US3738776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping device, especially for water supply
Assignee: EQUIP MENAGEN SOC FR
•
Filing: 1971-08-02
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Granted: 1973-06-12
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Expires: 1991-08-02
Abstract
Abstract The invention relates to a pumping device comprising a pump driven by a motor, a diaphragm which is subjected to the water pressure downstream of the pump and a contactor which is actuated by the diaphragm for the purpose of controlling the motor. The pump is of the gear type and a check-valve is placed upstream of the diaphragm in the distribution line which is supplied by the pump. The invention is of particular interest for the supply of water to caravans, bungalows or like premises.
Inventors
- 👤 J Debare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:19
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/06; F04C15/00; F04C15/0053
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
147 words
A pumping device for liquid supply, comprising a gear pump, an electric motor driving said gear pump, a distribution system fed with liquid by said pump, said distribution system comprising a pressure-sensing diaphragm downstream of the pump and subjected to liquid pressure downstream of the pump, an electric contactor actuated by said pressure-sensing diaphragm to control said motor, and a single check valve located downstream of said pump and uPstream of said pressure-sensing diaphragm, said check valve being mounted in a chamber of a first body which is integral with a body in which said gear pump is housed, said chamber being closed by said pressure-sensing diaphragm and communicating with a passageway which is connected to the pump and which is adapted to be closed by said check valve, said check valve having a restoring member which is secured to a perforated plate mounted adjacent the diaphragm.
Claim 2
Dependent Claim
147 words
A pumping device for liquid supply, comprising a gear pump, an electric motor driving said gear pump, a distribution system fed with liquid by said pump, said distribution system comprising a pressure-sensing diaphragm downstream of the pump and subjected to liquid pressure downstream of the pump, an electric contactor actuated by said pressure-sensing diaphragm to control said motor, and a single check valve located downstream of said pump and uPstream of said pressure-sensing diaphragm, said check valve being mounted in a chamber of a first body which is integral with a body in which said gear pump is housed, said chamber being closed by said pressure-sensing diaphragm and communicating with a passageway which is connected to the pump and which is adapted to be closed by said check valve, said check valve having a restoring member which is secured to a perforated plate mounted adjacent the diaphragm.
Claim 3
Dependent Claim
25 words
A pumping device as claimed in claim 1, and a cover which maintains said diaphragm against the first-mentioned body, said cover containing said electric contactor.
References Cited (Backward Citations)
DE158828C
Cited
US2123651A
Cited
US2631540A
Cited
US2956507A
Cited
US3120814A
Cited
US3380468A
Cited
US3446238A
Cited
US3387105A
Cited
US3694105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |