US3170576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary seal
Assignee: Pennwalt Corp
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Filing: 1962-08-24
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Granted: 1965-02-23
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Expires: 1982-08-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/56; C23C14/562; F; F16; F16J; F16J15/00; F16J15/16; F16J15/168; Y; Y10; Y10S; Y10S118/00; Y10S118/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A SEAL UNIT COMPRISING A HOUSING, FIRST AND SECOND ROLLERS ROTATABLY SUPPORTED AT THEIR ENDS BY SAID HOUSING, SAID ROLLERS BEING TANGENT TO EACH OTHER AND IN ROLLING ENGAGEMENT WITH EACH OTHER, SAID SECOND ROLLER INCLUDING A PLURALITY OF DISCRETE SEGMENTS DISPOSED SIDE BY SIDE, AN ELASTIC SLEEVE MAINTAINING SAID SEGMENTS IN SUCH SIDE BY SIDE DISPOSITION, AND MEANS FOR EVACUATING THE INTERIOR OF SAID SECOND ROLLER AND THE SPACE AROUND THE ENDS OF SAID FIRST ROLLER.
Claim 2
Dependent Claim
77 words
A SEAL UNIT COMPRISING A HOUSING, FIRST AND SECOND ROLLERS ROTATABLY SUPPORTED AT THEIR ENDS BY SAID HOUSING, SAID ROLLERS BEING TANGENT TO EACH OTHER AND IN ROLLING ENGAGEMENT WITH EACH OTHER, SAID SECOND ROLLER INCLUDING A PLURALITY OF DISCRETE SEGMENTS DISPOSED SIDE BY SIDE, AN ELASTIC SLEEVE MAINTAINING SAID SEGMENTS IN SUCH SIDE BY SIDE DISPOSITION, AND MEANS FOR EVACUATING THE INTERIOR OF SAID SECOND ROLLER AND THE SPACE AROUND THE ENDS OF SAID FIRST ROLLER.
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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |