US2986124A - Device for limiting the opening stroke of a tool-carrier - Google Patents

Device for limiting the opening stroke of a tool-carrier Download PDF

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Publication number
US2986124A
US2986124A US70935258A US2986124A US 2986124 A US2986124 A US 2986124A US 70935258 A US70935258 A US 70935258A US 2986124 A US2986124 A US 2986124A
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United States
Prior art keywords
piston
opening
tool
duct
chamber
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.)
Expired - Lifetime
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English (en)
Inventor
Allemann Paul
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.)
Matisa Materiel Industriel SA
Materiel Industriel SA
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Matisa Materiel Industriel SA
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Application filed by Matisa Materiel Industriel SA filed Critical Matisa Materiel Industriel SA
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Expired - Lifetime legal-status Critical Current

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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/16—Sleeper-tamping machines
    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3138—Directional control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/765—Control of position or angle of the output member
    • F15B2211/7653—Control of position or angle of the output member at distinct positions, e.g. at the end position
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/85—Control during special operating conditions
    • F15B2211/853—Control during special operating conditions during stopping
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8606—Control during or prevention of abnormal conditions the abnormal condition being a shock
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/8671—With annular passage [e.g., spool]

Definitions

  • total closing and total opening must be chosen according to the extreme conditions imposed by the various arrangements of the sleepers of railway lines, and in' particular by the pitch or distance between two consecutive sleepers and by the width of the sleepers. From'this it can be seen that the available total travel of a tool-car rier is in most cases considerably greater than the-useful travel strictly necessary for any one packing operation,
  • this dead return motion may be advantageously chosen to be even more rapid than in the actual designs, on condition that suflicient precautions against shocks are taken.
  • this opening motion may continue unhindered to the end of the travel, so that its interruption in an in termediate position is less easily effected and thus depends on the skill of the operator and on the attention he devotes to the work.
  • a motion extending beyond the desired limit position therefore results in a relatively considerable loss of time owing to the corresponding useless return travel which is effected at a lower speed.
  • this limited opening depends essentially on the distance between two consecutive sleepers, which can vary considerably according to circumstances.
  • ballast which will allow the maximum quantity of ballast to be gathered and in the case of a small spacing between thesleepers will enable avoiding the need for repetition of a complete packing cycle in order to obtain a suflicient packing of the ballast.
  • the object of the present invention is a hydraulic or pneumatic pressure fluid controlled device for actuatingthe tool-carriers of a machine for packing the ballast of railway lines, which is characterized in that it comprises means which limit the opening stroke of the tool-carriers Patented May 30, 1961' 3 by acting on one at least of the inlet and outlet ducts of at least one cylinder in which moves the piston actuating at least one tool-carrier.
  • Fig. 1 is a diagrammatic illustration of a first embodiment of the invention.
  • Fig. 2 relates to a variant.
  • Fig. 3 is a partial cross-section along line 3-3 in Fig. 2.
  • Fig. 4 is a view similar to the one shown in Fig. 2 but relating to a further variant.
  • Fig. 5 is a diagrammatic illustration of a further embodiment.
  • a tool-carrier constituted by a cylinder 2 in which can move a differential piston 3 driving the tool-carrier, which is not shown, by means of the articulation 4, under the action of a liquid (for instance oil) provided through a distributor 5 controlled by a slide valve 11, fed by a source which in this example is represented by a pump 6 supposed mounted on the fixed frame with a regulating valve 7 and a settling tank 8 for the returning oil.
  • a liquid for instance oil
  • the pump 6 which has already been mentioned, delivers fluid, through the inlet duct 22 and through the distributor, to the free outlet duct 12 which also relieves the chamber 13 (through the duct 17), while the oil contained in the chamber 14 is unable to escape through the distributor, owing to the fact that the ducts 16 and 19 are then cut off (by the slide valve 11) from the ducts 21 and 22.
  • the piston is thus immobilized in any given position of its travel.
  • the part 15, forming a piston, of the slide valve 11 interrupts the direct communication, through the distributor, between the inlet duct 22 and the outlet duct 12.
  • the distributor releases the escape from the chamber 14 through the two ducts 16 and 12 which it then causes to communicate with one another.
  • pump 6 acting in the chamber 13 moves in the direction of the opening, i.e. towards the left in the drawing, until it obstructs the opening 18 of the outlet duct 16.
  • the piston 3 comes to rest in this limit position which is thus determined by the intermediate position of the opening 18.
  • the described device may be easily transformed into a device for limiting the opening having several degrees, as shown by the variant according to Figs. 2 and 3, illustrating the arrangement to this elfect of the cylinder 2 and of the piston 3 connected to the ducts 16, 17, and 18 of the preceding embodiment.
  • cylinder Z-ditferential piston 3 assembly is replaced by the one illustrated in the Figs. 2 and 3, the other components of the device remaining identical.
  • the differential piston 3 is providedtherefore fixed.
  • the chamber 23 thus forms a mobile cylinder sliding on the fixed piston 24.
  • the chamber 23 is constantly connected to the chamber 14 by a duct 25 provided in the piston 3.
  • the lateral wall of the fixed piston is provided with a series of openings 18 arranged along a helix.
  • a rotary valve 26 fitted with an actuating handle 27.
  • This valve is provided with a longitudinal groove 28, which by a rotation of the handle 27 and of this valve, can bebrought to coincide at will with one or the other of the openings 18.
  • This groove is in constant communication with the duct 16 thanks to an axial hole 30 in the valve, as well as to an annular passage 31 provided in 24 and into which the duct 16 opens.
  • This step-by-step adjustment can be transformed into a continuous adjustment by replacing the arrangement according to Figs. 2 and 3 by the one according to Fig. 4.
  • the ditferential piston 3 is similar to the one of Fig. 2. It differs from it, however, by the fact that it is fitted on its left-hand face with a cylindrical axial prolongation 32 terminating at its free extremity by a surface 33 forming a helicoidal ramp.
  • the shape of the outlet opening of the duct 18 has no influence; it could be, instead of a simple hole, for instance a circular groove, or an opening having a special profile, allowing for instance the opening motion effected at high speed to be slowed down in the most eflicient way.
  • the devices illustrated imply a preliminary adjustment of the intermediate limit positions.
  • the control of this adjustment, indicated by the lever 27, can be effected from a remote point, for instance from the packing station, by means of auxiliary levers for instance.
  • this stoppage is produced by a simultaneous action on the inlet and on the outlet.
  • the device schematically illustrated in Fig. 5 comprises two feed pumps 6, 6a and six electro-magnetic valves 35 controlled by a multipolar switch 34 having four positions F, M, A, and B, which are homologous to the positions shown for the lever 9 (Fig. 1).
  • This switch thus plays the part of a control member in a fashion which is exactly similar to that of the lever 9 in the first embodiment.
  • the six valves 35 are supposed here to be of the same type and to interrupt the passage of the liquid in the duct on which they are placed, when they are excited.
  • the contacts which are open when the mobile member of the switch 34 is opposite to them have been represented by an unhatched rectangle 38, while the contacts which are closed under the same conditions are shown by hatched rectangles 37. It may thus be seen immediately which of the valves 35 are open and which are closed for each of the four positions F, M, A, B, of the multiple switch.
  • the diflerential piston 3 is provided with an axial boring in which penetrates in the fashion of a piston, a hollow rod 39 secured to the bottom of the cylinder 2.
  • the axial duct 40 is permanently connected to a duct 41 and temporarily to the chamber 13.
  • the extremity of the rod 40 coincides with an opening 42 of this piston.
  • a communication exists, through the opening 42 and the duct 40, between the chamber 13 and the duct '41, which is an inlet duct. Beyond this position (towards the left of the drawing) the communication between 13 and 41 is cut off by the rod 39 which then masks the opening 42.
  • This construction is distinguished from the preceding ones by the fact that the limitation of the opening motion of the tools is effected by the simultaneous cutting off of the outlet (out of the chamber 14, through the duct 16) in 18 by the piston '3, and of the inlet (into the chamber 13, through the duct 41) in 42, by means of the six valves '35 and of the switch 34.
  • the invention is not limited to the case where the opening motion of the tool-carriers is effected by acting on the escape (eventually simultaneously on the inlet) of the liquid from the cylinder 3. This limitation could also be effected by acting solely on the inlet.
  • control fluid is a liquid
  • the invention is not limited to this case.
  • the duct 22 might as well be fed with a gas (air) under pressure; the device would then be pneumatic and would operate practically in the same way as that described for the various examples given.
  • the device can be adapted to an automatic or semiautomatic control.
  • Apparatus for controlling the movement of a tool carrier comprising a differential piston and cylinder arrangement including a piston and a cylinder movable relative to each other and one of which is adapted to be coupled to said tool carrier, said piston dividing the cylinder into two chambers, a hydraulic system for supplying and receiving a pressure fluid to and from said chambers to control movement of said piston, and distributor means connecting said hydraulic system to said chambers and being adapted for coupling the hydraulic system to one of the chambers while isolating the other chamber, said piston and cylinder arrangement having a discharge opening arrangement enabling a movement of said piston towards said other chamber, said opening arrangement being closable by said piston whereby movement of the latter is terminated, said apparatus further comprising control means in said piston and cylinder arrangement for varying the position at which said piston closes the opening arrangement, said control means and discharge opening arrangement being adapted for operative engagement along a helix concentric with said cylinder whereby a relative rotation between the control means and opening arrangement controls the position at which the opening arrangement is closed.
  • said piston and cylinder arrangement comprises a hollow member aligned axially in said other chamber and defining said discharge opening arrangement in the form of at least one radial opening, said piston including a portion for slidingly engaging said member and obturating said radial opening, said portion being a helicoidal ramp, said piston and cylinder arrangement including means for rotating said member for aligning the radial opening with a selected portion of said ramp.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Reciprocating Pumps (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
US70935258 1957-01-29 1958-01-16 Device for limiting the opening stroke of a tool-carrier Expired - Lifetime US2986124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH864482X 1957-01-29

Publications (1)

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US2986124A true US2986124A (en) 1961-05-30

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Country Status (5)

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US (1) US2986124A (fr)
CH (1) CH333107A (fr)
DE (1) DE1082929B (fr)
FR (1) FR1197898A (fr)
GB (1) GB864482A (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120157A (en) * 1961-04-24 1964-02-04 Warner Swasey Co Fluid pressure drive system
US3391500A (en) * 1965-04-01 1968-07-09 Norton Co Fluid operated steady rest with automatic feed
WO1981000893A1 (fr) * 1979-09-28 1981-04-02 R Cemenska Mecanisme de commande hydraulique, bidirectionnel et a vitesses multiples
US4318333A (en) * 1979-09-28 1982-03-09 Caterpillar Tractor Co. Bidirectional, multiple speed hydraulic actuator
WO1998023865A1 (fr) * 1996-11-26 1998-06-04 Pos-Line Ab Actionneur pneumatique a mouvement alternatif et procede de mise en oeuvre
FR2805550A1 (fr) * 2000-02-29 2001-08-31 Anciens Ets Lucien Geismar Soc Unite de bourrage de ballast de voies de chemin de fer
CN102061646A (zh) * 2010-10-26 2011-05-18 浙江大学 一种捣固装置的液压激振系统
ES2644352A1 (es) * 2017-01-25 2017-11-28 Jose Antonio Ibañez Latorre Grupo de bateo para máquinas de mantenimiento ferroviario con capacidad de batear el balasto bajo las traviesas de la vía, tanto las simples como las dobles
CN113374744A (zh) * 2021-07-06 2021-09-10 中煤科工集团重庆研究院有限公司 一种带锁定功能的连续输送钻杆液压系统
CN113374746A (zh) * 2021-07-06 2021-09-10 中煤科工集团重庆研究院有限公司 一种同步连续输送钻杆液压系统
CN113374745A (zh) * 2021-07-06 2021-09-10 中煤科工集团重庆研究院有限公司 一种连续输送钻杆液压系统
CN113404731A (zh) * 2021-07-06 2021-09-17 中煤科工集团重庆研究院有限公司 一种带锁定功能的同步连续输送钻杆液压系统

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160174A (en) * 1961-03-28 1964-12-08 Parker Hannifin Corp Remote power shift circuits for spool valves and the like
DE1254661B (de) 1962-07-27 1967-11-23 Jackson Vibrators Fahrbare Gleisstopfmaschine
AT374217B (de) * 1982-07-07 1984-03-26 Plasser Bahnbaumasch Franz Gleisstopfaggregat mit wegbegrenzungs-anschlag
AT527175A1 (de) * 2023-04-18 2024-11-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Ansteuerung eines Stopfaggregats

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1004541A (en) * 1911-03-22 1911-09-26 Frederick E Martin Fluid-pressure control.
US1047146A (en) * 1911-09-09 1912-12-17 Alberto Balloco Service-motor operated by liquid for controlling mechanisms.
US1097983A (en) * 1911-05-01 1914-05-26 Rateau Steam Regenerator Company Steam-regenerator.
US1484030A (en) * 1923-01-30 1924-02-19 Kitchen John George Aulsebrook Means for controlling motion in fluid-pressure apparatus
US2171005A (en) * 1936-05-05 1939-08-29 Eclipse Aviat Corp Speed-responsive device
US2206771A (en) * 1939-11-24 1940-07-02 Jr Joseph J Dugas Operating valve for vacuum systems for controlling marine clutches
US2398997A (en) * 1943-02-22 1946-04-23 Gen Electric Variable-speed gear transmission
US2661724A (en) * 1951-07-17 1953-12-08 James P Guarnieri Inc Multiple position fluid pressure actuated apparatus
US2803379A (en) * 1955-10-24 1957-08-20 Union Oil Co Controlled liquid dispensing system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT182113B (de) * 1953-11-30 1955-05-25 Plasser Bahnbaumasch Franz Einrichtung bei Geleisstopfmaschinen zum gegenseitigen Verstellen paarweise angeordneter Stopfwerkzeuge

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1004541A (en) * 1911-03-22 1911-09-26 Frederick E Martin Fluid-pressure control.
US1097983A (en) * 1911-05-01 1914-05-26 Rateau Steam Regenerator Company Steam-regenerator.
US1047146A (en) * 1911-09-09 1912-12-17 Alberto Balloco Service-motor operated by liquid for controlling mechanisms.
US1484030A (en) * 1923-01-30 1924-02-19 Kitchen John George Aulsebrook Means for controlling motion in fluid-pressure apparatus
US2171005A (en) * 1936-05-05 1939-08-29 Eclipse Aviat Corp Speed-responsive device
US2206771A (en) * 1939-11-24 1940-07-02 Jr Joseph J Dugas Operating valve for vacuum systems for controlling marine clutches
US2398997A (en) * 1943-02-22 1946-04-23 Gen Electric Variable-speed gear transmission
US2661724A (en) * 1951-07-17 1953-12-08 James P Guarnieri Inc Multiple position fluid pressure actuated apparatus
US2803379A (en) * 1955-10-24 1957-08-20 Union Oil Co Controlled liquid dispensing system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120157A (en) * 1961-04-24 1964-02-04 Warner Swasey Co Fluid pressure drive system
US3391500A (en) * 1965-04-01 1968-07-09 Norton Co Fluid operated steady rest with automatic feed
WO1981000893A1 (fr) * 1979-09-28 1981-04-02 R Cemenska Mecanisme de commande hydraulique, bidirectionnel et a vitesses multiples
US4318333A (en) * 1979-09-28 1982-03-09 Caterpillar Tractor Co. Bidirectional, multiple speed hydraulic actuator
WO1998023865A1 (fr) * 1996-11-26 1998-06-04 Pos-Line Ab Actionneur pneumatique a mouvement alternatif et procede de mise en oeuvre
US6202536B1 (en) 1996-11-26 2001-03-20 Pos-Line Ab Pneumatic reciprocatory actuator and method of operating it
FR2805550A1 (fr) * 2000-02-29 2001-08-31 Anciens Ets Lucien Geismar Soc Unite de bourrage de ballast de voies de chemin de fer
EP1130164A1 (fr) * 2000-02-29 2001-09-05 Societe Des Anciens Etablissements L. Geismar Unité de bourrage de ballast de voies de chemin de fer
CN102061646A (zh) * 2010-10-26 2011-05-18 浙江大学 一种捣固装置的液压激振系统
ES2644352A1 (es) * 2017-01-25 2017-11-28 Jose Antonio Ibañez Latorre Grupo de bateo para máquinas de mantenimiento ferroviario con capacidad de batear el balasto bajo las traviesas de la vía, tanto las simples como las dobles
CN113374744A (zh) * 2021-07-06 2021-09-10 中煤科工集团重庆研究院有限公司 一种带锁定功能的连续输送钻杆液压系统
CN113374746A (zh) * 2021-07-06 2021-09-10 中煤科工集团重庆研究院有限公司 一种同步连续输送钻杆液压系统
CN113374745A (zh) * 2021-07-06 2021-09-10 中煤科工集团重庆研究院有限公司 一种连续输送钻杆液压系统
CN113404731A (zh) * 2021-07-06 2021-09-17 中煤科工集团重庆研究院有限公司 一种带锁定功能的同步连续输送钻杆液压系统
CN113374744B (zh) * 2021-07-06 2022-05-06 中煤科工集团重庆研究院有限公司 一种带锁定功能的连续输送钻杆液压系统
CN113404731B (zh) * 2021-07-06 2022-05-20 中煤科工集团重庆研究院有限公司 一种带锁定功能的同步连续输送钻杆液压系统

Also Published As

Publication number Publication date
CH333107A (fr) 1958-10-15
GB864482A (en) 1961-04-06
DE1082929B (de) 1960-06-09
FR1197898A (fr) 1959-12-03

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