US3168111A - Throttle valve - Google Patents

Throttle valve Download PDF

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US3168111A
US3168111A US16171561A US3168111A US 3168111 A US3168111 A US 3168111A US 16171561 A US16171561 A US 16171561A US 3168111 A US3168111 A US 3168111A
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valve
porous element
shut
actuator
bore
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William A Strauss
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
    • F16K47/14—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths the throttling member being a perforated membrane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86718—Dividing into parallel flow paths with recombining
    • Y10T137/86734—With metering feature

Definitions

  • This invention relates to uid throttling valves and more particularly to a valve means adapted to throttle the volumetric flow rate of liquids in a substantially linear manner with respect to the movement of a valve actuator.
  • the apparatus of the present invention provides both linear iow rate control and positive shut-off by means of improved ow control devices of the type that incorporate a porous element in moveable confronting relationship with an impervious wall surface whereby movement of an actuator progressively and linearly increases or decreases the area of the porous element exposed to the pressure dierential of the fluid.
  • valve means of the present invention comprises an actuator means that not only meters the fluid flow in a linear manner, but also functions in combination with the housing means of the valve to form a positive shut-oft for the valve.
  • an object of the present invention to provide an improved throttle valve adapted to linearly vary the volumetric iiow of a fluid from a positive shutolf position to a full ow position.
  • FIG. l is a partial side sectional view of a throttle valve constructed in accordance with the present invention, the section being taken along a vertical plane through the center line of the device;
  • FIG. 2 is a second partial side sectional view of a modified throttle valve constructed in accordance with the present invention, the section being taken along a vertical plane through the center line of the device;
  • FIG. 3 is a third partial side sectional view of a modified throttle valve constructed in accordance with the present invention, the section being taken along a vertical plane through the center line of the device.
  • FIG. l illustrates a throttle valve that includes a porous element Si) slideably mounted in a bore 90 formed in the cup-shaped portion 72 of housing means indicated generally at 6th.
  • porous element 80 is rigidly secured to the lower end 76 of an actuator means 62, the latter being slideable mounted in a bore 61 through top closure 64 and extended into a chamber 74 formed by cylindrical inner housing surface 7 S.
  • An inlet port 78 communicates with chamber 74 and the porous outer side surface 75 of element Sti.
  • Top closure 64 includes a resilient shaft seal 66 and a resilient housing seal 70.
  • porous element Si As seen in FIG. 2, the lower end of porous element Si) is covered by an impervious washer 36 which is rigidly attached to the porous element 8@ by welding, cernenting, or other suitable attaching means.
  • the outer porous side surface 75 of the porous element 80, FIG. l, is engaged by an annular resilient seal 82 in the annular wall of bore 90 and 86 includes a similar seal 88 that prevents the rapid flow of riuid between the outer fs sa surface of the porous element and the inner surfaee of bore 96.
  • a port 92 is provided for the inlet or outlet of the flowing iuid controlled by the valve.
  • the porous element Sti may include bore 84 having any dimension including zero.
  • a cupshaped housing portion 166 and top closure 104 form a housing means indicated generally at 100.
  • An actuator means 162 is attached to a cup-shaped end portion 116 at a welded junction 103 in slideable engagement with the inner surface 108 of housing portion 166, an annular resilient seal 112 being provided between the confronting surfaces.
  • a porous element 114 is secured at its lower end to the top surface of a threaded impervious washer 124 that includes an outer surface 1213 that forms a shut-ott portion.
  • an annular seal 118 at the inner surface 11i) of the cup-shaped actuator portion 116 form a shut-o valve portion that moves into seal surrounding relationship with the shut-olf valve portion 123 formed by the outer surface of a washer 124 mounted in the lower end of the housing means at a threaded junction 130.
  • one of the ports 132 in the housing means communicates with the other of the ports 12S via bore 120, the annular wall of pfzfrous element 114, and chamber of 122.
  • FIG. 3 illustrates still another modied throttle valve constructed in accordance with the present invention that includes a housing means indicated generally at and provided with a lower Casing portion 142, a top closure 144, a threaded bore 172, and ports 154 and 176.
  • a porous element 158 is provided with a bore 162 and threads 160 in threaded engagement with the threaded inner surface of bore 172.
  • porous element 158 is rigidly attached to the lower threaded end 156 of an actuator means 143, the latter being freely extended through a bore 141 in top closure 144.
  • porous element 158 is sealed by a rigidly attached impervious washer 164 that includes a bore 166 and an outer threaded surface 168 in engagement with the threaded inner surface of bore 172.
  • the positive shut-olf occurs when the lower annular end portion 180 of actuator means 14.3 and a resilient seal 152 carried thereon are moved downwardly into an annular recess 170 in the housing means wherein the annular resilient seal 152 engages the inner surface 182 of recess 170.
  • threads 168 on impervious washer 1611 and threads 160 on porous element 158 with threads in bore 172 comprise an integral actuating means.
  • the porous element 158 may include bore 162 of any dimension including zero.
  • volumetric rate or" fluid flow through any of the porous elements illustrated is directly proportional to i)
  • the surface area of the porous material exposed to the pressure differential large surface areas of high porosity material can beem ployed.
  • low porosity restriclors and long flow paths throughthe restrictor can be used.
  • Direct control -of these parameters may be made in many ways, several of which are illustrated in the accompanying drawings.
  • Each of these various embodiments provides anY actuator means housing means'andf porous element that are combined in unique structuralY arrangements so as to provide both ylinear controlof the f iuid flow and positivel shut-off at thelow 'end' of the flow control range.
  • 'A metering valve comprising, in combination, hous' ing means forming a chamber including an inner wally surface, an 'inletvport and an outletport; Yactuator means moveably mounted in said housing and vincluding an actuator wally surface; a porous element forming passage means connecting said two ports, said porous element and one of said wall surfaces being in relative slideable engagement with one another; a rst shut-off valve portion on one of said means; a second shut-ott valve portion on the other of said means, one of said valve portions being moveable through a How metering rangeV and into sealed engagement with the other of said Valve portions by movement of said actuator; and an impervious washer in sealing engagement with an end of said porous element and including a bore connecting said porous element with one of said ports, said'porous element including an outer Vside surface communicating with the other of said ports.
  • a metering valve comprising, in'combination, housing Ymeans forming a chamber Yincluding an inner walll surface, an inlet port and an outlet port; actuator means movably mounted Vin said housing and including an actuator wall surface; a ⁇ porous element forming pasi sage means connecting said two ports; an impervious Washer in sealing engagement with an end of said porous ele rent and including a bore connecting said porous element with one of said ports, said porous element including an outer side surface communicating with the other of said ports; a tirst shut-oit valve portion on said actuator means; a second shut-off valve portion on said impervious washer, one of said valve portions being moveable through a flow metering range and into sealed engagement with the other of said valve portions by movement of said actuator means; and said actuator-'means including'a portion previdedfwith an impervious innertwall in slidingv engagement with the outer wall ofvsaid porous element.
  • a meteringvalve comprising, in combination, housing means forming a chamber Yincluding -an inner wall surface, an inlet port and an outletport, actuator means moveably mounted in said housingand'including an actuator wall surface; a porous element formingl passage means connecting said two ports; an impervious washer in sealing engagement with an end of saidporous element and including a bore connecting said porous element with one of said ports, said porous elementincluding an outer ⁇ side surface communicating with the other of' said portsg: a first shut-off valve portion on said actuator means; a sec-v ond shut-oit valve portion ony said impervious washer,
  • said actuatormeans including a tip portion forming one of said Shut-off valve portions andnnoveableiinto sealed' surrounding relationship with theother of -saidshut-off valve portions formedby a portioniof said impervious washer.
  • a metering Valve comprising, in combination; housing means forming a chamber includingan' inner wall ⁇ surface, aninlet port and an outlet port; kactuator means moveably mounted in said housing and including an actuator ⁇ wall surface; a porous' element forming passage means connecting'sad two ports; an impervious washer in sealing engagement with an end of said porous element and including a bore connecting said porous element with oneof said ports; said 'porous' element 'including an-,outer side surface communicating with the other of said ports;V
  • shut-off valve ⁇ portion on said actuator means; a second shut-off valve portion on said ⁇ impervious washer, one of said valve portions being movable through a tlo'w metering'range and into sealed engagement with the other of said valve portions by movement of said actuator means; said actuator means including a tip portion provided with an impervious inner wall in sliding engagement with the outerv/all of said porous element and where- ⁇ insaid tip portion includes Van annular end forming one of said shut-off Yvalve portions and moveable into sealed surrounding'relationshipwith the other of said shut-olf valve portions formed washer.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Valve Housings (AREA)

Description

Feb. 2, 1965 w. A. sTRAuss 3,168,111
THROTTLE VALVE Filed Dec. 22, 1961 A TORNE YS 3,168,111 Patented Feb. 2, 1965 3,163,111 THROTTLE VALVE Wiliiam A. Strauss, 712 Marburn Brive, Columbus, hio Filed Dec. 22, 1961, Ser. No. 161,715 8 Claims. (Cl. 137-6255) This invention relates to uid throttling valves and more particularly to a valve means adapted to throttle the volumetric flow rate of liquids in a substantially linear manner with respect to the movement of a valve actuator.
In the metering of liquids `and gases, for example, it is frequently necessary to precisely vary the iiow rate in a linear manner through a range that extends from a positive shut-olf position to a full iiow position. In general, the apparatus of the present invention provides both linear iow rate control and positive shut-off by means of improved ow control devices of the type that incorporate a porous element in moveable confronting relationship with an impervious wall surface whereby movement of an actuator progressively and linearly increases or decreases the area of the porous element exposed to the pressure dierential of the fluid.
More specifically, the valve means of the present invention comprises an actuator means that not only meters the fluid flow in a linear manner, but also functions in combination with the housing means of the valve to form a positive shut-oft for the valve.
It is, therefore, an object of the present invention to provide an improved throttle valve adapted to linearly vary the volumetric iiow of a fluid from a positive shutolf position to a full ow position.
Other objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein preferred forms of embodiments of the invention are clearly shown.
In the drawings:
FIG. l is a partial side sectional view of a throttle valve constructed in accordance with the present invention, the section being taken along a vertical plane through the center line of the device;
FIG. 2 is a second partial side sectional view of a modified throttle valve constructed in accordance with the present invention, the section being taken along a vertical plane through the center line of the device; and
FIG. 3 is a third partial side sectional view of a modified throttle valve constructed in accordance with the present invention, the section being taken along a vertical plane through the center line of the device.
Referring in detail to the drawing, FIG. l illustrates a throttle valve that includes a porous element Si) slideably mounted in a bore 90 formed in the cup-shaped portion 72 of housing means indicated generally at 6th.
With continued reference to FIG. 2, the top end of porous element 80 is rigidly secured to the lower end 76 of an actuator means 62, the latter being slideable mounted in a bore 61 through top closure 64 and extended into a chamber 74 formed by cylindrical inner housing surface 7 S.
An inlet port 78 communicates with chamber 74 and the porous outer side surface 75 of element Sti.
Top closure 64 includes a resilient shaft seal 66 and a resilient housing seal 70.
As seen in FIG. 2, the lower end of porous element Si) is covered by an impervious washer 36 which is rigidly attached to the porous element 8@ by welding, cernenting, or other suitable attaching means.
The outer porous side surface 75 of the porous element 80, FIG. l, is engaged by an annular resilient seal 82 in the annular wall of bore 90 and 86 includes a similar seal 88 that prevents the rapid flow of riuid between the outer fs sa surface of the porous element and the inner surfaee of bore 96.
A port 92 is provided for the inlet or outlet of the flowing iuid controlled by the valve.
The porous element Sti may include bore 84 having any dimension including zero.
Referring next to the modification of FIG. 2, a cupshaped housing portion 166 and top closure 104 form a housing means indicated generally at 100. An actuator means 162 is attached to a cup-shaped end portion 116 at a welded junction 103 in slideable engagement with the inner surface 108 of housing portion 166, an annular resilient seal 112 being provided between the confronting surfaces.
In the embodiment of FIG. 2 a porous element 114 is secured at its lower end to the top surface of a threaded impervious washer 124 that includes an outer surface 1213 that forms a shut-ott portion. When actuator 102 is moved downwardly, an annular seal 118 at the inner surface 11i) of the cup-shaped actuator portion 116 form a shut-o valve portion that moves into seal surrounding relationship with the shut-olf valve portion 123 formed by the outer surface of a washer 124 mounted in the lower end of the housing means at a threaded junction 130.
With continued reference to FIG. 2, one of the ports 132 in the housing means communicates with the other of the ports 12S via bore 120, the annular wall of pfzfrous element 114, and chamber of 122.
Reference is next made to FIG. 3 which illustrates still another modied throttle valve constructed in accordance with the present invention that includes a housing means indicated generally at and provided with a lower Casing portion 142, a top closure 144, a threaded bore 172, and ports 154 and 176.
In the embodiment of FIG. 3 a porous element 158 is provided with a bore 162 and threads 160 in threaded engagement with the threaded inner surface of bore 172.
In the embodiment of FIG. 3 the upper end of porous element 158 is rigidly attached to the lower threaded end 156 of an actuator means 143, the latter being freely extended through a bore 141 in top closure 144.
The lower end of porous element 158 is sealed by a rigidly attached impervious washer 164 that includes a bore 166 and an outer threaded surface 168 in engagement with the threaded inner surface of bore 172.
In the embodiment of FIG. 3 the positive shut-olf occurs when the lower annular end portion 180 of actuator means 14.3 and a resilient seal 152 carried thereon are moved downwardly into an annular recess 170 in the housing means wherein the annular resilient seal 152 engages the inner surface 182 of recess 170.
The fluid ow between the ports 154 and 176, FIG. 3, occurs via bores 174 and 172, a hole 166 through impervious washer 164, and the annular wall of porous element 158.
The engagement of threads 168 on impervious washer 1611 and threads 160 on porous element 158 with threads in bore 172 comprise an integral actuating means.
The porous element 158, FIG. 3, may include bore 162 of any dimension including zero.
In the various figures, elements 36, 50, 126, 143, 148, and obviously constitute O-ring seals not specifically mentioned in describing the figures. It will be understood that these seals and the others specifically mentioned can be modified in type and form without departing from the spirit of the invention.
In operation it should be pointed out that the volumetric rate or" fluid flow through any of the porous elements illustrated is directly proportional to i) The surface area of the porous material exposed to the pressure differential large surface areas of high porosity material can beem ployed. For smaller volume ows, low porosity restriclors and long flow paths throughthe restrictor can be used. Direct control -of these parameters may be made in many ways, several of which are illustrated in the accompanying drawings. Each of these various embodiments provides anY actuator means housing means'andf porous element that are combined in unique structuralY arrangements so as to provide both ylinear controlof the f iuid flow and positivel shut-off at thelow 'end' of the flow control range.
While the forms of embodiments of the present invention as herein disclosedV constitute preferredf'forms, it is to be lunderstood that other forms might be adopted, all coming within the scope ofthe claims which follow.
I claim:
1. 'A metering valve comprising, in combination, hous' ing means forming a chamber including an inner wally surface, an 'inletvport and an outletport; Yactuator means moveably mounted in said housing and vincluding an actuator wally surface; a porous element forming passage means connecting said two ports, said porous element and one of said wall surfaces being in relative slideable engagement with one another; a rst shut-off valve portion on one of said means; a second shut-ott valve portion on the other of said means, one of said valve portions being moveable through a How metering rangeV and into sealed engagement with the other of said Valve portions by movement of said actuator; and an impervious washer in sealing engagement with an end of said porous element and including a bore connecting said porous element with one of said ports, said'porous element including an outer Vside surface communicating with the other of said ports.
2. The apparatus defined in claim l wherein said actuator means includes a tip forming one of said shut-off valve portions and said housing means includes a bore' forming the other of said shut-o valve portions.
3. The apparatus defined in claim 1 wherein said porousV element is attached to said actuator means for longitudinal movement therewith, said outer, side surface of said porous clement slideably engaging the inner surface of a bore in said housing means.
4. The apparatus deiined in claim 1 wherein saidporo'us element is attached to an end of said Vactuator means and provided with a threaded outer wall in threaded engagement with a threaded bore in said housing means.
5. The apparatus defined in claim 1 wherein said porous element is attached to an end of said actuator meansv andV provided with a threaded outer wall in threaded engagement with a threaded bore in said housing means and wherein one-of said' shut-off valve portions is'formed by said end of said actuator means and theiother of said shut-off valve portions is formed by a bore in said housing means.
6. A metering valve comprising, in'combination, housing Ymeans forming a chamber Yincluding an inner walll surface, an inlet port and an outlet port; actuator means movably mounted Vin said housing and including an actuator wall surface; a `porous element forming pasi sage means connecting said two ports; an impervious Washer in sealing engagement with an end of said porous ele rent and including a bore connecting said porous element with one of said ports, said porous element including an outer side surface communicating with the other of said ports; a tirst shut-oit valve portion on said actuator means; a second shut-off valve portion on said impervious washer, one of said valve portions being moveable through a flow metering range and into sealed engagement with the other of said valve portions by movement of said actuator means; and said actuator-'means including'a portion previdedfwith an impervious innertwall in slidingv engagement with the outer wall ofvsaid porous element.
7. A meteringvalve comprising, in combination, housing means forming a chamber Yincluding -an inner wall surface, an inlet port and an outletport, actuator means moveably mounted in said housingand'including an actuator wall surface; a porous element formingl passage means connecting said two ports; an impervious washer in sealing engagement with an end of saidporous element and including a bore connecting said porous element with one of said ports, said porous elementincluding an outer` side surface communicating with the other of' said portsg: a first shut-off valve portion on said actuator means; a sec-v ond shut-oit valve portion ony said impervious washer,
one of said'valve portions being moveable throughv a flow metering range and into sealedA engagement with the other of said valve portions by movement of said actuator means; said actuatormeans including a tip portion forming one of said Shut-off valve portions andnnoveableiinto sealed' surrounding relationship with theother of -saidshut-off valve portions formedby a portioniof said impervious washer.'
8. A metering Valve comprising, in combination; housing means forming a chamber includingan' inner wall` surface, aninlet port and an outlet port; kactuator means moveably mounted in said housing and including an actuator` wall surface; a porous' element forming passage means connecting'sad two ports; an impervious washer in sealing engagement with an end of said porous element and including a bore connecting said porous element with oneof said ports; said 'porous' element 'including an-,outer side surface communicating with the other of said ports;V
a l'irst shut-off valve `portion on said actuator means; a second shut-off valve portion on said` impervious washer, one of said valve portions being movable through a tlo'w metering'range and into sealed engagement with the other of said valve portions by movement of said actuator means; said actuator means including a tip portion provided with an impervious inner wall in sliding engagement with the outerv/all of said porous element and where-` insaid tip portion includes Van annular end forming one of said shut-off Yvalve portions and moveable into sealed surrounding'relationshipwith the other of said shut-olf valve portions formed washer.
References Cited in the yiileof this patent UNITED STATES PATENTS 893,884 Sturgis Ju1y 21, i908 1,307,986 Randall June 24, 1919 2,517,061 Stackelberg ,Aug l, 1950 2,819,799 \VilkerSon Ian. 14, 1958 2,887,129 Stear May 19, 1959 FOVREIGN PATENTS 24,155 Great Britain Dec. 3l, 1892 1,152,740' France l Sept. 9, 1957 by a portion Vof said impervious

Claims (1)

1. A METERING VALVE COMPRISING, IN COMBINATION, HOUSING MEANS FORMING A CHAMBER INCLUDING AN INNER WALL SURFACE, AN INLET PORT AND AN OUTLET PORT; ACTUATOR MEANS MOVEABLY MOUNTED IN SAID HOUSING AND INCLUDING AN ACTUATOR WALL SURFACE; A POROUS ELEMENT FORMING PASSAGE MEANS CONNECTING SAID TWO PORTS, SAID POROUS ELEMENT AND ONE OF SAID WALL SURFACES BEING IN RELATIVE SLIDEABLE ENGAGEMENT WITH ONE ANOTHER; A FIRST SHUT-OFF VALVE PORTION ON ONE OF SAID MEANS; A SECOND SHUT-OFF VALVE PORTION ON THE OTHER OF SAID MEANS, ONE OF SAID VALVE PORTIONS BEING MOVEABLE THROUGH A FLOW METERING RANGE AND INTO SEALED EN-
US16171561 1961-12-22 1961-12-22 Throttle valve Expired - Lifetime US3168111A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338548A (en) * 1964-12-03 1967-08-29 Mott Metallurg Corp Flow control valves
US3527254A (en) * 1968-07-10 1970-09-08 Mott Metallurg Corp Flow control valve
US4083380A (en) * 1976-05-27 1978-04-11 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Fluid valve assembly
WO1985005657A1 (en) * 1984-06-01 1985-12-19 The Johns Hopkins University Single valve diaphragm pump with decreased sensitivity to ambient conditions
US4888952A (en) * 1987-05-21 1989-12-26 Robert Bosch Gmbh Re-aspiration valve for master brake cylinders
WO2006029961A1 (en) * 2004-09-15 2006-03-23 Maquet Critical Care Ab Ventilator arrangement
US20090145609A1 (en) * 2007-12-06 2009-06-11 Holmes Kevin C Valve Responsive to Fluid Properties
WO2014183928A1 (en) * 2013-05-14 2014-11-20 Witt Gmbh & Co. Holding Und Handels-Kg Valve device and valve block
US20210222796A1 (en) * 2016-09-26 2021-07-22 Equinor Energy As Method and Apparatus for Reducing Liquid Pressure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US893884A (en) * 1907-05-27 1908-07-21 Edwin M Sturgis Valve.
US1307986A (en) * 1919-06-24 Valve
US2517061A (en) * 1945-03-09 1950-08-01 Glenn L Martin Co Valve
US2819799A (en) * 1955-03-30 1958-01-14 Wilkerson Corp Low pressure drain valve
FR1152740A (en) * 1956-05-07 1958-02-24 Liquid Controls Corp Sliding shutter valve
US2887129A (en) * 1956-01-10 1959-05-19 Hughes Aircraft Co Liquid metering device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1307986A (en) * 1919-06-24 Valve
US893884A (en) * 1907-05-27 1908-07-21 Edwin M Sturgis Valve.
US2517061A (en) * 1945-03-09 1950-08-01 Glenn L Martin Co Valve
US2819799A (en) * 1955-03-30 1958-01-14 Wilkerson Corp Low pressure drain valve
US2887129A (en) * 1956-01-10 1959-05-19 Hughes Aircraft Co Liquid metering device
FR1152740A (en) * 1956-05-07 1958-02-24 Liquid Controls Corp Sliding shutter valve

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338548A (en) * 1964-12-03 1967-08-29 Mott Metallurg Corp Flow control valves
US3527254A (en) * 1968-07-10 1970-09-08 Mott Metallurg Corp Flow control valve
US4083380A (en) * 1976-05-27 1978-04-11 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Fluid valve assembly
WO1985005657A1 (en) * 1984-06-01 1985-12-19 The Johns Hopkins University Single valve diaphragm pump with decreased sensitivity to ambient conditions
US4594058A (en) * 1984-06-01 1986-06-10 The Johns Hopkins University Single valve diaphragm pump with decreased sensitivity to ambient conditions
US4888952A (en) * 1987-05-21 1989-12-26 Robert Bosch Gmbh Re-aspiration valve for master brake cylinders
WO2006029961A1 (en) * 2004-09-15 2006-03-23 Maquet Critical Care Ab Ventilator arrangement
US20080053432A1 (en) * 2004-09-15 2008-03-06 Ake Larsson Valve Arrangement
US20090145609A1 (en) * 2007-12-06 2009-06-11 Holmes Kevin C Valve Responsive to Fluid Properties
WO2009076038A2 (en) * 2007-12-06 2009-06-18 Baker Hughes Incorporated Valve responsive to fluid properties
WO2009076038A3 (en) * 2007-12-06 2009-09-03 Baker Hughes Incorporated Valve responsive to fluid properties
US7980265B2 (en) 2007-12-06 2011-07-19 Baker Hughes Incorporated Valve responsive to fluid properties
WO2014183928A1 (en) * 2013-05-14 2014-11-20 Witt Gmbh & Co. Holding Und Handels-Kg Valve device and valve block
US20210222796A1 (en) * 2016-09-26 2021-07-22 Equinor Energy As Method and Apparatus for Reducing Liquid Pressure
US11655914B2 (en) * 2016-09-26 2023-05-23 Equinor Energy As Method and apparatus for reducing liquid pressure

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