ATE171695T1 - LIFTING UNIT FOR THE FORKS OF PALLET TRUCKS - Google Patents
LIFTING UNIT FOR THE FORKS OF PALLET TRUCKSInfo
- Publication number
- ATE171695T1 ATE171695T1 AT94200679T AT94200679T ATE171695T1 AT E171695 T1 ATE171695 T1 AT E171695T1 AT 94200679 T AT94200679 T AT 94200679T AT 94200679 T AT94200679 T AT 94200679T AT E171695 T1 ATE171695 T1 AT E171695T1
- Authority
- AT
- Austria
- Prior art keywords
- forks
- lifting unit
- piston
- pallet trucks
- chamber
- Prior art date
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
- B66F9/08—Masts; Guides; Chains
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Loading Or Unloading Of Vehicles (AREA)
- Actuator (AREA)
- Handcart (AREA)
Abstract
In a unit for lifting the forks of lift trucks using one or more single-acting hydraulic cylinders (19) to lift or lower the forks, in two opposite end-of-travel strokes of the piston (31) of the hydraulic cylinder (19), interception means (37, 34) determine a reduction in the cross-section of the working fluid outflow respectively from a first chamber (44) and from a second chamber (45) of variable volumes inside the hydraulic cylinder (19); this brakes the travel of the piston (31) and thus of the actuating rod (33), which is integral with the latter, preventing abrupt stresses being applied to the load on the forks. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI930528A IT1272114B (en) | 1993-03-19 | 1993-03-19 | FORK LIFTING UNITS IN FORKLIFTS |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE171695T1 true ATE171695T1 (en) | 1998-10-15 |
Family
ID=11365414
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT94200679T ATE171695T1 (en) | 1993-03-19 | 1994-03-16 | LIFTING UNIT FOR THE FORKS OF PALLET TRUCKS |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0622331B1 (en) |
AT (1) | ATE171695T1 (en) |
DE (1) | DE69413593T2 (en) |
ES (1) | ES2123704T3 (en) |
IT (1) | IT1272114B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19710556C2 (en) * | 1997-03-14 | 1999-03-11 | Jungheinrich Ag | Extendable mast construction for a pallet truck |
DE29707639U1 (en) | 1997-04-28 | 1997-08-21 | Still GmbH, 22113 Hamburg | Hydraulic cylinder with shock protection |
DE19802119A1 (en) * | 1998-01-21 | 1999-07-22 | Still Wagner Gmbh & Co Kg | Industrial truck with a lifting device |
US6557456B2 (en) | 2001-05-24 | 2003-05-06 | The Raymond Corporation | Cushioned actuator |
DE10214864C5 (en) * | 2002-04-04 | 2009-12-17 | Linde Material Handling Gmbh | Hydraulic cylinder with cushioning |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1414638A (en) * | 1964-11-25 | 1965-10-15 | Appalette | Adjustable hydraulic end-of-stroke shock absorber for plunger hydraulic cylinders |
FR2024747A1 (en) * | 1969-05-02 | 1970-09-04 | Lati Ste | |
US4006666A (en) * | 1975-05-22 | 1977-02-08 | Towmotor Corporation | Cushioning device for a hydraulic jack |
DE3146845A1 (en) * | 1981-11-26 | 1983-06-01 | Wabco Steuerungstechnik GmbH & Co, 3000 Hannover | DEVICE FOR STOPPING THE WORKING PISTON OF A DOUBLE-ACTING WORK CYLINDER |
US4476960A (en) * | 1982-08-09 | 1984-10-16 | Towmotor Corporation | Adjustable chain anchor for lift trucks |
CN1008201B (en) * | 1985-02-28 | 1990-05-30 | 株式会社丰田自动织机制作所 | Fluid-operated cyclinder with a cushioning flow rate control valve |
-
1993
- 1993-03-19 IT ITMI930528A patent/IT1272114B/en active IP Right Grant
-
1994
- 1994-03-16 ES ES94200679T patent/ES2123704T3/en not_active Expired - Lifetime
- 1994-03-16 DE DE69413593T patent/DE69413593T2/en not_active Expired - Fee Related
- 1994-03-16 AT AT94200679T patent/ATE171695T1/en active
- 1994-03-16 EP EP94200679A patent/EP0622331B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69413593D1 (en) | 1998-11-05 |
ITMI930528A0 (en) | 1993-03-19 |
ES2123704T3 (en) | 1999-01-16 |
DE69413593T2 (en) | 1999-03-18 |
ITMI930528A1 (en) | 1994-09-19 |
EP0622331A1 (en) | 1994-11-02 |
IT1272114B (en) | 1997-06-11 |
EP0622331B1 (en) | 1998-09-30 |
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