Patent US5697057A successfully refreshed from Google Patents.
Patent US3171252A successfully refreshed from Google Patents.
US3171252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine operated engine starters
Assignee: GE Healthcare UK Ltd
•
Filing: 1963-06-17
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Granted: 1965-03-02
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Expires: 1983-06-17
Abstract
No abstract record available.
Inventors
- 👤 Trowbridge David Roy
- 👤 Moss Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:26
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; F02C7/268; F02C7/275; F02C7/277
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A TURBINE-OPERATED ENGINE STARTER COMPRISING: A GAS TURBINE HAVING A TURBINE SHAFT AND A COMBUSTION CHAMBER; A TURBO-COMPRESSOR FOR SUPPLYING AIR TO SAID COMBUSTION CHAMBER, SAID COMPRESSOR INCLUDING A COMPRESSOR SHAFT HAVING A NORMAL DIRECTION OF ROTATION; A STARTER OUTPUT SHAFT; A THREE-LEG DIRRERENTIAL GEAR DRIVE HAVING ITS THREE LEGS OPERATIVELY CONNECTED RESPECTIVELY TO SAID TURBINE SHAFT, SAID COMPRESSOR SHAFT, AND SAID OUTPUT SHAFT; AN AUXILIARY STARTER MOTOR; DRIVE MEANS OPERATIVELY CONNECTING SAID AUXILIARY MOTOR WITH SAID COMPRESSOR SHAFT; AND AN OVER-RUNNING CLUTCH INTERPOSED BETWEEN THE COMPRESSOR SHAFT AND THE DIFFERENTIAL-GEAR DRIVE TO TRASMIT ROTATION SHAFT AND THE DIFFERENTIAL-GEAR DRIVE TO THE COMPRESSOR SHAFT FOR DRIVING THE LATTER IN ITS NORMAL OPERATING DIRECTION WHILE ALLOWING THE COMPRESSOR SHAFT TO EXCEED THE SPEED OF ROTATION THUS TRANSMITTED.
Claim 2
Dependent Claim
126 words
A TURBINE-OPERATED ENGINE STARTER COMPRISING: A GAS TURBINE HAVING A TURBINE SHAFT AND A COMBUSTION CHAMBER; A TURBO-COMPRESSOR FOR SUPPLYING AIR TO SAID COMBUSTION CHAMBER, SAID COMPRESSOR INCLUDING A COMPRESSOR SHAFT HAVING A NORMAL DIRECTION OF ROTATION; A STARTER OUTPUT SHAFT; A THREE-LEG DIRRERENTIAL GEAR DRIVE HAVING ITS THREE LEGS OPERATIVELY CONNECTED RESPECTIVELY TO SAID TURBINE SHAFT, SAID COMPRESSOR SHAFT, AND SAID OUTPUT SHAFT; AN AUXILIARY STARTER MOTOR; DRIVE MEANS OPERATIVELY CONNECTING SAID AUXILIARY MOTOR WITH SAID COMPRESSOR SHAFT; AND AN OVER-RUNNING CLUTCH INTERPOSED BETWEEN THE COMPRESSOR SHAFT AND THE DIFFERENTIAL-GEAR DRIVE TO TRASMIT ROTATION SHAFT AND THE DIFFERENTIAL-GEAR DRIVE TO THE COMPRESSOR SHAFT FOR DRIVING THE LATTER IN ITS NORMAL OPERATING DIRECTION WHILE ALLOWING THE COMPRESSOR SHAFT TO EXCEED THE SPEED OF ROTATION THUS TRANSMITTED.
References Cited (Backward Citations)
US2999356A
Cited
US3063242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |