US3582667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of starting hydraulic turbine generators
Assignee: Voith Hydro Inc
•
Filing: 1968-10-17
•
Granted: 1971-06-01
•
Expires: 1988-10-17
Abstract
Abstract The method of starting a hydraulic turbine generator with a valve located in the draft tube of the turbine.
Inventors
- 👤 Howard A Mayo Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:11
CPC Classifications
F; F03; F03B; F03B15/00; F03B15/02; F03B15/04; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
The method of starting a hydraulic turbine generator with a valve located in the turbine draft tube downstream from the runner comprising the steps of: partially opening said draft tube valve to permit water to flow through said draft tube and cause rotation of said runner; continuing to open said draft tube valve until the turbine generator has reached synchronous speed; putting said generator on line; and completely opening said valve.
Claim 2
Independent Claim
71 words
The method of starting a hydraulic turbine generator with a valve located in the turbine draft tube downstream from the runner comprising the steps of: partially opening said draft tube valve to permit water to flow through said draft tube and cause rotation of said runner; continuing to open said draft tube valve until the turbine generator has reached synchronous speed; putting said generator on line; and completely opening said valve.
Claim 3
Dependent Claim
15 words
The method set forth in claim 1 wherein said turbine is of the propeller type.
Claim 4
Dependent Claim
16 words
The method set forth in claim 1 wherein said draft tube valve is a gate valve.
Claim 5
Dependent Claim
21 words
The method as set forth in claim 1 wherein said turbine runner is located below the level of the turbine tailwater.
Claim 6
Dependent Claim
21 words
The method set forth in claim 1 wherein said draft tube gate is located below the level of the turbine tailwater.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |