Patent US3237564A successfully refreshed from Google Patents.
US3237564A
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Hydraulic pumps and reversible pump turbines
Assignee: English Electric Co Ltd
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Filing: 1963-10-07
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Granted: 1966-03-01
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Expires: 1983-10-07
Abstract
No abstract record available.
Inventors
- 👤 Hartland Derek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:44
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/16; F03B3/18; F03B3/183; F03B11/00; F03B11/004; F03B13/00; F03B13/06; F03B15/00; F03B15/005; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y02E60/00; Y02E60/16; Y10; Y10S; Y10S100/00; Y10S100/901; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A HYDRAULIC MACHINE COMPRISING A CASING, AN IMPELLER MOUNTED FOR ROTATION IN SAID CASING, A SUCTION TUBE MOUNTED ON SAID CASING UPSTREAM OF SAID IMPELLER FOR CONNECTION TO A LIQUID RESERVOIR, MEANS FOR INTRODUCING GAS INTO SAID IMPELLER, MEANS FOR CONTROLLING THE PRESSURE OF SAID GAS IN SAID IMPELLER WHEREBY TO CONTROL THE ADVANCE OF SAID LIQUID ALONG THE SUCTION TUBE TOWARDS THE IMPELLER, AND VALVE MEANS IN SAID SUCTION TUBE FOR ADJUSTING THE CROSSSECTIONAL AREA OF THE LIQUID FLOW PATH WITHIN SAID SUCTION TUBE.
Claim 2
Dependent Claim
85 words
A HYDRAULIC MACHINE COMPRISING A CASING, AN IMPELLER MOUNTED FOR ROTATION IN SAID CASING, A SUCTION TUBE MOUNTED ON SAID CASING UPSTREAM OF SAID IMPELLER FOR CONNECTION TO A LIQUID RESERVOIR, MEANS FOR INTRODUCING GAS INTO SAID IMPELLER, MEANS FOR CONTROLLING THE PRESSURE OF SAID GAS IN SAID IMPELLER WHEREBY TO CONTROL THE ADVANCE OF SAID LIQUID ALONG THE SUCTION TUBE TOWARDS THE IMPELLER, AND VALVE MEANS IN SAID SUCTION TUBE FOR ADJUSTING THE CROSSSECTIONAL AREA OF THE LIQUID FLOW PATH WITHIN SAID SUCTION TUBE.
References Cited (Backward Citations)
CH105312A
Cited
US2161182A
Cited
CH216493A
Cited
US2262191A
Cited
US2295495A
Cited
US2371983A
Cited
US2441708A
Cited
US2443263A
Cited
US2580384A
Cited
GB694127A
Cited
FR1138519A
Cited
US3047267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |