Abstract: A spring retainer can reduce the set height and mass of a coil spring. The spring retainer has a retainer body attached to a stem end of a valve and a circumferential plate-like spring part having an inner circumferential part supported by the retainer body and resiliently supporting an end of the valve spring. A spring constant of the plate-like spring part is made higher than a spring constant of the valve spring, so that the plate-like spring part deflects after the valve spring is compressed, to provide a two-step load characteristic and reduce the set height, compressed height, and mass of the valve spring. It can also reduce the height and mass of the spring retainer. A spring system formed by combining the spring retainer and valve spring with each other will be compact and lightweight.

Abstract: A valve shaft 8 and a drive shaft 11 of an EGR valve 1 are butted to each other; protrusions 26a, 26b, 27a, and 27b formed on the inner sides of cotter members 24, 25 of a cotter 23 are engaged with grooves 21, 22 respectively formed on the outer peripheral surfaces of the ends of the shafts 8, 11; the urging force of a spring 28 for exerting an urging force in the closing direction of valve disks 6, 7 on the cotter 23 is applied to the cotter 23 through a spring holder 30 to press the protrusions 26a, 26b, 27a, and 27b to the grooves 21, 22.

Abstract: A flow through pressure regulator apparatus and method for directing a flow of fuel and reducing valve seat wear within a fuel system. Present invention includes a lower housing having fuel inlet where fuel flows through the fuel inlet and communicates with a valve assembly and valve biasing member. The valve assembly comprises a lower and upper valve member where the lower valve element contains a plurality of fuel passages. The valve biasing member permits or inhibits fuel flow through the lower valve member by opening and closing an upper valve member. The valve biasing member comprises a flat disk having at least two reticulated concentric rings coupled by at least one bridge. The fuel flows past an open upper valve member through the plurality of fuel passages that encircle the lower valve member to the valve biasing member. The valve biasing member then diffuses the flow of fuel. A fuel cover directs the flow of fuel from the valve biasing member to the fuel outlet.

Abstract: Valves, and particularly check valves, are detailed. The valves may isolate a spring or other biasing member from flowing fluid so as to reduce the possibility of damage to the spring caused, for example, by chemicals contained in the fluid. In some versions of the valves, the spring may be positioned within a cavity of a cover sealed from the fluid.

Abstract: A system to reduce standby losses in a hot water heater is presented. The system utilizes a dual safety relay valve between the combination gas controller and the burner. The dual safety relay valve bypasses gas to a rotary damper actuator valve to position a damper flapper valve located over/inside the flue pipe. Once the flapper valve has opened to ensure combustion, the gas is allowed to flow back to the dual safety relay valve. Some of the bypass gas may be diverted to boost the pilot or to supply a booster. The dual safety relay valve is then opened to allow the gas supply to the burner. Once the burner is turned off, bypass gas bleeds out of the rotary damper actuator valve to close the damper flapper valve to reduce standby losses through the flue pipe, and to allow the dual safety relay valve to close tightly.

Abstract: A pressure management apparatus including a housing (30) defining a fluid communication passage between first and second fluid ports (46, 48). A poppet (40) is disposed in the housing and is movable between first and second positions. The first position prevents fluid communication between the first and second fluid ports, and the second position permits fluid communication between the first and second fluid ports. The poppet includes a portion (75) translatable along an axis relative to the housing. A member (78) is fixed with respect to the housing and is associated with the portion of the poppet. Spring structure (72) is associated with the portion of the poppet. The spring structure is constructed and arranged to engage and bias the portion of the poppet to frictionally engage a portion of the member to create a dashpot damping of resonance of the poppet in the second position.

Abstract: An air flow damper is formed of a multi-apertured flexible sheet sandwiched between two multi-apertured rigid plates, the sheet being slidable between the rigid plates and movable from an open configuration to a closed configuration in which latter the apertures of the rigid plates are sealably closed by the flexible sheet.

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: A microvalve for controlling fluid flows, and a sealing device for sealing cavities in a microfluidic system, particularly in a lab-on-a-chip system, and a method for the production thereof. A sealing surface of a valve body, or a sealing element, respectively, rests on a sealing surface of a substrate and is pressed against the sealing surface of the substrate in a fluid-tight manner by means of a clamping element. The clamping element and/or the valve body, or the sealing element, respectively, are at least partially elastic.

Abstract: An actuator comprising a cylinder and a spring return piston provided with linkage means, in which one or more return springs are situated on the same side of the piston as the linkage means.

Abstract: A pressure relief valve is disclosed. The pressure relief valve comprises a body, a valve member, and a resilient member. The body includes a guide bore, a seat surface, an inlet, a first outlet, and a second outlet. The valve member is received within a portion of the body and includes a guide portion received within the guide bore, a valve seat configured to sealingly engage the seat surface, and an internal passage. The resilient member biases the valve seat into engagement with the seat surface. The valve member is moveable between a first position in which the inlet is fluidly blocked from the first outlet and the second outlet, a second position in which inlet is fluidly coupled to the first outlet but not to the second outlet, and a third position in which the inlet is fluidly coupled to the first outlet and the second outlet.

Abstract: The invention relates to a spring retaining sleeve having a cylinder press-fit connection surface which has a press-fit diameter and a press-fit length. To enable cost-effective production of a stable press-fit assembly, at least one end of the cylinder press-fit connection surface, an optimized insertion chamfer for long press-fit assemblies is provided with a ratio of press-fit diameter to press-fit length of greater than thirty five percent.

Abstract: A filter includes top and bottom support frames, and one or more middle support frames, which are arranged in such a manner that a second stepped area recessed by a predetermined depth from the outer circumferential surfaces of the top and bottom support frames is formed by the top and bottom support frames and the middle support frames. A pressure control valve of an electronically controllable power steering apparatus includes: a hollow valve body having a first stepped area with a predetermined depth, the first stepped area being formed on the outer circumferential surface of the valve body, where a supply port is formed; and the above-mentioned filter, the filter being fitted in the first stepped area of the valve body. The filter can minimize change of pressure at the filter area while assuring smooth supply of the hydraulic fluid, and can reduce the number of parts, the number of fabricating steps, and the material costs of such a pressure control valve.

Abstract: A pressure actuated valve assembly includes a valve body. The downstream end portion of a main spring is engaged with a downstream end portion of the valve body and the main spring is axially aligned with the valve body. A main spring guide is engaged with an upstream end portion of the main spring proximate an upstream end portion of the valve body. The main spring guide is mounted for movement toward the downstream end portion of the valve body by compression of the main spring. A hold-down sleeve is engaged with the downstream end portion of the valve body and includes a stop structure proximate the main spring guide. The stop structure is configured to engage the main spring guide to maintain a predetermined minimum clearance between the main spring guide and the upstream end portion of the valve body with the valve body in the closed condition.

Abstract: A suction valve seat and guide assembly has an outer ring and a peripheral flange projecting outwardly from the bottom of the outer ring, and an inner surface with a top part sloping downwardly and inwardly toward the center of the outer ring. The outer ring has an outer surface that slopes upwardly and inwardly from the flange. The guide has an inner ring positioned within the outer ring and a number of spaced-apart fins connecting the inner ring to the outer ring. A retainer has an internal passageway, an externally threaded, upper segment within the top of which is fitted the peripheral flange of the seat; a middle segment that is affixed to the bottom of the upper segment and has a polygonal cross section for easy gripping by a wrench; and, a bottom segment that is affixed to the bottom of the middle segment.

Abstract: Methods and apparatus for adjusting a spring load in an actuator are described. An example actuator includes a housing and a plate. Further, the example actuator includes one or more springs disposed in the housing to apply a force to the plate. Additionally, the example actuator includes a spring load adjuster having a collar extending through and movably engaged to the plate to enable an adjustment of the position of the collar relative to the plate to change a load provided by the one or more springs.

Abstract: A non-return valve for a hydraulic tensioning system which is used in traction mechanism drives of internal combustion engines and which manipulates a hydraulic fluid flow between a pressure chamber and a reservoir. The non-return valve has a valve body which is inserted in a housing and which is embodied as a ball and which, when the non-return valve is closed, is supported in a spring-loaded fashion against a valve seat of a through-flow cross-section. When the non-return valve is open, the valve body is assigned to a valve seat of the housing and the flow cross-section (19) of the valve seat ensures a fluid flow through the non-return valve.

Abstract: A high-pressure pump for feeding fuel to an internal combustion engine has a pump housing; a fuel delivery duct; and a check valve, which is arranged along the delivery duct, and comprises a fuel chamber; a valve member mobile within the fuel chamber; and a biasing and guiding assembly, which has a fastening member suitable for being fastened to the pump housing and sealing the fuel chamber in a fluid-tight manner; a helical spring suitable for biasing the valve member; and a bushing arranged about the helical spring in order to prevent bending of the helical spring.

Abstract: A pendulum gate valve including an expandable gate which pivots when unexpanded to selectively block a vacuum or other pressure-differential passage. The valve includes a valve plate sealing one side of the passage and a ring abutting an opposed side of the passage when the gate member is expanded. A compression spring biases apart the valve plate and ring to close the valve by means of respective two-stage hangers attached thereto, extending along the spring, and having distal ends capturing the spring. Pneumatic pressure applied to a pneumatic cavity formed between the middles of the two-stage hangers and accommodating the spring forces apart the valve plate and ring to open the valve in the blocking position. Thereby if pressure fails, the valve fails to a sealed state. The axially movable valve plate is advantageously water cooled to allow use with a heated processing chamber.

Abstract: A pendulum gate valve including an expandable gate which pivots when unexpanded to selectively block a vacuum or other pressure-differential passage. The valve includes a valve plate sealing one side of the passage and a ring or barrier plate abutting an opposed side of the passage when the gate member is expanded. A compression spring biases apart the valve plate and ring to close the valve by means of respective two-stage hangers attached thereto, extending along the spring, and having distal ends capturing the spring. Pneumatic pressure applied to a pneumatic cavity formed between the middles of the two-stage hangers and accommodating the spring forces apart the valve plate and ring to open the valve in the blocking position. Thereby if pressure fails, the valve fails to a sealed state. The axially movable valve or barrier plate is advantageously water cooled to allow use with a heated processing chamber.

Abstract: Needleless access port valves are generally discussed herein with particular discussions extended to needleless access port valves having a stretchable or flexible band. In accordance with aspects of the present invention, the band is held in between a flange section of an inlet connector assembly and a shoulder section of the valve body. A plunger integrally formed with the band is movable inside a nozzle to control fluid flow through the inlet of the valve. When the plunger is urged by a medical implement to open the valve inlet, the band flexes to accommodate the moving plunger.

Abstract: Disclosed is a one-way valve of a variable capacity compressor for vehicle including: a valve sheet having a coolant inlet formed at the center; a valve case provided over the valve sheet and having a plurality of coolant discharging ports along the circumferential surface; a spool valve selectively opening/closing the coolant inlet and the coolant discharging port in the valve case; and a resilient member provided between the valve case and the spool valve, wherein the plurality of coolant discharging ports are spaced from each other by a predetermined distance and one of the plurality of coolant discharging ports is closed so that the spool valve is brought in tight contact with an inner wall surface of the valve case when the coolant discharging ports are initially opened not to be swayed left and right.

Abstract: A valve includes a valve element; a valve seat; a coil spring; and a spring bearing portion. The coil spring, provided between the valve element and the spring bearing portion, presses the valve element toward the valve seat. An effective upper winding end of the coil spring and an effective lower winding end of the coil spring are offset from each other by 180 degrees in a plan view.

Abstract: A bypass valve assembly for a generator includes a spring cover with a flange which extends in a radial direction from a spring cover body. The spring cover body defines an overall length dimension, the overall length dimension to an end of the spring cover body to the flange dimension defines a ratio between 1.6:1-1.2:1. The bypass valve assembly also includes a valve sleeve with a multiple of windows. Each of the multiple of windows includes a longitudinal edge which defines a longitudinal edge radius and corner radius.

Abstract: A pressure control valve has a non-uniformly tapered valve bore that has an increasing diameter as it extends downstream. An interface angle, defined in part between a valve ball and the valve bore in the area of the smallest gap between them, increases as the valve ball is increasingly displaced away from a valve seat of the valve bore.

Abstract: A regulator having a valve body defining a flow-path for a fluid and having a valve seat, an actuator casing coupled to the valve body, a control member disposed within the actuator casing and adapted for displacement relative to the valve body and the valve seat for regulating a flow of the fluid through the flow-path by moving between an open position and a closed position wherein the control member engages the valve seat, and a spring operatively coupled to the control member and biasing the control member toward the open position. The control member includes a surface facing the valve seat that is recessed. The recessed surface may be a counter-bore, or may have a convex shape, conical shape, or other appropriate recessed surface. So configured, the regulator displaced improved stability in high inlet pressure, low output pressure, high flow rate implementations.

Abstract: A flow through pressure regulator apparatus and method for directing a flow of fuel within a fuel system. Present invention includes a lower housing having a fuel inlet where fuel flows through the fuel inlet and communicates with a valve biasing member through a fuel chamber and lower valve element with fuel passages. The valve biasing member permits or inhibits fuel flow through a fuel chamber by opening and closing a ceramic valve element. The valve biasing member comprises a flat disk having at least two reticulated concentric rings coupled by at least one bridge. The fuel flows past an open valve element through the lower valve element fuel passages to the valve biasing member. The valve biasing member then diffuses the flow of fuel. A fuel cover directs the flow of fuel from the valve biasing member to the fuel outlet.

Abstract: A fuel distributor valve (19) of a type suitable for use in the fuel supply system of a gas turbine engine is disclosed. The valve comprises: a valve body (22) through which a bore (24) extends between a fuel inlet (22) and a fuel outlet (23); a first valve seat (28) and associated valve member (30) provided across the bore (24), the first valve seat (28) defining at least one fuel-flow-port (26) and the valve member (30) being moveable between a closed position in which it substantially seals against the first valve seat (28) to close the or each fuel-flow-port (26) and an open position in which it is spaced from the first valve seat (28) to permit the flow of fuel through the or each fuel-flow-port (26) in a direction flowing from the fuel inlet (22) towards the fuel outlet (23).

Abstract: A compact valve using a shape memory alloy comprises: a moving valve body that contacts an inner periphery of a guide pipe having an built-in orifice, is freely movable and has a sealing portion to seal the orifice; a biasing coil provided between the orifice and the moving valve body; and a wire formed of a shape memory alloy and held between a stationary electrode of the guide pipe and a moving electrode of the moving valve body. The orifice is sealed by moving the moving valve body due to transformation of the shape memory alloy by heating the wire. The moving valve body is enabled to be elastically deformable by providing a coil spring to reduce a stress, so that an overload to the moving valve body due to contraction of the wire is absorbed by elastic deformation of the moving valve body. Thereby, the overload to the shape memory alloy is reduced to prevent deterioration of repeatability of memorized shape, to increase durability and reliability of the valve.

Abstract: A variable flow valve is provided. The variable flow valve includes a housing, an actuator, a biasing agent, positioning coils, and a locking coil. The housing defines a bore, an inlet, and an outlet. The actuator is moveably disposed within the bore and configured to selectively obstruct and expose the outlet. The biasing agent is disposed within the bore. The biasing agent is also interposed between the housing and the actuator to bias the actuator toward the outlet. The positioning coils are disposed about the housing and operable to drive the biasing agent to a retracted position. The locking coil is disposed about the housing proximate the biasing agent. The locking coil is operable to capture the biasing agent in the retracted position. As such, the positioning coils are thereafter able to move the actuator free of the bias from the biasing agent.

Abstract: An additive-storing tank assembly includes: a tank body having an additive-storing space defined in the tank body, in which an additive is stored; a plunger-holding tube provided at one side of the tank body in order to connect the additive-storing space with a water supply pipe for supplying water to a dispenser of a refrigerator; and an opening/closing means for selectively connecting the additive-storing space with the water supply pipe so that the additive stored in the additive-storing space is dissolved in the water flowing through the water supply pipe.

Abstract: A non-sliding solenoid valve has an armature supported by a spring for movement with no sliding contact with other valve surfaces. An inner perimeter of the spring is snapped into position adjacent to an inner perimeter reference surface on the armature. An outer perimeter of the spring engages a reference surface on a shell of the valve, and another reference surface spaced, from the spring reference surface, receives an outer perimeter of a seat for the valve. When the seat is positioned against its reference surface, this urges the inner and outer perimeters of the spring against respective reference surfaces and completes the assembly with assured accuracy.

Abstract: A valve for a floating roof emergency drainage system for draining fluid accumulated atop the floating roof, including: a. a valve body having: i. a top part having a cylindrical bore of first diameter, ii. a bottom part formed by a circumferential wall which extends axially downward from the top part and defines within the wall a cylindrical bore of second diameter that is generally coaxial with and greater than the first diameter, thereby defining at the junction of the top and bottom part bores a downward facing shoulder which serves as a valve seat, b. the circumferential wall of the bottom part having at least one fluid discharge passage extending transversely therethrough for discharge of the fluid from the valve, c. a valve seal element axially movable in the bottom part bore between (i) an upper closed position where it abuts the shoulder, and (ii) a lower open position spaced axially downward from the upper closed position, and d.

Abstract: A valve mechanism for controlling release of pressurized fluid includes a fluid chamber. A plunger is received in an aperture in the fluid chamber, and is movable between a fluid retention position in which fluid is substantially trapped in the fluid chamber and a fluid release position in which fluid can escape from the fluid chamber through passages in the plunger. The plunger is biased into the fluid retention position. A driver drives a plunger actuator, and the plunger actuator is guided into engagement with the plunger to cause the plunger and the plunger actuator to move in unison and move the plunger into the fluid release position during a first portion of a stroke of the driver towards the fluid chamber, and the plunger actuator is further guided to permit the plunger to return to the fluid retention position during a second portion of the stroke.

Abstract: A hydraulic tensioning device is provided for a traction mechanism drive, in particular for a chain or belt drive of an internal combustion engine. The device includes a tensioning piston which is guided in a displaceable manner in a cylinder, with a pressure chamber being defined between the tensioning piston and the cylinder which is used to receive hydraulic fluid. A pressure relief valve is provided which limits the pressure in the pressure chamber. The pressure relief valve (8) includes, at least partially, a pre-assembled assembly (10) which can be inserted or is inserted into the tensioning piston (4).

Abstract: A pressure-sensing valve comprises a first housing part, a second housing part, a first regulating knob, a second regulating knob, a valve piston, an upper washer and lower washer, and a pair of springs. The housing parts each has an inner space for moveably receiving the other elements therebetween, and connected with the regulating knobs by a threaded portions. The regulating knobs adjustably abut against the opposite ends of the pair of springs to shift the balanced position thereof to a gating position for closing the pressure-sensing valve under a desired compressed length of the springs and opening for temporarily responding to the acceleration of engine.

Abstract: A valve for controlling volume flows of fuel supply systems of internal combustion engines has a conduit having an inlet and an outlet defining a flow direction. A bypass opening is provided in the conduit. A sleeve is slidably arranged in the conduit and covers in one position the bypass opening completely. The sleeve has an axial through bore that connects the inlet and the outlet. An elastic element that is arranged in the conduit and exerts onto the sleeve a force that is directed toward the inlet. A counterforce is generated by the flow resistance of the sleeve that counteracts the force of the elastic element.

Abstract: A discharge valve (100) of a compressor is disclosed. The discharge valve (100) contains a spring-loaded valve body (120). Valve body (120) is preferably made of nonferrous metal like aluminum or magnesium and is coated by a covering (110) of uniform thickness, the covering (110) being preferably made of plastic material like polyetheretherketone (PEEK) by insertion molding. By that way a wear resistant and light-weight discharge valve is produced.

Abstract: A motor-operated valve includes a driving unit including a rotor and a stator, a feed screw mechanism, and a valve main body unit. In order to remove backlash intrinsic in the feed screw mechanism, a coil spring that urges a valve body in a direction away from a valve seat is arranged in a valve chamber. A spring bearing that forms a housing, in which the coil spring is housed, in the valve chamber is provided. Therefore, the large valve chamber is secured in the valve main body unit and passing sound is reduced when a fluid passes the motor-operated valve. Contact surfaces of the valve body and the coil spring can be aligning curved surfaces that absorb a bend of the coil spring.

Abstract: A thermal bypass valve for a heat exchanger circuit includes a valve housing forming a valve chamber including a bypass passage and ports for the flow of heat exchange fluid into and out of the valve chamber as well as a bypass port defined by a valve seat. Two axially aligned thermally sensitive actuators are mounted in the chamber, each with an actuator body and its own movable piston extendible from one end of the body. One of these pistons operably engages the actuatory body associated with the other piston. Each actuator body is normally movable in the chamber in response to extension of its piston. One of the actuators extends its piston at a higher temperature than the temperature required for the other actuator to extend its piston. A bypass valve member is mounted on one of the actuators and can be moved by either actuator from an open position to a closed position.

Abstract: An electrically controlled proportional valve provides for precise control of armature movement using an armature which is positioned at the center of the valve by centering leaf springs. The armature is supported and biased axially by angled leaf springs that support the armature in an orbital fashion. These angled orbital leaf springs support the armature for elastic movement in the axial direction, and hold it biased against a first port, so that the armature functions as a valve element, which normally closes that port. A magnet coil is positioned so that when an electrical current passes through the coil, it exerts a force on the armature which overcomes the bias of the orbital leaf springs and draws the armature away from the first port and toward the magnet coil.

Abstract: A gas pressure regulator comprises a main body having a first, gas inlet pipe and a second, gas outlet pipe, a calibrated gas passage through which gas flows from the first pipe to the second pipe, a shutter housed at least partially in the main body and mobile lengthwise along a first defined line to adjust the opening of the calibrated passage, a device for actuating the shutter and a regulator spring unit opposing the movement of the shutter.

Abstract: A valve having at least one first valve chamber (1) which has an inlet opening (2) for the supply of a medium and a valve opening (3) which can be closed off by means of a valve body (4), which valve body (4) is acted on by a spring force (F K) which acts in the closing direction and which is generated by a force store (9) which has a spring constant and which valve body (4) can be adjusted counter to the spring force (F K) by means of an actuating element (5) to which an actuating force (F S) which acts counter to the spring force (F K) can be applied at an action point (10), is characterized in that means (7, 8) are provided, by way of which the spring constant which acts at the action point (10) of the actuating force (F S) can be set.

Abstract: Apparatus to vary the effective spring rate of diaphragm actuators are described. An example spring assembly for use in a diaphragm actuator includes a first spring operatively coupled to a diaphragm plate and an actuator stem, and a second spring operatively coupled to the actuator stem and configured to be serially operative with the first spring. Additionally, a movable spring seat is disposed between the first and second springs.

Abstract: The invention relates to a solution for cleaning a milking plant, which includes a milk line system (MLS), connectable to a collecting means, and is adapted to deliver milk that has been withdrawn from animals to a milk storage means (250). The milking plant also includes milk storage valve means (100; 235, 240), arranged between the milk line system (MLS) and the milk storage means (250). The valve means (240) are selectively adjustable to prevent fluid communication between the milk line system (MLS) and the milk storage means (250) during cleaning of the milk line system (MLS). Moreover, the valve means (100; 235, 240) are associated with a monitoring arrangement (275, EPS), which is adapted to determine an amount of leakage through the valve means (100; 235, 240) during the cleaning of the milk line system (MLS), and produce a valve health status signal (Sv) reflecting the amount of leakage. Hence, the functionality status of the valve means (100; 235, 240) may be qualitatively evaluated.

Abstract: A valve assembly comprises a flow control valve including a valve shaft, an electrical actuator comprising an actuator output shaft, and a torsion spring coupling the valve shaft and the actuator output shaft.

Abstract: A valve, in particular, a proportional seat valve or gate valve, includes a valve housing (10) and at least three fluid connections (1, 2, 3) extending through the valve housing. A main piston (18) extends in the valve housing (10). A pilot piston (24) for executing a pilot control (26) may be controlled by a current-carrying magnetic device (28). During an open pilot control (26), fluid from one (2) of the connectors (1, 2), controlled by the main piston (18), reaches the connector (3), controlled by the pilot piston (24), by a cross-sectional narrowing (38) in the main piston (19). The pilot control (26) and, as a result of the corresponding pressure drop, the main piston (18) achieves a control position, controlling both fluid connections (1, 2) with regard to fluid amount.

Abstract: This disclosure teaches a magnet valve, having a valve insert and a tappet which is guided movably via a tappet guide in the valve insert and which is braced via a restoring spring on a valve body, and the restoring spring acts between a first contact face of the tappet and a second contact face on the valve body. According to the invention, fixation means which define a position of the restoring spring relative to the tappet and the valve body are disposed on the second contact face of the valve body.

Abstract: A reciprocating engine (10) operating on the two stroke cycle, comprising a pair of stationary and substantially concentrically aligned mutually opposed pistons (13, 15) and a sleeve (11) adapted to reciprocate about these static pistons. The reciprocating sleeve (11) defining two cavities, each cavity being operatively connected to one of the pistons to define a chamber. The first chamber being a pre-charge chamber (21) and having at least one inlet port (25), and the second chamber being a combustion chamber (19) and having at least one outlet port (35), the two chambers being separated by a pressure operated transfer valve (23). The reciprocating motion of the sleeve (11) can be converted into rotary motion.

Abstract: A valve holding member made of a sheet metal includes a hub part (33) having a guide hole (34) through which a valve stem (23) and a plurality of arm parts (32) formed at the peripheral edge of the hub part. The arm parts are extend from the peripheral edge in an axial direction and in a radially outward direction with respect to the axis of the valve stem. The valve holding member also includes any one of a first reinforcing protrusion (35) formed in at least one of the arm parts which extends along a longitudinal direction of the at least one arm part and protrudes radially outward or inward with respect to the axis of the valve stem, a tubular reinforcing part (35c, 35e) formed around the guide hole and extending from the hub part in the axial direction, and a second reinforcing protrusion (35b) formed in the hub part and protruding in the axial direction.