US3591189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature seal
Assignee: Pneumo Dynamics Corp
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Filing: 1969-03-07
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Granted: 1971-07-06
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Expires: 1989-03-07
Abstract
Abstract A double lip rod seal in which one lip is curved and tapered, while the other is generally cylindrical, so that the former can experience directed thermal expansion and contraction relative to the surface sealingly engaged by same due to difference in the coefficients of thermal expansion thereof, the lips being spread apart by wedge loading means.
Inventors
- 👤 James N Tootle
- 👤 Glenn S Beidler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:49
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3216; F16J15/3232; F16J15/3236
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A high temperature seal comprising a ring form resiliently deformable member having radially spaced-apart inner and outer sealing lip sections which are generally cylindrical and concentric for engagement with corresponding annular surfaces to be sealed, the section of the member intermediate said generally cylindrical sections having an exterior surface which forms a curved continuation of the sealing surface of one of the lips, and backup means for supporting the member at the closed side thereof between the annular surfaces to be sealed, with that portion of said backup means opposed to the curved exterior surface of the member being curved at a larger radius to provide a tapered clearance therebetween, whereby the member is free to expand thermally along such clearance relative to the surfaces being sealed.
Claim 2
Dependent Claim
127 words
A high temperature seal comprising a ring form resiliently deformable member having radially spaced-apart inner and outer sealing lip sections which are generally cylindrical and concentric for engagement with corresponding annular surfaces to be sealed, the section of the member intermediate said generally cylindrical sections having an exterior surface which forms a curved continuation of the sealing surface of one of the lips, and backup means for supporting the member at the closed side thereof between the annular surfaces to be sealed, with that portion of said backup means opposed to the curved exterior surface of the member being curved at a larger radius to provide a tapered clearance therebetween, whereby the member is free to expand thermally along such clearance relative to the surfaces being sealed.
Claim 3
Dependent Claim
27 words
A seal as set forth in claim 1, wherein the intermediate section of the member decreases in thickness outwardly to the contiguous generally cylindrical sealing lip section.
Claim 4
Dependent Claim
23 words
A seal as set forth in claim 2, wherein the interior surface of the member at the open side thereof is of U-shape.
Claim 5
Dependent Claim
26 words
A seal as set forth in claim 3, wherein the exteriorly curved intermediate section extends over more than half of the radial width of the member.
Claim 6
Dependent Claim
22 words
A seal as set forth in claim 1, further comprising wedge means for independently loading the inner and outer sealing lip sections.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |