Patent US2838607A successfully refreshed from Google Patents.
Patent US3135562A successfully refreshed from Google Patents.
US3135562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearings
Assignee: Rolls Royce PLC
•
Filing: 1963-01-07
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Granted: 1964-06-02
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Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 Davies David Omri
- 👤 Keen John Michael Storer
- 👤 Heansman George Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:28
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/30; F16C33/66; F16C33/6637; F16C33/72; F16C33/76; F16C19/00; F16C19/02; F16C19/04; F16C19/06; F16C2360/00; F16C2360/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A SHAFT BEARING ASSEMBLY COMPRISING A SHAFT, A BEARING IN WHICH THE SHAFT IS MOUNTED, A WALL SUPPORTING THE BEARING, TWO PAIRS OF SPACED SEALS, ONE PAIR ON EACH AXIAL SIDE OF THE BEARING AND SEALING THE WALL AGAINST THE SHAFT, THE WALL, THE SHAFT AND SAID SEALS PROVIDING A SEALED LUBRICANT CHAMBER WITHIN WHICH SAID BEARING IS DISPOSED, AND TWO SEALED CHAMBERS ONE ON EACH AXIAL SIDE OF THE LUBRICANT CHAMBER, INTERNAL DUCT MEANS BEING PROVIDED IN SAID SHAFT AND COMMUNICATING WITH EACH OF SAID TWO CHAMBERS AND WITH EXHAUST, WHEREBY WHEN AN EXTERNAL FLUID PRESSURE DIFFERENTIAL EXISTS ACROSS THE BEARING, THE FLUID LEAKING INTO EITHER OF SAID CHAMBERS ESCAPES VIA SAID INTERNAL DUCT MEANS TO EXHAUST WITHOUT ENTERING THE LUBRICANT CHAMBER.
Claim 2
Dependent Claim
123 words
A SHAFT BEARING ASSEMBLY COMPRISING A SHAFT, A BEARING IN WHICH THE SHAFT IS MOUNTED, A WALL SUPPORTING THE BEARING, TWO PAIRS OF SPACED SEALS, ONE PAIR ON EACH AXIAL SIDE OF THE BEARING AND SEALING THE WALL AGAINST THE SHAFT, THE WALL, THE SHAFT AND SAID SEALS PROVIDING A SEALED LUBRICANT CHAMBER WITHIN WHICH SAID BEARING IS DISPOSED, AND TWO SEALED CHAMBERS ONE ON EACH AXIAL SIDE OF THE LUBRICANT CHAMBER, INTERNAL DUCT MEANS BEING PROVIDED IN SAID SHAFT AND COMMUNICATING WITH EACH OF SAID TWO CHAMBERS AND WITH EXHAUST, WHEREBY WHEN AN EXTERNAL FLUID PRESSURE DIFFERENTIAL EXISTS ACROSS THE BEARING, THE FLUID LEAKING INTO EITHER OF SAID CHAMBERS ESCAPES VIA SAID INTERNAL DUCT MEANS TO EXHAUST WITHOUT ENTERING THE LUBRICANT CHAMBER.
References Cited (Backward Citations)
FR1110622A
Cited
US3057542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |