Class / Patent application number | Description | Number of patent applications / Date published |
137538000 | Piston-type valves | 23 |
20080271793 | Load-Pressure-Operated Flow Rate Regulator with Vibration Damping - The invention relates to a load-pressure-controlled fees flow regulator ( | 11-06-2008 |
20090000675 | COMBINED RELIEF VALVE AND CHECK VALVE - A combination check valve and relief valve has a valve body with an inlet, an outlet, and a valve chamber operatively interposed between the inlet and outlet. A check valve may be integrated with the relief valve and therefore simplify a hydraulic system. The valve includes a relief valve member which is within the valve chamber. The valve also includes a resilient member with a first end and a second end. The first end of the resilient member operatively engages the relief valve member. The valve includes a setting member pressure-fit within the valve chamber to operatively engage the second end of the resilient member. The resilient member is resiliently biased between the setting member and the relief valve member to bias the relief valve member against a relief valve seat, whereby, when pressurized fluid communicates with the inlet, the resilient member is compressed, and the relief valve member disengages its seat to enable the fluid to pass through to the outlet. | 01-01-2009 |
20090032122 | Check Valve Structure for Use in Pump of Hydraulic Cylinder - A check valve for use in pump of hydraulic cylinder comprises a check valve including a tubular member disposed therein and having a sheath member received therein, a pump including a chamber provided in an output pipe thereof for receiving the check valve, wherein the tubular member is constructed in the form of a hollow cylinder and includes a sealing sleeve fitted therearound, and includes an oil seal mounted on the front end thereof for the engagement with a hollow screw element in the chamber; the sheath member is comprised of a hollow cap member, a first spring element, a ball, a hollow disc element which are placed into the tubular member in turn, and a second spring element. By using the disc element and the second spring element, the tubular member may be fixed in the chamber, and by way of the screw element, the tubular member is enclosed in the chamber. | 02-05-2009 |
20090032123 | Check Valve - A check valve having a piston-like ball or stopper a pre-determined distance from the valve seat so that the ball or stopper seats against the valve seat only under backflow pressure. | 02-05-2009 |
20090101218 | Valve means - A valve means has a valve housing, in which an inlet duct for pressure fluid extends, the duct opening into a valve chamber, in which a valve member is held by spring means in a closed position engaging a valve seat, the valve member opening at a predetermined opening pressure of the pressure fluid present so that pressure fluid arrives by way of an opening cross section at a fluid outlet and flows from it, and the valve means comprises a control duct by way of which pressure fluid flows into a control chamber, in which a control member is held clear of a control seat by spring means in an open position, the control chamber being connected by way of a connecting duct with the valve chamber; and in which the control member so controls the exit flow of the pressure fluid that the control member is able to be shifted, prior to opening of the valve member at a control pressure below the opening pressure into engagement with its control seat so that the passage of fluid between the control chamber and the valve chamber is shut off and that in the open position of the valve member and during exit flow of the pressure fluid via the control chamber the control member, with a fall in pressure below the control pressure, shifts into its open position and the connection duct is opened with the result that pressure fluid can leave via the control chamber. | 04-23-2009 |
20100037965 | Check valve with separate spherical spring guide - A check valve for use with a pump is disclosed. The check valve may have a body at least partially defining a central bore with an open end and a closed end, and a spring guide separate from the body and disposed within the closed end of the central bore. The check valve may also have a spring located within the central bore and having a first end operatively engaged with the spring guide, and a valve element operatively engaged with a second end of the spring and being movable by a pressure differential to compress the spring. The spring guide may be moveable relative to the body. | 02-18-2010 |
20100084028 | Soft seat pilot-to-open check valve - A pilot-to-open soft seat check valve having a soft seat and zero leakage is described. The check valve includes a valve body with a poppet bore and an annular valve seat around the bore; a poppet moveable axially between open and closed positions within the bore, the poppet having an annular valve face; a spring urging the poppet to its closed position with the annular valve face against the valve seat; an annular O-ring clamp around the bore adjacent the valve seat, the clamp including an annular O-ring channel with a radially inward open groove exposing the O-ring to the bore; and a resilient O-ring within the channel, whereby the poppet contacts the O-ring ring when the poppet is in its closed position and the O-ring is held in the O-ring channel by the O-ring clamp when the poppet is in its open position. | 04-08-2010 |
20100096028 | ANTI-BACKFLOW VALVE - An anti-backflow valve, including a valve seat and a plug slidingly disposed in the valve seat, is provided. The valve seat has a ring portion protruding inwards at a middle section of a flow passage thereof. The ring portion has a seat portion extended outwards on one side thereof. The plug has an accommodating chamber recessed inwards on one side thereof. The accommodating chamber has an opening radially penetrating through the plug at one end thereof distant from an inlet. The plug has a protruding portion at one end thereof adjacent to the inlet. An outer diameter of the protruding portion is larger than an inner diameter of the ring portion. A spring is provided between the protruding portion and the ring portion, and a portion of the plug penetrating through the ring portion has an O-ring engaged thereon corresponding to the seat portion. | 04-22-2010 |
20100206405 | PILOT OPERATED CHECK VALVE - A hydraulic valve having a first fluid chamber hydraulically connected to a pressure source, a second fluid chamber hydraulically connected to a pressure operator, and a blocking member for controlling fluid flow between the first and second chambers. The blocking member substantially blocks fluid flow between the first and second chambers when a pressure of fluid in the first chamber is greater than a minimum pressure and less than a pressure of fluid in the second chamber. The blocking member is displaceable to enable fluid flow between the first and second chambers when the pressure of fluid in the first chamber is below the minimum pressure. | 08-19-2010 |
20110079302 | Pump Valve with Full Elastomeric Contact on Seat - This invention relates to valve assemblies having a valve seat body having an axial bore therethrough; wherein the valve seat body has an inclined seat surface located on an upper end of the seat body. The valve assemblies further include a valve member having a valve body such that the valve body is positioned within the axial bore of the valve seat body. A seal is disposed between the seat surface of the seat body and an annular seal surface of the valve member such that the seal prevents contact between the seat surface of the seat body and the valve member. | 04-07-2011 |
20110162732 | ANTI-SIPHON CHECK VALVE - An anti-siphon check valve assembly | 07-07-2011 |
20120103442 | RELIEF VALVE FOR OIL PUMP - A relief valve for an oil pump, may include a housing defining a relief space, a plunger slidably disposed in the relief space and dividing the relief space into a housing chamber and a plunger chamber, an elastic member elastically supporting the plunger and being compressed by oil pressure of the main gallery, wherein the oil pressure of the main gallery may be relatively lower than an oil pressure under a warm-up state of the engine, a locator disposed under the plunger and supporting the elastic member, a plug coupled to a lower portion of the housing under the relief space and supporting the locator such that a modulus of elasticity in the elastic member may be changed by a change in seat position of the elastic member, and a negative pressure supplier selectively generating negative vacuum pressure in the locator such that a height of the locator changes. | 05-03-2012 |
20120222760 | VALVE CARTRIDGE FOR PUMP SYSTEMS - An illustrative valve cartridge for a pump system is disclosed. In one example the valve cartridge includes a cartridge body, a mounting flange operatively coupled to the cartridge body, wherein the mounting flange is adapted to be coupled to a housing of a pump, a valve member that is adapted to sealingly engage a valve seat within the pump housing and an actuator positioned within the cartridge body, wherein the actuator is operatively coupled to the valve member via a connector and wherein the actuator is adapted for selectively moving the valve member relative to the valve seat when the valve cartridge is operatively coupled to the pump housing. | 09-06-2012 |
20120227839 | Check Valve Assembly for Well Stimulation Operations - A check valve assembly for well stimulation operations. The check valve assembly includes a valve body having an axially extending passageway including an inlet and a valve body seat. The valve body has a discharge port extending laterally from the passageway. A valve cap slidably engages with the valve body and has an opening with a valve cap seat. A piston is disposed within the passageway. In a closed position, a first sealing surface of the piston engages the valve body seat to prevent fluid communication between the inlet and the discharge port. In an open position, a second sealing surface of the piston engages the valve cap seat allowing fluid communication between the inlet and the discharge port. A spring disposed within the passageway between the piston and the valve cap biases the piston toward the closed position. | 09-13-2012 |
20130014838 | RELIEF DEVICE FOR OIL PUMPAANM AKAISHI; NobuyukiAACI SaitamaAACO JPAAGP AKAISHI; Nobuyuki Saitama JPAANM Ikawa; MasatakaAACI SaitamaAACO JPAAGP Ikawa; Masataka Saitama JPAANM Ueta; YasuhiroAACI SaitamaAACO JPAAGP Ueta; Yasuhiro Saitama JPAANM Ishioka; TakujiAACI SaitamaAACO JPAAGP Ishioka; Takuji Saitama JPAANM Kamiyama; HidehikoAACI TochigiAACO JPAAGP Kamiyama; Hidehiko Tochigi JPAANM Yamazaki; TakuyaAACI TochigiAACO JPAAGP Yamazaki; Takuya Tochigi JPAANM Umezawa; YoshiroAACI GunmaAACO JPAAGP Umezawa; Yoshiro Gunma JPAANM Inoue; HirokazuAACI GunmaAACO JPAAGP Inoue; Hirokazu Gunma JPAANM Kurokawa; YoshitakaAACI GunmaAACO JPAAGP Kurokawa; Yoshitaka Gunma JP - A relief device includes a relief housing constituted by a relief inflow portion, a valve passage portion, a recess, and an oil discharge portion having a relief hole; a relief valve having a small-diameter portion between a first large-diameter portion and a second large-diameter portion; and a spring elastically biasing the relief valve toward the relief inflow portion. The recess is formed at a position that is closer to the relief inflow portion side than to the oil discharge portion, the axial length of the recess is larger than the axial length of the first large-diameter portion of the relief valve, and the shortest axial distance between the recess and the relief hole is less than the axial length of the small-diameter portion. | 01-17-2013 |
20130146159 | FLOW CONTROLLABLE CONNECTOR FOR HOME APPLIANCES - A flow controllable connector for home appliances, which diverges or extends a passage of fluid by fastening an inlet having a first passage and an outlet having a second passage to tubes using fastening devices. The connector includes a control device disposed between the inlet and the outlet in order to prevent the fluid from flowing back as well as to control a flow rate. The control device performs both the function of preventing the fluid from flowing back and the function of controlling the pressure of the fluid. This makes it possible to prevent an electric/electronic sub-assembly from malfunctioning or abnormally operating, thereby increasing the longevity and reliability thereof. | 06-13-2013 |
20130233413 | PRESSURE RELIEF VALVE WITH ORIFICE - A pressure relief valve includes a housing including an inlet chamber adapted to be in communication with an outlet of a pump and an outlet chamber adapted to be in communication with a pump inlet. The housing includes a bore having a first end in communication with the inlet chamber and a main spill aperture in communication with the bore and the outlet chamber. A piston includes an orifice and an axially spaced apart aperture. The piston is axially moveable within the bore between a first position whereat the piston seals the inlet chamber from the outlet chamber, a second position whereat the inlet and outlet chambers are in fluid communication with one another via only the orifice, and a third position whereat the inlet and outlet chambers are in fluid communication with one another via the orifice and the aperture. A spring biases the piston toward the first position. | 09-12-2013 |
20140116541 | OIL RELIEF VALVE - An oil relief valve apparatus may include a valve hole that may be formed in a pump housing of an oil pump and may be provided between an oil passage and a relief passage to communicate therebetween, a plunger provided on an upper end of the valve hole, a support provided on a lower end of the valve hole, and an elastic member provided between the plunger and the support to elastically support the plunger, wherein the valve hole has an upper portion and a lower portion and may be provided with the plunger that have different cross sectional areas therein, wherein the plunger has an upper end and a lower end having different cross sectional areas and face-contacts to the valve hole, and wherein the upper end of the plunger may be slidably engaged to the upper portion of the valve hole. | 05-01-2014 |
20150059884 | Relief Valve With Directable Outlet - A relief valve including a body defining an inlet. A valve closure element is disposed at least partially within the body and arranged to allow selective flow through the relief valve in response to a predetermined pressure. An outlet housing that is separate from and coupled to the inlet housing is rotatable with respect to the inlet housing. The outlet housing defines an outlet that is in selective communication with the inlet. | 03-05-2015 |
20150107701 | Regulator valve - A regulator valve contain: a housing, a left end cap, a right end cap, and a valve core assembly. The housing includes a left cavity, a right cavity, a valve hole, a left opening, and a right opening. The right cavity has an inlet, the valve hole has an outlet, and between the right cavity and the valve hole is defined a seat portion, the seat portion has an inwardly conical fence, a diameter of which decreases from the right cavity to the valve hole. The left end cap is connected with and closes the left opening The right end cap is coupled with and closes the right opening The valve core assembly is inserted through the valve hole and includes a piston portion and a closing portion. | 04-23-2015 |
20150129057 | STATIC BACK PRESSURE REGULATOR - The invention generally provides a static back pressure regulator. In exemplary embodiments, the static back pressure regulator includes a seat that defines part of a fluid pathway, a poppet, a spring arranged to bias the poppet toward the seat to restrict fluid flow through the fluid pathway, and a calibration element configured to adjust a force applied to the poppet by the spring. The calibration element can include a through hole that forms part of the fluid pathway. The poppet can include a first guiding portion that extends into the through hole of the calibration element and inhibits tipping of the poppet relative to the seat. | 05-14-2015 |
20150308222 | SELF-REGULATING FLOW CONTROL DEVICE - A self-regulating flow control device for controlling the flow of injected fluid into a subsea well or flowline via a tree, manifold, or other access point on the subsea infrastructure by responding to the injection pressure being applied to prevent the conduit from collapsing. An embodiment of the self-regulating flow control device includes a housing having a first and second through bore, a piston moveable in the through bore, and a biasing member. When in an unactuated position, the biasing member biases the piston isolating the first through bore from the second through bore, and when in an actuated position, a pressure overcomes the biasing member to move the piston and expose the first through bore to the second through bore. The self-regulating control flow device prevents a vacuum from being drawn into the conduit system below during sudden decreases in uphole pressure by blocking or closing flow paths in the housing. | 10-29-2015 |
20160109889 | PROPORTIONAL PRESSURE-REGULATING VALVE - The invention relates to a proportional pressure-regulating valve ( | 04-21-2016 |