Abstract: The present disclosure relates to a double sealing check valve for a rice cooker, and more particularly, to a double sealing check valve for a rice cooker that prevents water vapor mixed with rice water and grain dregs from entering the check valve and maintains airtightness during cooking in an automatic water supply type pressure cooker that automatically supplies water and performs pressure cooking.

Abstract: An improved unloader valve assembly for a high-speed reciprocating compressor includes improved poppets and valve seat designs. The improved poppets and valve seats are useful for reducing or eliminating poppet leakage and high impact stresses on the sealing surfaces of the poppets, and are especially intended for use with high-speed reciprocating compressors operating at 1000 rpm and higher. A control chamber spacer plate for creating a control pressure chamber within the unloader valve assembly, and a valve seat cushioning plate for reducing stress on the head ends of the poppets are also described.

Abstract: A valve system of a vehicle fuel pump includes: a reservoir cup disposed within a fuel tank storing fuel in the reservoir cup; a fuel pump configured to pump fuel from the reservoir cup to the engine while supplying fuel to a jet pump through a first discharge port; a jet pump configured to charge the reservoir cup with fuel by drawing fuel from the fuel tank by using a pressure of fuel supplied by the fuel pump; and a jet pump control valve disposed on the first discharge port and configured to control a flow of fuel discharged from the fuel pump to the jet pump.

Abstract: A pressure reducing valve includes: a body, a valve seat, and a valve element opening and closing the valve seat according to a difference between a pressure on the inlet side and a pressure on the outlet side. A pressure chamber, which is a space part between the valve element and the valve seat, is provided on the inlet side of the valve element. The valve element includes a plurality of horizontal holes each opening to the pressure chamber, and a vertical hole bringing the horizontal holes and the outlet side of the valve element into communication with each other. The horizontal holes and the vertical hole are provided in such a manner that a value of a ratio of a flow channel area of the vertical hole to a total area that is a total of flow channel areas of the horizontal holes exceeds 1.16.

Abstract: Example aspects of a sliding disc assembly for a dual spring valve, and a method of operating a dual spring valve are disclosed. The sliding disc assembly can comprise a shaft defining a first end and a second end; a disc mounted on the shaft between the first end and the second end, the disc defining an upper disc surface, a lower disc surface, and an annular base surface; a first spring mounted on the shaft between the lower disc surface and the first end of the shaft; and a second spring mounted on the shaft between the upper disc surface and the second end of the shaft, wherein the first spring defines a spring force that is different from a spring force of the second spring.

Abstract: A system for supplying lubricant to a component of a gas turbine engine is provided. The system includes a first fluid circuit having a first pump drivably couplable to a fan shaft of the engine for pumping a lubricant from a lubricant tank to the component. The first fluid circuit allows only a unidirectional flow of the lubricant from the lubricant tank to the component via the first pump. The system also includes a second fluid circuit having a second pump drivably couplable to the fan shaft for pumping the lubricant from the component to the lubricant tank. The second fluid circuit allows only a unidirectional flow of the lubricant from the component to the lubricant tank via the second pump. First and second ports of the two pumps operate as input ports or output ports depending on the rotation direction of the fan shaft.

Abstract: A relief valve includes: a housing; a plunger movable to each of a closed position and an open position; a differential pressure chamber; a spring member; a piston; and a damping chamber. The plunger includes a first damping passage penetrating the plunger and bringing an area outside the plunger and a through passage into communication. The piston includes a second damping passage penetrating the piston and bringing an area inside the piston and the damping chamber into communication. A communication space connected to each of the first damping passage and the second damping passage is formed between the plunger and the piston.

Abstract: An O-ring membrane valve, including an O-ring, and a resealable membrane connected to the O-ring, the resealable membrane including a first surface, a second surface, and a slit extending from the first surface to the second surface. The O-ring membrane valve may be assembled with a fluid connector, the fluid connector including a body, having a first through-bore and a first groove arranged circumferentially within the first through-bore.

Abstract: An inner subassembly for assembling a valve assembly includes a spool defining a central bore that extends axially through the spool forming a spool annular wall, and including a spool cone tip that is disposed at the first axial end, as well as a hydraulic activation ridge extending radially outwardly from the spool annular wall, and that is disposed axially between the second axial end and the first axial end. The spool may further define a first bypass bore. A stem defines a first flow bore that aligns with the first bypass bore.

Abstract: A pressure relief valve for a reservoir has a main body with a central chamber defining an outer radial seat, a positive-pressure port with an inner radial seat, and a negative-pressure port comprising an internal passage spanning the outer seat. The sealing disk has an anchor body retained in the central chamber and a flexible diaphragm biased against the outer seat. An axial passage in the anchor body couples the central chamber to ambient atmospheric pressure. The sealing ball is biased against the inner seat. When a pressure inside the reservoir exceeds ambient by a positive-pressure threshold, then the sealing ball lifts off the inner radial seat to exhaust a gas through the positive-pressure port. When the pressure inside the reservoir is below ambient by a negative-pressure threshold, then the diaphragm is lifted off the outer seat to intake atmospheric gas into the reservoir.

Abstract: A relief valve that includes a tube; a valve configured to slide along an inner wall of the tube in an axial direction, and a spring that urges the valve, wherein the valve has a hydraulic pressure receiving surface on a first axial side that is one side in the axial direction, and a spring abutment against which the spring abuts, on a second axial side opposite to the first axial side, and the tube has a discharge oil passage having an opening in the inner wall and extending through the inner wall in a radial direction.

Abstract: Methods and systems are provided for a zero hysteresis valve. In one example, a valve comprises protrusions shaped to maintain a distance between a moveable portion of the valve and a valve seat.

Abstract: The invention relates to a device (1) for damping pressure pulsations for a compressor of a gaseous fluid, in particular of a refrigerant. The device comprises a housing (2), a piston element (6) as well as a spring element (8). The housing (2) is developed encompassing a chamber (3), with an inlet opening (4) and an outlet opening (5). The piston element (6), supported such that it is stayed across the spring element (8) on the housing (2), is disposed within the chamber (3) dividing the chamber (3) into a first chamber volume (3a) and a second chamber volume (3b), as well as being disposed movably in a direction of motion (11) between a first end position and a second end position. The motion of the piston element (6) effects a change of the chamber volumes (3a, 3b) and of a flow cross section of the outlet opening (5). The piston element (6) is developed as a hollow cylinder with two, at least partially closed, end faces (7, 13).

Abstract: A valve member includes a specific range in which an overlap area that is an area in which a hole opening and a slide outer wall are overlapped with each other becomes gradually smaller and a minimum passage area that is a passage area between an intermediate chamber and a first hole being minimum becomes gradually larger as the valve member is moved in a direction away from a valve seat portion in a movable range in the axial direction.

Abstract: A fuel pressure regulator includes a housing having a housing bore and a housing inlet; a piston located within the housing bore such that the piston and the housing bore define an accumulation chamber and such that the piston moves between a first piston position where the accumulation chamber is minimized in volume and a second piston position where the accumulation chamber is maximized in volume, the piston having a piston bore with a piston inlet and a piston outlet and a valve seat defined therebetween; a piston spring which biases the piston toward the first piston position; a valve closure which moves between a seated position which prevents fluid communication from the piston inlet to the piston outlet and an unseated position which provides fluid communication from the piston inlet to the piston outlet; and a valve closure spring which biases the valve closure toward the seated position.

Abstract: A flowrate control device for a fluid, includes a cartridge body defining a path for the fluid and having an upstream portion for the entry of the fluid, and a downstream portion provided with an outlet opening for the fluid. A shutter element is arranged in the cartridge body for sliding movement between an upstream end of the cartridge body corresponding to a minimum throttling position for the fluid and a downstream end of the cartridge body corresponding to a maximum throttling position for the fluid. The shutter element is provided with a throttling wall arranged downstream for throttling the outlet opening in a controlled manner and an upstream wall cooperating with the upstream portion of the cartridge body for bounding an inlet section for the fluid. A counter spring element exerts a contrasting force on the shutter element suitable for displacing the shutter element towards the upstream end.

Abstract: A relief valve includes a housing including an internal flow passage through which a working fluid flows, and a relief port discharging the working fluid from the internal flow passage, and a valve body including a first pressure-receiving portion a second pressure-receiving portion receiving pressure with a pressure-receiving area that is larger than a pressure-receiving area of the first pressure-receiving portion, and a first recessed portion formed at the second pressure-receiving portion at an opposite side relative to a pressure-receiving surface of the second pressure-receiving portion and including a closed-end cylindrical shape. The relief valve includes a biasing force adjustment mechanism including a spring of which one end is held at the first recessed portion, a support portion retaining the other end of the spring and including a closed-end cylindrical shape, and a motor adjusting a rotational angle and causing the support portion to reciprocate.

Abstract: A throttling device is equipped with a valve seat in which a valve port for connecting a primary chamber and a secondary chamber is formed, a needle valve, a needle section which is inserted into the valve port, a guide section for guiding a slide shaft of the needle valve, and a coil spring for biasing the needle valve in a valve-closing direction. The guide section and the coil spring are positioned on the primary chamber side. The position of the needle valve in the valve-closing direction is restricted by a stopper section in a manner such that the minimum gap between the needle valve and the valve port is maintained. Furthermore, the needle valve is not seated on the valve seat.

Abstract: A temperature control system employing a two-phase refrigerant and a compressor/condenser loop is disclosed wherein a two phase refrigerant condenses within the load, the system including a thermo-expansion valve that simultaneously allows refrigerant flow through the thermo-expansion valve and regulates a temperature of the refrigerant in its two phase state ahead of the thermo-expansion valve, and wherein a flow through the thermo-expansion valve occurs only after a pressure and temperature upstream of the thermo-expansion valve reaches a final temperature and pressure.

Abstract: A valve device includes a body, a solenoid valve accommodated in an accommodation hole of the body, and a joint member fixed to the body. The solenoid valve includes: a sleeve having a tubular shape and fitted in the accommodation hole, and including an introduction passage and a delivery passage; and a valve element configured to open and close the passages. A U-seal is disposed between an outer wall surface of the sleeve and an inner wall surface of the accommodation hole. The body has an attachment hole that is located downstream of the delivery passage of the sleeve and opens on an outer surface of the body. The joint member including a backflow reduction valve is fixed to the attachment hole.

Abstract: A shock absorber has a valve controlling the flow rate of fluid between a first chamber and a second chamber. The shock absorber may include a blocker that has a variable profile. The blocker may be rotatable using an external adjuster to position the blocker to variably occlude an aperture and vary the damping of the suspension. A bias may also be positioned adjacent the blocker to allow force from the fluid to move the blocker and expose the aperture, thereby allowing fluid to flow through the entirety of the aperture.

Abstract: A damping unit, such as a shock absorber, includes a cylinder (2), a piston (4) dividing the cylinder into a compression chamber 6 and a rebound chamber (8), and a piston rod (10). The rod extends from the piston through at least the rebound chamber. The compression chamber reduces in volume and the rebound chamber increases in volume as the damping unit contracts generating a compression flow across the piston, and the rebound chamber reduces in volume and the compression chamber increases in volume as the damping unit extends, generating a rebound flow across the piston. The piston has a compression chamber piston face and an annular rebound chamber piston face. At least one rebound restriction is provided in or on the piston, such as one or more rebound ports (26)/passages/valving (28), and at least one compression restriction, such as one or more compression ports 14/passages/valving (20) is provided in or on the piston.

Abstract: A switching oil gallery de-aeration arrangement for a switchable valve arrangement is provided, including a switching control valve that activates or deactivates the switchable valve arrangement. The switching control valve is movable from a first position, in which pressurized hydraulic fluid from a hydraulic lash adjuster fluid gallery flows to a passage on the hydraulic lash adjuster and through a switching hydraulic fluid gallery to a check valve such that pressurized hydraulic fluid from the hydraulic lash adjuster fluid gallery pressurizes the switching hydraulic fluid gallery and is released through the check valve, and a second position, in which pressurized hydraulic fluid having a higher pressure sufficient for carrying out a switching function of the switchable valve arrangement is delivered by the switching hydraulic fluid gallery via the second intersection to the second port.

Abstract: In one featured embodiment, a closure sleeve for a valve comprises a sleeve body surrounding a center axis and defined by an overall length extending from an upstream end to a downstream end. The sleeve body has an internal cavity that is enclosed at the downstream end and is open at the upstream end. The internal cavity is defined in part by a piston contact surface that is defined by an inner diameter. The piston contact surface is configured to slide against a piston to be received within the internal cavity, and a ratio of the inner diameter to the overall length is between 1.0 and 1.5.

Abstract: A valve for a brake cooling system may include a body including a first and a second end, a first at least one radial passage, and a second at least one radial passage fluidly communicable with the first end. A first seat may be disposed within the body proximate the first end, while a plug may include a stop, a collar, and a first trunk disposed between the stop and the collar. The collar and the first trunk may be disposed in the body while an adapter may include a second seat, a head, and a second trunk disposed between the second seat and the head. The second seat and the second trunk may be disposed in the plug with a chamber, fluidly communicable with the adapter and the first at least one radial passage, being defined in the first trunk of the plug. An actuator may be slidably disposed in the chamber, and be in operative association with a biasing member. A poppet may be in operative association with the biasing member and the first seat.

Abstract: A pumping assembly is provided which is suitable for use in a variety of dosing pumps. The pumping assembly comprises a pump body with a pump bore, and a sleeve fixed within the pump bore. The sleeve has a first end, a second end and a sleeve bore. A plunger is adapted to enter the first end of the sleeve and to reciprocate within the sleeve bore. The sleeve has at least one port to allow fluid flow through a wall of the sleeve. The, or each, port is elongated in a direction substantially orthogonal to a direction of reciprocation.

Abstract: A system and method for a check valve system is provided including a plurality of interlocking guide plates that are inserted into a guide plate retainer in order to maintain their relative position to one another. A retainer nut is positioned to structurally engage the guide plates. An insert adapter receives a check valve to open and close the valve. A threaded screw engages both the check valve and the retainer nut to form the check valve system. A valve spring is positioned between the guide plate retainer and the insert adapter to bias the check valve into a closed position and to maintain a closed position as desired. The check valve system provides a low mass solution the reduces initial pressure overshoot and instability oscillations as well as providing a good flow path for fluid and high capability for back pressure.

Abstract: An oil pump includes a pump housing comprising an oil input port formed at one side of the pump housing. An oil output port is formed at another side of the pump housing. An oil flow unit is provided at a center of the pump housing, and the oil flow unit compresses and discharges oil input from the oil input port toward the oil output port. A bypass passage circulates the oil from the oil output port to the oil input port. A pressure control chamber allows the oil to flow through the oil output port and the bypass passage. The pressure control chamber has a plunger that is supported by an elastic body and moves in accordance with oil pressure. A bypass hole is formed at one side of the pressure control chamber and allows the oil passing through the oil output port to flow to the bypass passage when the plunger moves due to the oil pressure. The amount of oil flow increases depending on a movement distance of the plunger.

Abstract: A pressure regulator valve has a housing that defines a fluid passage and a flat seat disposed around an opening of the fluid passage and exit ports. A pin with a raised conforming elastomeric embossment that contacts the seat when the valve is closed is axially disposed in the housing. The pin is biased to maintain the elastomeric embossment in contact with the seat to maintain the valve closed and control an opening pressure of the valve. Flow of fluid through and out of the pressure regulator valve housing is controlled through adjustment of a level of this biasing. The fluid flows across the flat seat and between the flat seat and the embossment when the valve is open in such a manner that the flow is generally laminar and such that the valve minimizes pressure gain at the onset of flow.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The disclosure generally relates to unclamp sensing feedback devices for clamping or holding devices in automatic production lines more specifically to a link clamp assembly. Further, the disclosure also provides the method of achieving feedback to sense fully unclamped condition of the link clamp cylinder.

Abstract: A full flow pressure relief valve includes a housing having an inlet opening on its bottom and an outlet opening on one of its side. A piston is positioned inside the housing adapted to move from a set position where the piston seals the inlet opening to a sprung position where the piston is removed from the inlet opening. A lock is biased by a spring in a perpendicular direction toward the side of the piston. The lock is adapted to hold the piston in the set position until a relief pressure is supplied in the inlet opening, where the lock is adapted to release the piston to the sprung position.

Abstract: A system for providing pressurized hydraulic fluid includes a pump. A bypass valve assembly includes an inlet port in communication with the pump and an outlet port in communication with an accumulator. The pump and the accumulator are both in communication with a hydraulic control system that controls, lubricates, and cools a transmission of a motor vehicle. The bypass valve assembly has a valve moveable between at least a two positions. The bypass valve assembly is operable to bypass the accumulator when the vehicle is first started such that the pump charges the hydraulic control system before charging the accumulator. The accumulator provides pressurized hydraulic fluid to the hydraulic control system after vehicle start.

Abstract: The invention relates to the simple and safe construction of a high-pressure connection (1) for transferring gaseous and/or liquid media, in particular for the refuelling of vehicles with hydrogen. According to the invention, the high-pressure connection (1) comprises a housing (2) with a media passage (P) and a leaktight piston (3) of which the front end is disposed in a sealing manner with respect to an annular seal. The seal (4) has a seal support (4a) in which is inserted a sealing insert (4b), the sealing support (4a) consisting of a harder plastics and the sealing insert (4b) consisting of a softer plastics.

Abstract: A rotary vane pump includes a housing that encloses an air chamber. An intake aperture extends to the air chamber. A check valve couples with the intake aperture and includes a stop having first and second sides. A helical spring engages the first side and biases the second side against a valve seat. A porous body is disposed between the helical spring and the air chamber for preventing fluid backflow.

Abstract: A piston has a closure face closing off a cavity defined radially inwardly and downstream of an upstream end. The closure face is spaced from the upstream end by a first distance. The piston has a cavity extending in a downstream direction away from an opposed side of the closure face to a second end. A piston diameter is defined to an outer periphery of a cylindrical portion forming a seal face. A ratio of the piston diameter to the first distance is between 3.05 and 6.31. A valve sleeve has windows formed to allow flow of fluid from a sleeve internal bore through the windows and to a downstream port. A ratio of the inner diameter to the axial dimension of the windows is between 0.91 and 1.02. A ratio of the inner diameter to a circumferential dimension of the windows is between 1.55 and 1.85.

Abstract: A valve assembly for a fuel injector that includes a sleeve member having an interior chamber, a piston member supported for movement within the interior chamber of the sleeve member and separating an upstream pressure side of the valve assembly from a downstream pressure side of the valve assembly, and a dynamic sealing device mounted to one of the sleeve member and the piston member for sealingly isolating the upstream pressure side of the valve assembly from the downstream pressure side of the valve assembly. The dynamic sealing assembly includes a PTFE seal member having a generally C-shaped cross-section defining an internal cavity having an opening about the outer periphery thereof the seal member, and a helical spring disposed within the internal cavity of the seal member for providing a constant sealing force to the seal member.

Abstract: An oil pump system can include a housing defining a pocket for an oil pump, a cavity, and a pump outlet passage connecting the pocket to the cavity. Low and high pressure relief passages can be defined by the housing for selectively fluidly coupling the cavity to a pressure relief area. A pressure relief valve positioned in the cavity can comprise first and second ends, first and second internal bores, and a slot in communication with the first internal bore. A biasing member positioned in the second internal bore can biasing the valve to a first position. The valve can translate to a second position aligning the slot with the low pressure relief passage to selectively provide low pressure relief to the oil pump, and can translate to a third position aligning the slot with the high pressure relief passage to selectively provide high pressure relief to the oil pump.

Abstract: An air compressor includes a cylinder housing, an outlet receptacle disposed on the cylinder housing, and a partition formed between the cylinder housing and the outlet receptacle and having an air passage formed in the partition, a piston slidably received in the cylinder housing and coupled to a motor for moving relative to the cylinder housing in a reciprocating action in order to generate a pressurized air, and a spring-biased check valve engaged with the partition for selectively blocking the air passage of the partition, the outlet receptacle includes an inner diameter “D2” no less than an inner diameter “D1” of the cylinder housing for allowing the pressurized air to easily flow into the outlet receptacle and for allowing the piston to be moved in a greater moving speed.

Abstract: A system, method and apparatus for enabling the release of pressure in a supply line including an electronic control member for controlling and enabling the release of pressure in the supply line at a desired pressure whether or not power is maintained to the electronic control member.

Abstract: 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.

Abstract: A check valve includes a valve seat and a compliant member that moves to seal the check valve by contacting the valve seat. A method for priming a chromatography solvent pump includes providing the check valve in fluid communication with an outlet of the pump, drawing fluid into the pump from a fluid source, and expelling the fluid from the pump through the valve, thus wetting the check valve. Another method for priming a chromatography solvent pump includes providing the check valve in fluid communication with an inlet of the pump, drawing fluid through the valve into the pump, and expelling the fluid from the pump.

Abstract: A check valve comprising a section of a drill string, a flapper valve positioned within and concentric to the section of the drill string, and a piston valve positioned within and concentric to the section of the drill string. The flapper valve allows fluid flow in a first direction through an inner portion of a cross-section of the section of the drill string and not allowing fluid flow in a second direction, and the piston check valve allowing fluid flow in the first direction through an outer portion of the cross-section of the section of the drill string and not allowing fluid flow in the second direction, where the first portion and the second portion of the cross-section of the section of the drill string are mutually exclusive.

Abstract: A relief valve for an oil pump can prevent a main gallery from being damaged by largely decreasing peak pressure of an oil pump by using bypass flow according to oil pressure of the main gallery in cold start of an engine, and can control the discharging pressure of the oil pump at the optimum level when the engine is warmed up, by defining a housing chamber communicating with the main gallery of the engine and a plunger chamber bypassing some of oil flowing to the main gallery to the oil pump or an oil pan in accordance with oil pressure in the housing chamber using a plunger chamber, and by changing a modulus of elasticity of a coil spring elastically supporting the plunger in accordance with the oil pressure produced in the main gallery, by using a substance that is expanded by temperature.

Abstract: The present invention regards a device designed for injection of fluids in a well bore, typically an offshore well bore for petroleum production and gas injection/gas lift system for fluid injection. The device comprises a outer hollow housing (1) with an internal body (2) moveable within the outer housing (1) with an internal bore (3) which in a first closed position is closed with a metal to metal seal system between the outer housing (1) and the internal body (2), which internal body (2) is operated by pressure differential across the internal body (2), where the internal body (2) is designed with slots (4) forming outlets of the internal bore (3) which in an open position of the device is positioned outside of the outer housing (1).

Abstract: It is addressed to provide a hydraulic control valve for preventing high-speed rotation of a valve body of a check valve incorporated in the hydraulic control valve of a type that pressure oil is supplied from a tandem, path and a parallel path via the check valve. A check valve unit is constituted by a main unit and a valve body of a first check valve. A throttle is provided on a right side of an O-ring groove. On a main unit side, there is formed a cylindrical housing portion in which a threaded portion is formed on an outer peripheral portion for fixation to a casing of the hydraulic control valve. On an inner peripheral surface of the housing portion, a groove is formed in an axial direction. Meanwhile, the valve body of the first check valve has a rib. At a time of assembly, the rib, is inserted into the groove of the main unit as indicated by an arrow.