US3268232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal assemblies
Assignee: National Research Development Corp UK
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Filing: 1963-04-25
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Granted: 1966-08-23
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Expires: 1983-04-25
Abstract
No abstract record available.
Inventors
- 👤 Richards Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:41
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/346; F16J15/3448; F16J15/44; F16J15/441
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A SHAFT SEAL ASSEMBLY COMPRISING: A STATIONARY SHAFT HOUSING; A ROTATABLE SHAFT PASSING THROUGH SAID HOUSING; A ROTATIONALLY STATIONARY MEMBER OF SOFT PACKING MATERIAL ARRANGED AROUND SAID SHAFT AND SEALINGLY CONTACTING THE PERIPHERAL SURFACE THEREOF; A JACKET OF MATERIAL HAVING A LOW MODULUS OF ELASTICITY EMBRACING THE SIDES AND THE OUTER SURFACE OF SAID MEMBER, SAID JACKET BEING DISPOSED IN SAID HOUSING FOR RADIAL MOVEMENT RELATIVE TO SAID SHAFT AND BEING STATIONARY RELATIVE TO THE ROTATION OF SAID SHAFT; AT LEAST ONE SEALING MEMBER BETWEEN SAID JACKET AND SAID HOUSING: AND MEANS FOR SUPPLYING FLUID PRESSURE TO THE OUTER PERIPHERAL SURFACE OF SAID JACKET TO URGE SAID MEMBER SEALINGLY AGAINST SAID SHAFT.
Claim 2
Dependent Claim
112 words
A SHAFT SEAL ASSEMBLY COMPRISING: A STATIONARY SHAFT HOUSING; A ROTATABLE SHAFT PASSING THROUGH SAID HOUSING; A ROTATIONALLY STATIONARY MEMBER OF SOFT PACKING MATERIAL ARRANGED AROUND SAID SHAFT AND SEALINGLY CONTACTING THE PERIPHERAL SURFACE THEREOF; A JACKET OF MATERIAL HAVING A LOW MODULUS OF ELASTICITY EMBRACING THE SIDES AND THE OUTER SURFACE OF SAID MEMBER, SAID JACKET BEING DISPOSED IN SAID HOUSING FOR RADIAL MOVEMENT RELATIVE TO SAID SHAFT AND BEING STATIONARY RELATIVE TO THE ROTATION OF SAID SHAFT; AT LEAST ONE SEALING MEMBER BETWEEN SAID JACKET AND SAID HOUSING: AND MEANS FOR SUPPLYING FLUID PRESSURE TO THE OUTER PERIPHERAL SURFACE OF SAID JACKET TO URGE SAID MEMBER SEALINGLY AGAINST SAID SHAFT.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |