp and through a 'LP shaped turn back toward the open end along outer tube inner wall and an upper clamp of annular shape holds the diaphragm into the outer tube inner wall to seal the diaphragm to the outer tube inner wall.
- the invention also provides a method of assembling such a damper by sealing the diaphragm to the outer tube inner wall adjacent to the second end of the inner tube.
- the subject invention provides for a damper assembly having improved packaging and without any remote reservoir. Additionally, the high pressure gas chamber can be filled after the damper apparatus has been assembled.
- FIG. 1 is a front elevational view showing the suspension damper assembly of the subject invention
- FIG. 2 is a cross- sectional top view of the suspension damper assembly of the subject invention along line 2—2;
- FIG. 3 is a top cross-sectional view of the gas charge seal.
- FIGS. 1 and 2 a suspension damper assembly for an automotive shock absorber constructed in accordance with the subject invention is shown generally in FIGS. 1 and 2.
- a suspension damper for an automotive shock absorber includes an outer tube 20 generally having a cylindrical shape defining an outer tube inner wall 22 and an outer tube outer wall 24.
- the outer tube 20 extends concentrically about a center axis A between an open end 26 and a closed end 28.
- An inner tube 30 generally having a cylindrical shape defining an inner tube inner wall 32 and an inner tube outer wall 34 is disposed concentrically inside the outer tube 20 along the center axis A between a first end 36 and a second end 38.
- the outer tube 20 has an annular flange 40 disposed on the open end 26, and the annular flange 40 extends radially inwardly toward and perpendicular to the center axis A to define an opening to the inner tube 30 at the first end 36 thereof.
- the inner tube inner wall 32 is spaced radially from the center axis A defining a hydraulic chamber 42 generally having a cylindrical shape.
- the inner tube outer wall 34 is spaced radially from the outer tube inner wall 22 defining a diaphragm chamber 44 of cylindrical shape.
- a diaphragm 46 generally having a cylindrical shape is disposed
- the diaphragm 46 divides the diaphragm chamber 44 into two separate chambers, a high pressure gas chamber 48 disposed between the diaphragm 46 and the inner tube outer wall 34 and a fluid chamber 50 disposed between the diaphragm 46 and the outer tube inner wall 22.
- the diaphragm 46 could be made of any other gas impermeable elastomer.
- a gas charge seal 52 generally having a 'S' shape is disposed annularly in the high pressure gas chamber 48 and abuts the annular flange 40.
- the gas charge seal is an o-ring or other seal ring.
- the gas charge seal 52 engages the inner tube outer wall 34 and the outer tube inner wall 22 at the second end 38 of the inner tube 30.
- the 'S' shape of the gas charge seal 52 defines an inward groove 54 opening annularly to the inner tube outer wall 34 as well as an outward groove 56 opening annularly to the outer tube inner wall 22.
- a first annular seal 58 is disposed in the inward groove 54 in sealing engagement with the inner tube outer wall 34, and a second annular seal 60 is disposed in the outward groove 56 in sealing engagement with the inner tube outer wall 34.
- a cap 62 engages the closed end 28 of the outer tube 20, sealing the closed end 28 of the outer tube 20,
- An inner tube base 64 of cylindrical shape defines an outer periphery 66 being disposed in the first end 36 of the inner tube 30 and engages the cap 62 at the closed end 28 of the outer tube 20.
- the inner tube base 64 defines an annular shoulder 68 receiving and abutting the first end 36 of the inner tube 30 with the outer periphery 66 of the inner tube base 64 being concentric with the inner tube outer wall 34.
- the inner tube base 64 further defines a central cavity 70 of hollow cylindrical shape being disposed concentrically in the inner tube base 64.
- the inner tube base 64 allows fluid communication between the hydraulic chamber 42 and the fluid chamber 50 by use of a plurality of radially disposed channels 72 extending perpendicular to the center axis A between the central cavity 70 and the fluid chamber 50.
- the inner tube base 64 is closed and sealed by the cap 62.
- a base cup could be used instead of using the cap 62.
- a piston 74 is disposed in sliding and sealing engagement with the inner tube inner wall 32 within the hydraulic chamber 42, and a rod guide 76 of cylindrical shape defines an axial bore 78 being disposed in the open end 26.
- the rod guide 76 is in a sealing engagement with the inner tube inner wall 32, with a piston rod 80 connected to the piston 74 and extending along the center axis A and through the bore in the rod guide 76.
- a lower mounting member 82 with a ring shape is disposed along the center axis A on the closed end 28 of the outer tube 20 and connected to the cap 62.
- the lower mounting member 82 receives a mounting device.
- An upper mounting member 86 with a ring shape is disposed along the center axis A on the piston rod 80 receiving a mounting device.
- the upper mounting member 86 can be secured to the piston rod 80 by screwing or welding the upper mounting member 86 to the piston rod 80.
- the diaphragm 46 is held in place radially inwardly by an inner clamp 88 of annular shape in a sealing engagement with the inner tube outer wall 34.
- the inner clamp 88 axially overlaps the first end 36 of the inner tube 30 and the tube base at the shoulder 68 of the inner tube base 64.
- a radially inwardly disposed waist 90 defines an annular projection of the outer tube 20 extending radially inwardly to define a sealing surface 92 adjacent to the open end 26 of the outer tube 20.
- the diaphragm 46 extends from under the inner clamp 88 and through a 'U' shaped turn back toward the open end 26 along outer tube inner wall 22 and over the waist 90.
- the subject invention also includes a method for assembling a suspension damper for an automotive shock absorber comprising a first step of pressing the inner tube 30 onto the inner tube base 64 containing the central cavity 70 about the first end 36 of the inner tube 30, fitting one end of the diaphragm 46 over the inner tube outer wall 34 about the first end 36 of the inner tube 30.
- the fabrication continues by sealing the diaphragm 46 to the inner tube outer wall 34 adjacent the first end 36 by use of an inner clamp 88 defining an inner seal placed on the shoulder 68 between the inner tube 30 and the inner tube base 64. This seals the high pressure gas chamber 48 about the first end 36 of the inner tube 30.
- the diaphragm 46 is then pulled or rolled up the inner tube outer wall 34 over the inner clamp 88 and towards the second end 38 of the inner tube 30.
- the inner tube 30 the inner tube base 64 and the secured diaphragm 46 are inserted into the open end 26 of the outer tube 20.
- the closed end 28 of the outer tube 20 engages the cap 62, sealing the closed end 28 of the outer tube 20.
- the upper clamp 94 is lowered into the diaphragm chamber 44 from the open end 26 of the outer tube 20 between the diaphragm 46 and the inner tube outer wall 34.
- the upper clamp 94 is fitted to the diaphragm 46, separating the high pressure gas chamber 48 from the fluid chamber 50 inside the diaphragm chamber 44.
- a crimp force is applied to the outer tube outer wall 24 compressing the outer tube 20 and diaphragm 46 against the upper clamp 94 sealing the high pressure chamber at the open end 26.
- the crimp force creates the waist 90 in the outer tube 20 about the open end 26.
- the rod guide 76 is installed over the piston rod 80 and encloses the hydraulic chamber 42.
- the high pressure gas chamber 48 is charged with a high pressure fluid then sealed by securing a gas charge seal 52 to the open end 26 of the diaphragm chamber 44.
- the high pressure fluid is nitrogen.
- the diaphragm chamber 44 is then closed by rolling the annular flange 40 of the outer tube 20 inwardly to abut the inner tube 30 and the gas charge seal 52.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Description
A SUSPENSION DAMPER ASSEMBLY
BACKGROUND OF THE INVENTION
Field of the Invention
[0001] The present invention relates generally to a suspension damper assembly for use in an automotive shock absorber and a method for assembling the suspension damper.
Description of the Prior Art
[0002] A suspension damper of the type to which the subject invention pertains is illustrated in U.S. Pat. App. No. 2003/0019701 filed by Hodgson wherein an outer tube of cylindrical shape defines an outer tube inner wall and an outer tube outer wall and the outer tube extends concentrically about a center axis between an open end and a closed end. An inner tube of cylindrical shape defines an inner tube inner wall and an inner tube outer wall, the inner tube being disposed concentrically about the center axis and within the outer tube along the center axis between a first end and a second end. An annular flange disposed on the open end of the outer tube extends radially inwardly toward and perpendicular to the center axis to define an opening to the inner tube at the first end thereof.
[0003] The application further discloses the inner tube inner wall being spaced radially from the center axis to define a hydraulic chamber of cylindrical shape, and the inner tube outer wall being spaced radially from the outer tube inner wall to define a diaphragm chamber of cylindrical shape between the inner tube outer wall and the outer tube inner wall. A diaphragm of cylindrical shape is disposed concentrically between the inner tube outer wall and the outer tube inner wall along the center axis to divide the diaphragm chamber into a high pressure gas chamber disposed between the diaphragm and the inner tube outer wall and a fluid
chamber disposed between the diaphragm and the outer tube inner wall. A gas charge seal is disposed annularly in the high pressure gas chamber to engage the inner tube outer wall and the outer tube inner wall at the second end of the inner tube.
[0004] The application further discloses a cap engaging the closed end of the outer tube to seal the closed end and an inner tube base of cylindrical shape defines an outer periphery disposed in the first end of the inner tube to engage the cap at the closed end of the outer tube. The inner tube base defines a central cavity of hollow cylindrical shape disposed concentrically in the inner tube base and open to the hydraulic chamber and closed by the cap. The inner tube base further defines a plurality of radially disposed channels extending perpendicular to the center axis between the central cavity and the fluid chamber for establishing fluid communication between the hydraulic chamber and the fluid chamber.
[0005] The application further discloses a piston disposed in sliding and sealing engagement with the inner tube inner wall in the hydraulic chamber, a rod guide of cylindrical shape defining an axial bore is disposed in the open end and in sealing engagement with the inner tube inner wall, and a piston rod extends along the center axis and through the bore in the rod guide and connects to the piston for movement therewith. The U.S. Patent No. 7,226,045 to Brookes discloses an inner clamp of annular shape holding the diaphragm radially inwardly into sealing engagement with the inner tube outer wall.
[0006] The U.S. Pat. No. 4,392,293 to Yamaguchi et al. discloses a method of assembly of a diaphragm apparatus comprising the steps of disposing one end of the diaphragm over the first end of the inner tube, sealing the diaphragm to the inner tube outer wall adjacent the first end thereof to define an inner seal, rolling the diaphragm over the inner seal and towards
the second end of the inner tube, and finally inserting the inner tube and the diaphragm into the open end of the outer tube.
SUMMARY OF THE INVENTION AND ADVANTAGES
[0007] The subject invention provides such an assembly wherein the diaphragm extends from under the inner clamp and through a 'LP shaped turn back toward the open end along outer tube inner wall and an upper clamp of annular shape holds the diaphragm into the outer tube inner wall to seal the diaphragm to the outer tube inner wall. The invention also provides a method of assembling such a damper by sealing the diaphragm to the outer tube inner wall adjacent to the second end of the inner tube.
[0008] The subject invention provides for a damper assembly having improved packaging and without any remote reservoir. Additionally, the high pressure gas chamber can be filled after the damper apparatus has been assembled. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Other advantages of the present invention will be readily appreciated, as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
[0010] FIG. 1 is a front elevational view showing the suspension damper assembly of the subject invention;
[0011] FIG. 2 is a cross- sectional top view of the suspension damper assembly of the subject invention along line 2—2; and
[0012] FIG. 3 is a top cross-sectional view of the gas charge seal.
DETAILED DESCRIPTION OF THE ENABLING EMBODIMENTS
[0013] Referring to the Figures, wherein like numerals indicate corresponding parts throughout the several views, a suspension damper assembly for an automotive shock absorber constructed in accordance with the subject invention is shown generally in FIGS. 1 and 2.
[0014] A suspension damper for an automotive shock absorber includes an outer tube 20 generally having a cylindrical shape defining an outer tube inner wall 22 and an outer tube outer wall 24. The outer tube 20 extends concentrically about a center axis A between an open end 26 and a closed end 28. An inner tube 30 generally having a cylindrical shape defining an inner tube inner wall 32 and an inner tube outer wall 34 is disposed concentrically inside the outer tube 20 along the center axis A between a first end 36 and a second end 38. The outer tube 20 has an annular flange 40 disposed on the open end 26, and the annular flange 40 extends radially inwardly toward and perpendicular to the center axis A to define an opening to the inner tube 30 at the first end 36 thereof.
[0015] The inner tube inner wall 32 is spaced radially from the center axis A defining a hydraulic chamber 42 generally having a cylindrical shape. The inner tube outer wall 34 is spaced radially from the outer tube inner wall 22 defining a diaphragm chamber 44 of cylindrical shape. A diaphragm 46 generally having a cylindrical shape is disposed
concentrically between the inner tube outer wall 34 and the outer tube inner wall 22 along the center axis A inside the diaphragm chamber 44. The diaphragm 46 divides the diaphragm chamber 44 into two separate chambers, a high pressure gas chamber 48 disposed between the
diaphragm 46 and the inner tube outer wall 34 and a fluid chamber 50 disposed between the diaphragm 46 and the outer tube inner wall 22. Alternatively, instead of rubber, the diaphragm 46 could be made of any other gas impermeable elastomer.
[0016] A gas charge seal 52 generally having a 'S' shape is disposed annularly in the high pressure gas chamber 48 and abuts the annular flange 40. In an embodiment, the gas charge seal is an o-ring or other seal ring. The gas charge seal 52 engages the inner tube outer wall 34 and the outer tube inner wall 22 at the second end 38 of the inner tube 30. The 'S' shape of the gas charge seal 52 defines an inward groove 54 opening annularly to the inner tube outer wall 34 as well as an outward groove 56 opening annularly to the outer tube inner wall 22. A first annular seal 58 is disposed in the inward groove 54 in sealing engagement with the inner tube outer wall 34, and a second annular seal 60 is disposed in the outward groove 56 in sealing engagement with the inner tube outer wall 34.
[0017] A cap 62 engages the closed end 28 of the outer tube 20, sealing the closed end 28 of the outer tube 20, An inner tube base 64 of cylindrical shape defines an outer periphery 66 being disposed in the first end 36 of the inner tube 30 and engages the cap 62 at the closed end 28 of the outer tube 20. The inner tube base 64 defines an annular shoulder 68 receiving and abutting the first end 36 of the inner tube 30 with the outer periphery 66 of the inner tube base 64 being concentric with the inner tube outer wall 34. The inner tube base 64 further defines a central cavity 70 of hollow cylindrical shape being disposed concentrically in the inner tube base 64. The inner tube base 64 allows fluid communication between the hydraulic chamber 42 and the fluid chamber 50 by use of a plurality of radially disposed channels 72 extending perpendicular to the center axis A between the central cavity 70 and the
fluid chamber 50. The inner tube base 64 is closed and sealed by the cap 62. Alternatively, instead of using the cap 62, a base cup could be used.
[0018] A piston 74 is disposed in sliding and sealing engagement with the inner tube inner wall 32 within the hydraulic chamber 42, and a rod guide 76 of cylindrical shape defines an axial bore 78 being disposed in the open end 26. The rod guide 76 is in a sealing engagement with the inner tube inner wall 32, with a piston rod 80 connected to the piston 74 and extending along the center axis A and through the bore in the rod guide 76.
[0019] A lower mounting member 82 with a ring shape is disposed along the center axis A on the closed end 28 of the outer tube 20 and connected to the cap 62. The lower mounting member 82 receives a mounting device. An upper mounting member 86 with a ring shape is disposed along the center axis A on the piston rod 80 receiving a mounting device. In an embodiment, the upper mounting member 86 can be secured to the piston rod 80 by screwing or welding the upper mounting member 86 to the piston rod 80.
[0020] The diaphragm 46 is held in place radially inwardly by an inner clamp 88 of annular shape in a sealing engagement with the inner tube outer wall 34. The inner clamp 88 axially overlaps the first end 36 of the inner tube 30 and the tube base at the shoulder 68 of the inner tube base 64. A radially inwardly disposed waist 90 defines an annular projection of the outer tube 20 extending radially inwardly to define a sealing surface 92 adjacent to the open end 26 of the outer tube 20. The diaphragm 46 extends from under the inner clamp 88 and through a 'U' shaped turn back toward the open end 26 along outer tube inner wall 22 and over the waist 90. An upper clamp 94 of annular shape axially aligns with the waist 90 and holds the diaphragm 46 into the waist 90 of the outer tube inner wall 22, sealing the diaphragm 46 to the outer tube inner wall 22.
[0021] The subject invention also includes a method for assembling a suspension damper for an automotive shock absorber comprising a first step of pressing the inner tube 30 onto the inner tube base 64 containing the central cavity 70 about the first end 36 of the inner tube 30, fitting one end of the diaphragm 46 over the inner tube outer wall 34 about the first end 36 of the inner tube 30. The fabrication continues by sealing the diaphragm 46 to the inner tube outer wall 34 adjacent the first end 36 by use of an inner clamp 88 defining an inner seal placed on the shoulder 68 between the inner tube 30 and the inner tube base 64. This seals the high pressure gas chamber 48 about the first end 36 of the inner tube 30.
[0022] The diaphragm 46 is then pulled or rolled up the inner tube outer wall 34 over the inner clamp 88 and towards the second end 38 of the inner tube 30. The inner tube 30 the inner tube base 64 and the secured diaphragm 46 are inserted into the open end 26 of the outer tube 20. The closed end 28 of the outer tube 20 engages the cap 62, sealing the closed end 28 of the outer tube 20.
[0023] The upper clamp 94 is lowered into the diaphragm chamber 44 from the open end 26 of the outer tube 20 between the diaphragm 46 and the inner tube outer wall 34. The upper clamp 94 is fitted to the diaphragm 46, separating the high pressure gas chamber 48 from the fluid chamber 50 inside the diaphragm chamber 44. A crimp force is applied to the outer tube outer wall 24 compressing the outer tube 20 and diaphragm 46 against the upper clamp 94 sealing the high pressure chamber at the open end 26. The crimp force creates the waist 90 in the outer tube 20 about the open end 26.
[0024] The piston 74 and piston rod 80 are installed in the inner tube inner wall
32 and the hydraulic chamber 42 is filled with a hydraulic fluid. The rod guide 76 is installed over the piston rod 80 and encloses the hydraulic chamber 42. The high pressure gas chamber 48
is charged with a high pressure fluid then sealed by securing a gas charge seal 52 to the open end 26 of the diaphragm chamber 44. In an embodiment, the high pressure fluid is nitrogen. The diaphragm chamber 44 is then closed by rolling the annular flange 40 of the outer tube 20 inwardly to abut the inner tube 30 and the gas charge seal 52.
[0025] Obviously, many modifications and variations of the present invention are possible in light of the above teachings and may be practiced otherwise than as specifically described while within the scope of the appended claims. The use of the word "said" in the apparatus claims refers to an antecedent that is a positive recitation meant to be included in the coverage of the claims whereas the word "the" precedes a word not meant to be included in the coverage of the claims.
ELEMENT LIST
Element Symbol Element Name
A center axis
20 outer tube
22 outer tube inner wall
24 outer tube outer wall
26 o en end
28 closed end
30 inner tube
32 inner tube inner wall
34 inner tube outer wall
36 first end
38 second end
40 annular flange
42 hydraulic chamber
44 diaphragm chamber
46 diaphragm
48 high pressure gas chamber
50 fluid chamber
52 gas charge seal
54 inward groove
56 outward groove
58 first annular seal
60 second annular seal
62 cap
64 inner tube base
66 outer periphery
68 shoulder
70 central cavity
72 channels
74 piston
76 rod guide
78 axial bore
80 piston rod
82 lower mounting member
86 upper mounting member
88 inner clamp
90 waist
92 sealing surface
94 upper clamp
Claims
1. A suspension damper assembly for an automotive shock absorber comprising; an outer tube of cylindrical shape having an outer tube inner wall and an outer tube outer wall and extending concentrically about a center axis between an open end and a closed end,
an inner tube of cylindrical shape having an inner tube inner wall and an inner tube outer wall and disposed concentrically about said center axis and disposed concentrically in said outer tube along said center axis between a first end and a second end,
an annular flange disposed on said open end of said outer tube extending radially inwardly toward and perpendicular to said center axis to define an opening to said inner tube at said first end thereof,
said inner tube inner wall being spaced radially from said center axis to define a hydraulic chamber of cylindrical shape,
said inner tube outer wall being spaced radially from said outer tube inner wall to define a diaphragm chamber of cylindrical shape between said inner tube outer wall and said outer tube inner wall,
a diaphragm of cylindrical shape disposed concentrically between said inner tube outer wall and said outer tube inner wall along said center axis for dividing said diaphragm chamber into a high pressure gas chamber disposed between said diaphragm and said inner tube outer wall and a fluid chamber disposed between said diaphragm and said outer tube inner wall, a gas charge seal disposed annularly in said high pressure gas chamber engaging said inner tube outer wall and said outer tube inner wall at said second end of said inner tube, a cap engaging said closed end of said outer tube for sealing said closed end,
an inner tube base of cylindrical shape defining an outer periphery disposed in said first end of said inner tube and engaging said cap at said closed end of said outer tube,
said inner tube base defining a central cavity of hollow cylindrical shape disposed concentrically in said inner tube base and open to said hydraulic chamber and closed by said cap and defining a plurality of radially disposed channels extending perpendicular to said center axis between said central cavity and said fluid chamber for establishing fluid communication between said hydraulic chamber and said fluid chamber,
a piston disposed in sliding and sealing engagement with said inner tube inner wall in said hydraulic chamber,
a rod guide of cylindrical shape defining an axial bore and disposed in said open end and in sealing engagement with said inner tube inner wall,
a piston rod extending along said center axis and through said bore in said rod guide and connected to said piston for movement therewith,
an inner clamp of annular shape holding said diaphragm radially inwardly into sealing engagement with said inner tube outer wall,
said diaphragm extending from under said inner clamp and through a 'U' shaped turn back toward said open end along outer tube inner wall,
an upper clamp of annular shape for holding said diaphragm into said outer tube inner wall for sealing said diaphragm to said outer tube inner wall.
2. An assembly as set forth in claim 1 further including a radially inwardly disposed waist defining an annular projection of said outer tube extending radially inwardly to define a
sealing surface adjacent to said open end of said outer tube and said upper clamp being axially aligned with said waist for holding said diaphragm into said waist.
3. An assembly as set forth in claim 1 further including an annular shoulder receiving and abutting said first end of said inner tube with said outer periphery of said inner tube base being concentric with said inner tube outer wall.
4. A suspension damper assembly for an automotive shock absorber comprising; an outer tube of cylindrical shape having an outer tube inner wall and an outer tube outer wall and extending concentrically about a center axis between an open end and a closed end,
an inner tube of cylindrical shape having an inner tube inner wall and an inner tube outer wall and disposed concentrically about said center axis and disposed concentrically in said outer tube along said center axis between a first end and a second end,
an annular flange disposed on said open end of said outer tube extending radially inwardly toward and perpendicular to said center axis to define an opening to said inner tube at said first end thereof,
said inner tube inner wall being spaced radially from said center axis to define a hydraulic chamber of cylindrical shape,
said inner tube outer wall being spaced radially from said outer tube inner wall to define a diaphragm chamber of cylindrical shape between said inner tube outer wall and said outer tube inner wall,
a diaphragm of cylindrical shape disposed concentrically between said inner tube outer wall and said outer tube inner wall along said center axis for dividing said diaphragm chamber into a high pressure gas chamber disposed between said diaphragm and said inner tube outer wall and a fluid chamber disposed between said diaphragm and said outer tube inner wall, a gas charge seal disposed annularly in said high pressure gas chamber and having an 'S' shape abutting said annular flange and engaging said inner tube outer wall and said outer tube inner wall at said second end of said inner tube,
said 'S' shape of said gas charge seal defining an inward groove opening annularly to said inner tube outer wall and an outward groove opening annularly to said outer tube inner wall,
a first annular seal disposed in said inward groove in sealing engagement with said inner tube outer wall,
a second annular seal disposed in said outward groove in sealing engagement with said inner tube outer wall,
a cap engaging said closed end of said outer tube for sealing said closed end, an inner tube base of cylindrical shape defining an outer periphery disposed in said first end of said inner tube and engaging said cap at said closed end of said outer tube and defining an annular shoulder receiving and abutting said first end of said inner tube with said outer periphery of said inner tube base being concentric with said inner tube outer wall,
said inner tube base defining a central cavity of hollow cylindrical shape disposed concentrically in said inner tube base and open to said hydraulic chamber and closed by said cap and defining a plurality of radially disposed channels extending perpendicular to said center axis
between said central cavity and said fluid chamber for establishing fluid communication between said hydraulic chamber and said fluid chamber,
a piston disposed in sliding and sealing engagement with said inner tube inner wall in said hydraulic chamber,
a rod guide of cylindrical shape defining an axial bore and disposed in said open end and in sealing engagement with said inner tube inner wall,
a piston rod extending along said center axis and through said bore in said rod guide and connected to said piston for movement therewith,
a lower mounting member having a ring shape disposed along center axis on said closed end connected to said cap for receiving a mounting device,
an upper mounting member having a ring shape disposed along center axis on said piston rod for receiving a mounting device,
an inner clamp of annular shape holding said diaphragm radially inwardly into sealing engagement with said inner tube outer wall,
said inner clamp axially overlapping said first end of said inner tube and said tube base at said shoulder,
a radially inwardly disposed waist defining an annular projection of said outer tube extending radially inwardly to define a sealing surface adjacent to said open end of said outer tube,
said diaphragm extending from under said inner clamp and through a 'U' shaped turn back toward said open end along outer tube inner wall and over said waist,
an upper clamp of annular shape axially aligned with said waist for holding said diaphragm into said waist of said outer tube inner wall for sealing said diaphragm to said outer tube inner wall.
5. A method for assembling a suspension damper utilizing an inner tube, an outer tube, a diaphragm chamber disposed between the inner tube and the outer tube, a diaphragm disposed in the diaphragm chamber separating the diaphragm chamber into a high pressure gas chamber and a fluid chamber, said method comprising the steps of;
disposing one end of the diaphragm over a first end of the inner tube, sealing the diaphragm to the exterior of the inner tube adjacent the first end thereof to define an inner seal,
rolling the diaphragm over the inner seal and towards a second end of the inner tube,
inserting the inner tube and the diaphragm into the open end of the outer tube, sealing the diaphragm to the interior of the outer tube adjacent to the second end of the inner tube.
6. A method as set forth in claim 5 including applying a crimp force to the outer tube outer wall compressing the outer tube and the diaphragm against the upper clamp sealing the high pressure gas chamber about the open end and creating a waist in the outer tube outer wall.
7. A method as set forth in claim 5 including sealing the diaphragm to the inner tube outer wall adjacent the first end thereof to define an inner seal placed on the shoulder between the inner tube and the inner tube base sealing the high pressure gas chamber about the closed end. 8, A method for assembling a suspension damper for an automotive shock absorber utilizing an inner tube defining a hydraulic chamber and an inner tube inner wall and an inner tube outer wall, an outer tube defining an outer tube inner wall and an outer tube outer wall, the inner tube having a first end and a second end and the outer tube having an open end and a closed end, the outer tube having an annular flange, a diaphragm chamber disposed between the inner tube outer wall and the outer tube inner wall, a diaphragm disposed in the diaphragm chamber and separating the diaphragm chamber into a high pressure gas chamber and a fluid chamber, an inner tube base containing a central cavity and a shoulder, a waist in the outer tube outer wall, a gas charge seal and a rod guide, a piston and a piston rod disposed in the hydraulic chamber, a cap and a lower mounting bracket and an upper mounting bracket, and an inner clamp and an upper clamp, said method comprising the steps of;
pressing the inner tube onto the inner tube base containing the central cavity about the first end of the inner tube,
disposing one end of the diaphragm over the first end of the inner tube outer wall about the first end of the inner tube,
sealing the diaphragm to the inner tube outer wall adjacent the first end thereof to define an inner seal placed on the shoulder between the inner tube and the inner tube base sealing the high pressure gas chamber about the closed end,
rolling the diaphragm over the inner seal and towards the second end of the inner tube,
inserting the inner tube and the inner tube base and the diaphragm into the open end of the outer tube,
installing the cap and the lower mounting bracket to the closed end of the outer tube over the inner tube base sealing the closed end of the outer tube,
lowering the upper clamp into the diaphragm chamber from the open end of the outer tube between the diaphragm and the inner tube outer wall,
fitting the upper clamp to the diaphragm separating the high pressure gas chamber from the fluid chamber inside the diaphragm chamber,
applying a crimp force to the outer tube outer wall compressing the outer tube and the diaphragm against the upper clamp sealing the high pressure gas chamber about the open end and creating a waist in the outer tube outer wall,
installing the piston and the piston rod in the inner tube inner wall, filling the hydraulic chamber with a hydraulic fluid,
charging the high pressure gas chamber with a compressed fluid, sealing the high pressure gas chamber by disposing the gas charge seal in the diaphragm chamber,
closing the diaphragm chamber by rolling the annular flange of the outer tube inwardly to abut the inner tube and the gas charge seal,
installing the upper mounting bracket to the piston rod on the open end, and filling the high pressure gas chamber with a compressed fluid.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES12877969.1T ES2612183T3 (en) | 2012-05-30 | 2012-07-04 | A suspension shock absorber unit |
| EP12877969.1A EP2855966B1 (en) | 2012-05-30 | 2012-07-04 | A suspension damper assembly |
| JP2014539217A JP5698880B2 (en) | 2012-05-30 | 2012-07-04 | Suspension damper assembly |
| CN201280073648.0A CN104364552B (en) | 2012-05-30 | 2012-07-04 | suspension damper assembly |
| US14/350,540 US9334917B2 (en) | 2012-05-30 | 2012-07-04 | Suspension damper assembly |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261653104P | 2012-05-30 | 2012-05-30 | |
| US61/653,104 | 2012-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013177844A1 true WO2013177844A1 (en) | 2013-12-05 |
Family
ID=49672328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2012/078182 Ceased WO2013177844A1 (en) | 2012-05-30 | 2012-07-04 | A suspension damper assembly |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9334917B2 (en) |
| EP (1) | EP2855966B1 (en) |
| JP (1) | JP5698880B2 (en) |
| CN (1) | CN104364552B (en) |
| ES (1) | ES2612183T3 (en) |
| PL (1) | PL2855966T3 (en) |
| WO (1) | WO2013177844A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895991B (en) * | 2015-05-24 | 2017-12-29 | 珠海市业成轨道交通设备科技有限公司 | Horizontal oil-gas does not separate buffer |
| CN107606023B (en) * | 2017-09-06 | 2019-08-02 | 包头轻工职业技术学院 | Damper |
| CN108571557B (en) * | 2018-05-30 | 2024-07-02 | 宁波麦维科技有限公司 | Reciprocating damper |
| CN108547901B (en) * | 2018-06-19 | 2020-09-04 | 四川立地车辆底盘科技有限公司 | Method for adjusting rigidity of suspension gas spring |
| CN109340294A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A hydraulic damper with airbag in auxiliary fuel tank |
| CN109340295A (en) * | 2018-12-12 | 2019-02-15 | 河海大学常州校区 | A hydraulic damper with airbag in auxiliary fuel tank |
| KR102015014B1 (en) * | 2019-02-08 | 2019-08-29 | (주)케이시엠모터스 | Shock absorber for vehicle |
| DE102019131319A1 (en) * | 2019-11-20 | 2021-05-20 | Thyssenkrupp Ag | Vibration damper and motor vehicle with such a vibration damper |
| DE102020210538A1 (en) * | 2020-08-19 | 2022-02-24 | Thyssenkrupp Ag | Vibration damper and a damper tube for a vibration damper |
| CN116538222B (en) * | 2023-02-25 | 2025-11-11 | 安徽工业技术创新研究院六安院 | Folding thin-wall tube shock absorber for high frequency |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371751A (en) * | 1964-10-20 | 1968-03-05 | Armstrong Patents Co Ltd | Telescopic hydraulic shock absorbers |
| DE20115980U1 (en) * | 2001-09-28 | 2001-12-06 | PATEC Fahrwerktechnik GmbH, 58640 Iserlohn | Hydraulic telescopic damper |
| US20080185244A1 (en) * | 2007-02-07 | 2008-08-07 | Atsushi Maeda | Hydraulic shock absorber |
| JP2011027255A (en) * | 2009-06-30 | 2011-02-10 | Showa Corp | Hydraulic shock absorber |
| CN102155513A (en) * | 2010-02-12 | 2011-08-17 | 京西重工股份有限公司 | Fluid damper with internal compression spring |
Family Cites Families (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB864703A (en) * | 1958-08-01 | 1961-04-06 | Armstrong Patents Co Ltd | Improvements in or relating to hydraulic shock absorbers |
| BE620789A (en) * | 1959-06-20 | |||
| DE1630058B1 (en) * | 1967-10-09 | 1971-10-28 | Hoesch Ag | Hydropneumatic strut with internal level control device |
| US3527451A (en) * | 1968-05-13 | 1970-09-08 | Gen Motors Corp | Shock absorber with pressurizable reservoir chamber |
| BE790144A (en) * | 1971-10-22 | 1973-04-16 | Hoesch Ag | HYDROPNEUMATIC SPRING FORCE LEG WITH INTERNAL LEVEL REGULATOR |
| US3771626A (en) * | 1972-04-04 | 1973-11-13 | Monroe Auto Equipment Co | Pressurized shock absorber |
| US3874485A (en) * | 1972-05-01 | 1975-04-01 | Gen Motors Corp | Oleo-pneumatic shock absorber |
| US3798744A (en) * | 1972-05-01 | 1974-03-26 | Gen Motors Corp | A procedure for charging an oleo-pneumatic shock absorber |
| US3819166A (en) * | 1972-10-12 | 1974-06-25 | Gen Motors Corp | Gas bladder for combination liquid gas suspension device |
| FR2207563A5 (en) * | 1972-11-17 | 1974-06-14 | Allinquant Fernand | |
| US4105193A (en) * | 1976-11-26 | 1978-08-08 | General Motors Corporation | Shock absorber and leveling unit with auxiliary damping device for vehicle suspensions |
| JPS58184333A (en) * | 1982-04-22 | 1983-10-27 | Atsugi Motor Parts Co Ltd | hydraulic shock absorber |
| DE3706738A1 (en) * | 1987-03-02 | 1988-09-15 | Aros Hydraulik | HYDRAULIC SHOCK AND VIBRATION DAMPER |
| ES2121494B1 (en) * | 1994-01-31 | 1999-06-16 | Fichtel & Sachs Ah | PNEUMATIC SHOCK ABSORBER. |
| JP3696671B2 (en) * | 1995-09-29 | 2005-09-21 | カヤバ工業株式会社 | Vehicle height adjustment device |
| US6161662A (en) * | 1999-03-16 | 2000-12-19 | Delphi Technologies, Inc. | Suspension damper for motor vehicle |
| DE19961719A1 (en) * | 1999-12-21 | 2001-07-05 | Daimler Chrysler Ag | Spring damper system with hose bellows |
| WO2002085183A2 (en) * | 2001-04-19 | 2002-10-31 | Progressive Suspension, Inc. | Bladder for use in a damping device |
| US6695105B2 (en) * | 2001-09-12 | 2004-02-24 | Kayaba Industry Co., Ltd. | Hydraulic shock absorber |
| US20040262107A1 (en) * | 2001-09-24 | 2004-12-30 | Srinath Nandyal | Shock absorber having a pressurized gas compartment |
| DE10244002A1 (en) | 2002-09-21 | 2004-04-01 | Fte Automotive Gmbh & Co. Kg | Vacuum brake booster for an auxiliary brake system for motor vehicles |
| JP4181940B2 (en) * | 2003-08-01 | 2008-11-19 | カヤバ工業株式会社 | Hydraulic buffer with relief valve and vehicle height adjustment function |
| JP4883703B2 (en) * | 2007-07-31 | 2012-02-22 | カヤバ工業株式会社 | Double cylinder type shock absorber |
| JP5077549B2 (en) * | 2007-10-31 | 2012-11-21 | 日立オートモティブシステムズ株式会社 | Manufacturing method of hydraulic shock absorber |
| KR101162306B1 (en) * | 2008-03-05 | 2012-07-04 | 주식회사 만도 | Self leveling shock absorber |
| CN201249758Y (en) | 2008-07-30 | 2009-06-03 | 上海汽车制动系统有限公司 | Vacuum booster |
| CN201380843Y (en) | 2009-03-26 | 2010-01-13 | 上海汽车制动系统有限公司 | Dual boosting-ratio vacuum booster |
| CN101844555A (en) | 2009-03-26 | 2010-09-29 | 上海汽车制动系统有限公司 | Air booster |
| CN201651147U (en) * | 2010-03-11 | 2010-11-24 | 励明夫 | Large dual-drum high-pressure damper |
| CN102050101A (en) | 2010-12-29 | 2011-05-11 | 温州市东启汽车零部件制造有限公司 | Emergency braking device of vacuum booster |
| CN203472841U (en) | 2013-09-30 | 2014-03-12 | 京西重工（上海）有限公司 | Dual-power-assisted brake vacuum booster |
-
2012
- 2012-07-04 ES ES12877969.1T patent/ES2612183T3/en active Active
- 2012-07-04 JP JP2014539217A patent/JP5698880B2/en active Active
- 2012-07-04 WO PCT/CN2012/078182 patent/WO2013177844A1/en not_active Ceased
- 2012-07-04 PL PL12877969T patent/PL2855966T3/en unknown
- 2012-07-04 CN CN201280073648.0A patent/CN104364552B/en active Active
- 2012-07-04 US US14/350,540 patent/US9334917B2/en active Active
- 2012-07-04 EP EP12877969.1A patent/EP2855966B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371751A (en) * | 1964-10-20 | 1968-03-05 | Armstrong Patents Co Ltd | Telescopic hydraulic shock absorbers |
| DE20115980U1 (en) * | 2001-09-28 | 2001-12-06 | PATEC Fahrwerktechnik GmbH, 58640 Iserlohn | Hydraulic telescopic damper |
| US20080185244A1 (en) * | 2007-02-07 | 2008-08-07 | Atsushi Maeda | Hydraulic shock absorber |
| JP2011027255A (en) * | 2009-06-30 | 2011-02-10 | Showa Corp | Hydraulic shock absorber |
| CN102155513A (en) * | 2010-02-12 | 2011-08-17 | 京西重工股份有限公司 | Fluid damper with internal compression spring |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2855966A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014532846A (en) | 2014-12-08 |
| US9334917B2 (en) | 2016-05-10 |
| EP2855966A1 (en) | 2015-04-08 |
| EP2855966B1 (en) | 2016-10-12 |
| CN104364552B (en) | 2015-10-07 |
| JP5698880B2 (en) | 2015-04-08 |
| PL2855966T3 (en) | 2017-05-31 |
| CN104364552A (en) | 2015-02-18 |
| ES2612183T3 (en) | 2017-05-12 |
| US20150300441A1 (en) | 2015-10-22 |
| EP2855966A4 (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2855966B1 (en) | A suspension damper assembly | |
| US9206874B2 (en) | Damper with air spring | |
| US4044866A (en) | Method for filling gas into gas spring | |
| US9855812B2 (en) | Methods and apparatus for vehicle suspension having multiple gas volumes | |
| US4480730A (en) | Shock absorber unit for vehicles | |
| KR20180091875A (en) | Automotive vibration damper | |
| EP3153738A1 (en) | A shock absorber with hydraulic rebound system | |
| CA2402768C (en) | Hydraulic shock absorber | |
| CN106233026B (en) | Buffer device | |
| US9476476B2 (en) | Shock absorber | |
| JP6744983B2 (en) | Especially, a housing block of a hydraulic unit of a vehicle brake facility that can electronically control slip. | |
| JP7067885B2 (en) | Front fork and manufacturing method of front fork | |
| WO2008076176A2 (en) | New top cap crimping for air spring suspension | |
| US20160200284A1 (en) | High-pressure gas cylinder | |
| CN101260916A (en) | shock absorber | |
| KR20170098227A (en) | Cylinder device | |
| CN110748596B (en) | Annular sealing unit for guiding monotube shock absorber | |
| JPH0316537B2 (en) | ||
| US20060175168A1 (en) | Pressure container in a vibration damper | |
| JP2020076481A (en) | Pressure buffer device and manufacturing method of the same | |
| CN106523575B (en) | Adjustable shock | |
| CN207122540U (en) | Pull-type damping buffer | |
| JP6295114B2 (en) | Erecting grease sliding front fork and wheel suspension device provided with the same | |
| JPS6116859B2 (en) | ||
| JP2001200878A (en) | Aluminum single tube damper |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12877969 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 14350540 Country of ref document: US |
|
| ENP | Entry into the national phase |
Ref document number: 2014539217 Country of ref document: JP Kind code of ref document: A |
|
| REEP | Request for entry into the european phase |
Ref document number: 2012877969 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2012877969 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |