US3574999A - System for controlling a tensioning carriage for a traction cable for an ingot truck - Google Patents

System for controlling a tensioning carriage for a traction cable for an ingot truck Download PDF

Info

Publication number
US3574999A
US3574999A US815480A US3574999DA US3574999A US 3574999 A US3574999 A US 3574999A US 815480 A US815480 A US 815480A US 3574999D A US3574999D A US 3574999DA US 3574999 A US3574999 A US 3574999A
Authority
US
United States
Prior art keywords
jack
liquid
cable
piston
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
Application number
US815480A
Other languages
English (en)
Inventor
Andre Nectoux
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.)
CREUSOT FORGES ATELIERS
SOC DES FORGES ET ATELIERS DU CREUSOT
Original Assignee
CREUSOT FORGES ATELIERS
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 CREUSOT FORGES ATELIERS filed Critical CREUSOT FORGES ATELIERS
Application granted granted Critical
Publication of US3574999A publication Critical patent/US3574999A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • B61B12/007—Cable tensioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G23/00—Driving gear for endless conveyors; Belt- or chain-tensioning arrangements
    • B65G23/44—Belt or chain tensioning arrangements
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/2053—Type of pump
    • F15B2211/20538—Type of pump constant capacity
    • 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
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41572—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and an output member
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41581—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a return line
    • 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
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • 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
    • F15B2211/40—Flow control
    • F15B2211/46—Control of flow in the return line, i.e. meter-out control
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/63—Electronic controllers
    • F15B2211/6303—Electronic controllers using input signals
    • F15B2211/6306—Electronic controllers using input signals representing a pressure
    • F15B2211/6309—Electronic controllers using input signals representing a pressure the pressure being a pressure source supply pressure
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/665—Methods of control using electronic components
    • F15B2211/6651—Control of the prime mover, e.g. control of the output torque or rotational speed
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • F15B2211/76—Control of force or torque of the output member
    • 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
    • F15B2211/8613—Control during or prevention of abnormal conditions the abnormal condition being oscillations
    • 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
    • F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
    • F15B2211/8636—Circuit failure, e.g. valve or hose failure

Definitions

  • This invention relates to steelworks installations provided with an ingot truck drawn by a cable.
  • the invention relates to the system for controlling the cable-tensioning carriage. It is characterized in that the said system comprises a hydraulic jack whose two elements, i.e.
  • cylinder and piston are respectively connected to a fixed part of the installation and attached to the tensioning carriage, one of the jack chambers communicating with a pressure circuit while the other chamber communicates with a liquid tank via two conduits each containing a valve which opens completely to supply the corresponding chamber and closes partially to allow liquid to escape from said chamber,-means for limiting the rate of flow being provided for such escape.
  • the invention relates to a system for controlling a tensioning carriage for a traction cable for an ingot truck.
  • the invention relates to a hydraulic system which acts on the movable carriage and provides cable tensioning and absorbs any oscillations, and this enables the conventional counterweights and the pit required for their movement to be eliminated.
  • the system comprises a hydraulic jack whose two elements, i.e. cylinder and piston, are respectively connected to a fixed part of the installation and attached to the tensioning carriage, one of the jack chambers communicating with a pressure circuit while the other chamber communicates with a liquid tank via two conduits each containing a valve which opens completely to supply the corresponding chamber and closes partially to allow liquid to escape from said chamber, means for limiting the rate of flow being provided for such escape.
  • FIG. I is a highly diagrammatic general view of an installation for the traction of an ingot truck comprising the system according to the invention.
  • FIG. 2 diagrammatically illustrates the jack for controlling the tensioning carriage and its hydraulic supply.
  • FIG. 1 illustrates an ingot truck 1 operated by an endless cable 2 passing over a positive'engagement drive pulley 3.
  • the endless cable 2 passes over a pulley 4 borne by a carriage 5 which is pulled to the right to provide tension on the traction cable 2. This tension is produced by a hydraulic jack 6.
  • the jack 6 and its supply system are shown in greater detail in FIG. 2.
  • the jack comprises a cylinder 6 with a piston 7 movable therein.
  • the piston rod 8 is attached by a link 9 to the carriage 5 while the cylinder 6 is connected to a fixed part of the installation.
  • the link 9 may have a number of apertures 10 for fixing to the carriage 5 in order to adjust the carriage distance and the cable tension, having regard to the position of the piston 7 inside the cylinder 6.
  • the cable 2 tends to elongate after a certain time and adjustment is necessary in this respect. This system thus enables use to be made of a jack having a reduced travel.
  • the jack 6 is fed by a hydraulic circuit.
  • the high-pressure chamber 11 of the jack communicates with a hydraulic accumulator 13 via conduit 12.
  • Pressure is maintained in the conduit 12 by a pump 14 which delivers to the conduit via a nonretum valve 15 which allows the conduit to be supplied withpressure liquid and prevents the pump 14 from being subjected to the liquid pressure when the pump is stopped.
  • the pump is fed with liquid from a tank 16 which is airtight and pressurized so that the pump 14 is regularly supplied from the liquid in the tank 16.
  • the pump I4 is started only when the liquid level in the accumulator 13 drops.
  • a level detector (or pressure detector depending on the type of accumulator) 17 is provided in combination with the accumulator 13. This detector results in the pump motor 18 starting when the level in the accumulator drops, and stops the motor 18 as soon as the level has returned to normal.
  • a pressostat 19 connected to conduit 12 completely stops the installation in the event of an abnormal pressure drop in the installation.
  • the chamber 20 of jack 6 communicates with the liquid tank I6 via conduit 21.
  • Each of the conduits I2 and 21 is provided with a box 22 and 23 respectively, containing a valve 24, 25 opening completely in the event of the liquid tending to penetrate into the corresponding chamber 11, 20.
  • the valves 24 and 25 partially close when the liquid tries to escape from the corresponding chamber.
  • valves 24 and 25 - are limited by adjustable points 26, 27, free adjustment being possible so that the leakage flow of the liquid from the jack chambers can be adjusted.
  • the installation is completed by a cock 28 in the conduit 21, by a conduit 29 connecting the two chambers 11 and 20 and containing a cock 30.
  • cock 30 is closed and cock 28 is open.
  • the pump 14 has supplied the circuit and more particularly the conduit 12 so that the chamber 11 is under pressure, .the piston 7 tends to move to the right and the carriage 5 tensions the cable 2.
  • Liquid arrives into the chamber 11 freely via the valve box 22, the valve 24 being completely open.
  • valve 25 partially closes, the escape being limited by the point 27. The leakage from chamber 20 is thus retarded and oscillation of the cable is thus eliminated.
  • valve 24 In the event of an oscillation tending to occur with the possibility of moving the piston 7 to the left, the valve 24 would partially close, the escape being limited by the point 26, and the liquid escaping from chamber 11 would be throttled by the valve 24 so that the oscillations would be practically eliminated.
  • the cock 28 can be closed and cock 30 opened.
  • a system for controlling a tensioning carriage for a trac tion cable for an ingot truck comprising a hydraulic jack, a cylinder and a piston therein for said jack, said cylinder being fixed and immovable, said piston being connected to the tensioning carriage, a jack chamber in said cylinder on each side of said piston, a pressure circuit opening into one of said jack chambers, a liquid tank, a conduit connecting said liquid tank to the other of said jack chambers, a valve in said pressure circuit, a valve in said conduit, said valves when open supplying fluid to the respective one of said jack chambers, and when partially closed allowing escape of liquid from the respective one of said jack chambers and limiting the rate of flow of escaping liquid, pump means supplying liquid under pressure to said pressure circuit from said liquid tank through a nonretum valve, a hydraulic accumulator in said pressure circuit, a liquid level detector in said accumulator, a motor driving said pump means and motor-starting means actuated by said level detector when the liquid level detector when

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Fluid-Pressure Circuits (AREA)
US815480A 1968-05-06 1969-04-11 System for controlling a tensioning carriage for a traction cable for an ingot truck Expired - Lifetime US3574999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR150649 1968-05-06

Publications (1)

Publication Number Publication Date
US3574999A true US3574999A (en) 1971-04-13

Family

ID=8649823

Family Applications (1)

Application Number Title Priority Date Filing Date
US815480A Expired - Lifetime US3574999A (en) 1968-05-06 1969-04-11 System for controlling a tensioning carriage for a traction cable for an ingot truck

Country Status (8)

Country Link
US (1) US3574999A (zh)
BE (1) BE729648A (zh)
CH (1) CH480108A (zh)
DE (1) DE1919566A1 (zh)
FR (1) FR1578917A (zh)
GB (1) GB1205196A (zh)
LU (1) LU58478A1 (zh)
NL (1) NL6906614A (zh)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2164759A1 (de) * 1971-12-13 1973-06-14 Bbc Brown Boveri & Cie Hydraulischer antrieb, insbesondere fuer elektrische schaltgeraete
US3799300A (en) * 1971-02-22 1974-03-26 Girling Ltd Hydraulic braking systems for vehicles
US4175342A (en) * 1972-01-28 1979-11-27 Goyo Ballast Company Ltd. Suction dredger
US4928487A (en) * 1982-05-10 1990-05-29 Mannesmann Rexroth Gmbh Control apparatus for double acting hydraulic cylinder units
US5074193A (en) * 1987-07-29 1991-12-24 Brunswick Corporation Marine power steering system
US5140895A (en) * 1989-10-18 1992-08-25 Aida Engineering Co., Ltd. Valve mechanism for controlling a pressure difference between an upper and a lower chamber of a hydraulic cylinder for a die cushion for a press
US5241894A (en) * 1987-07-29 1993-09-07 Brunswick Corporation Marine power steering system
US6070408A (en) * 1997-11-25 2000-06-06 Caterpillar Inc. Hydraulic apparatus with improved accumulator for reduced pressure pulsation and method of operating the same
US20060108190A1 (en) * 2004-11-11 2006-05-25 Zf Friedrichshafen Ag Vibration damper with adjustable damping force

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2637072C2 (de) * 1976-08-18 1978-09-14 Demag Ag, 4100 Duisburg Einrichtung für den Abtransport von Schopfenden in einer Mehrstranggießanlage, insbesondere in einer zweisträngigen Stahlbrammen-Stranggießanlage
US4470355A (en) * 1977-11-14 1984-09-11 Kunczynski Jan K Pneumatic cable tensioning apparatus and method for an aerial tramway or the like
DE3800689A1 (de) * 1988-01-13 1989-07-27 Becker Walter Gmbh Seilbahnmaschine, insbesondere fuer den bergbau
US5131528A (en) * 1991-01-22 1992-07-21 American Longwall Mining Corporation Conveyor apparatus with hydraulic tensioning control
AT400313B (de) * 1993-02-09 1995-12-27 Euroligna Masch Aggregate Seilsägevorrichtung mit einem fahrbaren oder verschiebbaren seilantrieb
CN103964134A (zh) * 2014-05-22 2014-08-06 成都海凌达机械有限公司 一种稳定调节托辊皮带张紧力的调节机构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB623228A (en) * 1947-02-21 1949-05-13 Oliver Baird Improvements relating to taking up slack in rope haulage systems
US2827763A (en) * 1955-05-20 1958-03-25 Jaroco Engineering Co Hydraulic system
US2861794A (en) * 1955-07-27 1958-11-25 Beck Cyrus Hydraulic springs
US3176466A (en) * 1961-12-01 1965-04-06 American Brake Shoe Co Hydraulic press
US3208728A (en) * 1962-11-19 1965-09-28 Exxon Production Research Co Apparatus for use on floating drilling platforms
US3309065A (en) * 1965-08-24 1967-03-14 Rucker Co Transloader
US3314657A (en) * 1965-08-23 1967-04-18 Rucker Co Hydropneumatic cable tensioner
US3395777A (en) * 1967-04-28 1968-08-06 Rodosta John Automobile lift

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB623228A (en) * 1947-02-21 1949-05-13 Oliver Baird Improvements relating to taking up slack in rope haulage systems
US2827763A (en) * 1955-05-20 1958-03-25 Jaroco Engineering Co Hydraulic system
US2861794A (en) * 1955-07-27 1958-11-25 Beck Cyrus Hydraulic springs
US3176466A (en) * 1961-12-01 1965-04-06 American Brake Shoe Co Hydraulic press
US3208728A (en) * 1962-11-19 1965-09-28 Exxon Production Research Co Apparatus for use on floating drilling platforms
US3314657A (en) * 1965-08-23 1967-04-18 Rucker Co Hydropneumatic cable tensioner
US3309065A (en) * 1965-08-24 1967-03-14 Rucker Co Transloader
US3395777A (en) * 1967-04-28 1968-08-06 Rodosta John Automobile lift

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3799300A (en) * 1971-02-22 1974-03-26 Girling Ltd Hydraulic braking systems for vehicles
DE2164759A1 (de) * 1971-12-13 1973-06-14 Bbc Brown Boveri & Cie Hydraulischer antrieb, insbesondere fuer elektrische schaltgeraete
US4175342A (en) * 1972-01-28 1979-11-27 Goyo Ballast Company Ltd. Suction dredger
US4928487A (en) * 1982-05-10 1990-05-29 Mannesmann Rexroth Gmbh Control apparatus for double acting hydraulic cylinder units
US5074193A (en) * 1987-07-29 1991-12-24 Brunswick Corporation Marine power steering system
US5241894A (en) * 1987-07-29 1993-09-07 Brunswick Corporation Marine power steering system
US5392690A (en) * 1987-07-29 1995-02-28 Brunswick Corporation Marine power steering system
US5140895A (en) * 1989-10-18 1992-08-25 Aida Engineering Co., Ltd. Valve mechanism for controlling a pressure difference between an upper and a lower chamber of a hydraulic cylinder for a die cushion for a press
US6070408A (en) * 1997-11-25 2000-06-06 Caterpillar Inc. Hydraulic apparatus with improved accumulator for reduced pressure pulsation and method of operating the same
US20060108190A1 (en) * 2004-11-11 2006-05-25 Zf Friedrichshafen Ag Vibration damper with adjustable damping force

Also Published As

Publication number Publication date
FR1578917A (zh) 1969-08-22
GB1205196A (en) 1970-09-16
DE1919566A1 (de) 1969-11-27
CH480108A (fr) 1969-10-31
LU58478A1 (zh) 1969-07-22
NL6906614A (zh) 1969-11-10
BE729648A (zh) 1969-08-18

Similar Documents

Publication Publication Date Title
US3574999A (en) System for controlling a tensioning carriage for a traction cable for an ingot truck
US3260508A (en) Balancing hoist
US5018631A (en) Hoist device for a load hanging on hoist ropes, in particular a container-crane
US4470355A (en) Pneumatic cable tensioning apparatus and method for an aerial tramway or the like
US3355993A (en) Drive balancing apparatus
US2154038A (en) Fluid pressure operated apparatus
US3266776A (en) Hydraulic winch with self-clamping jaws
US2718876A (en) Remote positioning means
US3455209A (en) Hydraulic control circuit
US1938758A (en) Spindle oscillator
US3618897A (en) Constant tensioning system
US3606854A (en) Apparatus for synchronizing movements in anchor cable and a load cable
NO752635L (zh)
GB809149A (en) Improvements in or relating to hydraulic operation of overhead crane carriages
US2767971A (en) Rotary tilting furnace
US3788491A (en) Apparatus for moving an object along a predetermined path
US2852127A (en) Portable extensible conveyor
KR20160123063A (ko) 선박용 유압식 윈치 구동장치
US2922401A (en) Hydraulic lifting device for tipping vehicles
US2875718A (en) Work holding device
GB2004248A (en) Hydraulic hoisting frame apparatus for floor conveying vehicles or shelf conveyors
US6276519B1 (en) Rodless cylinder rope tensioning apparatus
US1549883A (en) Valve mechanism for controlling the operation of two-pressure hydraulic presses
SU1050313A1 (ru) Механизм нат жени т гового органа горной машины
USRE26864E (en) Hydrostatic engine and sheave assembly