GB1117603A – Hydraulic apparatus suitable for raising and lowering a load
– Google Patents
GB1117603A – Hydraulic apparatus suitable for raising and lowering a load
– Google Patents
Hydraulic apparatus suitable for raising and lowering a load
Info
Publication number
GB1117603A
GB1117603A
GB39319/64A
GB3931964A
GB1117603A
GB 1117603 A
GB1117603 A
GB 1117603A
GB 39319/64 A
GB39319/64 A
GB 39319/64A
GB 3931964 A
GB3931964 A
GB 3931964A
GB 1117603 A
GB1117603 A
GB 1117603A
Authority
GB
United Kingdom
Prior art keywords
pump
ram
hand lever
sept
actuated
Prior art date
1964-09-26
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
GB39319/64A
Inventor
John Christopher Eglingt Flint
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.)
Dowty Technical Developments Ltd
Original Assignee
Dowty Technical Developments 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.)
1964-09-26
Filing date
1964-09-26
Publication date
1968-06-19
1964-09-26
Application filed by Dowty Technical Developments Ltd
filed
Critical
Dowty Technical Developments Ltd
1964-09-26
Priority to GB39319/64A
priority
Critical
patent/GB1117603A/en
1965-09-22
Priority to US489195A
priority
patent/US3338441A/en
1968-06-19
Publication of GB1117603A
publication
Critical
patent/GB1117603A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
B66F9/20—Means for actuating or controlling masts, platforms, or forks
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
B66F9/20—Means for actuating or controlling masts, platforms, or forks
B66F9/22—Hydraulic devices or systems
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
F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
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
F15B2211/20546—Type of pump variable 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
F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
F15B2211/205—Systems with pumps
F15B2211/20576—Systems with pumps with multiple pumps
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
F15B2211/27—Directional control by means of the pressure source
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
F15B2211/3105—Neutral or centre positions
F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
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
F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
F15B2211/7107—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being mechanically linked
Abstract
1,117,603. Masked lift trucks. DOWTY TECHNICAL DEVELOPMENTS Ltd. 17 Sept., 1965 [26 Sept., 1964], No. 39319/64. Heading B8H. [Also in Division F1] The hydraulic system of a fork lift truck comprises a single-acting lift ram 20, actuated by a variable-delivery pump 12, and a doubleacting mast-tilting ram 30 actuated by a fixeddelivery pump 13, the two pumps being driven by an electric motor 14. A hand lever 17 is provided for controlling the pump 12 and a hand lever 26 is provided for controlling a control valve 25. In a modification, a lock valve 41 is provided in the line from the output side of the pump 12 to the ram 20 and an automatic release linkage 42 is provided between the valve 41 and the hand lever 17. A further hydraulic circuit, including a ram actuating a reach mechanism for the load support, may be coupled to the fixed-delivery pump.
GB39319/64A
1964-09-26
1964-09-26
Hydraulic apparatus suitable for raising and lowering a load
Expired
GB1117603A
(en)
Priority Applications (2)
Application Number
Priority Date
Filing Date
Title
GB39319/64A
GB1117603A
(en)
1964-09-26
1964-09-26
Hydraulic apparatus suitable for raising and lowering a load
US489195A
US3338441A
(en)
1964-09-26
1965-09-22
Hydraulic apparatus
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB39319/64A
GB1117603A
(en)
1964-09-26
1964-09-26
Hydraulic apparatus suitable for raising and lowering a load
Publications (1)
Publication Number
Publication Date
GB1117603A
true
GB1117603A
(en)
1968-06-19
Family
ID=10408926
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB39319/64A
Expired
GB1117603A
(en)
1964-09-26
1964-09-26
Hydraulic apparatus suitable for raising and lowering a load
Country Status (2)
Country
Link
US
(1)
US3338441A
(en)
GB
(1)
GB1117603A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0812799A1
(en)
*
1996-06-14
1997-12-17
Still Wagner GmbH & Co. KG
Control element for industrial truck guided by a towbar
DE102006060351B3
(en)
*
2006-12-20
2008-04-10
Sauer-Danfoss Gmbh & Co Ohg
Hydraulic circuit arrangement for battery-driven industrial truck, has priority valve arranged to distribute volume flow flowing from pump to cylinder and load, and motor and pumps designed as motor-dual pump assembly
CN111608976A
(en)
*
2020-04-29
2020-09-01
浙江科力车辆控制系统有限公司
Hydraulic lifting system for electric commercial vehicle
Families Citing this family (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3754394A
(en)
*
1971-12-02
1973-08-28
Hyster Co
Hydraulic control system for electric lift truck
DE3237019C2
(en)
*
1981-10-07
1994-07-28
Linde Ag
Lift truck with a steering system with hydrostatic power steering system
US4809586A
(en)
*
1987-09-11
1989-03-07
Deere & Company
Hydraulic system for a work vehicle
US8001751B2
(en)
*
2007-09-14
2011-08-23
Cnh America Llc
Method for gradually relieving pressure in a hydraulic system utilizing reverse fluid flow through a pump of the system
CN109231086A
(en)
*
2018-10-18
2019-01-18
合肥搬易通科技发展有限公司
A kind of pallet stacking car hydraulic system of certain time interior control clamping force size
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2008687A
(en)
*
1934-03-08
1935-07-23
Walter C Dean
Automatic tension winch
US2389164A
(en)
*
1944-09-11
1945-11-20
Payne William Harvey
Mechanism for supporting and automatically adjusting arc furnace electrodes
US2914922A
(en)
*
1956-04-06
1959-12-01
Unitron Corp
Hydraulic system for extending and retracting an antenna mast or the like
US3146593A
(en)
*
1960-04-18
1964-09-01
Parker Hannifin Corp
Dual pump system and control valve assembly therefor
US3163008A
(en)
*
1963-04-09
1964-12-29
Elmer K Hansen
Hydraulic drive system
US3219259A
(en)
*
1963-10-21
1965-11-23
Yale & Towne Inc
Vacuum supply system for industrial truck
1964
1964-09-26
GB
GB39319/64A
patent/GB1117603A/en
not_active
Expired
1965
1965-09-22
US
US489195A
patent/US3338441A/en
not_active
Expired – Lifetime
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0812799A1
(en)
*
1996-06-14
1997-12-17
Still Wagner GmbH & Co. KG
Control element for industrial truck guided by a towbar
DE102006060351B3
(en)
*
2006-12-20
2008-04-10
Sauer-Danfoss Gmbh & Co Ohg
Hydraulic circuit arrangement for battery-driven industrial truck, has priority valve arranged to distribute volume flow flowing from pump to cylinder and load, and motor and pumps designed as motor-dual pump assembly
DE102006060351B8
(en)
*
2006-12-20
2008-07-24
Sauer-Danfoss Gmbh & Co Ohg
Hydraulic circuit with energy recovery
CN111608976A
(en)
*
2020-04-29
2020-09-01
浙江科力车辆控制系统有限公司
Hydraulic lifting system for electric commercial vehicle
CN111608976B
(en)
*
2020-04-29
2022-09-16
浙江科力车辆控制系统有限公司
Hydraulic lifting system for electric commercial vehicle
Also Published As
Publication number
Publication date
US3338441A
(en)
1967-08-29
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