US3516678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Limited leakage seal
Assignee: Stein Seal Co
•
Filing: 1964-06-01
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Granted: 1970-06-23
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Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Philip C Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3404; F16J15/3408; F16J15/3412; F16J15/3416
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A SEAL ASSEMBLY, A ROTATABLE SHAFT HAVING A RADIALLY EXTENDING ANNULAR SUBSTANTIALLY FLAT SURFACE FORMED THEREON, A SEAL RING MOUNTED ABOUT SAID SHAFT AND HAVING A PAIR OF GENERALLY OPPOSED RADIAL SURFACES FORMED THEREON, SAID RING BEING AXIALLY MOVABLE RELATIVE TO SAID SHAFT, ONE OF SAID SEAL RING RADIAL SURFACES CONFRONTING SAID SHAFT RADIAL SURFACE, A HOLLOW HOUSING DEFINING A FLUID PRESSURE CHAMBER THEREIN RECEIVING SAID SHAFT AND SAID SEAL RING THEREIN, SAID OTHER SEAL RING RADIAL SURFACE AND THE OUTER EDGE OF SAID ONE SEAL RING RADIAL SURFACE BEING EXPOSED TO SAID PRESSURE CHAMBER, THE INNER EDGE OF SAID ONE SEAL RING RADIAL SURFACE BEING EXPOSED TO A REGION OF RELATIVELY LOW PRESSURE DISPOSED ADJACENT SAID SHAFT, SO THAT FLUID FLOWS FROM SAID PRESSURE CHAMBER SO SAID LOW PRESSURE REGION ALONG A PATH BETWEEN SAID CONFRONTING SUR-
Claim 2
Dependent Claim
139 words
IN A SEAL ASSEMBLY, A ROTATABLE SHAFT HAVING A RADIALLY EXTENDING ANNULAR SUBSTANTIALLY FLAT SURFACE FORMED THEREON, A SEAL RING MOUNTED ABOUT SAID SHAFT AND HAVING A PAIR OF GENERALLY OPPOSED RADIAL SURFACES FORMED THEREON, SAID RING BEING AXIALLY MOVABLE RELATIVE TO SAID SHAFT, ONE OF SAID SEAL RING RADIAL SURFACES CONFRONTING SAID SHAFT RADIAL SURFACE, A HOLLOW HOUSING DEFINING A FLUID PRESSURE CHAMBER THEREIN RECEIVING SAID SHAFT AND SAID SEAL RING THEREIN, SAID OTHER SEAL RING RADIAL SURFACE AND THE OUTER EDGE OF SAID ONE SEAL RING RADIAL SURFACE BEING EXPOSED TO SAID PRESSURE CHAMBER, THE INNER EDGE OF SAID ONE SEAL RING RADIAL SURFACE BEING EXPOSED TO A REGION OF RELATIVELY LOW PRESSURE DISPOSED ADJACENT SAID SHAFT, SO THAT FLUID FLOWS FROM SAID PRESSURE CHAMBER SO SAID LOW PRESSURE REGION ALONG A PATH BETWEEN SAID CONFRONTING SUR-
References Cited (Backward Citations)
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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) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |