GB2118250A - Fluid flow control system for an extensible jack - Google Patents

Fluid flow control system for an extensible jack

Info

Publication number
GB2118250A
GB2118250A GB08232352A GB8232352A GB2118250A GB 2118250 A GB2118250 A GB 2118250A GB 08232352 A GB08232352 A GB 08232352A GB 8232352 A GB8232352 A GB 8232352A GB 2118250 A GB2118250 A GB 2118250A
Authority
GB
United Kingdom
Prior art keywords
jack
control system
flow control
fluid flow
fluid
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.)
Granted
Application number
GB08232352A
Other versions
GB2118250B (en
Inventor
Jesse L Field
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.)
Caterpillar Industrial Inc
Original Assignee
Towmotor Corp
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 Towmotor Corp filed Critical Towmotor Corp
Publication of GB2118250A publication Critical patent/GB2118250A/en
Application granted granted Critical
Publication of GB2118250B publication Critical patent/GB2118250B/en
Expired 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
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/08—Masts; Guides; Chains
    • 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
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
    • F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent actuator

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

Fluid flow control system (10, 210) for a multi-stage fluid operated jack (16, 216) which eliminates the problems of jack sequencing and speed control. The flow control system (10, 210) has a source of pressurized fluid (72, 74, 272, 274), a multi-stage fluid operated jack (16, 216), a sensor (79, 279) and a valve (62, 262). The sensor (79, 279) is actuatable in response to the jack (16, 216) being at a preselected elevated position to shift the valve (62, 262) and change the rate of flow delivered from the source (72, 74, 272, 274) to the jack (16, 216) from a first preselected maximum limited flow rate to a second preselected maximum limited flow rate. Therefore, the speed of extension and sequencing of the various stages of the jack can be automatically controlled. Thus, the fluid flow control system eliminates expensive and complicated jack construction, expensive and complicated valving and reduces the problems of speed control and jack missequencing. The fluid flow control system is particularly useful in a full free lift mast.
GB08232352A 1981-07-30 1981-07-30 Fluid flow control system for an extensible jack Expired GB2118250B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1981/001022 WO1983000542A1 (en) 1981-07-30 1981-07-30 Fluid flow control system for an extensible jack

Publications (2)

Publication Number Publication Date
GB2118250A true GB2118250A (en) 1983-10-26
GB2118250B GB2118250B (en) 1984-08-22

Family

ID=22161341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08232352A Expired GB2118250B (en) 1981-07-30 1981-07-30 Fluid flow control system for an extensible jack

Country Status (2)

Country Link
GB (1) GB2118250B (en)
WO (1) WO1983000542A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103671347A (en) * 2013-12-12 2014-03-26 北京二七轨道交通装备有限责任公司 Hydraulic oil cylinder
US9850923B2 (en) 2015-01-20 2017-12-26 Brookefield Hunter, Inc. Fluid flow regulator

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3188917A (en) * 1962-08-10 1965-06-15 Yale & Towne Inc Telescoping lift ram
US3653208A (en) * 1970-06-26 1972-04-04 Philip A Kubik Fluid system
CA1081421A (en) * 1975-01-31 1980-07-15 Toyoaki Ueno Method of injecting a molten material under pressure and an apparatus performing the same
US4008648A (en) * 1975-11-11 1977-02-22 Cascade Corporation Telescopic ram
US4112823A (en) * 1975-12-17 1978-09-12 Carrier Corporation Methods and apparatus for controlling an hydraulic cylinder
JPS5819383B2 (en) * 1977-02-15 1983-04-18 東芝機械株式会社 injection molding equipment
US4191092A (en) * 1977-11-16 1980-03-04 Cascade Corporation Telescopic ram

Also Published As

Publication number Publication date
WO1983000542A1 (en) 1983-02-17
GB2118250B (en) 1984-08-22

Similar Documents

Publication Publication Date Title
EP0232014A3 (en) Energy-conserving servomechanisms
DK410485D0 (en) HYDRAULIC CONTROL
GB1469918A (en) Fast exhaust circuit for hydraulic jacks
ES8307173A1 (en) A steering system.
GB2118250A (en) Fluid flow control system for an extensible jack
EP0056514A3 (en) Hydraulic control system
JPS646501A (en) Control apparatus for load sensing hydraulic drive circuit
GB1431641A (en) Valve mechanism
DE3684402D1 (en) HYDRAULIC CONTROL DEVICE.
ATE80587T1 (en) HYDRAULICALLY ACTUATED STEERING DEVICE.
EP0077203A3 (en) Fluid flow control valve
EP0365341A3 (en) Automatic speed control
JPS5722998A (en) Remote controller of bowthruster and method of automatically steering ship to fixed direction
NO883766L (en) PRESSURE ACTIVABLE FLOW CONTROL VALVE.
JPS5524210A (en) Hydraulic driving apparatus
FR2389021A1 (en) Load handling equipment hydraulic control circuit - has safety valve with closing piston operated by two sensors in series
EP0019597A3 (en) Safety device for hydraulic circuits
JPS549371A (en) Directional and flow control valve with pressure compensation
JPS5260387A (en) Working fluid control system
GB1303487A (en)
JPS5690158A (en) Slewing drive controller
GB2001516A (en) Control valve
FR2334861A1 (en) Hydraulic system with control and bypass valve - has pump-driven servo with collecting tank and discharge valve
DE69803559T2 (en) DEVICE FOR REGULATING A FLUID FLOW
JPS6480204A (en) Control device for position of working machine based on ground

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee