US3756283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid dynamically balanced valve
Assignee: Individual
•
Filing: 1971-08-30
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Granted: 1973-09-04
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Expires: 1991-08-30
Abstract
Abstract The housing of a reduction valve includes an input chamber, an output chamber, and a main valve seat located therebetween which is engaged, when the valve is closed, by a main piston. The interior of the main piston defines a control chamber into which fluid from the input chamber can flow at a limited but substantial rate. An inner valve seat is formed in the top of the main piston which defines an opening leading from the control chamber to the output chamber. An inner piston is adapted to engage the inner valve seat, thus sealing the control chamber against the output chamber when the valve is closed. A lower chamber into which fluid can flow freely from the input chamber is located beneath the control chamber. A vane structure atop the main piston provides an upward force in response to fluid flow across the main valve seat.
Inventors
- 👤 H Angelery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:45
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86928; Y10T137/86936; Y10T137/86944; Y10T137/86984; Y10T137/87016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
A reduction valve comprising a housing including an input chamber, an output chamber, and a main valve seat disposed therebetween, a main piston adapted to engage the main valve seat when the valve is closed, a vane means for urging the main piston toward the main valve seat in response to the flow of fluid across the main valve seat into the output chamber, a control chamber disposed beneath the top of the main piston, an inner valve seat formed in the top of the main piston which defines an opening connecting the control chamber to the output chamber, an inner piston engageable with the inner valve seat, a lower chamber located beneath the inner piston into which fluid can flow freely from the input chamber, and a base that projects into the main piston, the clearance between the base and the main piston being such that fluid can flow through this clearance at a limited but substantial rate, whereby the pressure and flow of fluid is utilized to provide the forces that balance the valve.
Claim 2
Dependent Claim
176 words
A reduction valve comprising a housing including an input chamber, an output chamber, and a main valve seat disposed therebetween, a main piston adapted to engage the main valve seat when the valve is closed, a vane means for urging the main piston toward the main valve seat in response to the flow of fluid across the main valve seat into the output chamber, a control chamber disposed beneath the top of the main piston, an inner valve seat formed in the top of the main piston which defines an opening connecting the control chamber to the output chamber, an inner piston engageable with the inner valve seat, a lower chamber located beneath the inner piston into which fluid can flow freely from the input chamber, and a base that projects into the main piston, the clearance between the base and the main piston being such that fluid can flow through this clearance at a limited but substantial rate, whereby the pressure and flow of fluid is utilized to provide the forces that balance the valve.
Claim 3
Dependent Claim
23 words
The valve of claim 1 further comprising a base that projects into the main piston and defines the sides of the lower chamber.
Claim 4
Dependent Claim
21 words
The valve of claim 2 wherein the lower chamber is defined by the base and the bottom of the inner piston.
Claim 5
Dependent Claim
24 words
The valve of claim 1 wherein the vane means comprises a plurality of inclined surfaces against which the fluid acts by impact and aspiration.
Claim 6
Dependent Claim
34 words
The valve of claim 1 wherein the vane means comprises a plurality of inclined surfaces that define open cavities within which the fluid acts to urge the main piston against the main valve seat.
Claim 7
Dependent Claim
45 words
The valve of claim 1 further comprising at least one pitot tube located below the vane means through which fluid can flow to oppose the flow of fluid from the control chamber into the output chamber and to raise the pressure in the control chamber.
Claim 8
Dependent Claim
48 words
The valve of claim 1 further comprising a control means for opening and closing the valve including a stem having an inner portion which engages the inner piston and an outer portion which engages the main piston after the inner piston has been displaced through a predetermined distance.
References Cited (Backward Citations)
US2966167A
Cited
US3213887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |