Patent US1417013A successfully refreshed from Google Patents.
Patent US3109658A successfully refreshed from Google Patents.
US3109658A
Expired / Lapsed
US
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Viscosity groove type shaft seal
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1958-02-04
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Granted: 1963-11-05
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Expires: 1978-02-04
Abstract
No abstract record available.
Inventors
- 👤 Barrett Terence
- 👤 Williams Kenneth John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:11
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/406; F16J15/34; F16J15/3404; F16J15/3408; F16J15/3412; F16J15/342
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A SHAFT SEAL OF THE VISCOSITY GROOVE TYPE IN WHICH A SEAL IS EFFECTED BY LIQUID UNDER PRESSURE COMPRISING TWO SMOOTH SURFACED MEMBERS ARRANGED FACE-TO-FACE, TWO SERIES OF VISCOSITY GROOVES SEPARATED BY A CONTINUOUS UNGROOVED SURFACE IN ONE OF SAID MEMBERS, SAID GROOVES ARRANGED TO GENERATE SAID PRESSURE, THE SERIES ON THE GAS PRESSURE SIDE OF THE SEAL BEING ARRANGED TO GENERATE A GREATER LIQUID PRESSURE THAN THE OTHER SERIES SO THAT A GAS/ LIQUID INTERFACE IS SET UP IN THE FIRST MENTIONED SERIES.
Claim 2
Dependent Claim
84 words
A SHAFT SEAL OF THE VISCOSITY GROOVE TYPE IN WHICH A SEAL IS EFFECTED BY LIQUID UNDER PRESSURE COMPRISING TWO SMOOTH SURFACED MEMBERS ARRANGED FACE-TO-FACE, TWO SERIES OF VISCOSITY GROOVES SEPARATED BY A CONTINUOUS UNGROOVED SURFACE IN ONE OF SAID MEMBERS, SAID GROOVES ARRANGED TO GENERATE SAID PRESSURE, THE SERIES ON THE GAS PRESSURE SIDE OF THE SEAL BEING ARRANGED TO GENERATE A GREATER LIQUID PRESSURE THAN THE OTHER SERIES SO THAT A GAS/ LIQUID INTERFACE IS SET UP IN THE FIRST MENTIONED SERIES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |