US3601148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid-pressure-regulating valve device
Assignee: Westinghouse Air Brake Co
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Filing: 1969-10-07
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Granted: 1971-08-24
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Expires: 1989-10-07
Abstract
Abstract A fluid-pressure-regulating valve device including adjusting means for setting the device to deliver fluid at a selected pressure, piston-operated valve means for controlling and maintaining delivery of fluid at the preselected pressure level, the piston for operating said valve means being normally biased in one direction by an adjustable force for opening said valve means and being subject to supply fluid pressure acting thereon in opposition to said adjustable force for closing said valve means when the delivered pressure attains said preselected pressure sufficient for overriding said adjustable force venturi means in the supply communication for causing the pressure of supply fluid acting on the piston to be reduced to a lesser degree than the delivered pressure for thereby affecting the piston to maintain the valve means in its fully open position until the preselected pressure is attained, and means for effecting balance of pressure on both sides of the valve means for rendering the piston more sensitive to any change in the degree of delivered pressure when the valve means is closed.
Inventors
- 👤 William B Jeffrey
- 👤 William H Reno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:33
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/18; G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0644; G05D16/0655; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7754; Y10T137/7756; Y10T137/7757; Y10T137/7781; Y10T137/7793; Y10T137/7809; Y10T137/782
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
302 words
A fluid-pressure-regulating valve device comprising: a. a fluid pressure inlet, b. a fluid pressure outlet, c. first passage means through which fluid under pressure may flow from said inlet to said outlet, d. valve means interposed in said first passage means, e. valve-operating means operably connected to said valve means, said valve-operating means being subject to a force acting on one side thereof and movable responsively thereto in one direction for operating said valve means to an open position in which communication through said first passage means is open, f. venturi means disposed in said first passage means communicating fluid pressure in said first passage means to a pressure chamber adjacent the opposite side of said valveoperating means via a passageway having one end opening to said venturi means and other end opening to said chamber, g. said valve-operating means being movable in a direction opposite to said one direction in response to buildup of fluid pressure in said pressure chamber to a predetermined value sufficient for overriding said force to effect operation of said valve means to a closed position in which communication through said first passage means is closed, h. said venturi means being effective for maintaining the pressure of fluid in said pressure chamber acting on said opposite side of said valve-operating means at a lesser degree than that delivered to the outlet for sustaining said valve means in a fully opened position until such pressure at the outlet attains said predetermined value, and i. second passage means communicating said fluid pressure chamber with the side of said valve means opposite that adjacent the first passage means for effecting a balanced state of fluid pressure on both sides of the valve means, when in its Closed position, at a level corresponding to that of delivered pressure at the outlet.
Claim 2
Dependent Claim
302 words
A fluid-pressure-regulating valve device comprising: a. a fluid pressure inlet, b. a fluid pressure outlet, c. first passage means through which fluid under pressure may flow from said inlet to said outlet, d. valve means interposed in said first passage means, e. valve-operating means operably connected to said valve means, said valve-operating means being subject to a force acting on one side thereof and movable responsively thereto in one direction for operating said valve means to an open position in which communication through said first passage means is open, f. venturi means disposed in said first passage means communicating fluid pressure in said first passage means to a pressure chamber adjacent the opposite side of said valveoperating means via a passageway having one end opening to said venturi means and other end opening to said chamber, g. said valve-operating means being movable in a direction opposite to said one direction in response to buildup of fluid pressure in said pressure chamber to a predetermined value sufficient for overriding said force to effect operation of said valve means to a closed position in which communication through said first passage means is closed, h. said venturi means being effective for maintaining the pressure of fluid in said pressure chamber acting on said opposite side of said valve-operating means at a lesser degree than that delivered to the outlet for sustaining said valve means in a fully opened position until such pressure at the outlet attains said predetermined value, and i. second passage means communicating said fluid pressure chamber with the side of said valve means opposite that adjacent the first passage means for effecting a balanced state of fluid pressure on both sides of the valve means, when in its Closed position, at a level corresponding to that of delivered pressure at the outlet.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |