WO1995000772A1 - Degressive gas spring - Google Patents
Degressive gas spring Download PDFInfo
- Publication number
- WO1995000772A1 WO1995000772A1 PCT/SE1994/000500 SE9400500W WO9500772A1 WO 1995000772 A1 WO1995000772 A1 WO 1995000772A1 SE 9400500 W SE9400500 W SE 9400500W WO 9500772 A1 WO9500772 A1 WO 9500772A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- spring
- unit
- spring unit
- slave
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
Definitions
- the present invention relates to a degressive gas spring comprising two cylinder-piston units, one of which is selected as a working spring and the other as a slave spring, the cylinders and the ends of the piston rods of which are mutually operatively connected so that compression of the working spring brings about simultaneous compression of the slave spring, in conjunction with which the piston rod of each spring unit is mounted in an end wall in such a way as to be capable of sliding and supports a piston, the axial position of which in the cylinder determines the volume of an enclosed, gas-filled space inside the unit.
- a gas spring of the aforementioned kind is the object of Swedish Patent Application No. 9300859-9.
- the gas spring described here however, has cylinder-piston units of entirely different construction, which is disadvantageous, amongst other things, from the point of view of spare parts stocks and production.
- the object of the present invention is to make available a degressive gas spring in which the aforementioned disadvantages have been eliminated as far as possible.
- the designations 1 and 2 are used generally in the drawing in respect of two cylinder-piston units, of which the unit 1 is regarded as a working spring unit and the unit 2 as a slave spring unit.
- the cylinders la, 2a of the units and the ends of the piston rods are mutually operatively connected - by means of a yoke 3, 4 in the embodiment shown in the drawing - so that, when a force marked with an arrow 5 acts on the yoke 3, both cylinder-piston units are compressed.
- the units may be affected by, for example, two different parts of a single mechanical component, or by two mechanical components capable of synchronous movement.
- the piston rod lb, 2b of each unit is mounted in corresponding end walls lc, 2c in such a way as to be capable of sliding.
- the end walls lc, 2c are sealed against the respective cylinder la, lb by means of an O'-ring Id and 2d, and are conventionally fixed with a locking ring le and 2e.
- the axial position of the piston lh and 2h in the cylinder la and 2a determines the volume of a gas-filled space li and 2i.
- the piston lh and 2h and/or the end wall lc and 2c has a recess which forms an annular chamber lj and 2j in accordance with the invention.
- the annular chamber lj is formed from recesses in the form of chamfers in the end wall lc and in the piston lh, whereas the annular chamber 2j is formed by only a single recess in the piston 2h.
- the volume of the annular chamber 2j is also greater than that of the annular chamber lj, in order to ensure that the units are of identical overall length.
- the piston rod 2b has a smaller diameter than the piston rod lb.
- Each of the cylinder-piston units 1, 2 has two connections Ik, 11 and 2k, 21.
- the connections Ik, 2k discharge into the annular chambers lj and 2j, whereas the connections 11, 21 discharge into the gas-filled spaces li and 2i, and are positioned in such a way that the movement of the piston lh and 2h does not obstruct the flow orifices of the connections 11, 21.
- the cylinder-piston units are mutually connected via the aforementioned connections Ik, 11 and 2k, 21 by means of pipe or hose lines 6, 7, in such a way that the annular chamber 2j communicates with the space li via the line 6, and the space 2i is connected to the annular chamber lj via the line 7.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Springs (AREA)
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
- Joints Allowing Movement (AREA)
- Window Of Vehicle (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94919913A EP0702762B1 (en) | 1993-06-17 | 1994-05-27 | Degressive gas spring |
AU70867/94A AU7086794A (en) | 1993-06-17 | 1994-05-27 | Degressive gas spring |
DE69411737T DE69411737T2 (en) | 1993-06-17 | 1994-05-27 | DEGRESSIVE AIR SPRING |
US08/564,340 US5833218A (en) | 1993-06-17 | 1994-05-27 | Degressive gas spring |
TW083104854A TW251339B (en) | 1993-06-17 | 1994-05-28 | |
KR1019950705415A KR960702896A (en) | 1993-06-17 | 1995-12-01 | Tangible gas spring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9302097A SE500544C2 (en) | 1993-06-17 | 1993-06-17 | Degressive gas spring |
SE9302097-2 | 1993-06-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995000772A1 true WO1995000772A1 (en) | 1995-01-05 |
Family
ID=20390321
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1994/000500 WO1995000772A1 (en) | 1993-06-17 | 1994-05-27 | Degressive gas spring |
Country Status (11)
Country | Link |
---|---|
US (1) | US5833218A (en) |
EP (1) | EP0702762B1 (en) |
JP (1) | JP2864736B2 (en) |
KR (1) | KR960702896A (en) |
AT (1) | ATE168452T1 (en) |
AU (1) | AU7086794A (en) |
DE (1) | DE69411737T2 (en) |
ES (1) | ES2121214T3 (en) |
SE (1) | SE500544C2 (en) |
TW (1) | TW251339B (en) |
WO (1) | WO1995000772A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996039588A1 (en) * | 1995-06-06 | 1996-12-12 | Strömsholmens Mekaniska Verkstad Ab | Arrangement for a gas spring |
US5833218A (en) * | 1993-06-17 | 1998-11-10 | Stromsholmen Ab | Degressive gas spring |
US6059273A (en) * | 1994-03-31 | 2000-05-09 | Stromsholmen Ab | Gas spring arrangement |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19800661B4 (en) * | 1998-01-10 | 2005-05-19 | Burkhard Oest | Gas spring with adjustable gas volume |
US7114705B2 (en) * | 2004-03-30 | 2006-10-03 | Steiner Donald J | Grab-activated self-locking winch handle |
DE202005017987U1 (en) * | 2005-11-17 | 2006-01-12 | Kintec-Solution Gmbh | armchair |
CN107816579B (en) * | 2017-10-28 | 2019-06-07 | 宁夏金裕海化工有限公司 | A kind of damping device suitable for petroleum pipeline |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3646807A (en) * | 1970-05-18 | 1972-03-07 | Monterey Research Lab Inc | Transmissibility controlled vibration testing apparatus and method |
US5100113A (en) * | 1988-10-18 | 1992-03-31 | Aida Engineering Co., Ltd. | Pneumatic die cushion equipment |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1214343A (en) * | 1914-12-09 | 1917-01-30 | John W Matthews | Shock-absorber. |
US2977146A (en) * | 1956-07-23 | 1961-03-28 | William D Edwards | Pneumatic shock absorber bumper for motor vehicles |
US3328019A (en) * | 1965-10-20 | 1967-06-27 | Curtis L Wilson | Leveling device for vehicles |
JPS5475719A (en) * | 1977-11-25 | 1979-06-16 | Nissan Motor Co Ltd | Hidro-pneumatic suspension |
SE500544C2 (en) * | 1993-06-17 | 1994-07-11 | Stromsholmens Mek Verkstad | Degressive gas spring |
-
1993
- 1993-06-17 SE SE9302097A patent/SE500544C2/en not_active IP Right Cessation
-
1994
- 1994-05-27 JP JP7502688A patent/JP2864736B2/en not_active Expired - Lifetime
- 1994-05-27 ES ES94919913T patent/ES2121214T3/en not_active Expired - Lifetime
- 1994-05-27 EP EP94919913A patent/EP0702762B1/en not_active Expired - Lifetime
- 1994-05-27 US US08/564,340 patent/US5833218A/en not_active Expired - Fee Related
- 1994-05-27 AU AU70867/94A patent/AU7086794A/en not_active Abandoned
- 1994-05-27 WO PCT/SE1994/000500 patent/WO1995000772A1/en active IP Right Grant
- 1994-05-27 AT AT94919913T patent/ATE168452T1/en not_active IP Right Cessation
- 1994-05-27 DE DE69411737T patent/DE69411737T2/en not_active Expired - Lifetime
- 1994-05-28 TW TW083104854A patent/TW251339B/zh active
-
1995
- 1995-12-01 KR KR1019950705415A patent/KR960702896A/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3646807A (en) * | 1970-05-18 | 1972-03-07 | Monterey Research Lab Inc | Transmissibility controlled vibration testing apparatus and method |
US5100113A (en) * | 1988-10-18 | 1992-03-31 | Aida Engineering Co., Ltd. | Pneumatic die cushion equipment |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5833218A (en) * | 1993-06-17 | 1998-11-10 | Stromsholmen Ab | Degressive gas spring |
US6059273A (en) * | 1994-03-31 | 2000-05-09 | Stromsholmen Ab | Gas spring arrangement |
WO1996039588A1 (en) * | 1995-06-06 | 1996-12-12 | Strömsholmens Mekaniska Verkstad Ab | Arrangement for a gas spring |
Also Published As
Publication number | Publication date |
---|---|
SE9302097L (en) | 1994-07-11 |
ES2121214T3 (en) | 1998-11-16 |
JP2864736B2 (en) | 1999-03-08 |
EP0702762B1 (en) | 1998-07-15 |
JPH08510541A (en) | 1996-11-05 |
DE69411737D1 (en) | 1998-08-20 |
DE69411737T2 (en) | 1999-04-08 |
SE500544C2 (en) | 1994-07-11 |
US5833218A (en) | 1998-11-10 |
TW251339B (en) | 1995-07-11 |
ATE168452T1 (en) | 1998-08-15 |
SE9302097D0 (en) | 1993-06-17 |
AU7086794A (en) | 1995-01-17 |
EP0702762A1 (en) | 1996-03-27 |
KR960702896A (en) | 1996-05-23 |
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