US3722213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear train for gas turbine engines
Assignee: Caterpillar Inc
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Filing: 1971-01-25
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Granted: 1973-03-27
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Expires: 1991-01-25
Abstract
Abstract A triple lay shaft gear train for a two-shaft gas turbine engine. The gear train includes a lay shaft mounted overrunning clutch which permits a uni-directional lock-up of the power turbine and gasifier turbine when synchronous speeds have been reached and a positive lock-up coupling means which permits selective bi-directional lock-up of the lay shafts to provide the advantages of both single-shaft and two-shaft turbine operation. The gasifier turbine and power turbine are capable of different rotational speeds.
Inventors
- 👤 C Carter
- 👤 L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:25
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
In a two-shaft gas turbine engine having a gasifier turbine mounted for rotation upon a first shaft means and a power turbine mounted for rotation upon a second shaft means and having three lay shaft means for each of said first and second shaft means; first means associated with each of said lay shaft means for selectively coupling said first shaft means and said second shaft means in a positive, bidirectional lock-up during rotation of said first and second shaft means, said first means including gear means operatively associated with each of said first and second shaft means and a selectively actuated coupling collar means having spline means which directly coact with spline means on said gear means, pressure-actuated piston means for positively moving said coupling collar spline means into engagement with said spline means on said gear means, and second means including an overrunning clutch for coupling said first shaft means and said second shaft means in response to the achievement of synchronous speed between said first and second shaft means.
Claim 2
Dependent Claim
172 words
In a two-shaft gas turbine engine having a gasifier turbine mounted for rotation upon a first shaft means and a power turbine mounted for rotation upon a second shaft means and having three lay shaft means for each of said first and second shaft means; first means associated with each of said lay shaft means for selectively coupling said first shaft means and said second shaft means in a positive, bidirectional lock-up during rotation of said first and second shaft means, said first means including gear means operatively associated with each of said first and second shaft means and a selectively actuated coupling collar means having spline means which directly coact with spline means on said gear means, pressure-actuated piston means for positively moving said coupling collar spline means into engagement with said spline means on said gear means, and second means including an overrunning clutch for coupling said first shaft means and said second shaft means in response to the achievement of synchronous speed between said first and second shaft means.
References Cited (Backward Citations)
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US3237404A
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US3498057A
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US3481145A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |