Patent US3259390A successfully refreshed from Google Patents.
US3259390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic balanced self-aligning shaft seal
Assignee: Individual
•
Filing: 1963-06-17
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Granted: 1966-07-05
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Sanford Dorothy Lucille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:32
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
IN A SYSTEM FOR SEALING A ROTATING SHAFT TO A PRESSURIZED FLUID CONTAINING STATIONARY HOUSING INCLUDING, (A) A COLLAR ENCIRCLING THE SHAFT, (B) SAID COLLAR SEALED TO THE SHAFT AND (C) ROTATED WITHIN THE SHAFT, (D) SAID COLLAR HAVING A RADIALLY DISPOSED SEALING SURFACE ON ONE SIDE OF THE COLLAR, AND (E) AN ANNULAR SEALING WASHER CONTACTING THE SEALING SURFACE OF THE COLLAR, (F) AN ANNULAR CYLINDER FORMED IN SAID HOUSING, (G) SAID ANNULAR SEALING WASHER ACTING AS AN ANNULAR PISTON IN SAID ANNULAR CYLINDER; THE IMPROVED MEANS FOR PRESSING THE SEALING WASHER AGAINST THE SEALING SURFACE OF THE COLLAR COMPRISING: (H) A FLUID CONDUIT CONNECTED TO THE ANNULAR CYLINDER IN SAID HOUSING, (I) MEANS FOR APPLYING FLUID PRESSURE TO SAID CONDUIT RESPONSIVE TO THE FLUID PRESSURE WITHIN SAID STATIONARY HOUSING, SAID MEANS INCLUDING: (J) AN ISOLATING CYLINDER, (K) A PISTON IN THE ISOLATION CYLINDER, (L) A TUBE CONNECTING ONE END OF THE ISOLATION CYLINDER TO THE HOUSING,
Claim 2
Dependent Claim
158 words
IN A SYSTEM FOR SEALING A ROTATING SHAFT TO A PRESSURIZED FLUID CONTAINING STATIONARY HOUSING INCLUDING, (A) A COLLAR ENCIRCLING THE SHAFT, (B) SAID COLLAR SEALED TO THE SHAFT AND (C) ROTATED WITHIN THE SHAFT, (D) SAID COLLAR HAVING A RADIALLY DISPOSED SEALING SURFACE ON ONE SIDE OF THE COLLAR, AND (E) AN ANNULAR SEALING WASHER CONTACTING THE SEALING SURFACE OF THE COLLAR, (F) AN ANNULAR CYLINDER FORMED IN SAID HOUSING, (G) SAID ANNULAR SEALING WASHER ACTING AS AN ANNULAR PISTON IN SAID ANNULAR CYLINDER; THE IMPROVED MEANS FOR PRESSING THE SEALING WASHER AGAINST THE SEALING SURFACE OF THE COLLAR COMPRISING: (H) A FLUID CONDUIT CONNECTED TO THE ANNULAR CYLINDER IN SAID HOUSING, (I) MEANS FOR APPLYING FLUID PRESSURE TO SAID CONDUIT RESPONSIVE TO THE FLUID PRESSURE WITHIN SAID STATIONARY HOUSING, SAID MEANS INCLUDING: (J) AN ISOLATING CYLINDER, (K) A PISTON IN THE ISOLATION CYLINDER, (L) A TUBE CONNECTING ONE END OF THE ISOLATION CYLINDER TO THE HOUSING,
References Cited (Backward Citations)
US2593939A
Cited
US2438457A
Cited
US2430918A
Cited
US2672357A
Cited
US2628112A
Cited
US2670973A
Cited
US2738996A
Cited
US3074728A
Cited
US3174759A
Cited
US3194492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |