GB1355313A - Sunchronised control system for telescoping booms - Google Patents

Sunchronised control system for telescoping booms

Info

Publication number
GB1355313A
GB1355313A GB4908972A GB4908972A GB1355313A GB 1355313 A GB1355313 A GB 1355313A GB 4908972 A GB4908972 A GB 4908972A GB 4908972 A GB4908972 A GB 4908972A GB 1355313 A GB1355313 A GB 1355313A
Authority
GB
United Kingdom
Prior art keywords
lines
valves
fluid
rams
pressure
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
Application number
GB4908972A
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.)
Ruston-Bucyrus Ltd
Original Assignee
Ruston-Bucyrus Ltd
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 Ruston-Bucyrus Ltd filed Critical Ruston-Bucyrus Ltd
Publication of GB1355313A publication Critical patent/GB1355313A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Jib Cranes (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

1355313 Telescopic crane jibs RUSTONBUCYRUS Ltd 25 Oct 1972 [9 Nov 1971] 49089/72 Heading B8B [Also in Division F1] When a pair of rams 4, 11 are extended by pressure fluid supplied by a pump 19 through a line 24, their rates of extension are kept equal by a flow divider assembly 36 which meters proportional amounts of fluid out of the rod ends 7, 16 of the rams through lines 38, 39, and has pressure relief valves 42, 43 one of which opens to exhaust fluid from whichever of the rams is last to complete its stroke. Flow regulating valves 40, 41 are pilot controlled, to equalize the flow through lines 38, 39, by pilot lines 47, 46 respectively which sense the pressures in lines 39, 38. When one piston reaches the end of its stroke, flow of fluid from the other cylinder is throttled by one of valves 40, 41 thus causing a rise in pressure in one of lines 38, 39. At the preset pressure one of valves 42, 43 opens to connect one of lines 38, 39 to the reservoir. Valve 20 is manually operated and when fluid is supplied to the line 24 it passes first through check valves 29, 32 into cylinders 4, 11. Pressure from the lines 38, 39, acting through pilot lines 48, 49, subsequently opens valves 30, 33. The rams are described as being used to extend a telescopic boom, Fig. 1 (not shown).
GB4908972A 1971-11-09 1972-10-25 Sunchronised control system for telescoping booms Expired GB1355313A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19693471A 1971-11-09 1971-11-09

Publications (1)

Publication Number Publication Date
GB1355313A true GB1355313A (en) 1974-06-05

Family

ID=22727350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4908972A Expired GB1355313A (en) 1971-11-09 1972-10-25 Sunchronised control system for telescoping booms

Country Status (4)

Country Link
US (1) US3760688A (en)
JP (2) JPS4858551A (en)
CA (1) CA961371A (en)
GB (1) GB1355313A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7337885B2 (en) 2004-12-28 2008-03-04 Smc Corporation Of America Telescoping cylinder

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA763344B (en) * 1976-06-04 1978-01-25 Steel Eng Co Ltd Hydraulic rotary-percussive machines
US4248260A (en) * 1978-08-21 1981-02-03 Addison Carl E Control device for center pivot irrigation units
US4381036A (en) * 1980-06-05 1983-04-26 International Harvester Co. Planter height and marker control system
US4441651A (en) * 1982-10-29 1984-04-10 Jefferson Industries Company Hydraulic fan control
US4724930A (en) * 1985-03-25 1988-02-16 554072 Ontario Inc. Hydraulic lift
DE3626201A1 (en) * 1986-08-01 1988-02-04 Rexroth Mannesmann Gmbh HYDRAULIC CONTROL DEVICE FOR A SWEEPER ROLL OF A SWEEPER, HOLDED BY TWO CYLINDERS
US5012898A (en) * 1988-09-15 1991-05-07 Hunter Engineering Company Control system for vehicle lift racks
US6659531B2 (en) * 1998-10-28 2003-12-09 Timothy K. Searfoss Rebalancing circuit for a truck cover sliding pivot
ITMI20051256A1 (en) * 2005-07-04 2007-01-05 Auramo Oy HYDRAULIC GROUP TO CONTROL THE ARMS OF A CALIPER AND THE CALIPER INCLUDING THE HYDRAULIC GROUP
DE102009052977B4 (en) * 2009-11-12 2011-07-21 Roland Hörnstein GmbH & Co. KG, 72285 Hydraulic vehicle lift system
CN102287411A (en) * 2011-09-23 2011-12-21 徐州重型机械有限公司 Hydraulic control valve, dual-cylinder stretching system and high-altitude job engineering machine
CN104405733B (en) * 2014-09-19 2017-10-20 江苏大学 A kind of slider of bender balances electro-hydraulic servo synchronous control system
CN104454706A (en) * 2014-12-08 2015-03-25 西南铝业（集团）有限责任公司 Hydraulic control system for semi-continuous casting speed
KR102385239B1 (en) * 2020-06-19 2022-04-11 두산산업차량 주식회사 Forklift truck

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1831238A (en) * 1928-02-29 1931-11-10 Oilgear Co Multiple hydraulic drive
US2215169A (en) * 1937-05-26 1940-09-17 Automotive Prod Co Ltd Liquid pressure remote control system
US2374630A (en) * 1943-01-23 1945-04-24 Hydraulic Dev Corp Inc Twin-cylinder constant speed hydraulic system
FR914227A (en) * 1945-04-04 1946-10-02 Device for synchronizing two cylinders or an even number of cylinder pairs
US2938351A (en) * 1959-05-14 1960-05-31 Bickerstaff Inc Fluid pressure balancing valve
US3481489A (en) * 1967-12-05 1969-12-02 Robert E Stauffer Means for extending and retracting boom sections of a crane
US3506081A (en) * 1967-12-29 1970-04-14 Houdaille Industries Inc Wheel driving hydraulic motor circuits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7337885B2 (en) 2004-12-28 2008-03-04 Smc Corporation Of America Telescoping cylinder

Also Published As

Publication number Publication date
CA961371A (en) 1975-01-21
US3760688A (en) 1973-09-25
JPS5376469U (en) 1978-06-26
JPS4858551A (en) 1973-08-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee