WO2007084018A1 - Pneumatic-and-hydraulic cylinder with piston rod interlock - Google Patents

Pneumatic-and-hydraulic cylinder with piston rod interlock Download PDF

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Publication number
WO2007084018A1
WO2007084018A1 PCT/PL2006/000051 PL2006000051W WO2007084018A1 WO 2007084018 A1 WO2007084018 A1 WO 2007084018A1 PL 2006000051 W PL2006000051 W PL 2006000051W WO 2007084018 A1 WO2007084018 A1 WO 2007084018A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston rod
pneumatic
hydraulic cylinder
sleeve
locking
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
Application number
PCT/PL2006/000051
Other languages
French (fr)
Inventor
Zbigniew Czarnota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
'rewa' Sp Z Oo
Original Assignee
'rewa' Sp Z Oo
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 'rewa' Sp Z Oo filed Critical 'rewa' Sp Z Oo
Priority to DE602006020628T priority Critical patent/DE602006020628D1/en
Priority to EP06769514A priority patent/EP1977116B1/en
Priority to AT06769514T priority patent/ATE501362T1/en
Publication of WO2007084018A1 publication Critical patent/WO2007084018A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Definitions

  • the subject of this invention is the pneumatic-and-hydraulic cylinder with interlock of its piston rod, for application in control systems for opening and closing industrial fixtures, such as fume- extraction flap valves.
  • 317708 has two cylinder end caps, one provided with a hole for piston rod connected with piston that is reciprocal between said two cylinder end caps.
  • the cylinder end caps are joined on their one side with the cylinder through a screw joint, whereas their other sides are provided with channels for hydraulic medium inlet and outlet to and from respective chambers created between the piston and the cylinder end caps, whereas each of the end caps contains an external member and insert, and the hydraulic medium channels are shaped through the external member and that insert.
  • the hydraulic cylinder known from Polish application for utility pattern, W- 104190 has a bottom with catch eye means fixed to it and a piston inside the cylinder with the piston rod ending with front eye means, as well as an in-built hydraulic system with a double, crosswise through hole controlled by a check valve that consists of forward check valve and retreat check valve.
  • the cylinder bottom is provided with two flat cutouts at both outlets of the crosswise through hole, and the retreat check valve is provided with an internal channel that is connected with external output head, with and external pipe connected to it.
  • Hydraulic-and-pneumatic cylinder known from Polish patent specification, P-334324, has front and rear cylinder covers that are connected with sleeve coupler through hollow angle connectors, and the end of its piston rod is provided with eye bolt and locking piston fixed to it, with the top seal of the latter adhering to cylindrical surface of the front cover, whereas an annular chamber is created between the front cover face and the face of the locking piston.
  • Said chamber contains steel balls resting on piston rod surface, whereas the end of cylindrical surface of the front cover is separably connected with the bottom which adheres to locking piston surface, and a helical spring is installed in the circumferential gap created between the bottom and the locking piston.
  • the front cover has a small channel which joins the angular connector seat with annular chamber with cylinder chamber, whereas the side surface of the rear cover has also two stub pipes for cylinder working medium screwed in coaxially to each other, and the stub pipes and angular connector are connected with channels, as well as the channel provided in main axis of the real cover.
  • the invention aims to develop a new design of pneumatic-and- hydraulic cylinder with an interlock in order to ensure its safe cooperation with opening and closing mechanisms of fume extraction flap valves.
  • the essence of the pneumatic-and-hydraulic cylinder with interlock of its piston rod of this invention is that it has a front cover with locking unit mounted tightly at one end inside cylindrical sleeve, and a rear cover, also with locking unit, mounted tightly at the other end of that sleeve.
  • the locking unit of the front cover of the cylinder consists a piston in tight mounting on piston rod and in the sleeve body seat, with steel balls located in-between and adhering to piston rod surface, said piston rod being pressed from above with helical springs that are based in the lid covering the upper end of the sleeve body, as well as the unlocking ring mounted rotatably on its external surface, said unlocking ring being connected with said body through springing means so that its turning angle is limited.
  • the locking unit at the rear cover of the cylinder consists of a plunger with axial seat accommodating other plunger with locking steel balls on its upper surface, whereas the lower surface of the external plunger is pressed by helical springs based in the lid that covers the lower end of sleeve body, whereas the unlocking ring is rotatable on the external surface of the body and is connected to it through springing means limiting its turning angle.
  • Both locking units have profile slot cutouts provided side surface of the unlocking ring, situated opposite each other, and functioning as cams, containing the head of bolt mounted in the sleeve body, whereas the spring means with the unlocking ring are shielded with cover separably connected with that ring.
  • said springing means are in the form of helical tensioning springs with their one end hitched to pins located in unlocking ring and their other ends hitched to pins located on sleeve body.
  • fig.1 and 2 present the pneumatic- and-hydraulic cylinder with interlock in form of two axial sections perpendicular to each other along the lines A-A and B-B showing its piston rod in the extreme front position in blocked condition and in the extreme rear position in blocked condition
  • fig.3 is the front view of the front cover with feeding and locking of the same cylinder
  • fig.4 is the axial section of the same cover with locking ring in blocked and unblocked positions
  • fig.6 is the cross section of the same cover sectioned along the line E-E
  • fig.7 is the cross section of the same cover sectioned along the line F-F
  • fig.8 is the vertical section of the same cover sectioned along the line G-G in fig.7
  • fig.9 is the cross section of the same cover sectioned along the line H-H in fig.7
  • fig.10 is the axial section of the rear cover with cylinder interlock with locking ring
  • fig.11 is the axial section of the same cover sectioned along the line K-K in fig.10
  • fig.12 is the cross section of the same cover sectioned along the line L-L in fig.10
  • fig.13 is the cross section of the same cover sectioned along the line
  • fig.14 is the cross section of the same cover sectioned along the line P-P in fig.13
  • fig.15 is the vertical section of the same cover sectioned along the line R-R in fig.13
  • fig.16 is the cross section of the same cover sectioned along the line T-T- in fig.10.
  • the front cover 4 consists of sleeve body H with a three-stage outer diameter and a two-stage inner diameter with circumferential
  • unlocking ring 13 are provided with two pins JjS, located opposite each other, with two hitched tensioning springs 19 enabling the unlocking of that ring, whereas the sleeve body Ll is mounted inside one end of the cylindrical sleeve 1. Both tensioning springs 19 with the unlocking ring H are shielded with the cover 20 connected with that ring with crews
  • the inner upper face 22 of the sleeve body H bears the front locking plunger 23_ provided with external seal 24 adhering to the surface of sleeve body H and with internal seal 25 adhering to the piston rod 3 , whereas the lower end of the plunger has a chamfer 26 contacting circumferentially arranged locking balls 27, which rest also
  • the upper face of the sleeve body 1_ bears the lid 29 of the front cover 4 connected with that body with mounting ring 30, whereas the lover end of the body is provided with slide sleeve 31_, and the lid 29 is provided with slide 125 sleeve 32 and the scraping ring 33 .
  • the lower face of the lid 29 has two cylindrical seats 34, containing helical tensioning springs 35_ with their lower ends resting on the face 22 of the sleeve body H.
  • the rear cover 7 is of similar design as the front cover 4 and it also comprises the sleeve body 36 three-stage outer diameter and two-
  • the flange 37 bears the rotatable locking unit 8 constituting an unlocking ring 13_, also having on its side surface two opposite profiled slot ports 14 functioning as cams containing the heads of bolts 16 screwed in the upper end of that body and functioning as guides,
  • the inner upper face 38 of the sleeve body 36 bears the rear lock plunger 40 with the seal 4_1, and containing the plunger 42 of locking balls 43 arranged between face 39 and the rear lock plunger 40.
  • the upper face of the sleeve body 36 bears the lid 45 that closes
  • the cylinder of the invention is supplied with pneumatic or oil

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Servomotors (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

Pneumatic-and-hydraulic cylinder with interlock of its piston rod consisting of cylinder with two end covers, internal piston rod provided with piston moving between said covers as well as with eye bolt, both said covers being interconnected with pipe connector through angular connectors, wherein one end of the cylindrical sleeve (1) is provided with tight-mounted front cover (4) with locking unit (6) and at the other end said sleeve is provided with tight-mounted rear cover (7) with locking unit (8). Both the front cover (4) and the rear cover (7) are provided with locking units of similar design, whereas the locking unit (6) of said front cover (4) consists of plunger (23) mounted tight on piston rod (3) and in the seat of sleeve body (3CB), with steel balls (27) located in-between and adjacent to the surface piston rod (3), which is pressed from above with helical springs (35) that are based in the lid (29) covering the upper end of the sleeve body (1) as well as the unlocking ring (13), mounted rotatably on its external surface, said unlocking ring (13) being connected with said body through springing means (19) so that its turning angle is limited.

Description

Pneumatic-and-hydraulic cylinder with piston rod interlock
The subject of this invention is the pneumatic-and-hydraulic cylinder with interlock of its piston rod, for application in control systems for opening and closing industrial fixtures, such as fume- extraction flap valves. A hydraulic cylinder known from Polish patent application, P-
317708, has two cylinder end caps, one provided with a hole for piston rod connected with piston that is reciprocal between said two cylinder end caps. The cylinder end caps are joined on their one side with the cylinder through a screw joint, whereas their other sides are provided with channels for hydraulic medium inlet and outlet to and from respective chambers created between the piston and the cylinder end caps, whereas each of the end caps contains an external member and insert, and the hydraulic medium channels are shaped through the external member and that insert. The hydraulic cylinder known from Polish application for utility pattern, W- 104190, has a bottom with catch eye means fixed to it and a piston inside the cylinder with the piston rod ending with front eye means, as well as an in-built hydraulic system with a double, crosswise through hole controlled by a check valve that consists of forward check valve and retreat check valve. The cylinder bottom is provided with two flat cutouts at both outlets of the crosswise through hole, and the retreat check valve is provided with an internal channel that is connected with external output head, with and external pipe connected to it.
Hydraulic-and-pneumatic cylinder known from Polish patent specification, P-334324, has front and rear cylinder covers that are connected with sleeve coupler through hollow angle connectors, and the end of its piston rod is provided with eye bolt and locking piston fixed to it, with the top seal of the latter adhering to cylindrical surface of the front cover, whereas an annular chamber is created between the front cover face and the face of the locking piston. Said chamber contains steel balls resting on piston rod surface, whereas the end of cylindrical surface of the front cover is separably connected with the bottom which adheres to locking piston surface, and a helical spring is installed in the circumferential gap created between the bottom and the locking piston. The front cover has a small channel which joins the angular connector seat with annular chamber with cylinder chamber, whereas the side surface of the rear cover has also two stub pipes for cylinder working medium screwed in coaxially to each other, and the stub pipes and angular connector are connected with channels, as well as the channel provided in main axis of the real cover.
The invention aims to develop a new design of pneumatic-and- hydraulic cylinder with an interlock in order to ensure its safe cooperation with opening and closing mechanisms of fume extraction flap valves. The essence of the pneumatic-and-hydraulic cylinder with interlock of its piston rod of this invention is that it has a front cover with locking unit mounted tightly at one end inside cylindrical sleeve, and a rear cover, also with locking unit, mounted tightly at the other end of that sleeve. The locking unit of the front cover of the cylinder consists a piston in tight mounting on piston rod and in the sleeve body seat, with steel balls located in-between and adhering to piston rod surface, said piston rod being pressed from above with helical springs that are based in the lid covering the upper end of the sleeve body, as well as the unlocking ring mounted rotatably on its external surface, said unlocking ring being connected with said body through springing means so that its turning angle is limited. In turn, the locking unit at the rear cover of the cylinder consists of a plunger with axial seat accommodating other plunger with locking steel balls on its upper surface, whereas the lower surface of the external plunger is pressed by helical springs based in the lid that covers the lower end of sleeve body, whereas the unlocking ring is rotatable on the external surface of the body and is connected to it through springing means limiting its turning angle. Both locking units have profile slot cutouts provided side surface of the unlocking ring, situated opposite each other, and functioning as cams, containing the head of bolt mounted in the sleeve body, whereas the spring means with the unlocking ring are shielded with cover separably connected with that ring. Favorably, said springing means are in the form of helical tensioning springs with their one end hitched to pins located in unlocking ring and their other ends hitched to pins located on sleeve body.
The subject of the invention is illustrated on the example of its embodiment in the drawings, where fig.1 and 2 present the pneumatic- and-hydraulic cylinder with interlock in form of two axial sections perpendicular to each other along the lines A-A and B-B showing its piston rod in the extreme front position in blocked condition and in the extreme rear position in blocked condition, fig.3 is the front view of the front cover with feeding and locking of the same cylinder, fig.4 is the axial section of the same cover with locking ring in blocked and unblocked positions, sectioned along the line C-C in fig.3, fig.5 is the axial section of the same cover with locking ring in blocked and unblocked positions, sectioned along the line D-D in fig.4, fig.6 is the cross section of the same cover sectioned along the line E-E, fig.7 is the cross section of the same cover sectioned along the line F-F, fig.8 is the vertical section of the same cover sectioned along the line G-G in fig.7,
85 fig.9 is the cross section of the same cover sectioned along the line H-H in fig.7, fig.10 is the axial section of the rear cover with cylinder interlock with locking ring, fig.11 is the axial section of the same cover sectioned along the line K-K in fig.10, fig.12 is the cross section of the same cover sectioned along the line L-L in fig.10, fig.13 is the cross
90 section of the same cover sectioned along the line N-N, fig.14 is the cross section of the same cover sectioned along the line P-P in fig.13, fig.15 is the vertical section of the same cover sectioned along the line R-R in fig.13 and fig.16 is the cross section of the same cover sectioned along the line T-T- in fig.10.
95 Pneumatic-hydraulic with the interlock of its piston rod consists of cylindrical sleeve 1 containing shiftable piston 2, on piston rod 3 located in the axis of the sleeve I, one end of said sleeve being provided with tight-mounted front cover 4 provided with feeding connectors 5_ and the locking unit 6, and the other end being provided with tight-
100 mounted rear cover 7 with locking unit £ and feeding connectors 9 connected, through sleeve connectors H), with feeding connectors 5_ of the front cover 4.
The front cover 4 consists of sleeve body H with a three-stage outer diameter and a two-stage inner diameter with circumferential
105 flange \2, which bears the locking unit constituting a rotatable unlocking ring H having on its side surface two opposite profiled slot ports 14 with its curvilinear lower edges 15 functioning as cams containing the heads of bolts 16 screwed in the upper end of the body, whereas the upper surface L7 of its flange 12 and the side surface of the
110 unlocking ring 13 are provided with two pins JjS, located opposite each other, with two hitched tensioning springs 19 enabling the unlocking of that ring, whereas the sleeve body Ll is mounted inside one end of the cylindrical sleeve 1. Both tensioning springs 19 with the unlocking ring H are shielded with the cover 20 connected with that ring with crews
115 2L In turn, the inner upper face 22 of the sleeve body H bears the front locking plunger 23_ provided with external seal 24 adhering to the surface of sleeve body H and with internal seal 25 adhering to the piston rod 3 , whereas the lower end of the plunger has a chamfer 26 contacting circumferentially arranged locking balls 27, which rest also
120 on the upper face 22 of the sleeve body H, and are contained in the circumferential channel 28 of the piston rod 3. Besides, the upper face of the sleeve body 1_ bears the lid 29 of the front cover 4 connected with that body with mounting ring 30, whereas the lover end of the body is provided with slide sleeve 31_, and the lid 29 is provided with slide 125 sleeve 32 and the scraping ring 33., whereas the lower face of the lid 29 has two cylindrical seats 34, containing helical tensioning springs 35_ with their lower ends resting on the face 22 of the sleeve body H.
The rear cover 7 is of similar design as the front cover 4 and it also comprises the sleeve body 36 three-stage outer diameter and two-
130 stage inner diameter with circum-ferential flange 37. Similarly as in the front cover, the flange 37 bears the rotatable locking unit 8 constituting an unlocking ring 13_, also having on its side surface two opposite profiled slot ports 14 functioning as cams containing the heads of bolts 16 screwed in the upper end of that body and functioning as guides,
135 whereas the upper surface 38 of its flange 37 and the side surface of the unlocking ring 13. and the side surface of the unlocking ring 18, located opposite each other, with two hitched tensioning springs 19 enabling the unlocking of that ring. Both tensioning springs 19 and the unlocking ring 13_ are shielded with the cover 20 connected with that ring with
140 crews 2L
In turn, the inner upper face 38 of the sleeve body 36 bears the rear lock plunger 40 with the seal 4_1, and containing the plunger 42 of locking balls 43 arranged between face 39 and the rear lock plunger 40. Besides, the upper face of the sleeve body 36 bears the lid 45 that closes
145 the reai- cover 7 connected with that body with mounting ring 30, whereas the lover face of the lid 45 has two cylindrical seats 44, containing helical compression springs 46, with their lower ends resting on the face of the plunger 40 of the real lock.
The cylinder of the invention is supplied with pneumatic or oil
150 working medium enabling its operation in the manner that is commonly known and applied.

Claims

Patent Claims
1. Pneumatic-and-hydraulic cylinder with interlock of its piston rod consisting of cylinder with two end covers, internal piston rod provided with piston moving between said covers as well as with eye bolt and locking piston resting on steel balls backed by the face of the front cover, provided with channels connecting the inter-piston chamber with the seat of angular connector and with the chamber under locking piston, both said covers being interconnected with pipe connector through angular connectors, wherein one end of the cylindrical sleeve (1) is provided with tight-mounted front cover (4) with locking unit (6) and at the other end said sleeve is provided with tight-mounted rear cover (T) with locking unit (8).
2. Pneumatic-and-hydraulic cylinder as set forth in claim 1 wherein said locking unit (6) of said front cover (4) consists of plunger (23) mounted tight on piston rod (3) and in the seat of sleeve body Qi), with steel balls (27) located in-between and adjacent to the surface piston rod (3), which is pressed from above with helical springs (35) that are based in the lid (29) covering the upper end of the sleeve body (I) as well as the unlocking ring (13), mounted rotatably on its external surface, said unlocking ring (13) being connected with said body through springing means (.19) so that its turning angle is limited.
3. Pneumatic-and-hydraulic cylinder as set forth in claim 1 wherein the locking unit (8) of the rear cover (7) consists of plunger (40) with axial seat axial seat accommodating the plunger (42) with locking steel balls (43) on its upper surface, whereas the lower surface of the plunger (40) is pressed by helical springs (46) based in the lid (45) that covers the lower end of sleeve body (36), whereas the unlocking ring (13) is mounted rotatable on the external surface of said body and connected to it with spring means (19) limiting its turning angle.
4. Pneumatic-and-hydraulic cylinder as set forth in claim 1 or 2 or 3 wherein the unlocking ring (13) is provided with profile slot ports (14) on its side surface arranged opposite each other and functioning as cams containing the head of bolt (26) based in the sleeve body (H) and (36).
5. Pneumatic-and-hydraulic cylinder as set forth in claim 1 or 2 or 3 wherein the springing elements (19) are in the form of helical tensioning springs with their ends engaging the pins (18) based in the unlocking ring, and their other ends engaging the pins (18) based in the sleeve body QJJ or (36).
6. Pneumatic-and-hydraulic cylinder as set forth in claim 1 or 2 or 3 or 5 wherein the springing means Q9) with unlocking ring
(13.) are shielded with the cover (20) connected separably with said ring.
PCT/PL2006/000051 2006-01-23 2006-07-21 Pneumatic-and-hydraulic cylinder with piston rod interlock Ceased WO2007084018A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE602006020628T DE602006020628D1 (en) 2006-01-23 2006-07-21 COMPRESSED AIR AND HYDRAULIC CYLINDER WITH PISTON BAR LOCKING
EP06769514A EP1977116B1 (en) 2006-01-23 2006-07-21 Pneumatic-and-hydraulic cylinder with piston rod interlock
AT06769514T ATE501362T1 (en) 2006-01-23 2006-07-21 COMPRESSED AIR AND HYDRAULIC CYLINDERS WITH PISTON ROD LOCKING

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PLP-378794 2006-01-23
PL378794A PL210645B1 (en) 2006-01-23 2006-01-23 Pneumatic-hydraulic servomotor with the plunger rod blockade

Publications (1)

Publication Number Publication Date
WO2007084018A1 true WO2007084018A1 (en) 2007-07-26

Family

ID=37312015

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2006/000051 Ceased WO2007084018A1 (en) 2006-01-23 2006-07-21 Pneumatic-and-hydraulic cylinder with piston rod interlock

Country Status (5)

Country Link
EP (1) EP1977116B1 (en)
AT (1) ATE501362T1 (en)
DE (1) DE602006020628D1 (en)
PL (1) PL210645B1 (en)
WO (1) WO2007084018A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101943289A (en) * 2010-08-19 2011-01-12 江阴市普泰隆阀业有限公司 Feeding and pneumatic integrated control valve of reduction furnace
US20150274283A1 (en) * 2014-03-31 2015-10-01 Goodrich Corporation Shrinking System for Landing Gear
CN105986729A (en) * 2015-02-13 2016-10-05 宁波欧适节能科技有限公司 Air pressure executive device with automatic locking buckling function
CN111734713A (en) * 2020-07-13 2020-10-02 方盛车桥（柳州）有限公司 Steering locking cylinder
CN114030596A (en) * 2021-12-17 2022-02-11 江西洪都航空工业集团有限责任公司 Sleeve type stay bar with snap ring inner lock

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111059094B (en) * 2020-01-09 2021-09-14 长春工业大学 Limit screw rod rotation decoupling type mechanical rodless locking cylinder
CN112049829B (en) * 2020-08-18 2022-04-15 温州大学 A bidirectional variable mechanism and bidirectional variable pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397620A (en) * 1966-10-06 1968-08-20 Milwaukee Cylinder Corp Fluid actuator with annular piston locking means
DE3018920A1 (en) * 1980-05-17 1981-11-26 Fa. Rolf Andexer, 4030 Ratingen Pressure cylinder piston interlock - has locking valve, acting with locking slide, and time delay
DE8812882U1 (en) * 1988-10-13 1989-02-16 Fa. Otto Grasl, 3452 Heiligeneich Pneumatic cylinder with end position locking, especially for operating smoke extraction flaps
US5806406A (en) * 1994-06-15 1998-09-15 Ab Multidock Hydraulic Hydraulic piston cylinder
EP0903502A1 (en) * 1997-09-18 1999-03-24 Etablissements Contat Freres Actuator for locking and unlocking

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397620A (en) * 1966-10-06 1968-08-20 Milwaukee Cylinder Corp Fluid actuator with annular piston locking means
DE3018920A1 (en) * 1980-05-17 1981-11-26 Fa. Rolf Andexer, 4030 Ratingen Pressure cylinder piston interlock - has locking valve, acting with locking slide, and time delay
DE8812882U1 (en) * 1988-10-13 1989-02-16 Fa. Otto Grasl, 3452 Heiligeneich Pneumatic cylinder with end position locking, especially for operating smoke extraction flaps
US5806406A (en) * 1994-06-15 1998-09-15 Ab Multidock Hydraulic Hydraulic piston cylinder
EP0903502A1 (en) * 1997-09-18 1999-03-24 Etablissements Contat Freres Actuator for locking and unlocking

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101943289A (en) * 2010-08-19 2011-01-12 江阴市普泰隆阀业有限公司 Feeding and pneumatic integrated control valve of reduction furnace
US20150274283A1 (en) * 2014-03-31 2015-10-01 Goodrich Corporation Shrinking System for Landing Gear
US9481453B2 (en) * 2014-03-31 2016-11-01 Goodrich Corporation Shrinking system for landing gear
CN105986729A (en) * 2015-02-13 2016-10-05 宁波欧适节能科技有限公司 Air pressure executive device with automatic locking buckling function
CN111734713A (en) * 2020-07-13 2020-10-02 方盛车桥（柳州）有限公司 Steering locking cylinder
CN114030596A (en) * 2021-12-17 2022-02-11 江西洪都航空工业集团有限责任公司 Sleeve type stay bar with snap ring inner lock
CN114030596B (en) * 2021-12-17 2023-08-11 江西洪都航空工业集团有限责任公司 A sleeve type strut with snap ring inner lock

Also Published As

Publication number Publication date
ATE501362T1 (en) 2011-03-15
DE602006020628D1 (en) 2011-04-21
EP1977116B1 (en) 2011-03-09
EP1977116A1 (en) 2008-10-08
PL210645B1 (en) 2012-02-29
PL378794A1 (en) 2007-08-06

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