Patent US3303757A successfully refreshed from Google Patents.
US3303757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sleeve seal
Assignee: Individual
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Filing: 1965-09-23
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Granted: 1967-02-14
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Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 John R Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:05
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; Y; Y10; Y10S; Y10S417/00; Y10S417/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A SEAL COMPRISING: FIRST AND SECOND MEMBERS DISPOSED FOR RELATIVE MOVEMENT AND DEFINING A HIGH PRESSURE ZONE THEREBETWEEN; ONE OF SAID MEMBER PRESENTING A FIRST CYLINDRICAL SURFACE TOWARD THE OTHER OF SAID MEMBERS; SAID OTHER MEMBER HAVING AN ANNULAR RECESS DEFINED BETWEEN AXIALLY FACING SHOULDERS; AN ANNULAR MEMBER DISPOSED IN SAID RECESS OF SAID OTHER MEMBER AND HAVING A SECOND CYLINDRICAL SURFACE SPACED A FIRST DISTANCE FROM SAID FIRST CYLINDRICAL SURFACE, SAID ANNULAR MEMBER HAVING A CURVED SURFACE EXTENDING FROM SAID SECOND CYLINDRICAL SURFACE TO WARD SAID FIRST CYLINDRICAL SURFACE AND TERMINATING AT A THIRD CYLINDRICAL SURFACE FORMING PART OF SAID ANNULAR MEMBER AND SPACED FROM SAID FIRST CYLINDRICAL SURFACE A LESSER DISTANCE THAN SAID FIRST DISTANCE, SAID THIRD CYLINDRICAL SURFACE BEING AT AN END OF SAID AN-
Claim 2
Dependent Claim
128 words
A SEAL COMPRISING: FIRST AND SECOND MEMBERS DISPOSED FOR RELATIVE MOVEMENT AND DEFINING A HIGH PRESSURE ZONE THEREBETWEEN; ONE OF SAID MEMBER PRESENTING A FIRST CYLINDRICAL SURFACE TOWARD THE OTHER OF SAID MEMBERS; SAID OTHER MEMBER HAVING AN ANNULAR RECESS DEFINED BETWEEN AXIALLY FACING SHOULDERS; AN ANNULAR MEMBER DISPOSED IN SAID RECESS OF SAID OTHER MEMBER AND HAVING A SECOND CYLINDRICAL SURFACE SPACED A FIRST DISTANCE FROM SAID FIRST CYLINDRICAL SURFACE, SAID ANNULAR MEMBER HAVING A CURVED SURFACE EXTENDING FROM SAID SECOND CYLINDRICAL SURFACE TO WARD SAID FIRST CYLINDRICAL SURFACE AND TERMINATING AT A THIRD CYLINDRICAL SURFACE FORMING PART OF SAID ANNULAR MEMBER AND SPACED FROM SAID FIRST CYLINDRICAL SURFACE A LESSER DISTANCE THAN SAID FIRST DISTANCE, SAID THIRD CYLINDRICAL SURFACE BEING AT AN END OF SAID AN-
References Cited (Backward Citations)
US2332763A
Cited
US2565701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |