US3841173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine drive
Assignee: Excelermatic Inc
•
Filing: 1973-05-07
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Granted: 1974-10-15
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Expires: 1993-05-07
Abstract
Abstract A gas turbine engine drive includes a flywheel coupled to the turbine through an infinitely variable speed transmission whose transmission ratio is varied so as to permit energy stored in the flywheel to be transmitted to the turbine during acceleration of the turbine to prevent turbine stalling.
Inventors
- 👤 C Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:22
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/36; F16; F16H; F16H33/00; F16H33/02; F16H2706/00; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
137 words
A gas tUrbine drive for driving a rapidly variable load, comprising: a gas turbine engine including a gas turbine and a compressor having a common shaft, said gas turbine engine having an operational speed range between full speed and a lower idle speed; a flywheel coupled to said gas turbine for storage of energy; an infinitely variable speed transmission disposed as a power transmission link between the gas turbine engine and the flywheel for the exchange of energy between said flywheel and the gas turbine engine; control means for changing the transmission ratio of said infinitely variable speed transmission such that the flywheel speed is decreased as the gas turbine engine speed is increased and the flywheel speed is increased as the turbine speed decreases; and means operatively connecting said gas turbine engine to said variable load.
Claim 2
Dependent Claim
137 words
A gas tUrbine drive for driving a rapidly variable load, comprising: a gas turbine engine including a gas turbine and a compressor having a common shaft, said gas turbine engine having an operational speed range between full speed and a lower idle speed; a flywheel coupled to said gas turbine for storage of energy; an infinitely variable speed transmission disposed as a power transmission link between the gas turbine engine and the flywheel for the exchange of energy between said flywheel and the gas turbine engine; control means for changing the transmission ratio of said infinitely variable speed transmission such that the flywheel speed is decreased as the gas turbine engine speed is increased and the flywheel speed is increased as the turbine speed decreases; and means operatively connecting said gas turbine engine to said variable load.
Claim 3
Dependent Claim
20 words
An gas turbine drive as claimed in claim 1, wherein said infinitely variable speed transmission is a friction wheel transmission.
Claim 4
Dependent Claim
30 words
An gas turbine drive as claimed in claim 1, wherein the relative speeds of the turbine and the flywheel between idle and full speed are the inverse of one another.
Claim 5
Dependent Claim
18 words
An gas turbine drive as claimed in claim 1, wherein the turbine is coupled to a vehicle drive.
Claim 6
Dependent Claim
22 words
An arrangement as claimed in claim 4, wherein the turbine is coupled to the vehicle drive through an infinitely variable speed transmission.
Claim 7
Dependent Claim
74 words
A gas turbine drive as claimed in claim 1, wherein the transmission ratio range is essentially larger than S1/S2 if S2 is full turbine speed and S1 is idle speed of the turbine, said control means providing the highest transmission ratio at turbine idle speed and the lowest transmission ratio at full turbine speed so that the flywheel has its lowest speed at full turbine speed and its highest speed at turbine idle speed.
Claim 8
Dependent Claim
34 words
An gas turbine drive as claimed in claim 6, wherein turbine idle speed is about 50 percent of full turbine speed and the ratio range of the infinitely variable speed transmission is about 4:1.
Claim 9
Dependent Claim
57 words
An gas turbine drive as claimed in claim 6, wherein means are provided to retain the transmission ratio at its lowest value during startup of the turbine at least until the turbine has reached self-sustaining speed whereupon a change to the highest transmission ratio is permitted to bring the flywheel to full speed at turbine idle speed.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |