[특허]Gas spring with tubular shell seal

[미국특허] Gas spring with tubular shell seal 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16F-009/04
출원번호	US-0180623 (1980-08-25)
발명자 / 주소	Marx Thomas O. (Rockton IL)
출원인 / 주소	Atwood Vacuum Machine Company (Rockford IL 02)
인용정보	피인용 횟수 : 14 인용 특허 : 5

초록 ▼

A gas spring comprises a piston assembly slidable in a cylinder closed at one end and open at the other with a rod connected to the piston assembly and projecting through the open end of the cylinder. This open end is sealed by a sealing assembly and the interior of the cylinder contains a body of oil and a gas under pressure. The sealing assembly includes a shell of resilient material with one annular portion in sealing engagement with the rod, a second annular portion in sealing engagement with the inner wall of the cylinder, and a cavity containing a reservoir of oil. When the pressure in the cavity is less than the pressure in the cylinder, the inner portion of the shell collapses and, when the pressure differential is reversed, the inner end of the shell opens to permit oil to flow from the cavity to the cylinder. In either case, however, the action of the shell is such as to maintain the sealing action of each annular portion of the shell.

대표청구항 ▼

In a gas spring having a cylinder open at one end and closed at the other end, a piston slidable in said cylinder, a rod fixed to said piston and projecting out of said cylinder through the open end thereof, and a body of oil and a gas under pressure in said cylinder, the combination of, a rigid annulus disposed in said cylinder adjacent said open end thereof and encircling said rod, a tubular shell located between said closed end and said rigid annulus and having an outer generally annular end portion abutting said annulus and an inner end surrounding said rod with a generally cylindrical wall connecting said outer end portion and inner end, said shell being made of a flexible and resilient material, a first annular portion formed on said outer end portion of said shell adjacent said rod and extending around the entire inner periphery of said outer end portion, said first annular portion resiliently engaging said rod around the entire circumference thereof to form a seal between the shell and the rod, and a second annular portion formed on the exterior of said shell around the entire outer periphery of said outer end portion and engaging the inside of said cylinder around the entire circumference thereof to form a seal between the shell and the cylinder whereby said shell seals the open end of the cylinder, said inner end of said shell normally resiliently engaging said rod around the periphery thereof and said wall of said shell being spaced from said rod whereby the shell and the rod define an annular cavity, said cavity being filled with at least a portion of said body of oil, said wall expanding and contracting in response to differences of the pressures in said cylinder and in said cavity as said piston slides back and forth in the cylinder thereby to pump oil into and out of said cavity between said inner end and said rod and maintain the cavity full of oil.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

Skubal ; John J., Gas spring.
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Salin ; Gustav G., Head end closure for the cylinder of a piston and cylinder assembly.
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Ishida Kunio (Yokohama JA), Method for filling gas into gas spring.
상세보기
Itoh Hidekuni (Kasugai JA), Sealing arrangement for a shock absorber having an annular reservoir.
상세보기
Katsumori Teiji (Yokohama JPX), Shock absorber.
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이 특허를 인용한 특허 (14) 인용/피인용 타임라인 분석

Ricard Andre,FRX, Adjustable variable oleopneumatic shock-absorbing device.
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Hans-Gunther Muller DE, Air damper for a movably supported structural part, in particular in automobiles.
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Mintgen Rolf (Thr DEX), Cylinder-piston device.
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Becker, William M., Damping cylinder with annular bladder.
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Krtgen Bernd (Adenau DEX) Morgen Helmut (Mannebach DEX) Heinrichs Heinz-Josef (Koblenz-Metternich DEX) Fuhrmann Castor (Brachtendorf DEX) Freitag Herbert (Koblenz-Metternich DEX), Gas spring.
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Wirges Winfried (Koblenz DEX), Gas spring.
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Miura Toshiya,JPX ; Miyazawa Tadashi,JPX, Hydraulic shock absorber.
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Finstad, Eric J.; Pauly, Thomas E., Longitudinal bulging seal for spray gun.
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Dittrich, Vital, Method in the operation of magnetic separators.
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Lisenker,Ilya; Lun,Saiman, Monotube strut with rebound cut-off feature.
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Szcupak Peter (Park Ridge IL), Multi-function fluid seal for dampers and the like.
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Clapper Robert L. (Cary NC) Gradle Richard J. (Pittsburgh PA) Bake Earl A. (Pittsburgh PA), Orifice plate seal ring for controlled closure check valve.
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Mc Candless John Gregg, Suspension damper with rebound cut-off.
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Fehring John David ; Machrowicz Tad Vincent ; Mc Candless John Greg, Suspension damper with self-aligning rebound cut-off.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Gas spring with tubular shell seal 원문보기