GB1197167A

GB1197167A – Lift Trucks
– Google Patents

GB1197167A – Lift Trucks
– Google Patents
Lift Trucks

Info

Publication number
GB1197167A

GB1197167A
GB530969A
GB530969A
GB1197167A
GB 1197167 A
GB1197167 A
GB 1197167A
GB 530969 A
GB530969 A
GB 530969A
GB 530969 A
GB530969 A
GB 530969A
GB 1197167 A
GB1197167 A
GB 1197167A
Authority
GB
United Kingdom
Prior art keywords
lift
ram
variable resistor
circuit
speed
Prior art date
1968-03-26
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
GB530969A
Inventor
Henry J Thomas
George Joseph Trusock
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.)

CKARK EQUIPMENT Co

Original Assignee
CKARK 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.)
1968-03-26
Filing date
1969-01-31
Publication date
1970-07-01

1969-01-31
Application filed by CKARK EQUIPMENT Co
filed
Critical
CKARK EQUIPMENT Co

1970-07-01
Publication of GB1197167A
publication
Critical
patent/GB1197167A/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

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T137/00—Fluid handling

Y10T137/7287—Liquid level responsive or maintaining systems

Y10T137/7313—Control of outflow from tank

Y10T137/7323—By float

Y10T137/7326—Low level safety cut-off

Abstract

1,197,167. Masted lift trucks. CLARK EQUIPMENT CO. 31 Jan., 1969 [26 March, 1968], No. 5309/69. Heading B8H. [Also in Division B7] The electric control circuit for the drive motor 19 of a masked lift truck includes a variable resistor 48 which is coupled to the hydraulic lift ram circuit whereby the speed of the motor 19 is reduced as the mast is extended. The electric circuit also includes a switch 50, which opens when the mast assembly is extended to a predetermined height, a pulse control unit 44 and a variable resistor 40 which is manually controlled by the operator on a platform which rises with the lifting carriage. The variable resistor 48 is coupled to a float Figs. 4, 5 (not shown), in the fluid reservoir of the lift ram whereby, as the level of fluid falls on extension of the lift ram, the resistance is increased. The hydraulic circuit, Fig. 3 (not shown), includes two pumps in parallel, to provide two-speed extension of the lift ram, and the return line to the reservoir includes a flowrestrictor and a by-pass therefor to provide two-speed retraction of the ram under the action of gravity.

GB530969A
1968-03-26
1969-01-31
Lift Trucks

Expired

GB1197167A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US71624068A

1968-03-26
1968-03-26

Publications (1)

Publication Number
Publication Date

GB1197167A
true

GB1197167A
(en)

1970-07-01

Family
ID=24877287
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB530969A
Expired

GB1197167A
(en)

1968-03-26
1969-01-31
Lift Trucks

Country Status (5)

Country
Link

US
(1)

US3524522A
(en)

BE
(1)

BE727614A
(en)

DE
(1)

DE1912924A1
(en)

FR
(1)

FR2004705A1
(en)

GB
(1)

GB1197167A
(en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3756350A
(en)

*

1971-03-01
1973-09-04
Hyster Co
Materials handling truck

US4265337A
(en)

*

1979-07-16
1981-05-05
Crown Controls Corporation
Fork lift truck speed control dependent upon fork elevation

US4598797A
(en)

*

1984-04-13
1986-07-08
Clark Equipment Company
Travel/lift inhibit control

US5890562A
(en)

*

1996-08-16
1999-04-06
Bt Prime Mover, Inc.
Control console for material handling vehicle

DE112006002080T5
(en)

*

2005-08-04
2008-07-17
OSKO FORKLIFTS PTY LTD, Dudley Park

Freely movable material transport trolley or cart in modular design

US8230976B2
(en)

*

2008-04-16
2012-07-31
The Raymond Corporation
Pallet truck with calculated fork carriage height

Family Cites Families (5)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US1267742A
(en)

*

1915-08-18
1918-05-28
Mercury Mfg Co
Regulator for draft-vehicles.

US1707657A
(en)

*

1925-12-07
1929-04-02
Standard Oil Co
Liquid-meter device for tank trucks

US2691385A
(en)

*

1949-06-09
1954-10-12
Carrie Asbeck
Safety valve for hydraulic brakes

US2790513A
(en)

*

1956-07-10
1957-04-30
Elwell Parker Electric Co
Control circuit for industrial lift trucks

US2935161A
(en)

*

1957-11-07
1960-05-03
Allis Chalmers Mfg Co
Safety system for load elevating vehicles

1968

1968-03-26
US
US3524522D
patent/US3524522A/en
not_active
Expired – Lifetime

1969

1969-01-29
BE
BE727614D
patent/BE727614A/xx
unknown

1969-01-29
FR
FR6901783A
patent/FR2004705A1/fr
not_active
Withdrawn

1969-01-31
GB
GB530969A
patent/GB1197167A/en
not_active
Expired

1969-03-14
DE
DE19691912924
patent/DE1912924A1/en
active
Pending

Also Published As

Publication number
Publication date

DE1912924A1
(en)

1969-10-16

FR2004705A1
(en)

1969-11-28

BE727614A
(en)

1969-07-01

US3524522A
(en)

1970-08-18

Similar Documents

Publication
Publication Date
Title

GB1261295A
(en)

1972-01-26

Hydraulic circuits

SE7416063L
(en)

1975-06-23

GB1026411A
(en)

1966-04-20

Improvements in or relating to industrial trucks

GB1197167A
(en)

1970-07-01

Lift Trucks

GB1203404A
(en)

1970-08-26

Lift truck control

US3774726A
(en)

1973-11-27

Safety system for a lift truck

GB1061221A
(en)

1967-03-08

Improvements in or relating to fork-lift trucks

GB1072375A
(en)

1967-06-14

Lifting platforms for automobiles

GB1063843A
(en)

1967-03-30

Improvements in or relating to lift trucks

ES443042A1
(en)

1977-04-01

Lifting and loading device for use in combination with a power driven lift truck

US3485391A
(en)

1969-12-23

Lift truck with extendable and retractable load supporting means

GB987637A
(en)

1965-03-31

Improvements in or relating to industrial lift trucks

GB1198184A
(en)

1970-07-08

Improvements in Lifting Platforms

ES408586A1
(en)

1975-11-01

Loading platform assembly for lorries

GB1173735A
(en)

1969-12-10

Lift Truck

GB1371744A
(en)

1974-10-23

On-board container-lifting appliance for aircraft

GB1074910A
(en)

1967-07-05

Fork lift truck

GB1103603A
(en)

1968-02-21

Power driven truck provided with an operating platform and load lifting platforms

GB1481101A
(en)

1977-07-27

Truck having extensible reach mechanism

FR2261217A1
(en)

1975-09-12

Battery powered fork lift truck – moves load from overhung position to one directly above it for travelling

GB1292056A
(en)

1972-10-11

Improvements in industrial lift trucks

GB1100998A
(en)

1968-01-31

Improvements in or relating to load-handling vehicles

GB1407286A
(en)

1975-09-24

Industrial lift trucks

GB1236442A
(en)

1971-06-23

Improvements in load raising and lowering devices

GB1092281A
(en)

1967-11-22

Improvements in fork-lift reach trucks

Legal Events

Date
Code
Title
Description

1970-11-11
PS
Patent sealed [section 19, patents act 1949]

1981-09-16
PCNP
Patent ceased through non-payment of renewal fee

Download PDF in English

None