US2634743A - Control valve mechanism - Google Patents

Control valve mechanism Download PDF

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US2634743A
US2634743A US770525A US77052547A US2634743A US 2634743 A US2634743 A US 2634743A US 770525 A US770525 A US 770525A US 77052547 A US77052547 A US 77052547A US 2634743 A US2634743 A US 2634743A
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piston
valve
control valve
inlet
chamber
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Audemar Pierre
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B7/00Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/003Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors with multiple outputs
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/0753Control by change of position or inertia of system
    • Y10T137/0923By pendulum or swinging member
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/2496Self-proportioning or correlating systems
    • Y10T137/2559Self-controlled branched flow systems
    • Y10T137/2564Plural inflows
    • Y10T137/2567Alternate or successive inflows
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7837Direct response valves [i.e., check valve type]
    • Y10T137/7838Plural
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86919Sequentially closing and opening alternately seating flow controllers
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86928Sequentially progressive opening or closing of plural valves
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/87571Multiple inlet with single outlet
    • Y10T137/87676With flow control
    • Y10T137/87684Valve in each inlet

Definitions

  • CONTROL VALVE MECHANISM Filed Aug. 25, 1947 Patented pr. 14, l 1953 CONTROL VALVE MECHANISM Pierre Audemar, La Garenne-Colombes, France Application August 25, 1947 Serial No. 7 70,525 In France February Z7, 11946 Section 1, Public Law 690, August 8, 1946 Patent expires February 327, 1966 4 Claims.
  • This invention relates to control valve mechanism for use in connection with hydraulic transmission systems comprising two transmitters constituted each for example by a piston displaceable in a cylinder, both cylinders being interconnected by a pipe line into which is branched, at right angles thereto, a conduit adapted to operate the receiver such Vfor exam?- pleas the piston of a hydraulic jack.
  • the problem is -how to act upon one of said transmitters without sending the fluid medium into the other, while introducing the same into the receiver.
  • the present invention has for its object to provide in a simple and ecient structure a novel control valve mechanism which shall obviate said 'inconvenience and permit the receiver to be operated -by one or the other of the'two trans.- mitters, without allowing the hydraulic iiuid to penetrate into the unactuated transmitter, whatever may be the velocity with which the piston of the actuated transmitter vis displaced.
  • Fig. 1 is a diagrammatic view showing a hydraulic transmission system comprising two transmitters,.a receiver and a control valve mechanism ,according to the present invention
  • Fig. 2 isa diagrammatic view showing a hydraulic transmission system comprising four transmitter, a receiver and Athree control valve mechanism 4according vto the invention;
  • Fig. 3 is a longitudinal sectional view showing the structure of the control valve ,mech-anism according to the invention.
  • Fig. V4 shows a portion of the Vdevice of Fig. v3 wherein the parts occupy lanother position.
  • Fig. 1 designated by VI and 2 are two transmitter unit, 3 is a receiver unit, 6 is a control valve mechanism designed according to the present invention, 4 is a conduit leading from the control valve mechanism 6 into the receiver unit 3 while .5a ,and A5b are pipes connecting the transmitter ⁇ units I and 2, respectively, with the ⁇ control valve mechanism kB.
  • 'lf-he piston of the receiver unit 3 is Vconstantly acted upon by a spring so that the vpiston may .be restored to its initial position whenever the transmitters become inoperative.
  • Fig. 2 a hydraulic transmission system comprising four transmitter units.
  • the receiver may be constituted for example by a diierential hydraulic jack of which the face opposed to that acted upon by the liquid pressure exerted by one of the transmitters is constantly under a hydraulic pressure exerted through a Aconduit C.
  • Figs. 3 and 4 are enlarged showings of the control valve mechanism 6.
  • 'Ia is the valve seat corresponding to the pipe ⁇ 5a
  • Ib is a valve-seat corresponding to the pipe 5b.
  • a two-face valve 8 carrying two coaxial rods 9a and Sfb, respectively.
  • Illa and lIlb are two pistons arranged on both sides of the conduit 4.
  • a chamber in which is positioned a ball I2 adapted to close .
  • I5 Designated by I5 is an abutment adapted to limit the displacements of l.the iball I2 within the chamber, while by I6 are designated openings permitting the chamber :to communicate l.with the pipes 5a and 5b, respectively.
  • I6 are designated openings permitting the chamber :to communicate l.with the pipes 5a and 5b, respectively.
  • ⁇ The .two Apistons laila .and I'Ub are furged, r ⁇ the formen-toward 'the left and the latter .toward the ,right as viewed vin Fig. 3, by springs nl.
  • the .devicer of the invention lends itself to many applications.
  • it may be used for controlling brakes, for example brakes of a railway train. It may further be applied to allsorts of transmissions to a distance.
  • This device is particularly intended to be applied to double transmissions, more particularly to double transmissions for use in connection with iiying machines to which it assures full working safety.
  • a control valve mechanism for use in connection with hydraulic transmission systems including at least two transmitters and one re- A DC, comprising a casing having two inlet chambers and an outlet chamber located between said inlet chambers and communicating with the same through ports, a two-face valve member located between said ports for controlling communication between each of said inlet chambers and said outlet chamber, a stem extending from each'face of said valve member, a pressure responsive valve operating element in each inlet chamber having an opening in alignment with said stems for establishing a communication between the inlet ports and the outlet chamber, and valve means for controlling said openings adapted to act on said stems so as to engage said two-face valve member to interrupt communication between one of said inlet chambers and said outlet chamber on initial movement of the Valve operating element in the other inlet chamber, and to permit communication between the inlet port of Said other inlet chamber and said outlet chamber on subsequent movement of said element.
  • a control valve mechanism for'use in connection with hydraulic transmission systems including at least two transmitters and a single receiver, comprising two parallel cylindrical inlet chambers provided with inlet ports, an outlet chamber between said inlet chambers and communicating therewith through ports, a twoface valve member in said outlet chamber located between said ports for controlling communication between said inlet chambers and said outlet chamber, a stem extending from each face of said Valve member into one of said inlet chambers, a hollow piston in'each of said inlet cham- 'niA bers responsive to the liquid pressure introduced into said inlet chambers through one or the other of said inlet ports, each piston having an axial opening in alignment with said stems for establishing communication between the spaces at the front and rear of the piston, and check Valves for controlling said openings adapted to act on.
  • said stems so as to engage said two-face valve member to interrupt communication between one of said inlet chambers and said outlet chamber on initial movement of the piston in the other inlet chamber, the arrangement being such that the check valve in said other inlet chamber is opened by the corresponding stem to permit communication between the inlet port of said other inlet chamber and the outlet chamber on subsequent movement of the piston in said other inlet chamber.
  • a control valve mechanism for use in connection with hydraulic transmission systems including at least two transmitters and one receiver connected by pipe lines, comprising a casing, two spaced valve seats arranged within said casing and corresponding each to the respective inlet pipe supplying the liquid under pressure, a two-faced valve member located between said valve seats and adapted to apply against either of them, two opposed rods protruding each from the corresponding valve face, two hollow pistons arranged each within the corresponding end portion of said casing between said rods and said inlet pipes, resilient means interposed between each valve seat and the corresponding piston for limiting the displacement of the latter, a. valve arranged in a hole in each piston and adapted. when the piston is acted upon by the incoming liquid, to cause the two-faced valve member through its respective rod to apply against one of its seats, and intermediate piping leading from the space between said valve seats into said receiver.
  • a control valve mechanism for use in connection with hydraulic transmission systems including at least two transmitters and one receiver connected by pipe lines, comprising a casing, two spaced valve seats arranged within said casing and corresponding each to the respective inlet pipe supplying the liquid under pressure, a two-faced valve member located between said valve seats land adapted to apply against either of them, two opposed rods protruding each from the corresponding valve face, two pistons arranged each within the corresponding end portion of said casing between said rods and said inlet pipes, a counterspring interposed between each valve seat and the corresponding piston for limiting the displacement of each piston, a chamber arranged within each piston, adapted to be lled up with the incoming pressure liquid and provided on its front face with an opening co-aXial with one of said valve rods, a ball disposed in front of said opening and displaceable within said chamber, a second counterspring and an abutment interposed between the bottom of said chamber and said ball for limiting the displacement of the same, and an outlet pipe leading from the space between

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear-Shifting Mechanisms (AREA)

Description

April 14 1953 P. AUDEMAR 2,634,743
CONTROL VALVE MECHANISM Filed Aug. 25, 1947 Patented pr. 14, l 1953 CONTROL VALVE MECHANISM Pierre Audemar, La Garenne-Colombes, France Application August 25, 1947 Serial No. 7 70,525 In France February Z7, 11946 Section 1, Public Law 690, August 8, 1946 Patent expires February 327, 1966 4 Claims.
This invention relates to control valve mechanism for use in connection with hydraulic transmission systems comprising two transmitters constituted each for example by a piston displaceable in a cylinder, both cylinders being interconnected by a pipe line into which is branched, at right angles thereto, a conduit adapted to operate the receiver such Vfor exam?- pleas the piston of a hydraulic jack.
. The problem is -how to act upon one of said transmitters without sending the fluid medium into the other, while introducing the same into the receiver.
. With a View to solving this problem Ait has been proposed to mount in the pipe line interconnecting the two transmitters, and von both sides of the `conduit leading into the receiver, two valve seats between which may move freely a double-acting valve adapted, when pushed by the iiuid medium coming through the pipe line from one transmitter that has just been actuated, to cut off the communication with the other.
.Such an arrangement, however, while behaving pretty well when sudden transmissions are necessary determining `a quick displacement of the hydraulic fluid, is ineicient when slow displacements are dealt with, because the doubleacting valve remains in its median position and allows the hydraulic uid to flow into vthe un' actuated transmitter, a fact lwhich presents a serious inconvenience.
The present invention has for its object to provide in a simple and ecient structure a novel control valve mechanism which shall obviate said 'inconvenience and permit the receiver to be operated -by one or the other of the'two trans.- mitters, without allowing the hydraulic iiuid to penetrate into the unactuated transmitter, whatever may be the velocity with which the piston of the actuated transmitter vis displaced.
`With this and other objects in view, the invention resides in the novel features Aof construction and arrangements of parts, as more fully hereinafter set forth.
In the accompanying drawing, Ain which vlike reference characters indicate like parts,
Fig. 1 is a diagrammatic view showing a hydraulic transmission system comprising two transmitters,.a receiver and a control valve mechanism ,according to the present invention;
Fig. 2 isa diagrammatic view showing a hydraulic transmission system comprising four transmitter, a receiver and Athree control valve mechanism 4according vto the invention;
Fig. 3 is a longitudinal sectional view showing the structure of the control valve ,mech-anism according to the invention; and
Fig. V4 shows a portion of the Vdevice of Fig. v3 wherein the parts occupy lanother position. i
Referring first to Fig. 1, designated by VI and 2 are two transmitter unit, 3 is a receiver unit, 6 is a control valve mechanism designed according to the present invention, 4 is a conduit leading from the control valve mechanism 6 into the receiver unit 3 while .5a ,and A5b are pipes connecting the transmitter `units I and 2, respectively, with the `control valve mechanism kB. 'lf-he piston of the receiver unit 3 is Vconstantly acted upon by a spring so that the vpiston may .be restored to its initial position whenever the transmitters become inoperative.
In Fig. 2 is shown a hydraulic transmission system comprising four transmitter units. In this case it is necessary to provide three control valve mechanism according -to the invention. The receiver may be constituted for example by a diierential hydraulic jack of which the face opposed to that acted upon by the liquid pressure exerted by one of the transmitters is constantly under a hydraulic pressure exerted through a Aconduit C.
Figs. 3 and 4 are enlarged showings of the control valve mechanism 6. In these figures, 'Ia is the valve seat corresponding to the pipe `5a,'whi1le Ib is a valve-seat corresponding to the pipe 5b. Arranged `between these Vvtwo seats is a two-face valve 8 carrying two coaxial rods 9a and Sfb, respectively. Designated by Illa and lIlb are two pistons arranged on both sides of the conduit 4. Within each piston is provided a chamber in which is positioned a ball I2 adapted to close .a coaxial 4opening I3 and to be pressed against ythe latter bya spring :I I. Designated by I5 is an abutment adapted to limit the displacements of l.the iball I2 within the chamber, while by I6 are designated openings permitting the chamber :to communicate l.with the pipes 5a and 5b, respectively. `The .two Apistons laila .and I'Ub are furged, r`the formen-toward 'the left and the latter .toward the ,right as viewed vin Fig. 3, by springs nl.
The A,operation is briefly as follows: If for example `the Itransmitter unit 2 is actuated, the hydraulic .fluid will Vflow into the valve mecha- 11ism.6fthrough .pipe 5b and-push Yto the left the piston 10b whose ball I2, when contacting the valve yrod 3b, will move the two-face valve 8 tothe left .and finally apply said yvalve .against its seat la.. `From this ytime on, as the piston 3 lDb acted upon by the liquid pressure keeps on moving to the left, the movement of ball l2 is stopped by the rod 9b so that the right end of the opening I3 will move away from the ball l2 to permit communication between the chamber within the piston b and the conduit 4. Subsequent movement of the piston lub will bring ball l2 in contact with the abutmentI i5, whereafter the piston lb is immobilized in a position indicated by dash-and-dot lines 10c in Fig. 4, the liquid under pressure being thus allowed to Iiow freely through the piston chamber, past the ball I2, and further through the intermediate conduit 4 into the receiver unit 3. It is clear that the displacement of the valve 8 is entirely independent from the velocity of i'low of the hydraulic fluid. It follows therefrom that owing to the deviceV of the invention a faultless hydraulic transmission can be secured in all conditions of operation.
The .devicer of the invention lends itself to many applications. Thus, for example, it may be used for controlling brakes, for example brakes of a railway train. It may further be applied to allsorts of transmissions to a distance.
This device, however, is particularly intended to be applied to double transmissions, more particularly to double transmissions for use in connection with iiying machines to which it assures full working safety.
It will be understood that the invention is not limited to the particular examples shown, as changes may be made therein without substantially departing from the spirit of the invention which is intended to be defined in the accompanying claims.
What is claimed is:
l. A control valve mechanism for use in connection with hydraulic transmission systems including at least two transmitters and one re- A ceiver, comprising a casing having two inlet chambers and an outlet chamber located between said inlet chambers and communicating with the same through ports, a two-face valve member located between said ports for controlling communication between each of said inlet chambers and said outlet chamber, a stem extending from each'face of said valve member, a pressure responsive valve operating element in each inlet chamber having an opening in alignment with said stems for establishing a communication between the inlet ports and the outlet chamber, and valve means for controlling said openings adapted to act on said stems so as to engage said two-face valve member to interrupt communication between one of said inlet chambers and said outlet chamber on initial movement of the Valve operating element in the other inlet chamber, and to permit communication between the inlet port of Said other inlet chamber and said outlet chamber on subsequent movement of said element. v
2. A control valve mechanism for'use in connection with hydraulic transmission systems including at least two transmitters and a single receiver, comprising two parallel cylindrical inlet chambers provided with inlet ports, an outlet chamber between said inlet chambers and communicating therewith through ports, a twoface valve member in said outlet chamber located between said ports for controlling communication between said inlet chambers and said outlet chamber, a stem extending from each face of said Valve member into one of said inlet chambers, a hollow piston in'each of said inlet cham- 'niA bers responsive to the liquid pressure introduced into said inlet chambers through one or the other of said inlet ports, each piston having an axial opening in alignment with said stems for establishing communication between the spaces at the front and rear of the piston, and check Valves for controlling said openings adapted to act on. said stems so as to engage said two-face valve member to interrupt communication between one of said inlet chambers and said outlet chamber on initial movement of the piston in the other inlet chamber, the arrangement being such that the check valve in said other inlet chamber is opened by the corresponding stem to permit communication between the inlet port of said other inlet chamber and the outlet chamber on subsequent movement of the piston in said other inlet chamber.
3. A control valve mechanism for use in connection with hydraulic transmission systems including at least two transmitters and one receiver connected by pipe lines, comprising a casing, two spaced valve seats arranged within said casing and corresponding each to the respective inlet pipe supplying the liquid under pressure, a two-faced valve member located between said valve seats and adapted to apply against either of them, two opposed rods protruding each from the corresponding valve face, two hollow pistons arranged each within the corresponding end portion of said casing between said rods and said inlet pipes, resilient means interposed between each valve seat and the corresponding piston for limiting the displacement of the latter, a. valve arranged in a hole in each piston and adapted. when the piston is acted upon by the incoming liquid, to cause the two-faced valve member through its respective rod to apply against one of its seats, and intermediate piping leading from the space between said valve seats into said receiver.
4. A control valve mechanism for use in connection with hydraulic transmission systems including at least two transmitters and one receiver connected by pipe lines, comprising a casing, two spaced valve seats arranged within said casing and corresponding each to the respective inlet pipe supplying the liquid under pressure, a two-faced valve member located between said valve seats land adapted to apply against either of them, two opposed rods protruding each from the corresponding valve face, two pistons arranged each within the corresponding end portion of said casing between said rods and said inlet pipes, a counterspring interposed between each valve seat and the corresponding piston for limiting the displacement of each piston, a chamber arranged within each piston, adapted to be lled up with the incoming pressure liquid and provided on its front face with an opening co-aXial with one of said valve rods, a ball disposed in front of said opening and displaceable within said chamber, a second counterspring and an abutment interposed between the bottom of said chamber and said ball for limiting the displacement of the same, and an outlet pipe leading from the space between said valve seats into said receiver, said ball being intended to close said opening when its piston is unactuated bythe pressure liquid, but when it is actuated thereby, rst to cause the said two-faced valve member by vacting upon its respective rod,'to close its remote seat and then to be moved away from said opening by said rod so as to allow said pressure liquid to flow freely through said chamber, past said ball, through said outlet pipe Number out of said casing and into said receiver. 2,342,878 PIERRE AUDEMAR. 2,380,507 2,416,091 References Cited in the le of this patent 5 4911812 UNITED STATES PATENTS Number Name Date Number 2,215,819 Ludeman Sept. 24, 1940 344,397 2,216,855 Sanford Oct. 8, 1940 lo 543,394
2,311,955 Marker Feb. 23, 1943 Name Date Majern Feb. 29, 1944 Eaton July 31, 1945 Fitch Feb. 18, 1947 I-Ioiacker Dec. 20, 1949 FOREIGN PATENTS Country Date Italy of 1936 Great Britain of 1942
US770525A 1946-02-27 1947-08-25 Control valve mechanism Expired - Lifetime US2634743A (en)

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Cited By (30)

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US2738797A (en) * 1951-12-26 1956-03-20 C O Two Fire Equipment Co Two-way check valve
US2761463A (en) * 1953-12-17 1956-09-04 Wagner William Two-way check valve
US2794518A (en) * 1953-09-21 1957-06-04 Trabon Engineering Corp Lubricating system and sequence valve therefor
US2853091A (en) * 1954-05-25 1958-09-23 Napier & Son Ltd Hydraulic apparatus for providing a differential pressure
US2904069A (en) * 1954-10-02 1959-09-15 Teves Kg Alfred Pressure regulator for harmonic pressure distribution
US2918902A (en) * 1954-12-06 1959-12-29 Vickers Inc Single station variable length stroke motor control system
US3454029A (en) * 1965-04-02 1969-07-08 Otis Eng Corp Valves
US3633606A (en) * 1969-08-07 1972-01-11 Air Reduction Automatic changeover valve
US3805825A (en) * 1972-02-22 1974-04-23 Steinen Mfg Co Unitary pneumatic flow director
US3988787A (en) * 1975-05-29 1976-11-02 Colee Donald D Pressure differential valve for swimming pool
US4019525A (en) * 1976-01-22 1977-04-26 Sloan Valve Company Tractor protection valve
US4300352A (en) * 1979-09-10 1981-11-17 The Geolograph Company Hydraulic pressure integrator
FR2527926A1 (en) * 1982-06-04 1983-12-09 Sarsi Andre walker
US4531369A (en) * 1981-03-02 1985-07-30 Hitachi Construction Machinery Co., Ltd. Flushing valve system in closed circuit hydrostatic power transmission
DE3527371A1 (en) * 1985-07-31 1987-02-12 Teves Gmbh Alfred Pressure-actuated reversing valve
US4726190A (en) * 1986-05-19 1988-02-23 International Sanitary Ware Mfg. Cy. Pressure generator with check valve
US5469751A (en) * 1994-05-25 1995-11-28 Sentry Equipment Corp. Manifolded sampling valve assembly
US5878773A (en) * 1997-09-15 1999-03-09 Essef Corporation Auxiliary flow path valve
US6257268B1 (en) 1999-12-01 2001-07-10 Gilmore Valve Company Pressure biased shuttle valve
US6318400B1 (en) 1999-12-01 2001-11-20 Gilmore Valve Company Low interflow hydraulic shuttle valve
US6655405B2 (en) 2001-01-31 2003-12-02 Cilmore Valve Co. BOP operating system with quick dump valve
US20100032036A1 (en) * 2007-06-30 2010-02-11 Festo Ag & Co. Kg Valve with an and-function
US20110232780A1 (en) * 2010-03-24 2011-09-29 Glen Arnott Regulated automatic changeover valve
US20130277594A1 (en) * 2011-01-07 2013-10-24 Mitsubishi Electric Corporation Valve Assembly for a Dispenser for Fluids
US20160230900A1 (en) * 2013-12-13 2016-08-11 Hydac Fluidtechnik Gmbh Valve device
US20170234442A1 (en) * 2010-05-26 2017-08-17 Petrolvalves S.R.L. Intelligent Pressure Relief Device For A Double Isolation Valve
US20180023717A1 (en) * 2016-07-22 2018-01-25 Goodrich Corporation Valve retaining cup
US20190049025A1 (en) * 2017-08-08 2019-02-14 Mando Corporation Check valve
US10895328B2 (en) * 2018-07-30 2021-01-19 Danfoss Power Solutions Aps Hydraulic steering unit
US20220088302A1 (en) * 2020-09-18 2022-03-24 Carefusion 303, Inc. Pressure actuated flow control device for gravity iv sets

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US2215819A (en) * 1939-01-10 1940-09-24 Oscar H Ludeman Boiler feed system
US2216855A (en) * 1938-08-17 1940-10-08 Bendix Westinghouse Automotive Valve mechanism
GB543894A (en) * 1940-08-15 1942-03-18 Edward Dodson Improvements in fluid transmission systems
US2311955A (en) * 1941-05-26 1943-02-23 Pressed Steel Tank Company Oxygen supply apparatus
US2342878A (en) * 1942-07-22 1944-02-29 Warner Aircraft Corp Pressure control device
US2380507A (en) * 1943-06-14 1945-07-31 Bendix Westinghouse Automotive Fluid pressure control mechanism
US2416091A (en) * 1943-08-23 1947-02-18 Bendix Westinghouse Automotive Fluid pressure control mechanism
US2491812A (en) * 1947-04-03 1949-12-20 Fairchild Engine & Airplane Aircraft wheel brake

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Publication number Priority date Publication date Assignee Title
US2216855A (en) * 1938-08-17 1940-10-08 Bendix Westinghouse Automotive Valve mechanism
US2215819A (en) * 1939-01-10 1940-09-24 Oscar H Ludeman Boiler feed system
GB543894A (en) * 1940-08-15 1942-03-18 Edward Dodson Improvements in fluid transmission systems
US2311955A (en) * 1941-05-26 1943-02-23 Pressed Steel Tank Company Oxygen supply apparatus
US2342878A (en) * 1942-07-22 1944-02-29 Warner Aircraft Corp Pressure control device
US2380507A (en) * 1943-06-14 1945-07-31 Bendix Westinghouse Automotive Fluid pressure control mechanism
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US2794518A (en) * 1953-09-21 1957-06-04 Trabon Engineering Corp Lubricating system and sequence valve therefor
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US5878773A (en) * 1997-09-15 1999-03-09 Essef Corporation Auxiliary flow path valve
US6318400B1 (en) 1999-12-01 2001-11-20 Gilmore Valve Company Low interflow hydraulic shuttle valve
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US8689814B2 (en) * 2010-03-24 2014-04-08 Michael D. Holt Company, Llc Regulated automatic changeover valve
US9976663B2 (en) * 2010-05-26 2018-05-22 Petrolvalves S.P.A. Intelligent pressure relief device for a double isolation valve
US20170234442A1 (en) * 2010-05-26 2017-08-17 Petrolvalves S.R.L. Intelligent Pressure Relief Device For A Double Isolation Valve
US9494240B2 (en) * 2011-01-07 2016-11-15 Fast & Fluid Management B.V. Valve assembly for a dispenser for fluids
US20130277594A1 (en) * 2011-01-07 2013-10-24 Mitsubishi Electric Corporation Valve Assembly for a Dispenser for Fluids
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US9869400B2 (en) * 2013-12-13 2018-01-16 Hydac Fluidtechnik Gmbh Valve device
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US20190049025A1 (en) * 2017-08-08 2019-02-14 Mando Corporation Check valve
US10731767B2 (en) * 2017-08-08 2020-08-04 Mando Corporation Check valve
US10895328B2 (en) * 2018-07-30 2021-01-19 Danfoss Power Solutions Aps Hydraulic steering unit
US20220088302A1 (en) * 2020-09-18 2022-03-24 Carefusion 303, Inc. Pressure actuated flow control device for gravity iv sets
US11771826B2 (en) * 2020-09-18 2023-10-03 Carefusion 303, Inc. Pressure actuated flow control device for gravity IV sets

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