US3319968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse pressure cartridge-type face seal
Assignee: Bank of America Illinois
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Filing: 1965-04-01
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Granted: 1967-05-16
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Kermit D Yost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:04
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A ROTARY SEAL ASSEMBLY COMPRISING, IN COMBINATION, AN ANNULAR CARTRIDGE CASE DEFINING OPPOSED INNER AND OUTER CYLINDRICAL WALLS, AN ANNULAR STATOR LOOSELY FITTED BETWEEN SAID WALLS WITHIN SAID CASE, SAID STATOR HAVING A SEALING SURFACE ADAPTED TO EXTEND FROM SAID CASE AND AN ANNULAR SHOULDER ADJACENT SAID INNER WALL WITHIN SAID CASE, A FIRST O-RING FITTED AGAINST SAID INNER WALL WITHIN SAID CASE AND ADJACENT SAID SHOULDER OF SAID STATOR, AN ANNULAR WASHER HAVING AN INTERNALLY TAPERED NOSE PORTION ADAPTED TO PRESS SAID FIRST O-RING AGAINST SAID INNER WALL AND SAID SHOULDER, MEANS FOR BIASING SAID ANNULAR WASHER AGAINST SAID FIRST O-RING, SAID STATOR FORMED TO DEFINE AN INTERNAL CYLINDRICAL SURFACE OVERLYING SAID ANNULAR WASHER, MEANS DEFINING AN ANNULAR GROOVE BETWEEN SAID CYLINDRICAL SURFACE AND SAID WASHER, AND A SECOND O-RING DISPOSED IN SAID GROOVE AND SEALINGLY ENGAGING SAID CYLINDRICAL SURFACE AND SAID ANNULAR WASHER.
Claim 2
Dependent Claim
145 words
A ROTARY SEAL ASSEMBLY COMPRISING, IN COMBINATION, AN ANNULAR CARTRIDGE CASE DEFINING OPPOSED INNER AND OUTER CYLINDRICAL WALLS, AN ANNULAR STATOR LOOSELY FITTED BETWEEN SAID WALLS WITHIN SAID CASE, SAID STATOR HAVING A SEALING SURFACE ADAPTED TO EXTEND FROM SAID CASE AND AN ANNULAR SHOULDER ADJACENT SAID INNER WALL WITHIN SAID CASE, A FIRST O-RING FITTED AGAINST SAID INNER WALL WITHIN SAID CASE AND ADJACENT SAID SHOULDER OF SAID STATOR, AN ANNULAR WASHER HAVING AN INTERNALLY TAPERED NOSE PORTION ADAPTED TO PRESS SAID FIRST O-RING AGAINST SAID INNER WALL AND SAID SHOULDER, MEANS FOR BIASING SAID ANNULAR WASHER AGAINST SAID FIRST O-RING, SAID STATOR FORMED TO DEFINE AN INTERNAL CYLINDRICAL SURFACE OVERLYING SAID ANNULAR WASHER, MEANS DEFINING AN ANNULAR GROOVE BETWEEN SAID CYLINDRICAL SURFACE AND SAID WASHER, AND A SECOND O-RING DISPOSED IN SAID GROOVE AND SEALINGLY ENGAGING SAID CYLINDRICAL SURFACE AND SAID ANNULAR WASHER.
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |