Patent US5108458A successfully refreshed from Google Patents.
Patent US3602611A successfully refreshed from Google Patents.
US3602611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump assembly composed of two pump units arranged in a casing
Assignee: Individual
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Filing: 1969-11-12
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Granted: 1971-08-31
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Expires: 1989-11-12
Abstract
Abstract There is disclosed a pump assembly composed of two pump units which are separately capable of being driven and which are arranged in a casing provided with one inlet and one outlet only, said pump assembly being characterized by the intake sockets of the pump units being disposed at locations of which one is downstream of the other at a duct means coextensive from the inlet to the outlet of said casing, the pressure side of each pump unit opening into the same cut means respectively downstream of the associated intake sockets thereof, and a means being provided at the discharge of each pump unit preventing a backflow of the fluid pumped by said pump unit in said duct means.
Inventors
- 👤 Jochen Oplander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:19
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/12; F04D13/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
A pump assembly, compriSing a casing having an inlet and an outlet and a passage connecting said inlet and said outlet for flow of fluid from the former to the latter; a pair of pump units communicating with said passage at longitudinally spaced portions thereof, each of said pump units having an intake opening and a discharge opening of which the latter communicates with said passage downstream of the former; and closure means in the region of said discharge opening of each of said pump units for preventing the backflow of fluid discharged from the respective discharge opening, said closure means comprising respective flaps each mounted for movement under the influence of fluid pumped by the associated pumping unit from one terminal position blocking the respective discharge opening to an other terminal position unblocking such discharge opening and blocking said passage intermediate the respective discharge opening and the associated intake opening.
Claim 2
Dependent Claim
151 words
A pump assembly, compriSing a casing having an inlet and an outlet and a passage connecting said inlet and said outlet for flow of fluid from the former to the latter; a pair of pump units communicating with said passage at longitudinally spaced portions thereof, each of said pump units having an intake opening and a discharge opening of which the latter communicates with said passage downstream of the former; and closure means in the region of said discharge opening of each of said pump units for preventing the backflow of fluid discharged from the respective discharge opening, said closure means comprising respective flaps each mounted for movement under the influence of fluid pumped by the associated pumping unit from one terminal position blocking the respective discharge opening to an other terminal position unblocking such discharge opening and blocking said passage intermediate the respective discharge opening and the associated intake opening.
Claim 3
Dependent Claim
144 words
A pump assembly, comprising a casing having an inlet and an outlet, and a passage connecting said inlet and said outlet for flow of fluid from the former to the latter; a pair of pump units communicating with said passage at longitudinally spaced portions thereof, each of said pump units having an intake opening and a discharge opening of which the latter communicates with said passage downstream of the former; and closure means in the region of said discharge opening of each of said pump units for preventing the backflow of fluid discharged from the respective discharge opening said closure means comprising respective flaps each associated with one of said pump units and mounted downstream of said intake opening thereof for movement between one terminal position blocking the associated discharge opening and an other terminal position unblocking such discharge opening and blocking said passage.
Claim 4
Dependent Claim
144 words
A pump assembly, comprising a casing having an inlet and an outlet, and a passage connecting said inlet and said outlet for flow of fluid from the former to the latter; a pair of pump units communicating with said passage at longitudinally spaced portions thereof, each of said pump units having an intake opening and a discharge opening of which the latter communicates with said passage downstream of the former; and closure means in the region of said discharge opening of each of said pump units for preventing the backflow of fluid discharged from the respective discharge opening said closure means comprising respective flaps each associated with one of said pump units and mounted downstream of said intake opening thereof for movement between one terminal position blocking the associated discharge opening and an other terminal position unblocking such discharge opening and blocking said passage.
Claim 5
Dependent Claim
126 words
A pump assembly, comprising a casing having an inlet and an outlet, and a passage connecting said inlet with said outlet for flow of fluid from the former to the latter, a pair of pump units communicating with said passage at longitudinally spaced portions thereof, each of said pump units having an intake opening and a discharge opening of which the latter communicates with said passage downstream of the former; and respective means, operative in the manner of a jet pump and each having a nozzle portion receiving fluid from a respective discharge opening for discharging such fluid along and in downstream direction of said passage and a flow-constricting portion surrounding the nozzle portion, for preventing a backflow of fluid pumped by the respective pump units.
Claim 6
Dependent Claim
126 words
A pump assembly, comprising a casing having an inlet and an outlet, and a passage connecting said inlet with said outlet for flow of fluid from the former to the latter, a pair of pump units communicating with said passage at longitudinally spaced portions thereof, each of said pump units having an intake opening and a discharge opening of which the latter communicates with said passage downstream of the former; and respective means, operative in the manner of a jet pump and each having a nozzle portion receiving fluid from a respective discharge opening for discharging such fluid along and in downstream direction of said passage and a flow-constricting portion surrounding the nozzle portion, for preventing a backflow of fluid pumped by the respective pump units.
Claim 7
Dependent Claim
30 words
A pump assembly as defined in claim 2, said pump units each having a drive shaft, and wherein said drive shafts are located in a plane common to them both.
Claim 8
Dependent Claim
25 words
A pump assembly as defined in claim 2, said pump units each having a drive shaft which extends normal to the elongation of said passage.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |