Patent US3733050A successfully refreshed from Google Patents.
US3733050A
Expired / Lapsed
US
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High pressure valve
Assignee: Leland Stanford Junior University
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Filing: 1971-02-16
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Granted: 1973-05-15
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Expires: 1991-02-16
Abstract
Abstract A high pressure valve in which the valve needle is guided in a well formed in the valve body so that it can be moved to seat one end in a valve seat formed at the bottom of said well. Outlet and inlet passages communicate with the opposite sides of the seat whereby the flow of fluid between said passages can be controlled by axial movement of the valve needle. The valve needle is arranged and formed whereby the pressure of the fluid being controlled applies a retracting force to retract the valve needle. The valve needle drive means cooperates with said valve needle to overcome the retracting force and advance the needle into seating engagement in the valve seat.
Inventors
- 👤 P Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:42
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/44; F16K31/50; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
A valve comprising a valve body, a well formed in said body with a valve seat formed at the bottom of said well, inlet and outlet pressure passages communicating with said well from opposite sides of said valve seat, a valve needle accommodated in said well and movable between an advanced seated position and a retracted position, said valve needle having one end of reduced diameter to form a shoulder along the needle and provide a space between the needle and well at said one end whereby the pressure passages can be placed in communication with one another, packing means carried by said end of said needle in abutting relationship with said shoulder whereby fluids under pressure in said space provide a continuous axial force on said packing and needle to retract the valve needle, and unyielding drive means adapted to abut the other end of said needle to overcome the axial retracting forces to advance the needle towards its seated position.
Claim 2
Dependent Claim
162 words
A valve comprising a valve body, a well formed in said body with a valve seat formed at the bottom of said well, inlet and outlet pressure passages communicating with said well from opposite sides of said valve seat, a valve needle accommodated in said well and movable between an advanced seated position and a retracted position, said valve needle having one end of reduced diameter to form a shoulder along the needle and provide a space between the needle and well at said one end whereby the pressure passages can be placed in communication with one another, packing means carried by said end of said needle in abutting relationship with said shoulder whereby fluids under pressure in said space provide a continuous axial force on said packing and needle to retract the valve needle, and unyielding drive means adapted to abut the other end of said needle to overcome the axial retracting forces to advance the needle towards its seated position.
Claim 3
Dependent Claim
22 words
A valve as in claim 1 wherein said shoulder is inclined to urge the packing outwardly against the walls of the well.
Claim 4
Dependent Claim
16 words
A valve as in claim 1 wherein said packing is retained by means of an O-ring.
Claim 5
Dependent Claim
27 words
A valve as in claim 1 wherein said drive means includes a thrust block carried in said body for transmitting forces between the needle and associated drive.
Claim 6
Dependent Claim
20 words
A valve as in claim 4 including means limiting movement of said thrust block under retracting forces from said needle.
References Cited (Backward Citations)
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Cited
US2365752A
Cited
US3326231A
Cited
US3215163A
Cited
US3430652A
Cited
US3527250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |