SE8800925D0 - DEVICE BY A PISTON IN A BOOKLIFT - Google Patents
DEVICE BY A PISTON IN A BOOKLIFTInfo
- Publication number
- SE8800925D0 SE8800925D0 SE8800925A SE8800925A SE8800925D0 SE 8800925 D0 SE8800925 D0 SE 8800925D0 SE 8800925 A SE8800925 A SE 8800925A SE 8800925 A SE8800925 A SE 8800925A SE 8800925 D0 SE8800925 D0 SE 8800925D0
- Authority
- SE
- Sweden
- Prior art keywords
- piston
- active
- valve
- channel
- movement
- Prior art date
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).
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 true SE8800925D0 (en) | 1988-03-15 |
SE8800925L 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)
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)
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 |
-
1988
- 1988-03-15 SE SE8800925A patent/SE461419B/en not_active IP Right Cessation
-
1989
- 1989-03-15 AU AU32934/89A patent/AU3293489A/en not_active Abandoned
- 1989-03-15 WO PCT/SE1989/000133 patent/WO1989008785A1/en active IP Right Grant
- 1989-03-15 EP EP19890903853 patent/EP0424389A1/en not_active Withdrawn
-
1990
- 1990-09-14 FI FI904551A patent/FI92243C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI92243B (en) | 1994-06-30 |
FI904551A0 (en) | 1990-09-14 |
FI92243C (en) | 1994-10-10 |
WO1989008785A1 (en) | 1989-09-21 |
SE461419B (en) | 1990-02-12 |
AU3293489A (en) | 1989-10-05 |
SE8800925L (en) | 1989-09-16 |
EP0424389A1 (en) | 1991-05-02 |
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