Pilot Valve Seated In Motor Or Valve Element Patents (Class 251/38)
  • Patent number: 10544876
    Abstract: A solenoid valve for irrigation systems may comprise a gardening tube, a plastic valve piece, a cover and a magnetic member. The gardening tube has a water inlet channel and a water outlet channel which are communicated, and a valve tube vertically extending from the gardening tube has a valve chamber. The valve piece is positioned in the valve chamber. A second connecting tube vertically protruding from the cover has a housing communicated with the valve chamber, and a solenoid coil and a metal ring are respectively disposed on the second connecting tube. The magnetic member has a magnet installed therein, and the magnet has a first magnetic surface and a second magnetic surface at two ends thereof.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: January 28, 2020
    Inventor: Chin-Yuan Chen
  • Patent number: 10337641
    Abstract: The present disclosure relates to a switch valve unit, a fluid switch, and a fluid switch assembly. The switch valve unit comprises a valve seat which defines a valve cavity having an open bottom end port; an at least partially axially deformable diaphragm member which is mounted in the valve cavity to divide the valve cavity into an upper cavity portion and a lower cavity portion, and provided with a first hole and a second hole spaced from each other and providing fluid communication between the upper cavity portion and the lower cavity portion; a button axially movably mounted on the valve seat; and a valve rod assembly connected to the button so as to follow the movement of the button, extending through the valve seat and into the upper cavity portion, and having a first position to seal the first hole and a second position to depart from the second first hole.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: July 2, 2019
    Assignees: Xiamen Lota International Co., LTd., La Vida Industrial Co., Ltd.
    Inventors: Liming Ye, Jianping Zhou, Shuanglin Bai
  • Patent number: 10280818
    Abstract: A fluid control valve includes a cylindrical housing with at least one opening through a housing wall, a cylindrical main valve axially movably arranged inside the housing for controlling a fluid flow through the at least one opening and a main valve spring member acting on the main valve. The main valve includes a base wall defining a fluid control volume and fluid main volume in the cylindrical housing. The base wall includes an opening for fluidly connecting the fluid control volume with the fluid main volume. The fluid control valve further includes a pilot valve positioned at the base wall opening, which pilot valve is moveably arranged for controlling a fluid flow through the base wall opening, and an electro-mechanical actuator configured to act on the pilot valve for controlling the main valve via the pilot valve. A method for adjusting the axial position of a cylindrical main valve of a fluid control valve is also provided.
    Type: Grant
    Filed: May 12, 2014
    Date of Patent: May 7, 2019
    Assignee: Volvo Truck Corporation
    Inventor: Fredrik Lagerlöf
  • Patent number: 9605764
    Abstract: A float or a near neutral buoyancy weight operated liquid pressure control valve includes a body which together with an end cap form a cavity and retain a diaphragm therein. A back-pressure chamber is formed between the end cap and the diaphragm and the diaphragm includes a seal section which seats on an inlet port. The diaphragm seal also separates the inlet from an outlet formed in the body. A float support arm reciprocally operates a valve opening and closing control pin mounted in an associated bleed passage formed longitudinally through a control pin mounting. In an open mode the bleed passage vents the chamber. In a closed mode the pressure in the chamber displaces the diaphragm to close the valve. A slide is coupled to the diaphragm so as to be displaced therewith and prevent excessive pressure to distort the diaphragm once the seal closes on port.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: March 28, 2017
    Assignee: APEX VALVES LIMITED
    Inventor: David Gordon Arthur Crichton
  • Patent number: 9297475
    Abstract: A system for adjusting water in a domestic water diffuser, in particular for opening and closing water in a shower or bathroom or kitchen sink and for adjusting the flow rate, is described. The system comprises a shutter with at least one metal part slidable inside a cylindrical chamber with a diameter substantially equal to the diameter of the shutter; the system also comprises a pushbutton comprising a magnet; the pushbutton is configured to be operated by means of a finger to mechanically displace the shutter by means of the magnet along an axis of the cylindrical chamber, into two different positions, corresponding to opening of the flow or closing of the flow of water from a diffuser, the pushbutton being also rotatable about the axis, to vary the open position of the shutter along the axis and a corresponding flowrate.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: March 29, 2016
    Inventor: Fabrizio Nobili
  • Patent number: 9285046
    Abstract: An expansion valve according to one embodiment includes a body having an internal passage through which the working fluid flows, a valve hole provided in the internal passage, a driven member that opens and closes a valve section by touching and leaving the valve hole, a guide member that slidably supports the driven member inserted along the guide member, and a shield wall, provided in the driven member, which closes one end opening of the spacing between the driven member and the guide member when the valve section is fully opened.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: March 15, 2016
    Assignee: TGK CO., LTD
    Inventor: Masaaki Tonegawa
  • Patent number: 9200496
    Abstract: A pressure compensating device for compensating fluid pressure within a sealed enclosure comprises a cylinder divided into a first chamber and a second chamber by a piston, wherein: the first chamber communicates with the enclosure and the second chamber communicates with the environment; the piston is arranged to adjust the relative volumes of the first and second chambers in response to a difference in pressure between the said chambers by moving within the cylinder; and the piston is arranged to allow fluid communication between the enclosure and the environment when the piston is in at least one position within the cylinder.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: December 1, 2015
    Assignee: Viper Subsea Technology Limited
    Inventor: Iain Reid
  • Patent number: 8967591
    Abstract: A trip cock device includes a housing, a cam dog, a handle engaging the cam dog, a piston assembly at least partially received within the housing, and a fault detection valve secured to the piston assembly. The piston assembly includes a piston and the fault detection valve is configured to open and close. The fault detection valve engages the cam dog when closed.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: March 3, 2015
    Assignee: Wabtec Holding Corp.
    Inventor: Robert N. Scharpf
  • Patent number: 8936041
    Abstract: There are provided a latch valve consuming less power, having a simpler structure, and guaranteeing reliable valve operation, there is provided a flow control device comprising a plurality of latch valves connected in series, and the second to the last latch valves, among the latch valves connected in series, include an additional outflow path constantly communicating with a space part between a support body and a plunger, respectively, to allow water from an inlet to constantly flow out to the additional outflow paths.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: January 20, 2015
    Assignee: Woongjin Coway Co., Ltd
    Inventors: Young-Sang Yun, Man-Uk Park, Sun-Dug Kwon, Sung-Worl Jin, Ji-Hye Jeong
  • Patent number: 8931754
    Abstract: A safety valve includes a cylinder having an open end and a plug for closing the open end with a hermetic seal. The interior of the cylinder communicates with a high-pressure gas passage. The cylinder is deformed as a function of gas pressure in the high-pressure gas passage to widen the open end. This allows gas in the high-pressure gas passage to escape and thus prevents the gas pressure from increasing beyond an acceptable level.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: January 13, 2015
    Assignees: Jtekt Corporation, Toyooki Kogyo Co., Ltd.
    Inventors: Yoshinori Imoto, Hiroaki Suzuki, Kazushi Numazaki, Chihiro Uchimura, Akira Yamashita, Tsukuo Ishitoya, Noritaka Watanabe
  • Patent number: 8833727
    Abstract: A handle assembly for providing dual flush functionality to a flush valve. The handle assembly comprising a handle and a plunger engagable with each other. The plunger axially slidable in a bush disposed between the handle and the flush valve. The bushing having a passage for receiving the plunger. The plunger having a first and a second axis along which the plunger may travel through the passage. Movement of the handle moves the plunger from first axis to the second axis wherein actuation of the flush valve by the plunger along the first axis results in a different flush volume than actuation along the second axis.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: September 16, 2014
    Assignee: Sloan Valve Company
    Inventor: John R. Wilson
  • Patent number: 8826937
    Abstract: A flush valve has a valve body having an inlet and an outlet, a piston disposed in the valve body between the inlet and the outlet, a cartridge disposed in the outlet and a plurality of check valves disposed serially within the cartridge for preventing backflow through the outlet and wherein vacuum effects are minimized.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: September 9, 2014
    Assignee: Masco Canada Limited
    Inventors: Frank A. Stauder, Xan Vy Du, Robert Kropiniewicz
  • Patent number: 8827237
    Abstract: A fluid flow valve is disclosed which includes a fluid flow assembly, a piston diaphragm assembly, and a reset plunger pin assembly. These three assemblies are configured to engage one another such that, when used in conjunction with a pressurized water source, they will split the pressurized water source into two portions, the one portion defining a main fluid flow pathway through the valve and, a much smaller proportion, defining a metered fluid flow pathway through the valve. The piston diaphragm assembly has a diaphragm or other equivalent structure for defining a metered fluid flow chamber, which metered fluid flow chamber is fluidly engaged to a pressurized water source through a metering channel in a piston. A reset plunger meter pin assembly engages the metered fluid flow or piston chamber of the piston diaphragm assembly and can initiate a timed flow of water or other fluid into the metered fluid flow chamber, which timed flow controls the flow of fluid or water flowing through the fill valve.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: September 9, 2014
    Assignee: Baker Products, Ltd.
    Inventor: Robert Dulin
  • Publication number: 20140053922
    Abstract: A main valve seat surface for engaging the piston, an outer sidewall, and an inner sidewall defining a flow passage with a first opening and an second opening, the flow passage having a reduced diameter portion.
    Type: Application
    Filed: August 19, 2013
    Publication date: February 27, 2014
    Applicant: Sloan Valve Company
    Inventor: John R. Wilson
  • Publication number: 20140008555
    Abstract: A proportional valve is provided comprising a valve (1) comprising a housing (2) having an inlet (3) and an outlet (4), a valve element (5) being positioned between said inlet (3) and said outlet (4), said valve element (5) being moveable in said housing (2), said valve element (5) having a pilot valve opening (7), a first pressure chamber (16), a pressure in said first pressure chamber (16) acting on said valve element (5) in a first direction, a second pressure chamber (17), a pressure in said pressure chamber (17) acting on said valve element (5) in a second direction opposite to said first direction, a pilot valve element (6) cooperating with said pilot valve opening (7) to form a pilot valve, said pilot valve element (6) being actuated by drive means (8), wherein a flow resistance between said inlet (3) and said first pressure chamber (16) is smaller than a flow resistance between said inlet (3) and said second pressure chamber (17).
    Type: Application
    Filed: March 20, 2012
    Publication date: January 9, 2014
    Applicant: DANFOSS A/S
    Inventor: Michael Birkelund
  • Patent number: 8596606
    Abstract: An automate fluid flow control system includes a relief valve for being sealedly disposed within a fluid chamber in an immovable manner to seal a flow of fluid flowing from a fluid inlet to a fluid outlet, and an actuator. The relief valve has a fluid passage for controlling a flow rate of the fluid passing from the fluid chamber to the fluid outlet, and a valve stopper sealedly closing the fluid passage for controlling the fluid flowing from the fluid chamber to the fluid outlet, wherein the valve stopper is driven to move between a closed position that the valve stopper is sealedly retained to close the fluid passage for blocking said fluid passing to the fluid outlet, and an opened position that the valve stopper is moved to unseal the fluid passage for allowing the fluid passing to the fluid outlet through the fluid passage.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: December 3, 2013
    Inventor: Jorge Maercovich
  • Patent number: 8464998
    Abstract: An automate fluid flow control system includes a valve member for being sealedly disposed within a fluid chamber to seal a flow of fluid flowing from a fluid inlet to a fluid outlet, a relief valve having a fluid passage extended along the valve member for communicating the fluid chamber with the fluid outlet and including a valve stopper sitting on a top opening of the fluid passage to sealedly close the fluid passage, and a powering assembly including an actuator to move the relief valve between a closed position that the valve stopper is sealedly retained to close the fluid passage and an opened position that the actuator drives the valve stopper to unseal the fluid passage for releasing a pressure within the fluid chamber to allow the fluid passing to the fluid outlet.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: June 18, 2013
    Assignee: Advanced Modern Technologies Corporation
    Inventor: Jorge Maercovich
  • Patent number: 8196892
    Abstract: A valve includes a body, a cage, a plug, a stem, a stop ring, and a pilot plug. The cage includes at least one cage port there through allowing fluid communication between the fluid inlet and the fluid outlet. The plug is movable linearly within the cage to allow fluid communication between the fluid inlet and the fluid outlet when the valve is open. The pilot plug is adapted to transfer downward force from the stem to the plug by contacting the stop ring of the plug and thereby urging the plug downward through the cage when the stem moves linearly downward to adjust the valve from the closed position to the open position. In an alternative embodiment, the stem includes a collar adapted to contact the plug and adjust the valve from the closed position to an open position.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: June 12, 2012
    Assignee: Dresser, Inc.
    Inventor: J. Asher Glaun
  • Patent number: 8191855
    Abstract: A bypass valve for internal combustion engines for connecting the pressure side to the intake side of a supercharging device. The bypass valve includes an electromagnetic actuator and a valve housing in which a closing component is movably accommodated. The closing component has a valve body, acted upon by pressure and movable in a flow channel, and a switchable sealing element.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: June 5, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Bruno Hezel, Harald Laue
  • Patent number: 8042787
    Abstract: A handle assembly for providing dual flush functionality to a flush valve. The handle assembly comprising a handle and a plunger engagable with each other. The plunger axially slidable in a bush disposed between the handle and the flush valve. The bushing having a passage for receiving the plunger. The plunger having a first and a second axis along which the plunger may travel through the passage. Movement of the handle moves the plunger from first axis to the second axis wherein actuation of the flush valve by the plunger along the first axis results in a different flush volume than actuation along the second axis.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: October 25, 2011
    Assignee: Sloan Valve Company
    Inventor: John R. Wilson
  • Patent number: 7823633
    Abstract: A valve apparatus for controlling fluid flow between a fluid passage and a fluid delivery conduit therein includes a valve housing having first and second housing ports spaced therealong, and a driven member driveable toward and away from the first housing port. A closure member having a port is coupled to the driven member and slidable therealong. The driven member and closure member close and open the closure member port during movement of the driven member toward and away from the first port to induce and relieve a pressure differential, exerted on the closure member by fluid entering the housing, acting to slide the closure member along the driven member to close the first housing port. An inductive coil extends about an open end of the housing to receive a coil-equipped end of a probe therein to communicate the probe with monitoring and control systems across the valve.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: November 2, 2010
    Inventor: Mark David Hartwell
  • Publication number: 20100155633
    Abstract: A control valve includes a main poppet that moves in response to pressure in a primary control chamber and thereby controls the flow of fluid through a valve seat between first and second ports. A passageway extends between the second port and the primary control chamber and includes a variable flow restriction that decreases as the main poppet moves away from the valve seat. An electrohydraulic pilot valve has a pilot poppet which controls fluid flow from the primary control chamber to the first port in response to pressure in a pilot control chamber. A sub-pilot valve selectively releases pressure in the pilot control chamber to operate the pilot poppet to open and close a path between the inlet and the outlet. Using an electrohydraulic pilot valve enables the main poppet to operate quickly in controlling large fluid flow rates. Unidirectional and bidirectional versions of the control valve are described.
    Type: Application
    Filed: November 16, 2009
    Publication date: June 24, 2010
    Inventor: Joseph L. Pfaff
  • Patent number: 7607635
    Abstract: A dual mode flush valve includes a handle assembly having a handle, a bushing and a plunger. The bushing has a sleeve with a passage therethrough for mounting the plunger for sliding and tilting. The passage is defined by first and second partially overlapping bores that coincide at the inner end of the sleeve and are spaced one above the other at the outer end of the sleeve. The bores define a horizontal plunger travel axis and an angled plunger travel axis. Depending on which direction the user actuates the handle the plunger will travel along one of these axes. Travel along the angled axis will lower the plunger tip, allowing earlier clearance of a relief valve and a reduced flow through the flush valve compared to actuation with the plunger travel along the horizontal axis.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: October 27, 2009
    Assignee: Sloan Valve Company
    Inventor: John R. Wilson
  • Patent number: 7556237
    Abstract: Tilting of a main valve assembly under high inlet pressure conditions is prevented by supporting the main valve assembly with housing rib engaging a skirt on the main valve guide tube. Pilot valve opening results from contact of an enlargement on the pilot valve stem with the push rod as the pilot valve begins its upward movement. An off center baffle compensates for the pressure pattern resulting from the side entry inlet. Throttling structure provided by a skirt on the guide tube cooperating with a shoulder in the outlet passage provides a desirable large flush flow. The inlet and handle openings in the valve body include bosses adjacent thereto an internal to the housing.
    Type: Grant
    Filed: July 5, 2007
    Date of Patent: July 7, 2009
    Assignee: Sloan Valve Company
    Inventor: Dwight N. Johnson
  • Patent number: 7516938
    Abstract: A diaphragm assembly for use in conventional diaphragm-type flush valves includes a flexible diaphragm body having a first side and a second side and a bypass orifice filter insert defined in the diaphragm body. The second side of the diaphragm body includes an annular protrusion and a plurality of protruding ribs, wherein a recess area is defined between the rib and the protrusion. When a pressure difference is applied across the diaphragm body, the second side of the diaphragm body is concave and the first side of the diaphragm body is convex, whereby a distance between the rib and the protrusion decreases in order to prevent the diaphragm body from closing two quickly against a valve seat of a flush valve. A method for controlling pressure differences across the diaphragm body is also disclosed.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: April 14, 2009
    Assignee: Zurn Industries, LLC
    Inventors: Michael A. Funari, J. Timothy O'Connor
  • Patent number: 7487950
    Abstract: Tilting of a main valve assembly in unison with the head portion of a pilot valve under high inlet pressure conditions is prevented by supporting the main valve assembly with housing rib engaging a skirt on the main valve guide tube opposed to the handle actuated push rod. A positive, toggle like pilot valve opening results from contact of an enlargement on the pilot valve stem with the push rod as the pilot valve begins its upward movement. An off center baffle in the inlet passage compensates for the non uniform pressure pattern resulting from the side entry inlet. The pilot valve head includes an easily replaceable cup shaped seal having a reentrant rim engaging the pilot valve surface in the main valve member and having an upper central portion engaging an abutment with a valve rotator configuration is the full open position. A secondary throttling structure provided by a skirt on the guide tube cooperating with a shoulder in the outlet passage provides a desirable large flush flow for siphon fixtures.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: February 10, 2009
    Assignee: Sloan Valve Company
    Inventor: Dwight N. Johnson
  • Patent number: 7478793
    Abstract: A filler spout comprising a tubular body having a transverse partition pierced by an opening forming a valve seat which is associated with a main valve member that is connected to a piston extending in a pilot cavity connected to an exhaust orifice and to a pilot duct having a pilot orifice provided with a controlled pilot valve member, the pilot duct opening out to a face of the piston that causes the main valve member to move towards an open position when the pilot duct is fed with a liquid under pressure.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: January 20, 2009
    Assignee: Serac Group
    Inventor: André Graffin
  • Patent number: 7341236
    Abstract: A pilot operated valve has a main poppet that selectively controls flow of fluid between first and second ports in response to pressure in a control chamber on one side of the main poppet. The main poppet has an aperture extending between the control chamber and the first port. A pilot piston slides within the aperture and has the pilot passage with a pilot orifice and a first disk spring biases the pilot piston with respect to the main poppet. A pilot valve element selectively engages the pilot orifice to open and close the pilot passage and thereby controls motion of the main poppet. Forces from the first disk spring and a pressure differential between control and pilot chambers alter a position of the pilot valve seat with respect to the main poppet. The change in position compensates for effects on valve operation due to variation of the pressure at the two ports.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: March 11, 2008
    Assignee: HUSCO International, Inc.
    Inventors: Dwight B. Stephenson, Xiaolong Yang, Randall J. Jackson, R. Christopher Hughes
  • Patent number: 7296593
    Abstract: A switching valve assembly 32 for use in a mixing faucet is disclosed. The switching valve assembly comprises a switching valve assembly 32 for use in a mixing faucet, which comprises a manual operation member 36 adapted to be moved in response to a pressing operation by a user, a push rod 35 having a base end joined to the manual operation member, a pilot valve 40 disposed relative to a distal end of the push rod, a coil spring 42 interposed between the pilot valve and the distal end of the push rod, a diaphragm main valve 46 having a pilot-valve port designed such that the pilot valve is selectively brought into contact therewith and separated therefrom, a pressure chamber 48 formed on the side of a back surface of the main valve to contain a part of the push rod, the pilot valve and the coil spring, and a valve seat 52 designed such that a front surface of the main valve is selectively seated thereon and unseated therefrom.
    Type: Grant
    Filed: September 1, 2003
    Date of Patent: November 20, 2007
    Assignee: Toto Ltd.
    Inventors: Hideyuki Matsui, Osamu Tokunaga
  • Patent number: 7261275
    Abstract: An improved relief valve for use in a diaphragm flush valve is constructed having a sealing member provided with an exteriorly threaded shaft extending down into the diaphragm flush valve with a smaller diameter metal stem extending from the bottom of the shaft, a sleeve member slidable along the metal stem and having a vertically aligned slit in its side wall, and a retaining member adjustably vertically positioned on the threaded sealing member shaft, wherein the retaining member having a stop element extendable into the vertical slit to prevent the sleeve member from dropping further than a predetermined distance from the bottom of the threaded shaft.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: August 28, 2007
    Inventor: Wilton J. Pino
  • Patent number: 7198249
    Abstract: An electromagnetic shuttle valve with two valve passages (5, 6) provides an increased cross-section of the second valve passage (6) by increasing the diameter of the second valve closure member (8). To this end, a compression spring (17) which biases the second valve closure member towards the first valve closure member (7) is arranged inside the second valve closure member (8) and the second valve seat (27). It abuts a radial projection formed on the housing sleeve (1) below the second valve seat (27). In order to provide an even larger cross-section of the second valve passage (6), the housing sleeve diameter can increase around the second valve seat (27). In this case, the housing sleeve can include a bulged collar 9 to provide a stop for axial movement during assembly.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: April 3, 2007
    Assignee: Continental Teves, Inc.
    Inventor: Yuji Nakayasu
  • Patent number: 6971625
    Abstract: A valve assembly having a valve body, a piston, a modulating plug, a valve cover adjoining the valve body, and a throttling member. The valve body has an inlet and outlet port, a partition with a valve seat separating the valve body into a first and second flow passage. The piston has a throughbore including an orifice, reciprocably mounted in the valve body and movable between a first and second position. The modulating plug, in abutting contact with the piston and reciprocably mounted in the valve body, gradually moves between an open position, permitting a main fluid flow, and a closed position engaging the valve seat, blocking the main fluid flow. The throttling member is adapted to insure a gradual alteration of the cross-section of the orifice upon piston movement. A method of gradually opening the valve assembly modulating plug is also set forth.
    Type: Grant
    Filed: October 1, 2003
    Date of Patent: December 6, 2005
    Assignee: Parker Hannifin Corporation
    Inventors: Paul G. Szymaszek, Ricky J. VanSeters
  • Patent number: 6959904
    Abstract: The device comprises: a solenoid valve of the bistable type controlled by means of an operating winding; a control circuit coupled for operation to a power supply source and capable of supplying to the operating winding of the solenoid valve a first and a second current pulse, for opening and closing the solenoid valve respectively; and a detecting and operating device associated with the said solenoid valve, capable of detecting a predetermined dangerous operating condition thereof, and of causing, in such a case, the automatic reclosing of the valve for cutting off the flow of the fluid.
    Type: Grant
    Filed: May 27, 2003
    Date of Patent: November 1, 2005
    Assignee: Elbi International S.p.A.
    Inventor: Danilo Beraldo
  • Patent number: 6796515
    Abstract: A one touch valve for activating fluid flow between an inlet conduit and an outlet conduit is disclosed. The valve has a flow cylinder defining an inflow chamber in fluid communication with the inlet conduit and an outflow chamber in fluid communication with the outlet conduit. The flow cylinder includes an end plate and an intermediate plate having a center collar with an aperture. A flexible diaphragm is provided with a sealing surface in contact with the collar to create a seal. The diaphragm has an edge coupled to the intermediate plate and a small diameter hole providing fluid contact between the inflow chamber and an intermediate chamber which is defined by the intermediate plate of the flow cylinder. A plunger is placed on the diaphragm to create a seal with the opposite surface of the diaphragm from the sealing surface. A shaft has one end connected to the plunger and extends through the aperture of the diaphragm.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: September 28, 2004
    Assignee: L. R. Nelson Corporation
    Inventors: Lawrence P. Heren, Scott Jacobs, Timothy R. Casica
  • Patent number: 6691937
    Abstract: A one touch valve for activating fluid flow between an inlet conduit and an outlet conduit is disclosed. The valve has a flow cylinder defining an inflow chamber in fluid communication with the inlet conduit and an outflow chamber in fluid communication with the outlet conduit. The flow cylinder includes an end plate and an intermediate plate having a center collar with an aperture. A flexible diaphragm is provided with a sealing surface in contact with the collar to create a seal. The diaphragm has an edge coupled to the intermediate plate and a small diameter hole providing fluid contact between the inflow chamber and an intermediate chamber which is defined by the intermediate plate of the flow cylinder. A plunger is placed on the diaphragm to create a seal with the opposite surface of the diaphragm from the sealing surface. A shaft has one end connected to the plunger and extends through the aperture of the diaphragm.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: February 17, 2004
    Assignee: L. R. Nelson Corporation
    Inventors: Lawrence P. Heren, Scott Jacobs, Timothy R. Casica
  • Patent number: 6588724
    Abstract: An on-off valve that operates between an open position and a closed position, particularly with high-pressure working fluids. has a valve body that defines a valve cavity. A valve poppet is slidably mounted within the valve cavity. A bushing is mounted with respect to the valve body and divides the valve cavity into a first chamber and a second chamber. One end of the valve poppet is positioned within the first chamber and an opposite end of the valve poppet is positioned within the second chamber. A spring urges the valve poppet into the first chamber. An actuating pin is slidably mounted with respect to the valve body. In the closed position, the actuating pin seals the passage of the valve poppet. An actuator is used to operate the actuating pin between the open position and the closed position of the on-off valve.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: July 8, 2003
    Assignee: Jetec Company
    Inventor: Gene G. Yie
  • Publication number: 20030075700
    Abstract: The present invention provides a valve assembly comprising a first passageway including a first port, a second port defining a restrictive orifice, a third port, and a first valve seat defining a first orifice, a second passageway extending from the third port and including a minimum cross-sectional area defined by a minimum orifice, and also including a second valve seat defining a second orifice, a first piston sealingly disposed in the first passageway between (i) the first port and (ii) the second and the third ports, and configured to seal the first orifice, and a second piston disposed in the second passageway between the third port and the second valve seat, and configured to seal the second orifice, wherein the minimum cross-sectional area of the minimum orifice is larger than the cross-sectional area of the restrictive orifice, and wherein the second orifice is characterized by a smaller cross-sectional area than that of the first orifice.
    Type: Application
    Filed: October 24, 2001
    Publication date: April 24, 2003
    Inventors: Erick Girouard, Christopher Green
  • Patent number: 6443420
    Abstract: The solenoid valve has two fluidic connections (3, 4), a solenoid (5) and a core (8) guided in a cylinder (7) within the solenoid body (6). The solenoid valve (1) is opened as a result of the movement of the core (8) when the solenoid (5) becomes magnetized. After disconnection of the solenoid (5), it is closed due to the force of a spring (27). Both the core and the closing device of the valve (1) are pressure-relieved, in that the end face of the core (8) has an effective surface which corresponds to an effective surface (18) at the valve body (14). The elastic main seat seal (20) is contained in the housing (2). The taper-ended main valve seat (13) and the compensation diameter (12) are housed in combination within a movable seat bushing (11).
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: September 3, 2002
    Assignee: Burkert Werke GmbH & Co.
    Inventor: Gerhard Hettinger
  • Patent number: 6398182
    Abstract: A discharge valve is provided to open an electrically controlled pilot valve in emergency situations such as during an electrical or hydraulic failure. The discharge valve has a poppet that operates in response to a pressurized control signal, which may be produced by a hand operated pump. When the poppet opens in response to the control signal, a path is established for fluid to flow from a control chamber of the pilot valve, thereby opening the latter valve.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: June 4, 2002
    Assignee: HUSCO International, Inc.
    Inventor: Dwight B Stephenson
  • Patent number: 6318406
    Abstract: A pilot operated safety relief valve (14) having a main piston valve member (26). A dome chamber (42) is provided in the valve body (18) over piston valve member (26) and a cap (44) forms a closure for dome chamber (42). A pilot valve (46) is mounted on the cap (44) and has a diaphragm actuated fluid inlet sensing tube (60) received within a bore (30) of the piston valve member (26). Inlet fluid pressure is communicated through bore (61) of sensing tube (60) to the inlet fluid sensing chamber (84) on the outer side of diaphragm (65). Exhaust chamber (56) is positioned between dome chamber (42) and inlet sensing chamber (84). Adjustment spring (67) continuously urges O-ring (72) in dome chamber (42) to a seated position on seat (70). An annular clearance (78) is provided between sensing tube (60) and piston (26) for providing a restricted fluid flow between dome chamber (42) and the inlet (20).
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: November 20, 2001
    Assignee: Tyco Flow Control, Inc.
    Inventor: Jeff A. Conley
  • Patent number: 6299127
    Abstract: A flush valve for use on toilet devices such as urinals and water closets includes a body having an inlet and an outlet. There is a valve seat in the body and a valve member movable within the body toward and away from the valve seat to control water flow between the inlet and the outlet. A housing is mounted on the valve body and there is a chamber within the housing. A piston is movable axially within the chamber and into the valve body for contact with the valve member to cause actuation thereof. There is a spring within the chamber which normally biases the piston outwardly from the valve body. A controlled passage in the housing connects the valve body inlet and the chamber to provide water under pressure to move the piston, against the spring, into the valve body to cause operation of the valve member. The improvement comprises a groove in the exterior of the piston, which groove is adjacent and faces a wall of the chamber.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: October 9, 2001
    Assignee: Sloan Valve Company
    Inventor: John R. Wilson
  • Patent number: 6267349
    Abstract: A precision valve control for an hermetically sealed hydraulic valve system which operates with a solenoid driven magnetic actuator. The magnetic actuator forms a toroidal magnetic force field of varying strength which causes controlled movement of a core rod linked to a pilot. The pilot, in turn, causes actuation of the main disc to the desired valve position. Actual valve position is remotely ascertained, by position of the magnet (or core) within the magnetic field, by means of a Linear Variable Differential Transformer (LVDT). The LVDT creates variable voltages predeterminately related to position of the rod within the magnetic field. The LVDT voltage is compared, by an electronic comparator, to an input command voltage, calibrated to a specific valve position. Deviation between the LVDT voltage feedback signal and input command voltage signal causes generation of an error signal which is amplified and applied to the solenoid to vary the magnetic field to correct the valve position.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: July 31, 2001
    Assignee: Target Rock Corporation
    Inventors: Karl G. Gomes, Vito Liantonio
  • Patent number: 6220565
    Abstract: A main valve (5) has a first valve seat (11) to which a compression spring (21) urges a first closure member (14). A restricting passage (16) and an actuation chamber (17) for valve closing are arranged within the first closure member (14) in order. A valve-opening holding chamber (25) is formed from an inner space defined by a fitting wall (23) with which the first closure member (14) fits at a final time of its closing movement. The actuation chamber (17) communicates with a second valve seat (31) of a pilot valve (6). A pushing spring (37) brings a second closure member (34) into closing contact with the second valve seat (31). The second valve seat (31), the first valve seat (11), the actuation chamber (17) and the valve-opening holding chamber (25) have respective sectional areas (S), (T), (U) and (V) set to values enlarging one after the other in the mentioned order.
    Type: Grant
    Filed: February 15, 2000
    Date of Patent: April 24, 2001
    Assignee: Kabushiki Kaisha Kosmek
    Inventors: Keitaro Yonezawa, Tsutomu Shirakawa
  • Patent number: 6149124
    Abstract: A pilot operated control valve has a body with an inlet and an outlet. A main valve poppet is movable within the body to selectively control flow of fluid between the inlet and outlet. The main valve poppet has a flexible diaphragm with a pilot passage therethrough which is opened and closed by movement of a pilot poppet. The diaphragm flexes due to a pressure differential that acts on the pilot poppet, which flexing compensates for adverse effects that the pressure differential has on the operation of the pilot poppet.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: November 21, 2000
    Assignee: Husco International, Inc.
    Inventor: Xiaolong Yang
  • Patent number: 6098647
    Abstract: A hydraulically controllable valve for double-acting consumers that in the lowering mode drains off a flow of load volume from connection B to connection A in throttled fashion. To that end, the valve has a valve seat (5), which communicates with a sealing face (4) of a main piston (3). A pilot piston (8) is guided concentrically in the main piston (3) and communicates with a sealing face (7) to a pilot valve seat (6) in the main piston; the main piston (3) and the pilot piston (8) are held on the valve seat (5) and pilot valve seat (6), respectively, by the load pressure and/or by spring force. On the pressure-relieved side, the pilot piston (8) has a piston shank (9), guided in a seat bore, with a continuously decreasing throttling action and in particular throttle grooves (10), which form a throttle restriction.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: August 8, 2000
    Assignee: Beringer-Hydraulik AG
    Inventors: Hubert Haussler, Ivan Hristov, Hans Staiger, Josef Zurcher
  • Patent number: 6076550
    Abstract: A solenoid comprising a solenoid coil having a longitudinal hole at the center of a bobbin made of a non-magnetic material and a coil winding wound around the peripheral wall of the bobbin. A yoke comprising a peripheral side plate, an upper end plate and a lower end plate all for the covering the outer peripheral surface and both end surfaces of solenoid coil, a pole core disposed at one end of the longitudinal hole and a plunger fitted slidably into the other end of the longitudinal hole. The solenoid further comprises a protrusion member for forming an irregular magnetic field, formed integrally at the center of the yoke, and a recess for fitting the protrusion member from the end surface of the peripheral wall of the bobbin formed in the peripheral wall.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: June 20, 2000
    Assignee: Toto Ltd.
    Inventors: Kazuo Hiraishi, Itsunao Koga, Hiroyuki Seki, Taisuke Houei, Takanobu Matsufuji, Yoshinori Nishimoto, Katsuhiro Kawahara
  • Patent number: 6036167
    Abstract: Solenoid-actuated control valves having low hysteresis include an annular flux housing with an axial bore extending therethrough. A coil configured to generate a magnetic field is disposed within the flux housing. A magnetic pole piece is disposed within the flux housing axial bore. A magnetic armature is slidably secured within the flux housing axial bore. A spring, positioned between the pole piece and armature, is configured to urge the armature away from the pole piece. A spool valve, slidably secured within a spool sleeve, is mechanically coupled with the armature such that the spool valve follows movement of the armature as a slave.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: March 14, 2000
    Assignee: Fasco Controls Corp.
    Inventor: Richard A. Wade
  • Patent number: 6017015
    Abstract: In a magnetically operated drain valve of an electrohydraulic lifting mod comprising a closing element which in the closing direction is assigned to a main valve seat, a pilot valve which is actuable by the magnet and arranged in a control chamber of the closing element, a throttle arranged upstream of the control chamber, and a closing member of the pilot valve which is adjustable by the magnet against a spring, the closing member being actuable by the magnet against the spring acting either in the closing adjustment direction or in the opening adjustment direction, a spring with a steep characteristic curve is used as the spring, and the closing element and the main valve seat form a lift-dependent flow-quantity adjusting device.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: January 25, 2000
    Assignee: Heilmeier & Weinlein Fabrik fur Oel-Hydraulik GmbH & Co. KG
    Inventor: Martin Heusser
  • Patent number: 5954311
    Abstract: A valve (1, 2) of the kind that is caused to open and close in consequence of the opening and closing of a bleed orifice (15) by a movable pilot valve element (3, 4, 5), characterised in that said element (3, 4, 5) is displaced from sealing relationship with the orifice (15) by a torque resulting from a force applied (7, 9) to the element (3, 4, 5) along a line of action which does not extend through the orifice (15). Another embodiment of the pilot valve element consists of a cylindrical magnet housed in an elastometric tire actuated by a permanent magnet of electromagnet (FIGS. 5-8). Actuators of the torque causing force include a solenoid (FIGS. 1-2), float (FIG. 3), and fluid pressure (FIG. 4).
    Type: Grant
    Filed: April 1, 1998
    Date of Patent: September 21, 1999
    Assignee: Nu-Valve Pty Ltd
    Inventor: Gary Keith Thorpe
  • Patent number: 5904334
    Abstract: A dispensing valve for dispensing a liquid including a valve housing having a fluid inlet and a fluid outlet, an armature positioned in the housing, the armature being reciprocal between an open and closed position, a sealing disk fixedly secured to a sealing end of the armature for sealing engaging a valve seat positioned about the fluid outlet for providing selective fluid communication between the fluid inlet and the fluid outlet and a flow control device positioned in the fluid outlet for providing a substantially quiet and constant flow of liquid through the fluid outlet. The flow control device including a high pressure region and a low pressure region downstream of the high pressure region with the high pressure region of the flow control device including a flow control orifice having an inside diameter less than a diameter of the fluid outlet and the low pressure region of the flow control device intersects the high pressure region of the flow control device.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: May 18, 1999
    Assignee: The Horton Company
    Inventors: Jordan Bryce Grunert, James R. Shannon