US3075349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating arrangements for bearings in engines
Assignee: Rolls Royce PLC
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Filing: 1961-05-12
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Granted: 1963-01-29
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Expires: 1981-05-12
Abstract
No abstract record available.
Inventors
- 👤 Bill Arthur
- 👤 Dawson Douglas Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:14
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A GAS TURBINE ENGINE HAVING (A) A LOW-PRESSURE ROTOR, (B) AN INDEPENDENTLY ROTATING HIGH-PRESSURE ROTOR, (C) STATIONARY STRUCTURE, (D) BEARINGS SUPPORTING THE ROTORS IN SAID STATIONARY STRUCTURE, AND (E) A LUBRICATING ARRANGEMENT SUPPLYING LUBRICANT TO SAID BEARINGS AND COMPRISING (E1) A MAIN LUBRICANT PUMP DRIVEN FROM SAID HIGHPRESSURE ROTOR AND DELIVERING LUBRICANT TO A SUPPLY PATH LEADING TO ONE OF THE BEARINGS, (E2) A SUMP WHICH COLLECTS LUBRICANT DRAINED FROM SAID ONE OF THE BEARINGS, (E3) A SCAVENGE PUMP DRIVEN FROM SAID LOW-PRESSURE ROTOR AND WITHDRAWING LUBRICANT FROM SAID SUMP AND CONNECTED TO DELIVER TO THE INLET SIDE OF SAID MAIN PUMP, AND (E4) A METERING PUMP DRIVEN FROM THE LOW-PRESSURE ROTOR AND CONNECTED IN SAID SUPPLY PATH
Claim 2
Dependent Claim
118 words
A GAS TURBINE ENGINE HAVING (A) A LOW-PRESSURE ROTOR, (B) AN INDEPENDENTLY ROTATING HIGH-PRESSURE ROTOR, (C) STATIONARY STRUCTURE, (D) BEARINGS SUPPORTING THE ROTORS IN SAID STATIONARY STRUCTURE, AND (E) A LUBRICATING ARRANGEMENT SUPPLYING LUBRICANT TO SAID BEARINGS AND COMPRISING (E1) A MAIN LUBRICANT PUMP DRIVEN FROM SAID HIGHPRESSURE ROTOR AND DELIVERING LUBRICANT TO A SUPPLY PATH LEADING TO ONE OF THE BEARINGS, (E2) A SUMP WHICH COLLECTS LUBRICANT DRAINED FROM SAID ONE OF THE BEARINGS, (E3) A SCAVENGE PUMP DRIVEN FROM SAID LOW-PRESSURE ROTOR AND WITHDRAWING LUBRICANT FROM SAID SUMP AND CONNECTED TO DELIVER TO THE INLET SIDE OF SAID MAIN PUMP, AND (E4) A METERING PUMP DRIVEN FROM THE LOW-PRESSURE ROTOR AND CONNECTED IN SAID SUPPLY PATH
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) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |