GB895171A - Control systems for industrial trucks - Google Patents

Control systems for industrial trucks

Info

Publication number
GB895171A
GB895171A GB19808/61A GB1980861A GB895171A GB 895171 A GB895171 A GB 895171A GB 19808/61 A GB19808/61 A GB 19808/61A GB 1980861 A GB1980861 A GB 1980861A GB 895171 A GB895171 A GB 895171A
Authority
GB
United Kingdom
Prior art keywords
traction
motors
battery
control
traction motors
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
GB19808/61A
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.)
Doosan Bobcat North America Inc
Original Assignee
Clark Equipment Co
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 Clark Equipment Co filed Critical Clark Equipment Co
Publication of GB895171A publication Critical patent/GB895171A/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)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

895,171. Control of D.C. motors; controllers. CLARK EQUIPMENT CO. May 9, 1960 [June 8, 1959], No. 19808/61. Divided out of 895,168. Drawings to Specification. Class 38 (3). The subject-matter of this Specification is identical with that described in Specification 895,168, but the claims relate to an industrial truck of the stand-up type having a pair of laterally-spaced traction wheels supporting one end of the truck, an electric traction motor associated with each wheel for driving same and an operator station located adjacent said wheels, a control system for said traction motors including a hand-operated control member located at the operator station and rotatable from a neutral position to control the speed of said traction motors, traction motor switching control means operatively connected to the hand-operated control member for controlling a preselected regime of traction motor speed as a function of the position of the hand-operated control-member out of the neutral position, switch means operatively connected in circuit with said traction motors and controlled by said speed control means and first and second battery means for energizing said traction motors, said circuit switch means being controlled to effect alternately at the selection of the operator series motor operation across said first battery means only, series motor operation across both said battery means, and parallel motor operation across both said battery means. Rectifiers maintain the current through the traction motors during the change-over from series to parallel. The return of the control member to the neutral position causes the traction motors to be connected initially to the other part of the battery during the next cycle of motor operation, so avoiding unequal discharge of the battery. When the motors are being accelerated, resistance is momentarily reintroduced into circuit to reduce current peaks. Specifications 818,457, 876,286, 895,170 and 895,172 also are referred to.
GB19808/61A 1959-06-08 1960-05-09 Control systems for industrial trucks Expired GB895171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US895171XA 1959-06-08 1959-06-08

Publications (1)

Publication Number Publication Date
GB895171A true GB895171A (en) 1962-05-02

Family

ID=22218069

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19808/61A Expired GB895171A (en) 1959-06-08 1960-05-09 Control systems for industrial trucks

Country Status (1)

Country Link
GB (1) GB895171A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539405A1 (en) * 1983-01-14 1984-07-20 Fenwick Manutention Ste Indle Materials handling car for a driver with a leg handicap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539405A1 (en) * 1983-01-14 1984-07-20 Fenwick Manutention Ste Indle Materials handling car for a driver with a leg handicap

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