US3774628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure regulator
Assignee: Avco Corp
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Filing: 1971-09-24
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Granted: 1973-11-27
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Expires: 1991-09-24
Abstract
Abstract A pressure regulator for accurately regulating fluid pressure at extremely low levels, such as .300 psi, is disclosed. The pressure regulator accurately regulates fluid pressure above an ambient or a reference pressure over a wide range of inlet supply pressures. The pressure regulator has a valve and piston design which is insensitive to the supply pressure. A static pressure vent insures that variations in ambient or reference pressure will not adversely affect the operating pressure level. Adjustment means also permits fine tuning of the regulator to a desired operating level.
Inventors
- 👤 D Norton
- 👤 W Ancira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:34
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/08; F16K17/085; G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2612; Y10T137/2615; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7801; Y10T137/7822; Y10T137/7823; Y10T137/7825; Y10T137/8593; Y10T137/86493; Y10T137/86879; Y10T137/86895
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
322 words
A fluid pressure regulator operating at low output pressure levels over a wide range of input supply pressure levels comprising: a housing defining a supply chamber; a regulating chamber, and a static chamber; valve means in said housing between said supply chamber and said regulating chamber; a diaphragm separating said regulating chamber and said static chamber; a piston secured to said diaphragm and extending axially through said valve means into said supply chamber, said piston and said valve means being complementally formed to stop flow from said supply chamber to said regulating chamber in response to excessive movement of said diaphragm; a bore formed in the housing opening into said supply chamber and opposite said piston, one end of said piston being linearly movable in said bore with preselected clearance and negligible friction between said piston and said bore; said bore terminating in a bleed port in said housing, said bleed port providing communication between said bore and the surrounding, ambient atmospheric pressure, said bleed port having an area substantially larger than the flow path between the sides of said piston and said bore to bleed fluid from said bore to prevent a buildup of a head pressure on the end of said piston greater than ambient pressure; a second bleed port formed in said housing, said second port being in communication with said static chamber wherein the pressure in said static chamber is maintained at the actual surrounding atmospheric pressure; a spring mounted in said static chamber, said spring acting against said diaphragm for holding said diaphragm in a neutral position in the absence of excessive pressure in said pressure chamber wherein said valve means is open whereby flow may occur from said supply chamber to said regulating chamber; an inlet supply port in communication with said supply chamber for providing fluid thereto; and an outlet port in communication with said regulating chamber for providing fluid flow from said regulating chamber.
Claim 2
Dependent Claim
322 words
A fluid pressure regulator operating at low output pressure levels over a wide range of input supply pressure levels comprising: a housing defining a supply chamber; a regulating chamber, and a static chamber; valve means in said housing between said supply chamber and said regulating chamber; a diaphragm separating said regulating chamber and said static chamber; a piston secured to said diaphragm and extending axially through said valve means into said supply chamber, said piston and said valve means being complementally formed to stop flow from said supply chamber to said regulating chamber in response to excessive movement of said diaphragm; a bore formed in the housing opening into said supply chamber and opposite said piston, one end of said piston being linearly movable in said bore with preselected clearance and negligible friction between said piston and said bore; said bore terminating in a bleed port in said housing, said bleed port providing communication between said bore and the surrounding, ambient atmospheric pressure, said bleed port having an area substantially larger than the flow path between the sides of said piston and said bore to bleed fluid from said bore to prevent a buildup of a head pressure on the end of said piston greater than ambient pressure; a second bleed port formed in said housing, said second port being in communication with said static chamber wherein the pressure in said static chamber is maintained at the actual surrounding atmospheric pressure; a spring mounted in said static chamber, said spring acting against said diaphragm for holding said diaphragm in a neutral position in the absence of excessive pressure in said pressure chamber wherein said valve means is open whereby flow may occur from said supply chamber to said regulating chamber; an inlet supply port in communication with said supply chamber for providing fluid thereto; and an outlet port in communication with said regulating chamber for providing fluid flow from said regulating chamber.
Claim 3
Dependent Claim
28 words
The pressure regulator as set forth in claim 1 further comprising adjustment means acting on said spring to permit adjustment of the regulator to the desired operating level.
Claim 4
Dependent Claim
86 words
The pressure regulator as set forth in claim 2 in which said piston means is a double-diameter shaft, the two diameters being blended together with a tapered portion of the shaft, the smaller diameter shaft being smaller than said valve means and extending therethrough and the larger diameter portion being greater than the valve opening wherein the tapered portion of said shaft cooperates with the valve opening to regulate the amount of fluid passing through the valve in response to shaft movement due to diaphragm movement.
Claim 5
Dependent Claim
40 words
The pressure regulator as set forth in claim 3 in which said valve means comprises a rubber gasket in which the orifice is smaller than said larger portion of the shaft and larger than said smaller portion of the shaft.
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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |