ATE171695T1 - LIFTING UNIT FOR THE FORKS OF PALLET TRUCKS - Google Patents

LIFTING UNIT FOR THE FORKS OF PALLET TRUCKS

Info

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
Application number
AT94200679T
Other languages
German (de)
Inventor
Luigi Santamaria
Original Assignee
Fiat Om Carrelli Elevatori
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 Fiat Om Carrelli Elevatori filed Critical Fiat Om Carrelli Elevatori
Application granted granted Critical
Publication of ATE171695T1 publication Critical patent/ATE171695T1/en

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>
AT94200679T 1993-03-19 1994-03-16 LIFTING UNIT FOR THE FORKS OF PALLET TRUCKS ATE171695T1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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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