US4033593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for large annular openings
Assignee: Westinghouse Electric Corp
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Filing: 1976-06-28
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Granted: 1977-07-05
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Expires: 1996-06-28
Abstract
Abstract An elastomeric seal for sealing a large annular space having a groove on the low pressure side so that the seal will deflect easily when inserting a cylinder from the low pressure side and will withstand high differential pressure without blowing through.
Inventors
- 👤 Albert J. Molnar
- 👤 George E. Rudd
- 👤 Joseph F. Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:07
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3224
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
An annular seal for sealing a large annular space between a tubular member and a cylindrical member, said annular seal comprising an annular band forming a base, a low pressure side and a high pressure side, said base band being formed to generally engage the inner surface of the tubular member and to increase in thickness as it extends from its low pressure side toward its high pressure side, a generally frustoconical-shaped portion made integral with the base and so disposed that the apex would be on the high pressure side of the seal and an annular groove disposed on the low pressure side of the seal between said base and said frustoconical-shaped portion, whereby said annular seal will deflect easily when inserting the cylindrical member from the low pressure side and will withstand high differential pressures without blowing through.
Claim 2
Dependent Claim
140 words
An annular seal for sealing a large annular space between a tubular member and a cylindrical member, said annular seal comprising an annular band forming a base, a low pressure side and a high pressure side, said base band being formed to generally engage the inner surface of the tubular member and to increase in thickness as it extends from its low pressure side toward its high pressure side, a generally frustoconical-shaped portion made integral with the base and so disposed that the apex would be on the high pressure side of the seal and an annular groove disposed on the low pressure side of the seal between said base and said frustoconical-shaped portion, whereby said annular seal will deflect easily when inserting the cylindrical member from the low pressure side and will withstand high differential pressures without blowing through.
Claim 3
Dependent Claim
18 words
An annular seal as set forth in claim 1, wherein the frustoconical portion has generally parallel wall portions.
Claim 4
Dependent Claim
28 words
An annular seal as set forth in claim 1, wherein the depth of the groove is generally about one-half the thickness of the wall of the frustoconical portion.
Claim 5
Dependent Claim
38 words
An annular seal as set forth in claim 2, wherein the low pressure side of the frustoconical portion is shaved at an angle to reduce the wall thickness as it approaches the inner end of the frustoconical portion.
Claim 6
Dependent Claim
29 words
An annular seal as set forth in claim 1, wherein the base has a generally cylindrical outer peripheral surface and the groove is generally parallel to said peripheral surface.
Claim 7
Dependent Claim
17 words
The annular seal as set forth in claim 1, wherein the seal is formed from an elastomer.
Claim 8
Dependent Claim
14 words
A seal as set forth in claim 6, wherein the elastomer is a polyurethane.
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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |