US3237564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic pumps and reversible pump turbines
Assignee: English Electric Co Ltd
•
Filing: 1963-10-07
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Granted: 1966-03-01
•
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 16:40
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.
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Cited
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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) | 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 |