Patent US1725454A successfully refreshed from Google Patents.
US3867059A
Expired / Lapsed
US
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Reversible multi-stage hydraulic machine
Assignee: Sulzer Escher Wyss AG
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Filing: 1973-10-29
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Granted: 1975-02-18
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Expires: 1993-10-29
Abstract
Abstract A reversible multi-stage hydraulic machine having a minimum of three stages where the wheels are disposed on a common shaft; one of the wheels is disposed with its suction aperture directed on the opposite side to the suction apertures of the wheels of the other stages and is arranged back to back to its adjacent wheel; jointly and simultaneously regulable distributors are arranged each on the periphery of the wheels arranged each other back to back; a set of obturators in the machine makes it possible for at least one stage to be put out of action.
Inventors
- 👤 Michel Fauconnet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:32
CPC Classifications
F; F03; F03B; F03B13/00; F03B13/06; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y02E60/00; Y02E60/16; Y10; Y10S; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
A reversible hydraulic machine including a. a pump-turbine part having at least two stages, and a pump part having at least one stage, b. each stage including an impeller, and the impellers being coupled to a common shaft, c. the impellers of said two stages of the pump-turbine part being arranged in juxtaposition and back-to-back with their suction apertures facing in opposite directions; d. two sets of distributors with adjustable stator blades, one being associated with each of said two stages of the pumpturbine part; e. common regulating means for simultaneously adjusting the setting of both sets of blades; and f. passage means interconnecting the stages and containing obturator means for selectively putting out of action the pump part, g. the obturator means having a first setting in which it causes water being pumped to flow from a suction tube to a spiral casing of the machine through a path which leads serially through one stage of the pump-turbine, the pump, and the other stage of the pump-turbine, and a second setting in which it causes water acting as power medium to flow from the spiral casing to the suction tube of the machine through a part which leads serially through said two stages of the pump-turbine part and is isolated from the pump part.
Claim 2
Dependent Claim
215 words
A reversible hydraulic machine including a. a pump-turbine part having at least two stages, and a pump part having at least one stage, b. each stage including an impeller, and the impellers being coupled to a common shaft, c. the impellers of said two stages of the pump-turbine part being arranged in juxtaposition and back-to-back with their suction apertures facing in opposite directions; d. two sets of distributors with adjustable stator blades, one being associated with each of said two stages of the pumpturbine part; e. common regulating means for simultaneously adjusting the setting of both sets of blades; and f. passage means interconnecting the stages and containing obturator means for selectively putting out of action the pump part, g. the obturator means having a first setting in which it causes water being pumped to flow from a suction tube to a spiral casing of the machine through a path which leads serially through one stage of the pump-turbine, the pump, and the other stage of the pump-turbine, and a second setting in which it causes water acting as power medium to flow from the spiral casing to the suction tube of the machine through a part which leads serially through said two stages of the pump-turbine part and is isolated from the pump part.
Claim 3
Dependent Claim
17 words
A machine as defined in claim 1 in which the obtruator means includes a reciprocable sleeve valve.
Claim 4
Dependent Claim
124 words
A machine as defined in claim 2 in which a. the passage means includes a first passage which connects the periphery of one impeller of the pump-turbine part with the suction aperture of the other impeller of that part, and second and third passages which connect the suction aperture and periphery, respectively, of the impeller of the pump part with spaced points along the first passage; and b. said sleeve valve is of the double-acting type and has a first position in which it opens the first passage and closes the second passage, and a second position in which it closes the first passage at a location intermediate the junctions of this passage with the second and third passages and opens the second passage.
Claim 5
Dependent Claim
16 words
A machine as defined in claim 1 in which the obturator means includes a rotary valve.
Claim 6
Dependent Claim
96 words
A machine as defined in claim 4 in which a. the passage means includes a first passage connected with the periphery of the first impeller of the pump-turbine part, a second passage connected with the suction aperture of the other impeller of the pump-turbine part, and a third passage connected with the suction aperture of the impeller of the pump part, these passages leading to the rotary valve; and b. said rotary valve is of the double-acting type and has two positions in which, respectively, it connects the first passage with the second and third passages.
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |