US3871792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump system and valve assembly therefor
Assignee: Jacuzzi Brothers Inc
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Filing: 1973-11-28
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Granted: 1975-03-18
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Expires: 1993-11-28
Abstract
Abstract The invention relates to an automatic pump system, primarily for supplying water under constant pressure, wherein a valve which isolates the pressure switch following energization of the pump motor, is closed by application of hydraulic pressure directly thereto from the pump and a main valve in the system is by-passed to provide a sharp drop in differential pressure across said main valve to assure stable operation of the pressure switch isolating valve.
Inventors
- 👤 Darrell D Gritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:53
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; F04B49/022; E; E03; E03B; E03B11/00; F04B49/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
235 words
A pump system comprising a pump, an electric motor in drive connection with said pump, a service line, a service valve in said service line, a pressure switch in electric circuit with said motor, and a control valve assembly comprising a valve housing having an input opening for flow connection thereto of said pump, a discharge opening for flow connection to said serviCe line, and a main flow passageway interconnecting said input opening and said discharge opening, a main valve spanning said main passageway, means biasing said main valve toward closing position, a first auxiliary passageway flow connecting at one end with said main passageway on the downstream side of said main valve and terminating in an opening in said housing for hydraulic pressure connection to said pressure switch, means coupling said pressure switch to said valve housing at said last opening, a pilot valve assembly spanning said first auxiliary passageway and including a valve seat and a valve means normally biasing said pilot valve toward open condition, and a second auxiliary passageway, said second auxiliary passageway flow connecting at one end to said main passageway on the upstream side of said main valve and terminating at said pilot valve in pressure opposing relationship to said biasing means, whereby development of hydraulic pressure against said valve in excess of any opposing pressure against said valve will close said valve and block said first auxiliary passageway.
Claim 2
Dependent Claim
235 words
A pump system comprising a pump, an electric motor in drive connection with said pump, a service line, a service valve in said service line, a pressure switch in electric circuit with said motor, and a control valve assembly comprising a valve housing having an input opening for flow connection thereto of said pump, a discharge opening for flow connection to said serviCe line, and a main flow passageway interconnecting said input opening and said discharge opening, a main valve spanning said main passageway, means biasing said main valve toward closing position, a first auxiliary passageway flow connecting at one end with said main passageway on the downstream side of said main valve and terminating in an opening in said housing for hydraulic pressure connection to said pressure switch, means coupling said pressure switch to said valve housing at said last opening, a pilot valve assembly spanning said first auxiliary passageway and including a valve seat and a valve means normally biasing said pilot valve toward open condition, and a second auxiliary passageway, said second auxiliary passageway flow connecting at one end to said main passageway on the upstream side of said main valve and terminating at said pilot valve in pressure opposing relationship to said biasing means, whereby development of hydraulic pressure against said valve in excess of any opposing pressure against said valve will close said valve and block said first auxiliary passageway.
Claim 3
Dependent Claim
50 words
A pump system in accordance with claim 1, characterized by by-pass flow means in by-pass relationship to said main valve to preclude blocking of said main passageway upon seating of said main valve and introduce a sharp drop in differential pressure across said main valve upon seating of said valve.
Claim 4
Dependent Claim
22 words
A pump system in accordance with claim 1, characterized by said by-pass means including at least one notch through said main valve.
Claim 5
Dependent Claim
53 words
A pump system in accordance with claim 1, characterized by said pilot valve comprising a diaphragm, with said biasing means exerting pressure against one side of said diaphragm valve in the direction of lifting the same from its seat and said second auxiliary passageway terminating at the opposite side of said diaphragm valve.
Claim 6
Dependent Claim
51 words
A pump system in accordance with claim 4, characterized by by-pass flow means in by-pass relationship to said main valve to preclude blocking of said main passageway upon seating of said main valve and introduce a sharp drop in differential pressure across said main valve upon such seating of said valve.
Claim 7
Dependent Claim
35 words
A pump system in accordance with claim 5, characterized by said biasing means being pressure calibrated to cause opening of said pilot valve assembly at a differential pressure generated following seating of said main valve.
Claim 8
Dependent Claim
123 words
A valve assembly for a pump system, comprising a housing having a main passageway therethrough, a main valve spanning said main passageway, means normally biasing said main valve toward closing position, a first auxiliary passageway in said housing extending from said main passageway on one side of said main valve, to an external opening in said housing adapted for coupling thereto of a pressure switch, a pilot valve assembly spanning said first auxiliary passageway and including a pilot valve, means normally biasing said pilot valve to open position, and means for transmitting pressure hydraulically from said main passageway on the other side of said main valve, to said pilot valve in opposition to said biasing means, to pressure said pilot valve toward closing.
Claim 9
Dependent Claim
123 words
A valve assembly for a pump system, comprising a housing having a main passageway therethrough, a main valve spanning said main passageway, means normally biasing said main valve toward closing position, a first auxiliary passageway in said housing extending from said main passageway on one side of said main valve, to an external opening in said housing adapted for coupling thereto of a pressure switch, a pilot valve assembly spanning said first auxiliary passageway and including a pilot valve, means normally biasing said pilot valve to open position, and means for transmitting pressure hydraulically from said main passageway on the other side of said main valve, to said pilot valve in opposition to said biasing means, to pressure said pilot valve toward closing.
Claim 10
Dependent Claim
53 words
A valve assembly for a pump system in accordance with claim 7 characterized by by-pass means in by-pass relationship to said main valve to preclude blocking of said main passageway upon seating of said main valve and introduce a sharp drop in differential pressure across said main valve upon seating of said valve.
Claim 11
Dependent Claim
26 words
A valve assembly for a pump system in accordance with claim 7, characterized by said by-pass means including at least one notch through said main valve.
Claim 12
Dependent Claim
57 words
A valve assembly for a pump system in accordance with claim 7, characterized by said pilot valve comprising a diaphragm, with said biasing means exerting pressure against one side of said diaphragm valve in the direction of lifting the same from its seat and said second auxiliary passagewy terminating at the opposite side of said diaphragm valve.
Claim 13
Dependent Claim
27 words
A valve assembly for a pump system in accordance with claim 10, characterized by means limiting tensioning of said diaphragm valve following seating thereof against its seta.
Claim 14
Dependent Claim
56 words
A valve assembly for a pump system in accordance with claim 10, characterized by by-pass flow means in by-pass relationship to said main valve to preclude blocking of said main passagewy upon seating of said main valve and introduce a sharp drop in differential pressure across said main valve upon such seating of said main valve.
Claim 15
Dependent Claim
39 words
A valve assembly for a pump system in accordance with claim 12, characterized by said biasing means being pressure calibrated to cause opening of said pilot valve assembly at a differential pressure generated following seating of said main valve.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |