US3275293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for controlling the closing operation of water shut-off means of a water pump-turbine
Assignee: Hitachi Ltd
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Filing: 1964-07-06
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Granted: 1966-09-27
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Expires: 1984-07-06
Abstract
No abstract record available.
Inventors
- 👤 Hosogai Takashi
- 👤 Ebisawa Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:49
CPC Classifications
F; F03; F03B; F03B15/00; F03B15/02; F03B15/04; F03B15/06; F03B15/08; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10S; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A CONTROL DEVICE FOR CONTROLLING THE CLOSING OPERATION OF WATER-SHUT-OFF MEANS OF A WATER PUMP-TURBINE DEVICE, COMPRISING: WATER SHUT-OFF FOR SAID PUMP-TURBINE DEVICE, FIRST CONTROL MEANS OPERATIVELY CONNECTED WITH SAID WATER SHUT-OFF MEANS TO CONTROL THE CLOSING CHARACTERISTICS OF SAID WATER SHUT-OFF MEANS UNDER PUMP OPERATION OF THE PUMP-TURBINE DEVICE, SECOND CONTROL MEANS OPERATIVELY CONNECTED WITH SAID WATER SHUT-OFF MEANS FOR CONTROLLING THE CLOSING CHARACTERISTIC THEREOF UNDER TURBING OPERATION OF SAID PUMP-TURBINE DEVICE, SELECTING MEANS OPERATIVELY CONNECTED WITH SAID FIRST AND SECOND CONTROL MEANS FOR SELECTIVELY RENDERING EFFECTIVE EITHER SAID FIRST OR SAID SECOND CONTROL MEANS IN ACCORDANCE WITH THE OPERATING CONDITION OF THE PUMP-TURBINE DEVICE AND ACTUATING MEANS OPERATIVELY CONNECTING SAID FIRST AND SECOND CONTROL MEANS WITH SAID WATER SHUT-OFF MEANS FOR ACTUATING SAID WATER CUT-OFF MEANS BY THE ONE OF SAID FIRST AND SECOND CONTROL MEANS SELECTED BY SAID SELECTING MEANS.
Claim 2
Dependent Claim
143 words
A CONTROL DEVICE FOR CONTROLLING THE CLOSING OPERATION OF WATER-SHUT-OFF MEANS OF A WATER PUMP-TURBINE DEVICE, COMPRISING: WATER SHUT-OFF FOR SAID PUMP-TURBINE DEVICE, FIRST CONTROL MEANS OPERATIVELY CONNECTED WITH SAID WATER SHUT-OFF MEANS TO CONTROL THE CLOSING CHARACTERISTICS OF SAID WATER SHUT-OFF MEANS UNDER PUMP OPERATION OF THE PUMP-TURBINE DEVICE, SECOND CONTROL MEANS OPERATIVELY CONNECTED WITH SAID WATER SHUT-OFF MEANS FOR CONTROLLING THE CLOSING CHARACTERISTIC THEREOF UNDER TURBING OPERATION OF SAID PUMP-TURBINE DEVICE, SELECTING MEANS OPERATIVELY CONNECTED WITH SAID FIRST AND SECOND CONTROL MEANS FOR SELECTIVELY RENDERING EFFECTIVE EITHER SAID FIRST OR SAID SECOND CONTROL MEANS IN ACCORDANCE WITH THE OPERATING CONDITION OF THE PUMP-TURBINE DEVICE AND ACTUATING MEANS OPERATIVELY CONNECTING SAID FIRST AND SECOND CONTROL MEANS WITH SAID WATER SHUT-OFF MEANS FOR ACTUATING SAID WATER CUT-OFF MEANS BY THE ONE OF SAID FIRST AND SECOND CONTROL MEANS SELECTED BY SAID SELECTING MEANS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |