GB1221645A - Improvements in or relating to industrial trucks having a hydraulic circuit for performing a load handling operation - Google Patents

Improvements in or relating to industrial trucks having a hydraulic circuit for performing a load handling operation

Info

Publication number
GB1221645A
GB1221645A GB2938267A GB2938267A GB1221645A GB 1221645 A GB1221645 A GB 1221645A GB 2938267 A GB2938267 A GB 2938267A GB 2938267 A GB2938267 A GB 2938267A GB 1221645 A GB1221645 A GB 1221645A
Authority
GB
United Kingdom
Prior art keywords
solenoid
valve spool
switch
hand lever
circuit
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
GB2938267A
Inventor
Maxwell Sidney Fullbrook
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.)
Linde Material Handling UK Ltd
Original Assignee
Lansing Bagnall 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 Lansing Bagnall Ltd filed Critical Lansing Bagnall Ltd
Priority to GB2938267A priority Critical patent/GB1221645A/en
Priority to CH947968A priority patent/CH475146A/en
Priority to FR1571083D priority patent/FR1571083A/fr
Priority to DE19681756683 priority patent/DE1756683B2/en
Publication of GB1221645A publication Critical patent/GB1221645A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

1,221,645. Masked lift trucks. LANSING BAGNALL Ltd. 13 June, 1968 [26 June, 1967], No. 29382/67. Heading B8H. [Also in Division F2] In a masted lift truck, the spool of a directional valve 24 in the hydraulic circuit of a lift ram 14 is connected to a hand lever 34 by a linkage in which links 31, 32 are connected by the coil and armature of a solenoid 36. The hydraulic circuit is associated with an electrical circuit for energizing the solenoid whereby, when the electrical circuit is closed, the solenoid is energized and the links 31, 32 are movable in unison to move the valve spool to cause the ram 14 to be extended, and when a limit switch in the circuit opens, the solenoid is de-energized and a spring returns the valve spool to its neutral position. In the electrical circuit, there are provided two limit switches, one of which is normally open and arranged to be closed by movement of the hand lever 34 out of its neutral position, and the other of which 41 is mounted on the mast and is arranged to be closed when engaged by a cam block 46 on the lifting carriage 15. In operation, if the switch 41 is closed, closure of the other switch by downward movement of the hand lever will close the electrical circuit to energize the solenoid and the hydraulic pump motor. Further movement of the hand lever will then effect movement of the links 31, 32 to move the valve spool to the "lift" position. When the carriage opens the switch 41, the solenoid is de-energized, the valve spool returns to the neutral position and the pump motor will also be cut off. On moving the lever 34 upwardly, the link 32 moves towards the link 31 and then moves the link 31 to move the valve spool to move in the other direction to allow the carriage 15 to fall under gravity. A by-pass circuit, controlled by a switch 50 is provided for the limit switch 41. The hand lever 51 is rigidly connected to a valve spool in the hydraulic circuit of the tilt rams 18. In a modification (not shown), the limit switch 41 controls the range of movement of a side shifting attachment on the load carriage.
GB2938267A 1967-06-26 1967-06-26 Improvements in or relating to industrial trucks having a hydraulic circuit for performing a load handling operation Expired GB1221645A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2938267A GB1221645A (en) 1967-06-26 1967-06-26 Improvements in or relating to industrial trucks having a hydraulic circuit for performing a load handling operation
CH947968A CH475146A (en) 1967-06-26 1968-06-25 Industrial vehicle
FR1571083D FR1571083A (en) 1967-06-26 1968-06-25
DE19681756683 DE1756683B2 (en) 1967-06-26 1968-06-26 SAFETY DEVICE FOR THE LIFT OR OTHER HYDRAULIC MOVEMENT OF A LIFT LOADER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2938267A GB1221645A (en) 1967-06-26 1967-06-26 Improvements in or relating to industrial trucks having a hydraulic circuit for performing a load handling operation

Publications (1)

Publication Number Publication Date
GB1221645A true GB1221645A (en) 1971-02-03

Family

ID=10290677

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2938267A Expired GB1221645A (en) 1967-06-26 1967-06-26 Improvements in or relating to industrial trucks having a hydraulic circuit for performing a load handling operation

Country Status (4)

Country Link
CH (1) CH475146A (en)
DE (1) DE1756683B2 (en)
FR (1) FR1571083A (en)
GB (1) GB1221645A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU647897B2 (en) * 1991-04-01 1994-03-31 Mhi Sagami High Technology & Control Engineering Co., Ltd. A control device for forklift
WO2007109716A3 (en) * 2006-03-21 2008-01-10 Crown Equip Corp A control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle
EP1669320B2 (en) † 2004-12-10 2012-09-05 Still Sas Floor conveyor comprising a liftable device for picking up loads
CN110155750A (en) * 2019-07-03 2019-08-23 无锡宏盛智能装载技术有限公司 There is pallet cargo automatic loading and unloading vehicle device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2718641C2 (en) * 1977-04-27 1986-05-07 Mannesmann Rexroth GmbH, 8770 Lohr Control block with electrical switch-on and switch-off device for the hydraulic pump of electrically operated lifting vehicles
GB8601841D0 (en) * 1986-01-25 1986-02-26 Yale Materials Handling Ltd Vehicles
CN105220889A (en) * 2015-09-11 2016-01-06 方星 A kind of dust-proof construction work lifting appliance

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU647897B2 (en) * 1991-04-01 1994-03-31 Mhi Sagami High Technology & Control Engineering Co., Ltd. A control device for forklift
EP1669320B2 (en) † 2004-12-10 2012-09-05 Still Sas Floor conveyor comprising a liftable device for picking up loads
WO2007109716A3 (en) * 2006-03-21 2008-01-10 Crown Equip Corp A control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle
RU2450965C2 (en) * 2006-03-21 2012-05-20 Краун Эквипмент Корпорейшн Control lever mechanism
CN101405213B (en) * 2006-03-21 2012-06-20 克朗设备公司 A control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle
US8225693B2 (en) 2006-03-21 2012-07-24 Crown Equipment Corporation Control lever mechanism adapted to be mounted to a cowl of a materials handling vehicle
CN110155750A (en) * 2019-07-03 2019-08-23 无锡宏盛智能装载技术有限公司 There is pallet cargo automatic loading and unloading vehicle device
CN110155750B (en) * 2019-07-03 2023-12-01 无锡宏盛智能装载技术有限公司 Automatic loading and unloading machine for pallet goods

Also Published As

Publication number Publication date
FR1571083A (en) 1969-06-13
DE1756683A1 (en) 1970-04-30
DE1756683B2 (en) 1973-02-08
CH475146A (en) 1969-07-15

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