US3692430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid pumping system
Assignee: Individual
•
Filing: 1971-06-18
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Granted: 1972-09-19
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Expires: 1991-06-18
Abstract
Abstract A system for pumping liquid as the liquid is being drawn from a dispensing line of the system by a pump having a prescribed pumping rate. The system is so constructed that the pump will stay on continuously while the liquid is being drawn from the system despite the fact that the pump is pumping the liquid at a greater rate than the liquid is being drawn through the dispensing line.
Inventors
- 👤 John W Timmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:23
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/24; F04C14/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
205 words
A fluid pumping system comprising: a pump, having an inlet and an outlet, so constructed as to be actuable to pump fluid at a first prescribed rate through the outlet; a supply line, extending to a source of fluid, in communication with the inlet; a dispensing line, in communication with the inlet; a dispensing line, in communication with the outlet, through which the fluid may be drawn to a place of use; an actuating mechanism, interposed between the outlet and the dispensing line, so connected to the pump as to cause the pump to start when the pressure between the outlet and the dispensing line is below a prescribed lower limit and to cause the pump to stop when said pressure exceeds a prescribed upper limit; a normally closed pressure relief valve, interposed between the outlet and the inlet, so constructed as to open in response to the application of said pressure at a level between said upper and lower limits; and a flow control valve, interposed between the outlet and the inlet and in communication with the pressure relief valve, so constructed as to permit the flow of the fluid therethrough at a second prescribed rate that is less than said first prescribed rate.
Claim 2
Dependent Claim
205 words
A fluid pumping system comprising: a pump, having an inlet and an outlet, so constructed as to be actuable to pump fluid at a first prescribed rate through the outlet; a supply line, extending to a source of fluid, in communication with the inlet; a dispensing line, in communication with the inlet; a dispensing line, in communication with the outlet, through which the fluid may be drawn to a place of use; an actuating mechanism, interposed between the outlet and the dispensing line, so connected to the pump as to cause the pump to start when the pressure between the outlet and the dispensing line is below a prescribed lower limit and to cause the pump to stop when said pressure exceeds a prescribed upper limit; a normally closed pressure relief valve, interposed between the outlet and the inlet, so constructed as to open in response to the application of said pressure at a level between said upper and lower limits; and a flow control valve, interposed between the outlet and the inlet and in communication with the pressure relief valve, so constructed as to permit the flow of the fluid therethrough at a second prescribed rate that is less than said first prescribed rate.
Claim 3
Dependent Claim
23 words
The system as defined in claim 1 wherein the flow control valve is interposed between the pressure relief valve and the supply line.
Claim 4
Dependent Claim
20 words
The system as defined in claim 1 further comprising a pressure tank interposed between the outlet and the dispensing line.
Claim 5
Dependent Claim
23 words
The system as defined in claim 3 wherein the flow control valve is interposed between the pressure relief valve and the supply line.
Claim 6
Dependent Claim
50 words
The system as defined in claim 1 further comprising: a manifold having a first portion in communication with the inlet and a second portion in communication with the outlet; and means mounting the pressure relief valve and the flow control valve in the manifold between said first and second portions.
Claim 7
Dependent Claim
31 words
The system as defined in claim 5 wherein the flow control valve is so mounted in the manifold as to be interposed between the pressure relief valve and the supply line.
Claim 8
Dependent Claim
22 words
The system as defined in claim 5 further comprising a pressure tank interposed between said second manifold portion and the dispensing line.
Claim 9
Dependent Claim
31 words
The system as defined in claim 7 wherein the flow control valve is so mounted in the manifold as to be interposed between the pressure relief valve and the supply line.
References Cited (Backward Citations)
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US3141475A
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US3150684A
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US3295450A
Cited
US3343217A
Cited
US3547559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |