Patent US3929313A successfully refreshed from Google Patents.
US3929313A
Expired / Lapsed
US
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Anti-bottoming fluid control system
Assignee: GREE HYDRAULICS OF CALIFORNIA Inc
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Filing: 1974-07-31
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Granted: 1975-12-30
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Expires: 1994-07-31
Abstract
Abstract The present invention relates to an anti-bottoming control system for controlling the flow of fluid in a passage. The invention is intended to provide a means for controlling the open or closed position of a valve in a fluid flow system, and particularly a high pressure fluid flow system, the characterizing feature of the invention being the elimination of bottoming or slamming of the valve against the valve seat in the final closing stages of the valve.
Inventors
- 👤 Russell V Noah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:34
CPC Classifications
F; F16; F16K; F16K47/00; F16K31/00; F16K31/12; F16K31/122; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7876; Y10T137/8593; Y10T137/87265; Y10T137/87378; Y10T137/87394; Y10T137/87499
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
171 words
An anti-bottoming fluid control system comprising a fluid supply passage having a valve seat, a valve member movable toward and away from said seat between sealing and opening positions of said passage, actuator means for moving said valve member between said positions including a hydraulic cylinder, a piston mounted in said cylinder and dividing the same into two chambers, said piston being operatively connected to said valve, first conduit means leading to one said chamber for introducing fluid into said chamber to shift said piston toward the sealing position of said valve, bleed conduit means leading to the other said chamber for conducting fluid expelled from said other chamber to a reservoir responsive to said mOvement of said piston toward said sealing position, and pressure sensing variable orifice restrictor valve means interposed between said bleed conduit and said reservoir for sensing the pressure in said bleed conduit and varying the flow resistance in the path between said conduit and reservoir directly in accordance with the pressure sensed in said bleed conduit.
Claim 2
Dependent Claim
171 words
An anti-bottoming fluid control system comprising a fluid supply passage having a valve seat, a valve member movable toward and away from said seat between sealing and opening positions of said passage, actuator means for moving said valve member between said positions including a hydraulic cylinder, a piston mounted in said cylinder and dividing the same into two chambers, said piston being operatively connected to said valve, first conduit means leading to one said chamber for introducing fluid into said chamber to shift said piston toward the sealing position of said valve, bleed conduit means leading to the other said chamber for conducting fluid expelled from said other chamber to a reservoir responsive to said mOvement of said piston toward said sealing position, and pressure sensing variable orifice restrictor valve means interposed between said bleed conduit and said reservoir for sensing the pressure in said bleed conduit and varying the flow resistance in the path between said conduit and reservoir directly in accordance with the pressure sensed in said bleed conduit.
Claim 3
Dependent Claim
127 words
The system in accordance with claim 1 wherein said restrictor valve means includes a control chamber, a valve seat member movably mounted in and forming a wall of said control chamber, spring means biasing said seat to a first limiting position in said control chamber, a poppet normally disposed in sealing position of said seat, control circuit means for moving said poppet a predetermined distance away from said seat to define a restricted orifice between said poppet and seat, and conduit means connecting said control chamber with said bleed conduit whereby said seat is caused to move within said chamber toward said poppet against the biasing force of said spring means responsive to pressures sensed in said bleed conduit, thus to vary the size of said orifice.
Claim 4
Dependent Claim
37 words
A system in accordance with claim 2 and including adjustable stop means in the path of said poppet for limiting the movement of said poppet away from said seat, thereby to vary the size of said orifice.
Claim 5
Dependent Claim
163 words
Apparatus in accordance with claim 1 wherein said restrictor valve includes a casing, an input port in said casing connected to said bleed conduit and an exit port in said casing connected to said reservoir, a chamber in said casing connected to said input port, a valve seat member slidably mounted in and forming a wall of said chamber, spring means biasing said valve seat toward one end of said chamber, said seat member being shiftable away from said one end responsive to pressures in said chamber of a predetermined magnitude, a poppet movably mounted in said casing, poppet spring means urging said poppet into sealing position of said seat member, and control circuit means for shifting said poppet to an open position a selected distance away from said seat, said poppet and seat, in said open position, defining therebetween a restricted orifice interposed between said input and output ports, the size of said orifice varying inversely with the pressure in said chamber.
Claim 6
Dependent Claim
55 words
Apparatus in accordance with claim 4 and including adjustable stop means shiftable toward and away from said seat member, said stop means being disposed in the path of said poppet whereby the spacing of said poppet from said seat in said open position is varied in accordance with the adjusted position of said stop means.
References Cited (Backward Citations)
US2653626A
Cited
US3623509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |