Patent US3604446A successfully refreshed from Google Patents.
US3604446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Garrett Corp
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Filing: 1969-05-26
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Granted: 1971-09-14
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Expires: 1989-05-26
Abstract
Abstract A fluid valve having an internal bypass orifice and a spring biased piston to which the fluid pressure is applied. When the pressure is above a given value, the piston moves compressing the spring, first cutting off the flow through the bypass orifice and afterwards opening the valve port to channel the fluid to a place of use.
Inventors
- 👤 Glenn R Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:47
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/10; F16K17/105; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2579; Y10T137/2605; Y10T137/2612; Y10T137/2615; Y10T137/7722; Y10T137/7758; Y10T137/7762; Y10T137/7764; Y10T137/7766; Y10T137/7837; Y10T137/7838; Y10T137/7841
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
140 words
In a fluid supply system, a valve comprising: a housing having an inlet port, an outlet port, and a return port; first means for normally closing the passageway from said inlet port to said outlet port when the pressure of the fluid at the inlet port is below a given value; second means, including a metering means for making the fluid flow rate to said return port a function of the fluid pressure, for bypassing the fluid from said inlet port to said return port when said pressure is below said given value; and third means activated by the fluid pressure when the fluid pressure is above the given value for stopping the bypassing of fluid from said inlet port to said return port and for activating said first means to open the passageway between the inlet and outlet ports.
Claim 2
Dependent Claim
140 words
In a fluid supply system, a valve comprising: a housing having an inlet port, an outlet port, and a return port; first means for normally closing the passageway from said inlet port to said outlet port when the pressure of the fluid at the inlet port is below a given value; second means, including a metering means for making the fluid flow rate to said return port a function of the fluid pressure, for bypassing the fluid from said inlet port to said return port when said pressure is below said given value; and third means activated by the fluid pressure when the fluid pressure is above the given value for stopping the bypassing of fluid from said inlet port to said return port and for activating said first means to open the passageway between the inlet and outlet ports.
Claim 3
Dependent Claim
202 words
In the system of claim 1 wherein: said housing is provided with a cylindrical bore having one end closed and one end open with said ports communicating therewith; said outlet port being disposed at the closed end of said bore, said third means includes: a valve piston slidably disposed within said bore, and said piston having an axial opening; said first means includes: a valve plunger slidably dispOsed within said axial opening, a plug covering the open end of said bore, and a spring reacting between said piston and said plug for urging said piston against said plunger and said plunger against said outlet port, said inlet port is disposed at one end of the piston and the return port is disposed at the opposite end; and said valve plunger has a second passageway communicating one end of the piston with the other end to form said second means, the openings of said second passageway being disposed so that both are open when said spring urges said plunger against said outlet port and being disposed so that at least one opening is closed when the fluid pressure at said inlet port causes said piston to move against the action of said spring.
Claim 4
Dependent Claim
30 words
In the system of claim 2 wherein: another spring is disposed for action between said plunger and said plug to aid the urging of said plunger against said outlet port.
Claim 5
Dependent Claim
23 words
In the system of claims 2 or 4 wherein: an orifice is provided within said second passageway to control the flow rate therethrough.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |