US3911947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manually-adjustable pressure regulator
Assignee: Martonair Ltd
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Filing: 1974-01-25
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Granted: 1975-10-14
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Expires: 1994-01-25
Abstract
Abstract A manually-adjustable pressure regulator having a pair of resiliently interconnected pistons of which one acts directly on a valve member which controls flow of a pressurised fluid and the other piston is movable by an operating spindle to open or close the valve member. A chamber is defined between the other piston and the adjacent end of the housing into which fluid is applied when the valve is open. The pressure of fluid applied to the chamber is such that the force applied to the other piston substantially balances the reaction of the valve on the other piston whereby the effort required to move the operating spindle is independent of the reaction of the valve.
Inventors
- 👤 Eric John Boxall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; F16K17/00; F16K17/20; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7797; Y10T137/7822; Y10T137/7823; Y10T137/7826
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
282 words
An adjustable fluid pressure regulator including a housing having fluid inlet and outlet ports, a valve seat positioned in the housing between said inlet and outlet ports, a valve member engageable with said valve seat and movable toward and away from valve seat to respectively close and open said valve seat, first resilient biasing means arranged between said valve member and said housing and acting on said valve member to urge it towards said valve seat, a first chamber defined in said housing, a first piston sealingly located in said first chamber, said valve member directly engaging said first piston under the action of said first resilient biasing means, an adjustable operating member in screw-threaded engagement with said housing, a second chamber defined in said housing and spaced from said first chamber, a second piston rotatably attached to said operating member and sealingly located in said second chamber, second resilient biasing means arranged between said first and said second pistons and acting on said first piston to urge said valve member away from said valve seat, fluid conduit means interconnecting said outlet port and said first chamber to apply the outlet fluid pressure to said first piston to oppose the action of said second resilient biasing means, and a conduit connecting said outlet port to said second chamber, whereby fluid pressure at said outlet port will act on said second piston to substantially balance the force on said operating member due to the action of said second resilient biasing means when the valve member has been moved away from said valve seat, the fluid pressure at said outlet port being predetermined by the position to which said operating member has been adjusted.
Claim 2
Dependent Claim
282 words
An adjustable fluid pressure regulator including a housing having fluid inlet and outlet ports, a valve seat positioned in the housing between said inlet and outlet ports, a valve member engageable with said valve seat and movable toward and away from valve seat to respectively close and open said valve seat, first resilient biasing means arranged between said valve member and said housing and acting on said valve member to urge it towards said valve seat, a first chamber defined in said housing, a first piston sealingly located in said first chamber, said valve member directly engaging said first piston under the action of said first resilient biasing means, an adjustable operating member in screw-threaded engagement with said housing, a second chamber defined in said housing and spaced from said first chamber, a second piston rotatably attached to said operating member and sealingly located in said second chamber, second resilient biasing means arranged between said first and said second pistons and acting on said first piston to urge said valve member away from said valve seat, fluid conduit means interconnecting said outlet port and said first chamber to apply the outlet fluid pressure to said first piston to oppose the action of said second resilient biasing means, and a conduit connecting said outlet port to said second chamber, whereby fluid pressure at said outlet port will act on said second piston to substantially balance the force on said operating member due to the action of said second resilient biasing means when the valve member has been moved away from said valve seat, the fluid pressure at said outlet port being predetermined by the position to which said operating member has been adjusted.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |