US3334908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary seal
Assignee: Pennwalt Corp
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Filing: 1964-04-13
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Granted: 1967-08-08
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Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 Charles L Starbuck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:49
CPC Classifications
D; D06; D06B; D06B23/00; D06B23/14; D06B23/18; Y; Y10; Y10S; Y10S277/00; Y10S277/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A ROTARY SEAL MEANS COMPRISING A FRAME HAVING AN OPPOSED INLET AND OUTLET, A PAIR OF MATING ROLLERS ROTATABLY COUPLED TO SAID FRAME AND EXTENDING TRANSVERSELY THEREACROSS, AT LEAST ONE OF SAID ROLLERS HAVING AN ELASTOMERIC SURFACE, A HOUSING COUPLED TO SAID FRME OVERLYING AND ENCLOSING A PORTION OF SAID ONE ROLLER, SAID HOUSING INCLUDING A TRANSVERSELY DISPOSED CAVITY, A WIPER ROLLER IN SAID CAVITY AND NORMALLY IN ROLLING CONTACT WITH SAID ONE ROLLER, SAID WIPER ROLLER AND SAID HOUSIND DEFINING THEREBETWEEN A CLEARANCE SPACE LESS THAN THE MEAN FREE PATH OF GAS MOLECULES AT THE INLET OF SAID FRAME, WIPER SEAL MEANS BETWEEN SAID WIPER ROLLER AND SAID HOUSING MEANS FOR SECURING SAID HOUSING TO SAID FRAME SO THAT SAID WIPER ROLLER MAY BE REMOVED FROM SAID ROTARY SEAL WITHOUT DISPLACING SAID MATING ROLLERS, AND SEALING MEANS BETWEEN SAID HOUSING AND SAID FRAME.
Claim 2
Dependent Claim
144 words
A ROTARY SEAL MEANS COMPRISING A FRAME HAVING AN OPPOSED INLET AND OUTLET, A PAIR OF MATING ROLLERS ROTATABLY COUPLED TO SAID FRAME AND EXTENDING TRANSVERSELY THEREACROSS, AT LEAST ONE OF SAID ROLLERS HAVING AN ELASTOMERIC SURFACE, A HOUSING COUPLED TO SAID FRME OVERLYING AND ENCLOSING A PORTION OF SAID ONE ROLLER, SAID HOUSING INCLUDING A TRANSVERSELY DISPOSED CAVITY, A WIPER ROLLER IN SAID CAVITY AND NORMALLY IN ROLLING CONTACT WITH SAID ONE ROLLER, SAID WIPER ROLLER AND SAID HOUSIND DEFINING THEREBETWEEN A CLEARANCE SPACE LESS THAN THE MEAN FREE PATH OF GAS MOLECULES AT THE INLET OF SAID FRAME, WIPER SEAL MEANS BETWEEN SAID WIPER ROLLER AND SAID HOUSING MEANS FOR SECURING SAID HOUSING TO SAID FRAME SO THAT SAID WIPER ROLLER MAY BE REMOVED FROM SAID ROTARY SEAL WITHOUT DISPLACING SAID MATING ROLLERS, AND SEALING MEANS BETWEEN SAID HOUSING AND SAID FRAME.
References Cited (Backward Citations)
DE114754C
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US2656284A
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US2910882A
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US3032890A
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US3158507A
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US3170576A
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US3227132A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |