SE8800925L - DEVICE BY A PISTON IN A BOOKLIFT - Google Patents

DEVICE BY A PISTON IN A BOOKLIFT

Info

Publication number
SE8800925L
SE8800925L SE8800925A SE8800925A SE8800925L SE 8800925 L SE8800925 L SE 8800925L SE 8800925 A SE8800925 A SE 8800925A SE 8800925 A SE8800925 A SE 8800925A SE 8800925 L SE8800925 L SE 8800925L
Authority
SE
Sweden
Prior art keywords
piston
active
valve
channel
movement
Prior art date
Application number
SE8800925A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8800925D0 (en
SE461419B (en
Inventor
S Stenlund
J Baecklund
Original Assignee
Parator Ab
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 Parator Ab filed Critical Parator Ab
Priority to SE8800925A priority Critical patent/SE461419B/en
Publication of SE8800925D0 publication Critical patent/SE8800925D0/en
Priority to AU32934/89A priority patent/AU3293489A/en
Priority to PCT/SE1989/000133 priority patent/WO1989008785A1/en
Priority to EP19890903853 priority patent/EP0424389A1/en
Publication of SE8800925L publication Critical patent/SE8800925L/en
Publication of SE461419B publication Critical patent/SE461419B/en
Priority to FI904551A priority patent/FI92243C/en

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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/204—Control means for piston speed or actuating force without external control, e.g. control valve inside the piston

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Driven Valves (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A means at a first piston (1) with two active surfaces (1a, 1b) included in a bogie hoist or similar for movement by means of a pressurized driving medium (10) in two mutually opposite directions. The one active surface (1a) of the first piston (1) is elaborated larger than the other active surface (1b) of the first piston (1). A valve (4) is connected directly between the two active surfaces (1a, 1b) of the first piston (1). The said valve (4) in relation to a given differential pressure is arranged to open and close a channel (3) directly between the said active piston surfaces (1a, 1b). A shut-off valve (5) is also included, which in association with the one turning position of the movement of the first piston (1) is arranged to close the said channel (3).
SE8800925A 1988-03-15 1988-03-15 DEVICE BY A PISTON IN A BOOKLIFT SE461419B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE8800925A SE461419B (en) 1988-03-15 1988-03-15 DEVICE BY A PISTON IN A BOOKLIFT
AU32934/89A AU3293489A (en) 1988-03-15 1989-03-15 Control means for hoisting devices
PCT/SE1989/000133 WO1989008785A1 (en) 1988-03-15 1989-03-15 Control means for hoisting devices
EP19890903853 EP0424389A1 (en) 1988-03-15 1989-03-15 Valve means at a cylinder
FI904551A FI92243C (en) 1988-03-15 1990-09-14 Adjustment system for lifting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8800925A SE461419B (en) 1988-03-15 1988-03-15 DEVICE BY A PISTON IN A BOOKLIFT

Publications (3)

Publication Number Publication Date
SE8800925D0 SE8800925D0 (en) 1988-03-15
SE8800925L true SE8800925L (en) 1989-09-16
SE461419B SE461419B (en) 1990-02-12

Family

ID=20371693

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8800925A SE461419B (en) 1988-03-15 1988-03-15 DEVICE BY A PISTON IN A BOOKLIFT

Country Status (5)

Country Link
EP (1) EP0424389A1 (en)
AU (1) AU3293489A (en)
FI (1) FI92243C (en)
SE (1) SE461419B (en)
WO (1) WO1989008785A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617058A1 (en) * 1996-04-29 1997-10-30 Andreas Ing Grasl Compressed air cylinder for actuating smoke flaps in smoke and heat exhaust systems
US6071096A (en) * 1997-04-25 2000-06-06 Grasl; Andreas Pneumatic cylinder, in particular for actuating fume extraction valves in fume and heat extraction plants

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE396985B (en) * 1974-10-31 1977-10-10 Nordberg Carl Eric Bertil CONTROL DEVICE FOR ONE OR MORE IN A BOOK LIFT INCLUDING UNDERSTANDING HYDRAULIC PISTON
US4258609A (en) * 1977-10-11 1981-03-31 Conway John P Dual speed hydraulic piston assembly
US4375181A (en) * 1981-01-21 1983-03-01 Conway John P Hydraulic cylinder extending in three force modes

Also Published As

Publication number Publication date
SE8800925D0 (en) 1988-03-15
AU3293489A (en) 1989-10-05
SE461419B (en) 1990-02-12
FI92243C (en) 1994-10-10
EP0424389A1 (en) 1991-05-02
WO1989008785A1 (en) 1989-09-21
FI92243B (en) 1994-06-30
FI904551A0 (en) 1990-09-14

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