Abstract: A check valve includes a housing defining a pair of valve openings, a pair of flappers pivotably mounted to a pin and such that they are configured to rotate relative to the housing between an open position in which they permit fluid flow through the valve openings and a closed position in which they prevent fluid flow through the valve openings, and an element configured to stop and hold the flappers in the open position. A cavity is formed between the pair of flappers and stop element when the flappers are in the open position. Each of the flappers comprise one or more contact surfaces configured to contact the stop element when in the open position. The stop element has stop surfaces with stationary contact areas configured to oppose and abut the flapper contact surfaces when the flappers are in the open position.

Abstract: A frac system including a frac tree. The frac tree includes a frac head. The frac head defines a first inlet, a second inlet, and an outlet. The frac head receives frac fluid through the first inlet and directs the frac fluid to the outlet fluidly coupled to a wellhead. A valve couples to the second inlet of the frac head. A flapper valve is within the frac head. The flapper valve moves between an open position and a closed position to control fluid flow to the valve through the second inlet. The flapper valve aligns with a first axis of the outlet and the second inlet in the closed position and aligns with a second axis of the first inlet in the open position.

Abstract: A continuous high-power turbine fracturing equipment may include a lubrication system, which may include a first lubrication unit configured to lubricate a plunger pump. The first lubrication unit may further include a high pressure lubrication unit. The high pressure lubrication unit may include a high pressure motor, a high pressure pump, and a high pressure oil line. The high pressure motor may be configured to drive the high pressure pump, which may be configured to pump high pressure lubricating oil into the high pressure oil line. The high pressure oil line may be configured to lubricate at least one of connecting rod bearing bushes or crosshead bearing bushes in the plunger pump.

Abstract: A check valve assembly for a supply pipe. The check valve assembly includes a hinge pin, a first flapper, and a second flapper. The first flapper is pivotally coupled to the second flapper with the hinge pin. The check valve assembly also includes a stopper located between the first flapper and the second flapper. The stopper is configured to limit movement of the first flapper and the second flapper. The check valve assembly further includes a plate assembly located downstream of the stopper. The plate assembly is configured to break vortices formed in a fluid flow across the first flapper and the second flapper.

Abstract: A valve assembly having a body forming a bucket having a sidewall extending between an open end and a closed end along a bucket axis. A first conduit and a second conduit extend from the sidewall, wherein the first and the second conduits extend along a conduit axis that is perpendicular to the bucket axis. A frame inserts into the bucket along the bucket axis and includes a valve seat and a valve member biased against the valve seat. A guide is provided in the bucket between the closed end and the frame and extends along a guide axis between a first opening arranged in a first plane and aligned to receive fluid flow from the first conduit and a second opening arranged in a second plane and aligned to direct fluid flow through the valve seat. The first and second planes are not parallel to one another.

Abstract: A system for a packer in a well includes a completion string, having production tubing, disposed within the well. The packer is connected to the production tubing and the production tubing defines an annulus in the well. A full-bore iris isolation valve is installed on the production tubing and located downhole from the packer. The full-bore iris isolation valve has an open position, a closed position, and a plurality of blades. The closed position isolates the annulus from an inner orifice of the production tubing to set the packer in the well. An activation mechanism, disposed adjacent to and up hole from the full-bore iris isolation valve, is configured to interact with the plurality of blades to place the full-bore iris isolation valve in the open position and the closed position. A sliding sleeve, having an inner profile, is connected to and located up hole from the activation mechanism.

Abstract: A check valve for a backflow prevention assembly includes a linkage with a platform having a proximal end and a distal end and a first coupling member supported by the platform for engaging a bias assembly. A stop protrudes from the proximal end of the platform to engage a frame of the check valve for limiting travel of the platform. A branch depends from the proximal end of the platform, the branch having a hinge pin configured to nest in a slot defined by check valve. A second coupling member depends from the distal end of the platform for engaging a valve member.

Abstract: The invention relates to a mechanical prosthetic heart valve (10) comprising an annular support (12) having an internal peripheral wall (14) centered about a longitudinal axis (X) and delimiting an internal passage, and at least two mobile leaflets (40), preferably three leaflets (40), arranged in such a way as to each be able to effect a rotational movement about an axis of rotation perpendicular to said longitudinal axis (X) so that the valve (10) can pass from a closed configuration to an open configuration and vice versa. Each leaflet comprises a central part (46), and two lateral winglets (48a, 48b) flanking the central part (46) symmetrically with respect to a plane of symmetry (Z) of the leaflet. Each winglet (48a, 48b) comprises one of two terminal portions (49a, 49b).

Abstract: A check valve includes a housing defining an inlet, an outlet, a passage between the inlet and outlet, and a sealing surface along the passage. A piston member is disposed about a longitudinal axis and has a sealing face disposed perpendicular to the longitudinal axis and a circular groove defined therein extending inward from the sealing face. An O-ring is disposed in the groove. A biasing member exerts a biasing force on the piston and thus forces the O-ring into sealing engagement with the sealing surface of the housing. The piston member is moveable from a first position in which the O-ring is sealingly engaged with the sealing surface of the housing and thus the outlet is sealed from the inlet, and a second position in which the O-ring is spaced from the sealing surface of the housing and thus the outlet is not sealed from the inlet.

Abstract: A frac system including a frac tree. The frac tree includes a frac head. The frac head defines a first inlet, a second inlet, and an outlet. The frac head receives frac fluid through the first inlet and directs the frac fluid to the outlet fluidly coupled to a wellhead. A valve couples to the second inlet of the frac head. A flapper valve is within the frac head. The flapper valve moves between an open position and a closed position to control fluid flow to the valve through the second inlet. The flapper valve aligns with a first axis of the outlet and the second inlet in the closed position and aligns with a second axis of the first inlet in the open position.

Abstract: Apparatus and method for ventilating a building structure, such as a residence. In some embodiments, a ventilation system includes a damper assembly which extends through an interior substrate (e.g., an interior wall) of the structure and an exhaust assembly which extends through an exterior substrate (e.g., an exterior wall of the structure and which is in communication with the damper assembly via a control circuit. The interior wall separates a conditioned space and an unconditioned space. The exhaust assembly is initially activated to vent exhaust air from the unconditioned space while a door of the damper assembly remains closed. The door is subsequently opened responsive to a measured environmental parameter, such as a differential pressure between the conditioned and unconditioned spaces, to generate a combined airflow that passes from the conditioned space to the unconditioned space and then to the exterior of the structure.

Abstract: A structural body includes a refrigerant between a first plate and a second plate. A circulation structural part between the first and second plates includes a reservoir portion provided on a first plate side. In the circulation structural part, the refrigerant from the reservoir portion which has evaporated due to heat of the first plate side reaches a second plate side, condenses on the second plate side and is returned to the reservoir portion again. A temperature sensitive mechanism is in a first state when a temperature of the first plate side is equal to or higher than a predetermined temperature to allow refrigerant circulation, and is in a second state different from the first state when the temperature is lower than the predetermined temperature to prohibit the refrigerant circulation.

Abstract: A throttle valve for a centrifugal compressor includes a body having a central passage and one or more diverter flow paths. The central passage is formed by an inner surface of the body, each diverter flow path has an inlet and an outlet, and the one or more diverter flow paths are configured to induce a swirl within a fluid flow through the central passage while a portion of the fluid flow passes through the one or more diverter flow paths. The throttle valve also includes at least one blade disposed within the central passage. The at least one blade is configured to direct the portion of the fluid flow to the inlets of the one or more diverter flow paths while the at least one blade is in a partially open position.

Abstract: A valve assembly includes a valve body that defines an internal flow passageway between an inlet and an outlet, and a valve seat disposed in the valve body with a sealing surface perpendicular to the flow passageway. The valve assembly further includes a clapper pivotally correlated to the valve seat having a closed configuration extending across the valve seat configured to substantially close off the flow passageway, and an open configuration configured to substantially allow fluid flow in the flow passageway from the inlet to the outlet through the valve body. An annular valve seat seal is disposed within an annular groove formed in a surface of the valve seat, where the annular valve seat seal is disposed at an interface between the valve seat and the clapper when the clapper is in the closed configuration.

Abstract: A valve assembly includes a valve body having a seat-retainer chamber with a floating seat ring disposed adjacent an inner sidewall of the seat-retainer chamber. The floating seat ring is configured to contact a first portion of a plug head at a single annular location prior to a second portion of the plug head contacting a valve primary seat during a closing stroke of the plug head. A static seal is located radially between the floating seat ring and the inner sidewall of the seat-retainer chamber.

Abstract: A pressure regulator including: a housing including an inlet flow passage and an outlet flow passage; a plunger reciprocally mounted in the housing and including a plunger flow passage; an inlet to the plunger flow passage, wherein the inlet is aligned with a plane oblique to an axis of the plunger flow passage; and a valve seat fixed to the housing and positioned between the inlet flow passage and the inlet to the flow passage of the plunger, wherein the valve seat is configured to receive and abut the inlet to the flow passage of the plunger.

Abstract: A check valve for a pump delivery port includes a body having inlet and outlet portions joined by a duct and an opening; a curve having an inlet end to be connected to the delivery port and an outlet end to be connected to the body; and a valve member having a disk-shaped locking portion sealingly interacting with an edge of the curve and a locking portion secured in a seat by a lid of the opening. The valve member moves between open and closed positions and has a metal core made while the locking portion is metal-free. The lid cooperates with the locking portion through a protrusion or a cavity and pushes the valve member toward the curve to the closed position and allows the valve member to deflect to the open position under pressure of a working fluid in equilibrium with the weight of the blocking portion.

Abstract: A check valve has a valve housing defining a first valve opening and a second valve opening. A first flapper is pivotably mounted around a first axis for rotation relative to the housing between an open position at which it permits fluid flow through the first valve opening and a closed position at which it prevents fluid flow through the first valve opening. A second flapper is pivotably mounted around a second axis for rotation relative to the housing between an open position at which it permits fluid flow through the second valve opening and a closed position at which it prevents fluid flow through the second valve opening. The first axis is spaced laterally from the second axis. A method is also disclosed.

Abstract: A contoured biological tissue for a bioprostheses, such as a cardiac/vascular patch or a bioprosthetic heart valve, and methods of contouring the tissue, are described. A predetermined pattern is provided on the tissue, comprising a plurality of ridges or depressions that are configured to facilitate cellular migration in a first direction and discourage cellular migration in a second direction. The biological tissue can be used in connection with a bioprosthetic heart valve comprising a biological tissue leaflet structure coupled to a supporting frame.

Abstract: A wastegate is attached to a turbine housing of a turbocharger. The wastegate opens and closes a bypass passage. An actuator is coupled to the wastegate via a link mechanism. The link mechanism includes a link rod and a link arm. The longitudinal direction of the link rod in a state in which the bypass passage is fully closed is defined as a width direction of the link arm. The coupling center position in the link arm to which the link rod is coupled is located at a position offset in a direction in which the link rod moves to open the wastegate from a middle of the link arm in the width direction.

Abstract: An actuation system to control flow of a fluid includes a body including an axial cavity and a valve in fluid communication with the axial cavity, the valve including a closing member moveable into and out of a closed position against the valve seat, and a resistance member. Fluid from the axial cavity can flow through and out of the valve when the closing member is out of the closed position and the closing member is biased into or out of the closed position by a force applied by the resistance member. The closing member is movable out of or into the closed position upon a rotational speed and fluid pressure within the axial cavity being sufficient to overcome the force applied by the resistance member.

Abstract: A static axial seal gland (100, 100) formed in relief in a substrate (31, 52) and having an inner sidewall (32, 53), an outer sidewall (33, 54) and a floor (34, 55) extending between the inner sidewall (32, 53) and the outer sidewall, one or both of the inner sidewall (32, 53) and the outer sidewall (32, 53) being concavely-profiled in radial section along a major portion of its depth to define a projecting lip (35, 56) proximal a land of the substrate (31, 52), the gland (100, 100?) being fitted with an elastomeric O-ring (39, 59) which is located and retained by interference with the projecting lip (35, 56), either under tension on the inner sidewall (32, 53) or in compression against the outer sidewall (33, 54).

Abstract: A catheter including at least one distal opening positioned at or near the distal end and at least one proximal opening near the proximal end and proximal to the at least one distal opening is described. The catheter may be configured for delivering at least a first fluid through the at least one distal opening to a central circulation system of a patient and delivering at least a second fluid through the at least one proximal opening to a peripheral circulation system of the patient.

Abstract: An actuator mechanism for a valve system includes a housing having an outer surface, an inner surface defining an opening and a chamber extending partially about the housing between the outer surface and the inner surface. A hinge is mounted to the housing. The hinge is exposed at the chamber. A valve member is fixedly connected to the hinge. The valve member is selectively positionable across the opening. An actuator is arranged in the chamber and selectively biased against the hinge to transition the valve member between an open configuration and a closed configuration.

Abstract: A link couples a support body and a valve body in a first arrangement where a first link-forming member is rotationally movably supported by the support body and in which a second link-forming member is rotationally movably supported by the valve body. The link includes: a link length that is a length of the first link-forming member, as measured between a rotation axis with respect to the support body and a rotation axis with respect to the second link-forming member; and a link length that is a length of the second link-forming member, as measured between a rotation axis with respect to the valve body and a rotation axis with respect to the first link-forming member. The link lengths differ from each other. The link is also configured to enable coupling between the support body and the valve body in a second arrangement inverted with respect to the first arrangement.

Abstract: A prosthetic device for treating a mitral valve includes a prosthetic insert member insertable between leaflets of mitral valve. The insert member has an elongated cross-sectional profile for conforming to gap between leaflets of a mitral valve. The device also includes an anchoring member for attachment to heart tissue for maintaining the insert member in the mitral valve. The insert member includes a valve that permits one-way blood flow therethrough. An anchoring member secures the prosthetic insert member to a heart wall.

Abstract: An air admittance valve preventing mephitis overflow, having a main body with an air entry guide base defining an air entry guide; a pivot support; and a valve seat. A sealing valve group having a sealing valve body that defines a recess; a flexible member; a pivot housing; and a pivot. The valve seat is located about the air entry guide. The pivot is located in the pivot housing and the pivot support, and the pivot is located along, or adjacent to, the center of gravity of the sealing valve body. The flexible member is at least partially located in the recess and abuts the main body; and when the air admittance valve is closed, the sealing valve body abuts the valve seat.

Abstract: A spring return check valve that has a body forming a fluid flow path therethrough, a cover that closes an opening in the body and including a cavity therein facing the fluid flow path, a disc that rotates from a first position closing the fluid flow path and a second position fully opening the fluid flow path and a spring connected between the cover and the disc and including extensions integrally extending from each end of the spring to cause the spring to buckle into the cavity when the disc rotates to the second position.

Abstract: A voice prosthesis for mounting in a fistula between trachea and esophagus is provided. The voice prosthesis comprises a tubular body having a lumen, a valve disc and a valve seat. The valve disc and a valve seat are arranged in the lumen of the tubular body, such that the valve disc and the valve seat control the connection through the lumen by interaction between the valve disc and the valve seat. A sealing rim is arranged between the valve disc and the valve seat, such that the interaction between the valve disc and the valve seat is obtained via the rim. A method for manufacturing a voice prosthesis is also provided.

Abstract: A valve assembly (12) includes a first housing (22), a diaphragm member (24) having a plurality of individually pivotable sealing members (50), and a second housing (26) coupled to the end of the first housing over the diaphragm member. The second housing has a plurality of ports (78) spaced about the second member. The diaphragm member is structured to actuate between (i) a first state wherein the sealing members substantially seal the end of the first housing responsive to a pressure within the first housing being below a certain level, each of the ports being open in the first state, and (ii) a second state wherein the sealing members pivot away from and do not substantially seal the end of the first housing responsive to a pressure in the first housing being at or above the certain level, each sealing member substantially sealing a respective one of the ports in the second state.

Abstract: A fuel tank check valve, which can prevent one portion of a coil portion of a torsion coil spring from being stuck on a stepped portion of a pivot includes a cylindrical member defining a flow channel for a fuel fluid; a flap axially supported on the cylindrical member through a pivot; and a torsion coil spring urging the flap in a closing direction. The pivot includes a large diameter portion around which a coil portion of the torsion coil spring is wound; and a first small diameter portion and a second small diameter portion coaxial with each other, and projecting into a shaft hole provided in either one of the cylindrical member or the flap. The first small diameter portion adjacent to the large diameter portion is off-centered to a side where the torsion coil spring presses against the pivot relative to the large diameter portion.

Abstract: A check valve comprises a valve housing defining a valve opening, a pair of mounting posts arranged on opposed sides of the valve opening and a hinge pin mounted between the mounting posts. A pair of flapper elements are pivotably mounted to the hinge pin for rotation relative to the housing between an open position in which they permit fluid flow through the valve opening and a closed position in which they prevent fluid flow through the valve opening. The valve further comprises a stop mounted between the mounting posts above the hinge pin and extending across the valve opening such that the flapper elements will contact the stop in their open positions. The stop is a coil spring.

Abstract: A system for conveying fluids at a subsea location includes a module having a flow line formed of plurality of linear sections. At least two of the sections have a geometrically parallel arrangement. The module includes an inlet supplying fluid to the flow line and an outlet receiving fluid from the flow line.

Abstract: A control system of at least one flap of a fluid duct of an intake system of an internal combustion engine, including: a swivel axis, at least one flap connected off-center to the swivel axis by which the at least one flap can be swiveled within the fluid duct between positions with different degrees of opening, a swivel lever connected to the swivel axis, the swivel lever pivoting the swivel axis, an elastic working return element connected directly or indirectly to the swivel lever and applying a force to the at least one flap to return the at least one flap toward a home position.

Abstract: The present disclosure discloses a magnetic floor drain, comprising a floor drain body and a sealing cover. A straight-through water outlet is provided at a lower part of the floor drain body. A locating surface is provided at one side of the water outlet. At least one fixed magnetic block is provided on the locating surface and all the fixed magnetic blocks are provided in an interval arrangement. One side of the sealing cover is connected flexibly to the locating surface through a hinge structure. At the same time, a movable magnetic block is provided at the hinged side of the sealing cover. Centers of the fixed magnetic block and the movable magnetic block are both located on the axis of the hinge structure. The present disclosure provides an adjustable draining which is simple and useful, convenient to assemble and few accessories needed.

Abstract: Device in the form of a combined non-return valve and rat killer for internal fitting in a sewer pipe comprising a valve (2), which can swing between an open and a closed position, the valve (2) being able to serve as a seal against possible back-flow (B) and also as a rat killer. The valve (2) is fitted with a projection (2a) on its inner side near its lower end and when swinging down, the blow-impact of the valve with the rat (12) can kill it. The valve (2) is operated by an actuator (7), preferably in the form of a voice-coil linear motor, which is controlled by sensors in the sewer pipe. Due to a continuous flow (A) through the sewer pipe, the device will remain clean and thus functional.

Abstract: The present disclosure concerns a charge cooler with an air cooler in a first air path and with a bypass in a second air path which is connected in parallel to the first air path, wherein a thermal insulation is assigned to the bypass which thermally isolates the bypass from the air cooler, wherein the air cooler has a double-walled base body with an outer wall and with an inner wall, wherein the thermal insulation is arranged on the inner wall. The present disclosure also concerns a valve for such a charge cooler, and a turbo-charged internal combustion engine with such a charge cooler, and a motor vehicle with such an internal combustion engine.

Abstract: An air register includes a body having a front plate with a front surface, a rear surface, and at least one opening extending from the front surface to the rear surface, a plurality of louver positioned rearward of the front plate and the rear surface and movable from an open position to permit air flow through the air register to a closed position to restrict air flow through the air register, and wherein each of the plurality of louvers includes at least one gasket compressible when the air register is in the closed position.

Abstract: A filler pipe is attached to a retainer that holds a fuel nozzle holder. The retainer includes: a first attaching portion attached to an inlet portion of the filler pipe; a holding portion having an engaging hole; and an opening positioned at a first end of the retainer, which is closer to a longitudinal center of the filler pipe than a second end is. The fuel nozzle holder includes: a second attaching portion and including an engaging piece that engages the engaging hole; and a main body extending from the second attaching portion toward the longitudinal center of the filler pipe. The engaging piece is surrounded at three sides by a groove having a U-shape. The engaging piece is connected to the second attaching portion on the main body-side. The holding portion extends toward the longitudinal center of the filler pipe to cover the groove.

Abstract: A method for reducing reductant deposits in an exhaust conduit fluidly coupled to an engine comprises operating the engine to produce an exhaust gas. The exhaust gas is communicated into the exhaust conduit which has an initial cross-sectional area. An initial flow rate corresponding to an initial flow velocity of the exhaust gas entering the exhaust conduit is determined. The initial flow rate and, thereby the initial flow velocity of the exhaust gas, increases or decreases based on an operating condition of the engine. The initial flow rate of the exhaust gas is compared with a predetermined threshold. If the initial flow rate of the exhaust gas is lower than the predetermined threshold, a cross-sectional area of the exhaust conduit is reduced. The reducing of the cross-sectional area causes the exhaust gas to have an adjusted flow velocity greater than the initial flow velocity.

Abstract: A method for discharging exhaust gas from a gas turbine wherein a number of sectors, position, and angle at the center of at least one sector of a peripheral opening capable of forming an area for reingestion of a primary flow into an engine bay are determined by correlation of interactions between secondary cooling flows and the primary flow, from following behavior parameters: air gyration and speed at an inlet of a pipe, geometry of an exhaust stream, routing of the secondary cooling flow for cooling the engine bay, and a geometry and position of inlets of the secondary flows. The peripheral opening is then closed over the identified at least one angular sector. The method prevents backflow of hot primary air into the peripheral opening formed between a pipe and an ejector of the exhaust stream of a gas turbine.

Abstract: Drill string check valve apparatus comprises a tubular body and a flapper valve mounted in the body with a flapper movable between an open position and a closed position. An axially extending valve retainer is also mounted in the body and is translatable from a running position to a drilling position. In the running position the valve retainer extends through the valve to maintain the flapper in the open position. In the drilling position the valve retainer permits the flapper to move to the closed position to prevent flow up through the body.

Abstract: An air admittance valve preventing mephitis overflow, having a main body with an air entry guide base defining an air entry guide; a pivot support; and a valve seat. A sealing valve group having a sealing valve body that defines a recess; a flexible member; a pivot housing; and a pivot. The valve seat is located about the air entry guide. The pivot is located in the pivot housing and the pivot support, and the pivot is located along, or adjacent to, the center of gravity of the sealing valve body. The flexible member is at least partially located in the recess and abuts the main body; and when the air admittance valve is closed, the sealing valve body abuts the valve seat.

Abstract: A gate valve for positioning in the open upper end of a grain bin below the lid thereof which closes the open upper end of the grain bin. The gate valve permits grain to pass downwardly therethrough but which prevents warm moist air from the grain bin from passing upwardly therethrough into a grain spout or deadhead box.

Abstract: A fuel pressure regulator includes a housing defining a fuel inlet and a fuel outlet; a valve seat located between the fuel inlet and the fuel outlet, the valve seat being centered about a valve seat axis; a valve member centered about a valve member axis, the valve member being moveable between 1) a closed position where the valve member engages the valve seat to prevent fuel flow from the fuel inlet to the fuel outlet and 2) an open position where the valve member is disengaged from the valve seat to permit fuel flow from the fuel inlet to the fuel outlet; and a grounding member grounded to the housing which engages the valve member to cause the valve member axis to tip relative to the valve seat axis when the valve member moves from the closed position to the open position.

Abstract: An exhaust gas heat recovery system may include a housing, a valve member, and a heat exchanger. The housing may include an inlet, an outlet, a first exhaust gas pathway in communication with the inlet and outlet, and a second exhaust gas pathway in communication with the inlet and outlet. The valve member may be disposed within the housing and may be movable between first and second positions. In the first position, the valve member may allow fluid flow through the first exhaust gas pathway and substantially prevent fluid flow through the second exhaust gas pathway. In the second position, the valve member may allow fluid flow through the second exhaust gas pathway. The heat exchanger may be in communication with the second exhaust gas pathway and may include a conduit containing a fluid in thermal communication with exhaust gas when the valve member is in the second position.

Abstract: A wastegate assembly in a turbine of an internal combustion engine is provided. The wastegate assembly includes a wastegate conduit bypassing a turbine rotor, a valve sealing plate configured to seat and seal on a wastegate conduit outlet in a closed position, and a flow diverting tab coupled to the valve sealing plate, extending upstream of the wastegate conduit outlet, and separating a wastegate conduit outflow and a turbine rotor outflow.

Abstract: A passive exhaust valve assembly includes an exhaust conduit or pipe section with a valve plate or vane member that can pivot within the interior section or volume of the exhaust conduit to regulate the flow of exhaust gases through the exhaust conduit. A flexible bumper element, such as a metal mesh pad, may be positioned on the interior surface of the exhaust conduit, such that an end portion of the valve plate may contact the mesh pad in the closed position. The bumper element may be disposed in a recessed pocket or depression and may be biased inward, such as with a spring, for the end portion of the valve plate to contact the bumper element as it moves toward the closed position, and thereby gradually reduce the closure speed of the valve plate to the closed position.

Abstract: A turbocharger includes an open-and-close mechanism which opens and closes a circulation hole through which an exhaust gas flows into a turbine housing or the exhaust gas flows out of the turbine housing. The open-and-close mechanism includes: a valve; and an attachment plate one end of which is fixed to the valve, and the other end of which is provided with an insertion hole through which a stem turnably supported by the turbine housing is inserted, and an exposure hole which communicates with the insertion hole to expose part of an outer peripheral surface of the stem. The diameter of the insertion hole is gradually smaller in a direction of insertion of the stem. The stem includes a tapered portion whose diameter is gradually smaller toward its tip end in the direction of insertion into the insertion hole.

Abstract: Provided is a foamable filling device that includes a foamable material and is disposed within a hollow structural member. The foamable filling device includes a carrier member and an opening/closing member. The carrier member includes a through hole and a mounting portion to which the foamable material is mounted. The opening/closing member includes a cover portion formed in a size capable of blocking the through hole; and a biasing portion that biases the cover portion, and the opening/closing member is fittable to the carrier member. The opening/closing member is configured such that, when the opening/closing member is fitted to the carrier member, the biasing portion is elastically deformed and biases the cover portion to thereby bring the cover portion into contact with a seat portion provided at an end of the through hole of the carrier member.