US3770284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft and line seals
Assignee: George Angus and Co Ltd
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Filing: 1968-09-09
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Granted: 1973-11-06
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Expires: 1988-09-09
Abstract
Abstract A shaft seal, of the face seal type, consists of a ring of microcellular polyurethane of which one end forms a holding portion, to fit on a shaft, and the other end provides a sealing face, of relatively small area, to be held against a sealed surface by the resilience of the ring itself, thus avoiding the need for a loading spring.
Inventors
- 👤 P Galloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:05
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3496; F16J15/3436; F16J15/3456
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A face seal comprising a sealing ring of resiliently compressible microcellular polyurethane having one end portion constituting a holding portion, for mounting fast on one of two relatively rotatable members to be sealed, and the other end portion of said sealing ring constituting a face-sealing end, comprising a transversely radial sealing face to seal against the other of said two members, said sealing ring having an axial cross-sectional shape which is an irregular hexagon, so that said face-sealing end is tapered and offset towards the outer periphery of said sealing ring and said holding portion has sides provided by cylindrical surfaces at the inner and outer peripheries respectively of said sealing ring, and a casing ring which is substantially of L-section comprising a radial flange of which the inner diameter is larger than the outer diameter of said holding portion and an outer peripheral axial flange surrounding the outer cylindrical surface of said holding portion and part of the taper of said face-sealing end.
Claim 2
Dependent Claim
164 words
A face seal comprising a sealing ring of resiliently compressible microcellular polyurethane having one end portion constituting a holding portion, for mounting fast on one of two relatively rotatable members to be sealed, and the other end portion of said sealing ring constituting a face-sealing end, comprising a transversely radial sealing face to seal against the other of said two members, said sealing ring having an axial cross-sectional shape which is an irregular hexagon, so that said face-sealing end is tapered and offset towards the outer periphery of said sealing ring and said holding portion has sides provided by cylindrical surfaces at the inner and outer peripheries respectively of said sealing ring, and a casing ring which is substantially of L-section comprising a radial flange of which the inner diameter is larger than the outer diameter of said holding portion and an outer peripheral axial flange surrounding the outer cylindrical surface of said holding portion and part of the taper of said face-sealing end.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |