Abstract: A safety valve for a compressed gas container having an overflow duct (2) connected to the compressed gas container and having an outlet duct (3) and having a thermal triggering unit which comprises a closure body (15; 20) that is displaceable out of a standby position in which it holds the overflow duct tightly sealed with respect to the outlet duct in cooperation with a sealing element (9), into a release position in which the overflow duct (2) is connected to the outlet duct and also comprises a burst body (8) which is arranged between an abutment and a closure body (15; 20) to hold the latter in the standby position, such that the thermal triggering unit comprises a spring element (10; 11; 21) which exerts a spring force directed in the direction of the abutment on the burst body (8), characterized in that the closure body (15; 20) is an element having an essentially wedge-shaped cross section and having rotational symmetry about a central axis, said element engaging in the inside diameter of the O ring a

Abstract: A solenoid valve, such as, for example, a tank-vent valve f or tank venting in motor vehicles, includes at least one valve orifice forming a sealing seat, and a valve member, which cooperates with the sealing seat for releasing and closing it, the valve member being stressed by at least one spring element and activated by an electromagnet. An essentially unstressed neutral position of at least one additional spring element, which acts upon the valve member in the activation direction, is provided in which the valve member is set apart from the sealing seat. In this manner, the impact of the valve member on the sealing seat, which may be accompanied by distracting noises and wear, is damped.

Abstract: The invention relates to an outlet connection of a fluid high-pressure light, in particular a high-pressure line for fuel, and comprises an outlet bore, an outlet valve that is situated in said bore, the valve element of which can be displaced in said bore and can be controlled by the pressure prevailing in the high-pressure line in opposition to the action of a spring element, a spring retainer inserted into the outlet bore and fixed in the latter and on which the spring element is supported, and an external thread.

Abstract: Apparatus and methods for hydraulic valve actuation of engine valves are disclosed. An exemplary embodiment of the present invention may include a plurality of slave piston assemblies that impart motion to the engine valves, wherein the motion is operable to open and close the engine valves. A dual diameter master piston assembly may be used to drive the plurality of slave pistons. The dual diameter master piston assembly may be divided into two or more elements with, for example, a spring bias or a button and T-slot assembly to hold the two elements together.

Abstract: A check valve includes a housing formed with a valve hole through which fluid flows, a valve seat formed on the peripheral wall of the valve hole, a valve element disposed in the valve hole to be movable between a valve closed position where the valve element makes close contact with the valve seat to close the valve hole and a valve open position where the valve element moves away from the valve seat in the downstream direction to open the valve hole, a coil spring for biasing the valve element toward the valve closed position wherein the coil spring is larger in outer diameter than valve element, and a pressure acting portion provided to the coil spring so as to undergo the pressure of fluid.

Abstract: An air fitting with an integral check valve includes a housing having an inlet and at least one outlet, a passage extending between the inlet and the at least one outlet with a valve seat being formed in the passage adjacent the at least one outlet with a portion between the outlet and the valve having a plurality of channels separated by lands which form a guide surface for the valve as it is being forced onto the valve seat by a spring. The channels allow passage of air around the valve member with less restriction when the valve member is lifted off the valve seat.

Abstract: A well downhole liquid dispenser is disclosed in which an inlet/discharge port assembly is provided having an inlet port in fluid communication with the shoulders of a conical piston. The point of the conical piston is in physical contact with the discharge channel leading from the center of the inlet/discharge port assembly to the discharge ports on the exterior of the inlet/discharge port assembly. The piston is held in place by an adjustable tensioning mechanism by which the pressure required to depress the piston may be varied to match the hydrostatic column pressure of a liquid column connected to the inlet port of the dispenser such that when the hydrostatic column pressure reaches a desired level, the piston is depressed, allowing fluid to flow from the liquid column regardless of the exterior downhole pressure exerted on the point of the piston through the discharge ports.

Abstract: A pressure control valve is disclosed, which can suppress the generation of noise and vibration due to cavitation when hydraulic fluid is fed from a high-pressure side to a low-pressure side, which is caused by the change of a pilot poppet structure that is in detachable contact with a seat of the pressure control valve to close/open a flow path. The pressure control valve includes a pilot poppet, being detachably in contact with a two-stage seat formed in a flow path connecting a high-pressure path with a low-pressure path, for closing/opening the flow path, an elastic member for elastically biasing the pilot poppet, which has been pressed onto the seat to close the flow path, to its initial state, and a ring-shaped balancing groove formed on a periphery of the pilot poppet that forms a ring-shaped gap in association with the seat when the pilot poppet is lifted from the seat.

Abstract: To protect hydraulic assemblies, in particular to protect hydraulic brace systems, pressure relief valves 1 are used, the closing part 10 of which is formed by a piston 15, which is connected to the connection 4, and the valve spring retainer 12, which comprises said piston, is arranged displaceably thereon and accordingly has a cylindrical design. Between the connection 4, which is equipped with a blind hole 5 and radial bores 6, 7, and the displaceable closing part 10 and/or the correspondingly shaped valve spring retainer 12 a damping chamber 20 is formed, which is directly connected to the blind hole 5 and hence to the system pressure.

Abstract: A multi-drop flow control valve system having a plurality of hydraulically actuated flow control valve, each valve set in an initial operating position. The flow control valves are connected to a hydraulic control line in sequence, wherein the second flow control valve is below the first flow control valve and so on. Wherein a first hydraulic pressure in the control line will operate at least the first flow control valve to an actuated position and a second hydraulic pressure greater than the first hydraulic pressure will operate at least the first and second flow control valves to actuated positions. It may be desired for each of the control valves to be biased in the initial position when the hydraulic pressure is less than a base pressure.

Abstract: A coupling release component for releasabley coupling a shaft of a motor to a further shaft for rotation of the further shaft by the motor shaft having a rotation lock component having an axially disposed first gripping device for connecting the lock to the shaft for inducing rotation of said lock by said motor, a slip coupling component having a second gripping component disposed radially outwardly relative to the first gripping component configured to releasabley interlock with a corresponding third gripping component of a further coupling component for connecting the coupling release component to said further shaft for the rotation thereof and a resilient mounting component mounting said second gripping component to said first gripping component so as to be able to exert a radially outward force on the second gripping component so as to radially bias the second gripping component into interlocking engagement with the third gripping component.

Abstract: A sample chamber is formed by a housing sealed against a microscope slide. The housing has fluid ports, including a well formed over at least one port. In a rinse station, rinse solution is drawn from a reservoir through the chamber to a waste reservoir. At a fill station, an aliquot of reagent already placed in the well is driven into the chamber. The reagent may be driven into the chamber by first drawing a vacuum on the chamber through the aliquot of reagent and then releasing the reagent to be drawn into the chamber by the vacuum.

Abstract: A fuel injection valve for an internal combustion engine, includes a valve element whose switched position depends at least indirectly on the switched state of a piezoelectric actuator that is acted on by a tubular, largely cylindrical prestressing device, which is manufactured out of a plate-shaped starting material and has at least two longitudinal edges that abut each other in such a way that the longitudinal rigidity is altered in this region. The prestressing device has at least one region whose longitudinal rigidity differs from that of a neighboring region and is situated in relation to the abutting longitudinal edges so as to reduce the bending moment that acts on the piezoelectric actuator and is generated by the altered longitudinal rigidity in the region of the abutting longitudinal edges.

Abstract: An exhaust system and a mini-exhaust static pressure controlling apparatus thereof for controlling a process area. The mini-exhaust static pressure controlling apparatus has an exhaust chamber and an auto release damping device. The exhaust chamber has an air inlet connected to the process area receiving air exhaust from the process area, and an air outlet venting the air exhaust. The auto release damping device has a diaphragm pre-stressed in an arc shape with a coefficient of elasticity and an adjusting device for applying a stress on the diaphragm to maintain the arc shape of the diaphragm, and is disposed on the exhaust chamber to control static pressure of the air exhaust in the exhaust chamber.

Abstract: A valve stem seal assembly having a retainer body that includes an annular interior passageway defined by a wall is disclosed. At least one internal sprue extends between top and bottom ends of the retainer body and are formed within the wall. A channel is concentrically formed about the interior passageway on the bottom surface of the retainer body and is in fluid communication with the internal sprue. A sealing material inserted to the sprue extends from the top end of the retainer body through the internal sprue and into the channel such that a single seal body is formed.

Abstract: An actuator (4) is connected, on one side, to a valve needle (3), and on the opposite side, to a hydraulic piston (6) pertaining to a hydraulic length compensator. A working chamber (5) is divided by a tight separating membrane (9), into an actuator chamber (10) containing the actuator (4) and a fluid chamber (11) which can be filled with the fluid to be dosed in a pressurized manner while the actuator chamber (10) and the hydraulic chamber (7) are filled with a hydraulic fluid. A base pressure can be produced in the hydraulic fluid by means of the pressure of the fluid to be dosed, which is transmitted through the separating membrane (9).

Abstract: What is disclosed is a non-return valve comprising a sealing piston which is biased against a valve seat in the basic position inside a valve housing, and which is manufactured by a plastics injection molding technique.

Abstract: A fuel pressure regulator for use in internal combustion engines. The fuel pressure regulator includes a valve seat and a vale body disposed downstream of the valve seat and is designed to move the valve body away from the valve seat through the pressure of fuel applied directly to the valve body. This eliminates the need for a diaphragm and results in a simplified structure of the fuel pressure regulator.

Abstract: A fluid flow regulator useful with swimming pool suction cleaners includes a flow passage conduit for connection between a suction pump and the pool cleaner. A flow bypass conduit is connected to the flow passage conduit for injecting an ambient fluid into a bypass flow passage. A valve operates within the bypass flow passage with a spring carried entirely within the bypass passage for urging the valve toward a seated position. An adjustment knob acts on the spring for modifying a biasing force on the valve urging the valve toward the seated position in opposition to a pressure from a fluid flow within the flow passage urging the valve to the open position.

Abstract: There is provided a valve assembly including: a valve attached to a cylinder head in a movable manner along its axial line direction so as to selectively fluidly connect or close between a combustion chamber and a gas line; a plate-like holding member provided at the valve in a relatively immovable manner along the axial line direction; and a coil spring externally inserted around the valve in a state where its proximal end is directly or indirectly engaged to an external surface of the cylinder head, the coil spring being configured so that its distal end has a diameter smaller than that of the proximal end, wherein the holding member has an engaging surface facing one side along the axial line direction to hold the distal end of the coil spring.

Abstract: A discharging valve assembly for a reciprocating compressor includes a discharging cover coupled with a front frame so as to cover a cylinder in which a piston is inserted; a discharging valve inserted in the discharging cover, and opening/closing an inner space of the cylinder where gas is compressed; and an unbalancedly and elastically supporting means elastically supporting the discharging valve so that contact pressure applied to the discharging valve when the valve comes in contact with the contact surface of the cylinder is unbalanced. Accordingly, the discharging valve assembly can improve discharging efficiency of gas compressed in the cylinder and discharged, and can minimize noise generated when the discharging valve comes in contact with the cylinder while moving.

Abstract: A valve assembly comprising a body member forming a channel having first and second ends, forming a seat surface within and at the first end of the channel about an orifice that faces in the direction of the second end, the channel forming a first coupler at the second end, a closure member forming a closing surface and an oppositely facing bearing surface, the closing surface configured to be received on the seat surface to close the orifice, the closing member received within the channel with the closing surface facing the seat surface, a spring member having first and second ends and received within the channel with the first end of the spring member contacting the bearing surface and an adjustment member having first and second ends and forming a second coupler at the first end of the adjustment member that cooperates with the first coupler to mechanically link the adjustment member within the channel in various relative juxtapositions, one of the adjustment member and the body member forming an outlet pa

Abstract: A pressure regulator for a fuel supply system of an internal combustion engine for regulating a fuel pressure, including a valve, having a valve ball forced against a valve seat into the closing position by the action of a valve leaf spring. With the valve open, at least some of the fuel flow that flows around the valve ball is deflected against an impact face coupled with the valve leaf spring for generating a flow force oriented counter to the closing force of the valve leaf spring. As a result, the pressure regulating performance of the pressure regulator is improved.

Abstract: A pressure regulator for regulating fuel pressure in an internal combustion engine, containing a valve including a closing member forced into a valve seat by the action of an angularly shaped valve leaf spring one arm of which is braced on the closing member and the other arm is braced on a support member of a regulator housing. In the region of its angled portion, the leaf spring is fixed on a pin supported in the regulator housing, and the bearing of the pin in the regulator housing contains side walls of the regulator housing that wrap around bearing bores in the valve leaf spring with parallel spacing and that extend substantially perpendicular to the pin. The side walls are overlapped at least in part by tabs that are connected to the support member of the regulator housing and are provided with bearing bores for the pin which are coaxial relative to the bearing bores in the side walls.

Abstract: A normally closed solenoid valve includes a fixed core, a valve portion including a valve seat and a valve body, a movable core disposed between the fixed core and the valve seat, a resilient biasing member for biasing the movable core in a valve-closing direction and a coil. When energized, the coil generates an attracting force between the movable core and the fixed core against a biasing force by the resilient biasing member to cause the movable core to retreat from an initial position where the valve seat is in a closed state. When a characteristic graph line of spacing distance/attracting force that defines the attracting force in relation with a spacing distance between the fixed core and the movable core provides an inclination A (N/mm) at the initial position, the compression resiliency coefficient of the resilient biasing member is set to A (N/mm).

Abstract: The invention provides a flap valve for controlling the air pressure within a protected space defined by walls, the flap valve including a valve frame attachable to an opening made in the walls, a valve flap, articulated at least indirectly to the frame and being subjectable to both a sealing force which forces the valve flap against the valve frame and to an opening force which lifts a portion of the flap off the valve frame; the flap valve having a first position in which the protected space is sealed off from a contaminated environment, and a second position in which air from the protected space is allowed to escape into the environment via the opening, wherein the sealing force is constituted by at least one spring at least indirectly attached to the valve flap and the valve frame.

Abstract: An improved valve assembly (100) includes a primary spring (142) which extends along a valve stem (144). A spring retainer (150) holds the primary spring (142) on the valve stem (144) and has a thread convolution (152) which engages a thread convolution (154) on the valve stem (144). The spring retainer (150) has a force transmitting surface (182) which engages a reference surface (184) on the valve stem (144) with a retainer preload force which is at least as great as a primary spring preload force. Shims (158–162) are provided between the primary spring (142) and the spring retainer (150) to enable a desired primary spring preload force to be obtained.

Abstract: A check valve for use in a pump. The valve is arranged to be subjected to severe service conditions and high impact loads, yet be resistant to damage to its components. The check includes a body, a valve seat, a poppet and an impact cushion. The poppet is movably coupled to the valve seat and is biased by a spring into engagement with the valve seat. Upon the opening of the valve the poppet moves off of the valve seat and into engagement with the impact cushion against the spring bias. The impact cushion is movably coupled to the valve body and is biased by another spring. When the poppet engages the impact cushion they stay together and move, with the movement of the impact cushion absorbing energy from the poppet.

Abstract: A solenoid valve moves an armature back and forth between valve open and valve closed positions without the armature having any sliding engagement with any fixed valve part. This is accomplished by supporting the armature with a spring having one periphery engaging a fixed valve surface and another periphery engaging the armature so that armature movement causes flexure of the spring, but no sliding contact. This helps prevent generation of dirt within the valve and ensures accurate armature movement to make the valve durable and reliable. Springs in both washer and cylindrical helical shapes can accomplish this.

Abstract: In the housing 1 of a hydraulic machine, the pressure Pi acts in the chamber 2. For this purpose, a passage opening 4 is provided, which is formed as a valve seat 5. A valve body 6 can be displaced longitudinally in the housing 1 and forms a pressure-tight spring chamber for an inner valve spring 21. The spring chamber is connected to the chamber 2 via a pressure equalizing hole 9. The prestress of the inner valve spring 21 can be set by means of a setting screw 18. In addition, there is an outer valve spring 22. Both the valve springs load the valve body 6 with the effect of closing it. The pressure equalizing valve described combines a compact design with an advantageous flow characteristic. When a maximum value of p1 is reached, the valve body 6 lifts off the valve seat 5 and hydraulic fluid from the chamber 2 flows away via the valve chamber 3.

Abstract: A solenoid valve moves an armature back and forth translationally between valve open and valve closed positions without the armature having any sliding engagement with any fixed valve part. This is accomplished by supporting the armature with a spring having one periphery engaging a fixed valve surface and another periphery engaging the armature so that armature movement causes flexure of the spring, but no sliding contact. This helps prevent generation of dirt within the valve and ensures accurate armature movement to make the valve durable and reliable. Springs in both washer and cylindrical helical shapes can accomplish this, and the armatures supported by such springs can accommodate valve closing seals of different materials and shapes.

Abstract: In a valve gear mechanism of an internal combustion engine, there is provided a valve opening and closing a combustion chamber, a spring device which generates a force pressing the valve toward a valve seat, a drive mechanism driving the valve in an opening direction via an operating section capable of being in contact with and separated from the valve, and a separation inhibiting device which inhibits a separation between the operating section and the valve.

Abstract: The spray gun is subdivided into a first body (4), in ternally of which a cavity (6) is afforded, and a second body (5) which is perpendicular to the first body (4) and internally afforded a through hole (25) communicating with the cavity (6). An obturator (14) is present internally of the cavity (6), on which obturator (14) elastic means (21) act. Means for activating (26) are located internally of the through hole (25), which activate the obturator (14) and open into the cavity (6) and are in contact with the obturator (14).

Abstract: A thermally actuated fluid shuttle valve that is a three-way direction control valve that shifts when fluid passing through said valve reaches a preset temperature. The control valve, including three ports, an internal shiftable spool, and a thermal element, wherein fluid entering a first port from a source of heated fluid passes around a thermal element and out of a second port, until the fluid is warm enough to cause the thermal element to expand, thereby shifting said spool so that the first port is closed, and the second and third ports are in fluid communication with each other.

Abstract: A control valve includes an elastomeric flow tube, a plunger having first and second ends, and a pinch member connected to the first end of the plunger. The pinch member is situated adjacent the flow tube. A reference surface is positioned generally opposite the pinch member such that the elastomeric tube is squeezable between the pinch member and the reference surface to control fluid flow through the flow tube. A first guide spring is situated between the pinch member and the first end of the plunger, and a second guide spring is situated adjacent the second end of the plunger. A damper may be connected to the plunger. Further, a pressure containing member may situated about at least a portion of the flow tube.

Abstract: A check valve comprising a poppet urged by a conical spring to annularly seal uniformly around its entire periphery to assure more uniform cracking pressure about its entire periphery. The cracking pressure may be adjusted by means of an adjustable plate which reduces the length of the conical spring and thereby increase the amount of force exerted by the spring onto the poppet into sealing engagement, thereby increasing the cracking pressure.

Abstract: A valve for supplying fuel gas to a fuel gas appliance comprises a valve housing which defines a valve chamber within which a main carrier member is axially moveable. The main carrier carries a primary and a secondary valving member for co-operating respectively with a primary and a secondary valve seat. A pilot fluid outlet supplies fuel gas to a pilot jet. A stepper motor comprising a rotor and four magnetic coils urges the main carrier between a fully open and closed position. An electro-magnetic coil located in the main carrier magnetically couples primary and secondary end plates to the main carrier. Magnetic decoupling of the primary and secondary end plates from the main carrier permits the main carrier to be urged into the closed position by primary compression springs. The drive transmission comprises a drive shaft from the rotor of the stepper motor and a drive spindle.

Abstract: A proportional solenoid control valve comprises a flat square spring which is wide in maintaining width with respect to displacement of a spring having a greater spring constant, so that accurate control of fluid is realized. The flat square spring has four tubs and is supported with respect to a step face with outer peripheral section thereof. The valve further comprises a sealing mechanism loaded with rubber resilience compensates instability of armature construction and resilient sealing section. The spring constant of the flat square spring is improved by strengthening the magnetic force, thus hysteresis can be made to be smaller.

Abstract: A poppet-type check valve for controlling fluid flow, and including a valve housing having an interior and first and second ports therein communicating with the interior of the valve housing for permitting fluid flow from an upstream side to a downstream side thereof. At least one valve assembly is disposed within the interior of the valve housing for controlling the fluid flow therethrough. The valve assembly includes a valve seat positioned in the interior of the valve housing and a seal retainer positioned in the interior of the valve housing downstream from the valve seat and mounted on a stem. The seal retainer and the stem are axially moveable away from the valve seat in response to fluid flow in a downstream direction at a predetermined flow rate, and axially moveable towards and into sealing engagement with the valve seat in response to a downstream fluid flow at a flow rate less than the predetermined flow rate.

Abstract: A spring locating body (36) is a substantially annular shape formed with an annular recess (38) and a radially inner circular hole (40) that extends through the spring locating body (36). The spring locating body (36) is a substantially rigid plastically deformable material such as nylon. Extending radially outwardly from the spring locating body (36) are four limbs (42). The limbs (42) are equally spaced around the spring locating body (36) at intervals of 90°. Extending away from the rear surfaces of each limb (42) is a deformable rib (44). Each rib (44) extends across the respective limbs (42) in an arc about the central axis (46) of the spring locating body (36). The ribs (44) have a triangular cross-section the apex of which is distant from the limb (42). Alternatively, the ribs (44) can be in the form of a plurality of cone shaped nibs extending in a direction away from the surface of the respective limbs (42).

Abstract: A valve designed to limit inadvertent operation of the valve. The valve has a shortened plunger, a collar to prevent tilt of the plunger, and a conformable ring on the valve face. The plunger is provided with a groove sized and dimensioned to partially receive the inner surface of the ring.

Abstract: A pressure control valve includes a shaft hole formed through a wall surrounding a pressure detecting chamber of a body, the shaft hole being provided with a valve port, a communication shaft inserted through the shaft hole and having an end protruding from the valve port and provided with a valve element, a biasing unit, a branch hole, a sealing member, a pressure sensing cylindrical member, a diaphragm mounted on the open end of the pressure sensing cylindrical member, a terminal wall formed on the body so as to be opposed to the diaphragm, and a stretching member stretched between the diaphragm and the terminal wall, the stretching member being subjected to a spring force the diaphragm receives when the fluid pressure is in the pressure detecting chamber is lower than the predetermined reference pressure, thereby moving the valve element to the opening side.

Abstract: The invention relates to a pressure regulator for a fuel delivery system of an internal combustion engine for regulating a fuel pressure, including a valve, which has a valve ball that is pressed against a valve seat in the closed position by the action of a valve leaf spring. A segment of a hemisphere of the valve ball oriented toward the valve leaf spring protrudes into a recess associated with the valve leaf spring. This improves the noise behavior and regulating behavior of the pressure regulator.

Abstract: A lightweight valve spring retainer with a wear resistant spring seat or seats is provided. The spring seats may be defined in part by a tungsten carbide layer.

Abstract: In an electronically controlled throttle apparatus, a coil spring is shaped to extend from a U-shaped hook portion which is a joint between a first spring portion having a returning function and a second spring portion having an opening function to the other end of the second spring portion. A coating of a lubricant is provided on a sliding contact area between the inside circumferential surface of the coil spring and the outside circumferential surface of the second spring inside circumferential guide. Thus, the sliding resistance in relative motion between the coil spring and the second spring inside circumferential guide can be significantly reduced.

Abstract: A check valve device includes a valve section of a valve plug arranged in a fluid passage of a body, the valve plug being in a valve-opened state when separated from a seat section, and the valve plug being in a valve-closed state when seated on the seat section, and an elastic member which urges the valve section by the spring property of bent spring sections so that the valve section is seated on the seat section. The body, the valve plug, and the elastic member are formed of resin materials.

Abstract: A pressure control device and associated method of use capable of regulating fluid pressure for multiple fluid types. The pressure control device includes a fluid sensing port, a pressure responsive device, a fluid sensing port, a valve, a valve seat, a first valve chamber, a second valve chamber that is moveable in relationship to the first valve chamber, a first member located within the first valve chamber, a first biasing mechanism located between the pressure responsive device and the first member, a first adjustment mechanism adjustably attached to the first valve chamber for selectively positioning the first member in relation to the first valve chamber, a second member located within the second valve chamber, a second biasing mechanism to apply pressure to the second member and a second adjustment mechanism adjustably attached to the second valve chamber for selectively positioning the second member in relation to the second valve chamber.

Abstract: Disclosed herein is a variable spring force intake valve for use in two- or four-stroke internal combustion engines. The device comprises an intake valve body and a torsion spring attached to a gear and rod assembly. Manipulation, via manual or automated means, of the gear and rod assembly adjusts the tension/torsion force exerted by the torsion spring to preload the intake valve and/or to hold the intake valve in the closed position. Varying the tension/torsion force results in an ability to control the timing and the degree to which the ports of the intake valve are actually opened during the operating cycle of the piston, thereby providing a user with an opportunity to enhance the operation of a two- or four-stroke internal combustion engine.

Abstract: A check valve comprises: a pair of cylindrical body elements (1, 4) through which a fluid passes; a cylindrical valve element (7), which is disposed inside an upstream-side one (4) of the cylindrical body elements (1, 4), constantly subjected to a fluid pressure and biased toward its closed position under the influence of a resilient force exerted by a compression coil spring (10) coated with a tubular element; and, a stopper element (24) disposed in a downstream-side one (4) of the cylindrical body elements (1, 4). The check valve is characterized in that at least one of the cylindrical valve element (7) and the stopper element (24) is provided with a spiral seat portion (11) an axial spiral surface of which is brought into stable surface-contact with the compression coil spring (10) to support the compression coil spring (10) therein.

Abstract: A gas shuttle valve is for an internal combustion engine, in which a valve plate, as a sealing element, a tubular valve shaft, as a guide element, and a thrust part, which seals the end of the valve shaft opposite to the valve cone, as a stop for a valve operating element having a support for a typical valve spring, are welded to one another. This production method is distinguished by a precisely fitted assembling of these parts to a predetermined length measure, which precedes the permanent bonding of the valve shaft and thrust part.