US3700002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid supply system with motor operated pump actuated by switch controlled by on-off valve in system
Assignee: Aqua Marine Manufacturing Ltd
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Filing: 1971-01-04
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Granted: 1972-10-24
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Expires: 1991-01-04
Abstract
Abstract A liquid supply system includes a reservoir, a pipe connected to the reservoir and having a discharge end above the reservoir, a pump in the pipe between the reservoir and discharge end, a motor for driving the pump, a valve in the pipe between the pump and discharge end and a switch actuated by opening and closing of the valve for energizing and de-energizing the circuit that controls operation of the motor.
Inventors
- 👤 Colin Mcmaster Christie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:24
CPC Classifications
E; E03; E03B; E03B11/00; F; F04; F04B; F04B49/00; F04B49/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86035
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
312 words
A liquid supply system comprising a reservoir; a pump providing a limited output pressure and having a suction inlet and a discharge outlet; first pipe means connecting said reservoir and said suction inlet in fluid-flow relationship; second pipe means connected to said discharge outlet and having a discharge end located at a level above that of said reservoir; an electric motor connected to drive said pump; a motor control circuit for controlling operation of said motor; a manually operable valve device in said second pipe means for establishing and breaking fluid-flow communication between said discharge outlet of said pump and said discharge end of said second pipe means; an electric switch in said motor control circuit, said switch being actuable between first and second positions in one of which positions said switch is open and in the other of which positions said switch is closed to de-energize and energize said motor control circuit and said motor; and switch actuating means including means operable in response to movement of said valve device for actuating said switch from said first position to said second position, and means for actuating said switch from said second position to said first position; said switch, valve device and switch actuating means being so constructed and arranged that (a) said switch actuating means moves said switch from said one position into said other position prior to said valve device being moved sufficiently to establish fluid-flow communication between said discharge outlet of said pump and said discharge end of said second pipe means upon opening of said valve device and (b) said switch actuating means moves said switch from said other position to said one position after said valve device has been moved sufficiently to break fluid-flow communication between said discharge outlet of said pump and said discharge end of said second pipe means upon closing of said valve device.
Claim 2
Dependent Claim
312 words
A liquid supply system comprising a reservoir; a pump providing a limited output pressure and having a suction inlet and a discharge outlet; first pipe means connecting said reservoir and said suction inlet in fluid-flow relationship; second pipe means connected to said discharge outlet and having a discharge end located at a level above that of said reservoir; an electric motor connected to drive said pump; a motor control circuit for controlling operation of said motor; a manually operable valve device in said second pipe means for establishing and breaking fluid-flow communication between said discharge outlet of said pump and said discharge end of said second pipe means; an electric switch in said motor control circuit, said switch being actuable between first and second positions in one of which positions said switch is open and in the other of which positions said switch is closed to de-energize and energize said motor control circuit and said motor; and switch actuating means including means operable in response to movement of said valve device for actuating said switch from said first position to said second position, and means for actuating said switch from said second position to said first position; said switch, valve device and switch actuating means being so constructed and arranged that (a) said switch actuating means moves said switch from said one position into said other position prior to said valve device being moved sufficiently to establish fluid-flow communication between said discharge outlet of said pump and said discharge end of said second pipe means upon opening of said valve device and (b) said switch actuating means moves said switch from said other position to said one position after said valve device has been moved sufficiently to break fluid-flow communication between said discharge outlet of said pump and said discharge end of said second pipe means upon closing of said valve device.
Claim 3
Dependent Claim
21 words
A liquid supply system as claimed in claim 1 wherein said switch is actuated directly by movement of said valve device.
Claim 4
Dependent Claim
18 words
A liquid supply system as claimed in claim 2 wherein said switch is secured to said valve device.
Claim 5
Dependent Claim
28 words
A liquid supply system as claimed in claim 1 wherein said switch is actuated by means of a cam carried by a movable part of said valve device.
Claim 6
Dependent Claim
18 words
A liquid supply system as claimed in claim 4 wherein said valve device comprises a rotatable plug valve.
Claim 7
Dependent Claim
16 words
A liquid supply system as claimed in claim 1 wherein said pump is a centrifugal pump.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |