US4890542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure-fluid machine, a seal
Assignee: Dresser Rand Co
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Filing: 1988-09-06
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Granted: 1990-01-02
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Expires: 2008-09-06
Abstract
Abstract The seal, for use especially in non-lubricated, high-pressure, as compressors, in a one-piece, continuous sleeve which envelopes a reciprocable piston for sealing against the piston, or against the cylinder in which the piston translates. One end of the sleeve effects the sealing engagement, and the other end is spring-loaded to maintain the engagement. During operation of the compressor, or the like, it is the high-pressure gas which urges the seal into sealing engagement.
Inventors
- 👤 Bernard F. Miller
- 👤 John A. Sawyer
- 👤 Wayne F. Wehber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:22
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/46; F16J15/48; F04; F04B; F04B39/00; F04B39/04; F04B39/041; F04B39/042
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
146 words
In a high-pressure-fluid machine, a seal, comprising: a cylinder, having an inner, bore surface; and a piston, having an outer, cylindrical surface; wherein said piston is reciprocably disposed in said cylinder; and a seal interposed between said piston and said cylinder, for sealing against one of said surfaces; wherein said seal comprises a one-piece, continuous sleeve; said seal has (a) a sealing surface at only one end thereof, and (b) a bearinhg surface at an end thereof which is opposite said one end; and means confined within said cylinder, and engaged with said bearing surface end of said seal, for urging said one sealing end of said seal into sealing engagement with said one surface; wherein said piston has a shoulder formed thereon; said urging means comprises a compression spring in envelopment of said piston; and said spring has an end thereof engaged with said shoulder.
Claim 2
Dependent Claim
146 words
In a high-pressure-fluid machine, a seal, comprising: a cylinder, having an inner, bore surface; and a piston, having an outer, cylindrical surface; wherein said piston is reciprocably disposed in said cylinder; and a seal interposed between said piston and said cylinder, for sealing against one of said surfaces; wherein said seal comprises a one-piece, continuous sleeve; said seal has (a) a sealing surface at only one end thereof, and (b) a bearinhg surface at an end thereof which is opposite said one end; and means confined within said cylinder, and engaged with said bearing surface end of said seal, for urging said one sealing end of said seal into sealing engagement with said one surface; wherein said piston has a shoulder formed thereon; said urging means comprises a compression spring in envelopment of said piston; and said spring has an end thereof engaged with said shoulder.
Claim 3
Dependent Claim
28 words
The invention, according to claim 1, wherein: said shoulder, spring, and said seal, excepting said sealing end thereof, are spaced apart from said bore surface of said cylinder.
Claim 4
Dependent Claim
37 words
The invention, according to claim 1, wherein: said cylinder has an annulus nested therein; said urging means comprises a compression spring in envelopment of said piston; and said spring has an end thereof engaged with said annulus.
Claim 5
Dependent Claim
146 words
In a high-pressure-fluid machine, a seal, comprising; a cylinder, having an inner, bore surface; and a piston, having an outer, cylindrical surface; wherein said piston is reciprocably disposed in said cylinder; and a seal interposed between said piston and said cylinder, for sealing against one of said surfaces; wherein said seal comprises a one-piece, continuous sleeve; said seal has (a) a sealing surface at only one end thereof, and (b) a bearing surface at an end thereof which is opposite said one end; and means confined within said cylinder, and engaged with said bearing surface end of said seal, for urging said one sealing end of said seal into sealing engagement with said one surface; wherein one of said surfaces has means formed therein for accommodating a conduct of pressured fluid along said piston for impingement of such fluid with said bearing-surface end of said seal.
Claim 6
Dependent Claim
146 words
In a high-pressure-fluid machine, a seal, comprising; a cylinder, having an inner, bore surface; and a piston, having an outer, cylindrical surface; wherein said piston is reciprocably disposed in said cylinder; and a seal interposed between said piston and said cylinder, for sealing against one of said surfaces; wherein said seal comprises a one-piece, continuous sleeve; said seal has (a) a sealing surface at only one end thereof, and (b) a bearing surface at an end thereof which is opposite said one end; and means confined within said cylinder, and engaged with said bearing surface end of said seal, for urging said one sealing end of said seal into sealing engagement with said one surface; wherein one of said surfaces has means formed therein for accommodating a conduct of pressured fluid along said piston for impingement of such fluid with said bearing-surface end of said seal.
Claim 7
Dependent Claim
28 words
The invention, according to claim 4, wherein: said urging means and said seal, excepting said sealing end thereof are spaced apart from said bore surface of said cylinder.
Claim 8
Dependent Claim
18 words
The invention, according to claim 4, wherein: said fluid-accommodating means comprises a channel formed in said one surface.
Claim 9
Dependent Claim
18 words
The invention, according to claim 6, wherein: said outer cylindrical surface of said piston is said one surface.
Claim 10
Dependent Claim
18 words
The invention, according to claim 6, wherein: said inner, bore surface of said cylinder is said one surface.
Claim 11
Dependent Claim
21 words
The invention, according to claim 4, further including: an annulus, in envelopment of said piston, for guiding said piston in reciprocation.
Claim 12
Dependent Claim
14 words
The invention, according to claim 9, wherein: said annulus is carried by said piston.
Claim 13
Dependent Claim
14 words
The invention according to claim 9, wherein: said annulus is nested in said cylinder.
References Cited (Backward Citations)
US1346652A
Cited
FR621058A
Cited
US1945151A
Cited
DE854611C
Cited
GB788253A
Cited
FR1274512A
Cited
US3303757A
Cited
US3549155A
Cited
US4170363A
Cited
US4352499A
Cited
DE3010829A1
Cited
DE3204553A1
Cited
US4582329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-01 | 1993-07-03 | 1994-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-01 | 1997-07-03 | 1998-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-01 | 2001-07-03 | 2002-01-02 | $7700.00 | Window Closed / Lapsed |