Patent US4180374A successfully refreshed from Google Patents.
US4180374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well pump protection system
Assignee: Individual
•
Filing: 1978-03-07
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Granted: 1979-12-25
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Expires: 1998-03-07
Abstract
Abstract Disclosed herein is a protection system for a well pump in which a normal pressure switch is provided in series between this switch and the submerged motor and pump with a low pressure switch which has connected in parallel thereto a timing device which can in turn transmit directions to the pump, motor, control and starter to assure that a pump is not allowed to continue to run when there is no water in the well thereby causing a burnout. Check valves and a bleeder line are carefully positioned in this series to assure that the reading given by the low pressure switch, the normal pressure switch are real readings and that the pump is not inadvertenantly allowed to run due to incorrect signals derived therefrom.
Inventors
- 👤 Elliott R. Bristow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:29
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/02; F04D15/0209; F04D15/0218
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
187 words
A well pump protection system comprising a water outlet, a valve within said outlet, a storage tank having water and air connecting serially to said outlet, a pressure gauge connected to said pressure tank remote from said water outlet, and serially upstream, a normal pressure switch having means for allowing water to pass downstream, a low pressure switch provided with means to stop water flow downstream, a timing device connected in parallel to said low pressure switch to act as a time lag sequencing device, a bleeder line disposed proximate to said low pressure switch valve connecting said conduit to a well, a check valve disposed between the normal pressure switch and the low pressure switch permitting fluid flow solely in a downstream direction, a pressure pop off valve located upstream from said low pressure switch, a check valve located upstream from said pressure pop off valve allowing water to only flow downstream, and a submersible motor pump disposed in the well, and a pump motor control and starter connected in series to said low pressure switch and said timing device to activate said motor and pump.
Claim 2
Dependent Claim
187 words
A well pump protection system comprising a water outlet, a valve within said outlet, a storage tank having water and air connecting serially to said outlet, a pressure gauge connected to said pressure tank remote from said water outlet, and serially upstream, a normal pressure switch having means for allowing water to pass downstream, a low pressure switch provided with means to stop water flow downstream, a timing device connected in parallel to said low pressure switch to act as a time lag sequencing device, a bleeder line disposed proximate to said low pressure switch valve connecting said conduit to a well, a check valve disposed between the normal pressure switch and the low pressure switch permitting fluid flow solely in a downstream direction, a pressure pop off valve located upstream from said low pressure switch, a check valve located upstream from said pressure pop off valve allowing water to only flow downstream, and a submersible motor pump disposed in the well, and a pump motor control and starter connected in series to said low pressure switch and said timing device to activate said motor and pump.
Claim 3
Dependent Claim
53 words
The device of claim 1 in which said normal pressure switch includes a biased float ball disposed upon a seat, a piston biased against a contact bridge and contact elements at opposed extremities of said contact bridge to provide a continuous circuit when said contact bridge is in tangentical relation with said contacts.
Claim 4
Dependent Claim
38 words
The device of claim 2 in which said low pressure switch includes a valve connected to a contact bridge having biasing means disposed therebetween, and contact elements adapted to coact with said contact bridge to complete said circuit.
Claim 5
Dependent Claim
41 words
The device of claim 3 in which said timing device comprises a contact bridge adapted to coact with contact elements to complete a circuit, and a solenoid mechanism connected to said contact bridge to make and break the timing device circuit.
Claim 6
Dependent Claim
38 words
The device of claim 4 in which said pressure pop off valve comprises a flap valve connected to a rod element provided with biasing means and adjusting means to regulate the activating pressure of said pop off valve.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |