US3910314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed shutoff and dump valve
Assignee: Schenck Pegasus Corp
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Filing: 1973-08-16
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Granted: 1975-10-07
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Expires: 1993-08-16
Abstract
Abstract A high-speed shutoff and dump valve operable in response to a change in input parameters thereto to shut off a flow of hydraulic fluid under pressure therethrough, having regenerative shutoff actuation and providing a fluid under pressure out, dump function on actuation. In a first modification of the valve, fluid under pressure out, is shorted to, fluid return, on actuation of the valve, while in a second modification, fluid under pressure out, and fluid return are sealed on actuation of the valve. In application, the high-speed shutoff and dump valve may be used before or after an electrohydraulic servo valve in an electrohydraulic system to control the flow of fluid through the servo valve in accordance with the presence or absence of an electrical feedback signal to the servo valve.
Inventors
- 👤 Robert D Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:45
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; F15B13/0431; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598; Y10T137/86614
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
82 words
High-speed valve structure comprising a valve body having passages therein for passage of fluid therethrough, means for metering fluid through the passages in the valve body including a valve member in one of the passages movable between an open and a closed position, and means within the valve body and operably associated with the valve member responsive to initial movement of the valve member toward a closed position for regeneratively increasing the acceleration rate of the valve member toward the closed position.
Claim 2
Dependent Claim
82 words
High-speed valve structure comprising a valve body having passages therein for passage of fluid therethrough, means for metering fluid through the passages in the valve body including a valve member in one of the passages movable between an open and a closed position, and means within the valve body and operably associated with the valve member responsive to initial movement of the valve member toward a closed position for regeneratively increasing the acceleration rate of the valve member toward the closed position.
Claim 3
Dependent Claim
58 words
Structure as set forth in claim 1 wherein the means for regeneratively increasing the acceleration rate of the valve member toward the closed position includes means within the valve body and operably associated with the valve member for increasing the pressure on one portion of the valve member tending to move the valve member toward the closed position.
Claim 4
Dependent Claim
60 words
Structure as set forth in claim 1 wherein the means for regeneratively increasing the acceleration rate of the valve member toward a closed position comprises means within the valve body and operably associated with the valve member for relieving back pressure on one portion of the valve member tending to resist movement of the valve member toward the closed position.
Claim 5
Dependent Claim
78 words
Structure as set forth in claim 3 wherein the means for relieving back pressure on one portion of the valve member comprises a chamber open to return fluid pressure surrounding the valve member and means operable between the chamber and the one portion of the valve member for metering progressively more fluid from adjacent the one portion of the valve member to the chamber in response to progressive movement of the valve member toward the closed position thereof.
Claim 6
Dependent Claim
38 words
Structure as set forth in claim 1 wherein the valve member is a spool valve and further including a valve seat for sealing one end of the spool valve which is movable with respect to the spool valve.
Claim 7
Dependent Claim
33 words
Structure as set forth in claim 5 and further including means positioned between the valve body and valve seat and operable therebetween for adjusting at least one limiting position of the valve seat.
Claim 8
Dependent Claim
39 words
Structure as set forth in claim 1 wherein the high-speed valve structure includes means operably connected to the valve member for shutting off flow of fluid under pressure thereinto on movement of the valve member to a closed position.
Claim 9
Dependent Claim
46 words
Structure as set forth in claim 7 wherein the high-speed valve structure further includes means operably connected to the valve member for dumping hydraulic fluid under pressure out to return hydraulic fluid from the valve structure on movement of the valve member to a closed position.
Claim 10
Dependent Claim
46 words
Structure as set forth in claim 7 wherein the high-speed valve structure further includes means opErably connected to the valve member for shorting hydraulic fluid under pressure out to return hydraulic fluid to the valve structure on movement of the valve member to a closed position.
Claim 11
Dependent Claim
48 words
Structure as set forth in claim 7 wherein the high-speed valve structure further includes means operably connected to the valve member for blocking hydraulic fluid under pressure out of the valve and return hydraulic fluid to the valve on movement of the valve member to a closed position.
Claim 12
Dependent Claim
251 words
High-speed valve structure comprising a valve body having passages therein for passage of fluid therethrough, means for metering fluid through the passages in the valve body including a spool valve member in one of the passages movable between an open and closed position, and means within the valve body and operably associated with the valve member responsive to initial movement of the valve member toward a closed position for regeneratively increasing the acceleration rate of the valve member toward the closed position comprising means within the valve body and operatively associated with the valve member for increasing the pressure on the one portion of the valve member tending to move the valve member toward the closed position comprising a valve seat positioned adjacent one end of the valve member and in sealing engagement therewith with the valve member in an open position, which valve seat has a recess in one side thereof opening toward the one end of the valve member and a chamber open to fluid pressure into the valve structure surrounding the one end of the valve member and receiving the one side of the valve seat whereby on initial movement of the one end of the valve member toward a closed position the fluid pressure in is provided in the recess to act against the one end of the valve member and provide pressure on the one end of the valve member related to the opening between the one end of the valve member and the valve seat.
Claim 13
Dependent Claim
251 words
High-speed valve structure comprising a valve body having passages therein for passage of fluid therethrough, means for metering fluid through the passages in the valve body including a spool valve member in one of the passages movable between an open and closed position, and means within the valve body and operably associated with the valve member responsive to initial movement of the valve member toward a closed position for regeneratively increasing the acceleration rate of the valve member toward the closed position comprising means within the valve body and operatively associated with the valve member for increasing the pressure on the one portion of the valve member tending to move the valve member toward the closed position comprising a valve seat positioned adjacent one end of the valve member and in sealing engagement therewith with the valve member in an open position, which valve seat has a recess in one side thereof opening toward the one end of the valve member and a chamber open to fluid pressure into the valve structure surrounding the one end of the valve member and receiving the one side of the valve seat whereby on initial movement of the one end of the valve member toward a closed position the fluid pressure in is provided in the recess to act against the one end of the valve member and provide pressure on the one end of the valve member related to the opening between the one end of the valve member and the valve seat.
Claim 14
Dependent Claim
60 words
Structure as set forth in claim 11 wherein the means for regeneratively increasing the acceleration rate of the valve member toward a closed position comprises means within the valve body and operably associated with the valve member for relieving back pressure on one portion of the valve member tending to resist movement of the valve member toward the closed position.
Claim 15
Dependent Claim
78 words
Structure as set forth in claim 12 wherein the means for relieving back pressure on one portion of the valve member comprises a chamber open to return fluid pressure surrounding the valve member and means operable between the chamber and the one portion of the valve member for metering progressively more fluid from adjacent the one portion of the valve member to the chamber in response to progressive movement of the valve member toward the closed position thereof.
Claim 16
Dependent Claim
38 words
Structure as set forth in claim 11 wherein the valve member is a spool valve and further including a valve seat for sealing one end of the spool valve which is movable with respect to the spool valve.
Claim 17
Dependent Claim
33 words
Structure as set forth in claim 14 and further including means positioned between the valve body and valve seat and operable therebetween for adjusting at least one limiting position of the valve seat.
Claim 18
Dependent Claim
39 words
Structure as set forth in claim 11 wherein the high-speed valve structure includes means operably connected to the valve member for shutting off flow of fluid under pressure thereinto on movement of the valve member to a closed position.
Claim 19
Dependent Claim
46 words
Structure as set forth in claim 16 wherein the high-speed valve structure further includes means operably connected to the valve member for dumping hydraulic fluid under pressure out to return hydraulic fluid from the valve structure on movement of the valve member to a closed position.
Claim 20
Dependent Claim
46 words
Structure as set forth in claim 16 wherein the high-speed valve structure further includes means operably connected to the valve member for shorting hydraulic fluid under pressure out ot return hydraulic fluid to the valve structure on movement of the valve member to a closed position.
Claim 21
Dependent Claim
49 words
Structure as set forth in claim 16 wherein the high speed valve structure further includes means operably connected to the valve member for blocking hydraulic fluid under pressure out of the valve and return hydraulic fluid to the valve on movement of the valve member to a closed position.
References Cited (Backward Citations)
US2924241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |