Patent US3491536A successfully refreshed from Google Patents.
Patent US3179476A successfully refreshed from Google Patents.
US3179476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary vacuum seal
Assignee: Individual
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Filing: 1963-03-04
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Granted: 1965-04-20
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Expires: 1983-03-04
Abstract
No abstract record available.
Inventors
- 👤 Steven D Hurwitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:19
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
APPARATUS FOR USE IN CONNECTION WITH A HOUSING HAVING A PRESSURE DIFFERENTIAL BETWEEN ITS INTERIOR AND EXTERIOR AND FOR TRANSMITTING ROTARY MOTION INTO SAID INTERIOR FROM AN EXTERNAL POWER SOURCE WITHOUT AFFECTING SAID PRESSURE DIFFERENTIAL COMPRISING AN ELONGATED BODY MEMBER HAVING MEANS THEREON FOR PRESSURE TIGHT MOUNTING SAID BODY MEMBER IN THE WALL OF SAID HOUSING TO PROVIDE AND OUTER END AND AN INNER END OF SAID BODY DISPOSED EXTERNALLY AND INTERNALLY OF SAID HOUSING RESPECTIVELY, A DRIVE SHAFT JOURNALLED IN SAID BODY MEMBER WITH ITS ENDS PROJECTING BEYOND THE ENDS THEREOF, RESPECTIVE BEARING MEANS IN THE END PORTIONS OF SAID BODY MEMBER CARRYING SAID DRIVE SHAFT, INDEPENDENTLY ROTATABLE BEARING SLEEVE MEMBERS DISPOSED WITHIN SAID BODY MEMBER RECEIVING SAID DRIVE SHAFT, SAID SLEEVE MEMBERS HAVING SEALING MEANS IN THEIR RADIALLY OUTER SURFACES TO PROVIDE A ROTARY SEAL WITH SAID BODY MEMBER AND CORRESPONDING SEALING MEANS DISPOSED ON SAID SHAFT IN CONTACT WITH SAID SLEEVE MEMBERS TO PROVIDE A ROTARY SEAL THEREBETWEEN.
Claim 2
Dependent Claim
161 words
APPARATUS FOR USE IN CONNECTION WITH A HOUSING HAVING A PRESSURE DIFFERENTIAL BETWEEN ITS INTERIOR AND EXTERIOR AND FOR TRANSMITTING ROTARY MOTION INTO SAID INTERIOR FROM AN EXTERNAL POWER SOURCE WITHOUT AFFECTING SAID PRESSURE DIFFERENTIAL COMPRISING AN ELONGATED BODY MEMBER HAVING MEANS THEREON FOR PRESSURE TIGHT MOUNTING SAID BODY MEMBER IN THE WALL OF SAID HOUSING TO PROVIDE AND OUTER END AND AN INNER END OF SAID BODY DISPOSED EXTERNALLY AND INTERNALLY OF SAID HOUSING RESPECTIVELY, A DRIVE SHAFT JOURNALLED IN SAID BODY MEMBER WITH ITS ENDS PROJECTING BEYOND THE ENDS THEREOF, RESPECTIVE BEARING MEANS IN THE END PORTIONS OF SAID BODY MEMBER CARRYING SAID DRIVE SHAFT, INDEPENDENTLY ROTATABLE BEARING SLEEVE MEMBERS DISPOSED WITHIN SAID BODY MEMBER RECEIVING SAID DRIVE SHAFT, SAID SLEEVE MEMBERS HAVING SEALING MEANS IN THEIR RADIALLY OUTER SURFACES TO PROVIDE A ROTARY SEAL WITH SAID BODY MEMBER AND CORRESPONDING SEALING MEANS DISPOSED ON SAID SHAFT IN CONTACT WITH SAID SLEEVE MEMBERS TO PROVIDE A ROTARY SEAL THEREBETWEEN.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |