GB1247052A – Improvements in or relating to load lifting mechanisms
– Google Patents
GB1247052A – Improvements in or relating to load lifting mechanisms
– Google Patents
Improvements in or relating to load lifting mechanisms
Info
Publication number
GB1247052A
GB1247052A
GB3859268A
GB3859268A
GB1247052A
GB 1247052 A
GB1247052 A
GB 1247052A
GB 3859268 A
GB3859268 A
GB 3859268A
GB 3859268 A
GB3859268 A
GB 3859268A
GB 1247052 A
GB1247052 A
GB 1247052A
Authority
GB
United Kingdom
Prior art keywords
mast section
ram
section
mast
movable
Prior art date
1967-08-15
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
GB3859268A
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.)
KNICKERBOCKER Co
Original Assignee
KNICKERBOCKER 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.)
1967-08-15
Filing date
1968-08-13
Publication date
1971-09-22
1968-08-13
Application filed by KNICKERBOCKER Co
filed
Critical
KNICKERBOCKER Co
1968-08-13
Priority to GB1099171A
priority
Critical
patent/GB1247053A/en
1971-09-22
Publication of GB1247052A
publication
Critical
patent/GB1247052A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
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
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
B66F9/12—Platforms; Forks; Other load supporting or gripping members
B66F9/16—Platforms; Forks; Other load supporting or gripping members inclinable relative to mast
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
B66F9/205—Arrangements for transmitting pneumatic, hydraulic or electric power to movable parts or devices
Abstract
1,247,052. Masted lift trucks; counterbalancing. KNICKERBOCKER CO. 13 Aug., 1968 [15 Aug., 1967], No. 38592/68. Headings B8B and B8H. The bending moment created by a load on the forks of a mast assembly is counterbalanced by a bending moment produced by chains of the assembly acting on rearwardly projecting arms on the upper mast section. As shown in Fig. 2, a mast assembly comprises a lifting carriage 42 guided on an upper mast section 40 which is guided in a bracket 102 on the lifting ram piston rod 60 and is also guided by the lower fixed mast section 34 when lowered from the position shown. The cylinder 56 of the ram is guided by rollers 90, 92 for movement on the fixed mast section. The movable mast section 40 is raised, on extension of the ram, by chains 62 anchored to the mast section 40 and to the ram cylinder 56 and passing over pulleys 80 on the piston-rod. Chains 58, anchored to the lifting carriage 42 and to the fixed mast section 34, pass around pulleys 70, 72, on cantilever arms 64 secured to the movable mast section, around pulleys 74, 76, on cantilever arms 68 secured to the fixed mast section, and under pulleys 78 mounted on the ram cylinder 56. In operation, on extending the ram from its retracted position, Fig. 5 (not shown), the lifting carriage and movable mast section rise until the carriage engages a stop at the top of the movable section, Fig. 3 (not shown), whereafter, continued extension of the ram causes the ram cylinder to rise on the fixed mast section and the movable mast section to rise out of engagement with the fixed section to the fully raised position shown in Fig. 2. The fork arms 66 are supported on a plate 302 which is connected by pivoted links 294, 296 to the lifting carriage 266, rams 322 being provided for tilting the fork between the positions shown in Fig. 22, as described in Specification 1,247,053. Alternative mast constructions are described with reference to Figs. 23-26 (not shown).
GB3859268A
1967-08-15
1968-08-13
Improvements in or relating to load lifting mechanisms
Expired
GB1247052A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB1099171A
GB1247053A
(en)
1967-08-15
1968-08-13
Improvements in or relating to tilting mechanisms for load carriers on lifting trucks
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US66063067A
1967-08-15
1967-08-15
Publications (1)
Publication Number
Publication Date
GB1247052A
true
GB1247052A
(en)
1971-09-22
Family
ID=24650311
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3859268A
Expired
GB1247052A
(en)
1967-08-15
1968-08-13
Improvements in or relating to load lifting mechanisms
Country Status (3)
Country
Link
JP
(1)
JPS4835549B1
(en)
FR
(1)
FR1576285A
(en)
GB
(1)
GB1247052A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO2021053317A1
(en)
*
2019-09-20
2021-03-25
M J Products Ltd
Load handling apparatus
CN115004894A
(en)
*
2022-06-15
2022-09-06
山东弘宇农机股份有限公司
Double-cylinder hydraulic lifter for tractor
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2815024C2
(en)
*
1978-04-07
1986-05-07
O & K Orenstein & Koppel Ag, 1000 Berlin
Clamping and working distance compensation arrangement for hydraulic hoses on lift masts of forklifts
FR2584696A1
(en)
*
1985-07-11
1987-01-16
Prat Cie Ets A
Forklift truck
US4949816A
(en)
*
1988-11-03
1990-08-21
Clark Equipment Company
Upright for lift truck
1968
1968-08-13
GB
GB3859268A
patent/GB1247052A/en
not_active
Expired
1968-08-14
FR
FR1576285D
patent/FR1576285A/fr
not_active
Expired
1968-08-15
JP
JP43058233A
patent/JPS4835549B1/ja
active
Pending
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO2021053317A1
(en)
*
2019-09-20
2021-03-25
M J Products Ltd
Load handling apparatus
GB2603369A
(en)
*
2019-09-20
2022-08-03
M J Products Ltd
Load handling apparatus
CN115004894A
(en)
*
2022-06-15
2022-09-06
山东弘宇农机股份有限公司
Double-cylinder hydraulic lifter for tractor
Also Published As
Publication number
Publication date
DE1781048A1
(en)
1971-02-11
JPS4835549B1
(en)
1973-10-29
FR1576285A
(en)
1969-07-25
DE1781048B2
(en)
1976-12-16
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None