GB1247052A - Improvements in or relating to load lifting mechanisms - Google Patents
Improvements in or relating to load lifting mechanismsInfo
- 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
- 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
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Forklifts And Lifting Vehicles (AREA)
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).
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)
| 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)
| 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 (5)
| 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 |
| GB2603369B (en) * | 2019-09-20 | 2023-09-13 | 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 |
| CN115004894B (en) * | 2022-06-15 | 2023-12-19 | 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 |
|---|---|
| DE1781048B2 (en) | 1976-12-16 |
| DE1781048A1 (en) | 1971-02-11 |
| JPS4835549B1 (en) | 1973-10-29 |
| FR1576285A (en) | 1969-07-25 |
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