Abstract: A valve unit for a hermetic reciprocating compressor comprises a valve plate adapted to be attached to the end of a piston cylinder. A discharge passage is formed through the valve plate, and a valve assembly is mounted within a stepped recess formed in an outer side of the valve plate for opening and closing the discharge passage. The outlet end of the discharge passage is situated within the recess and is spaced inwardly from the outer side so that the length, and hence the volume, of the discharge passage is reduced. Hence, the amount of compressed gas remaining in the discharge passage at the end of a piston stroke is correspondingly reduced, so that a vacuum can be formed in the piston chamber more quickly as the piston is retracted.

Abstract: A gasket has a retainer element integrally formed therewith for a reed valve. The retainer element is defined by one or two pairs of contour lines or by a pair of geometrically combined contour lines, and these contour lines are arranged such that no contour line will act as if it were a hinge when the retainer element is subjected to a deformation force thereof, and thus the retainer element is able to sufficiently withstand a deformation force exerted thereon.

Abstract: The valve unit includes a valve plate fitted to a head end of the cylinder of the compressor and having a valve-controlled intake part and an exhaust port surrounded by an annular seat formed in an opposite face of the plate from that which faces the cylinder, an exhaust valve reed associated with the seat, and a limit device fixed to the plate for limiting the travel of the exhaust reed. The exhaust reed includes a base portion which is restrained on the plate, an obturating head portion spaced from the base portion and cooperating with the seat, and an elongate portion connected the base and head portions. The connecting portion is "L"-shaped in plan with the head portion situated at the end of the leg of the "L" and the base portion situated at the end of the foot of the "L". The foot of the "L" is free to bend with the leg of the "L".

Abstract: A cantilever leaf spring (1) attached to a fixed frame or movable member of a gas isolator is acted on by a bias spring (2) and an additional similar, but not identical, bias spring (12).

Abstract: An outlet valve for rotary rolling piston compressor, the piston being assembled within a cylinder block having an attached end wall provided with gas discharge passage whose outlet end defines an annular valve seat placed in an oblong recess area circumscribing the valve seat within which a valve blade is located, the area between the bottom wall with the circumscribing side wall of the oblong recess and/or with the peripheral wall of the valve seat being curved to reduce the turbulence of gas leaving the outlet of the discharge passage.

Abstract: The valve assembly comprises a body formed of substantially identical, or identical plates, in which one is the mirror-image or reverse of the other. The plates are held apart, in parallel planes, by an enveloping seal. Each plate is ported for the conduct of fluid therethrough in cooperation with a fluid-conducting void formed in the confronting plate. Flapper-type valving elements are confined within the body, between the plates. A single, centrally-disposed fastener secures the plates and the assembly together, and constitutes the means for the simple disassembly of the unit.

Abstract: A reed valve for a passage defined by an inner surface in an engine comprises a cage mounted across the passage. The cage has a cage port, an upstream side and a downstream side. The read valve includes a flexible petal having a fixed portion connected to the cage enabling the petal to flex away from the cage in a cantilevered manner. The petal overlies the cage port to allow fluid flow therethrough from the upstream side to the downstream side by flexing away from the cage, and to obstruct fluid back-flow in the reverse direction by seating against the cage. The read valve further comprises an inflatable member adjoining a portion of the petal which flexes away from the cage. The petal is sandwiched between the inflatable member and cage so that inflation of the inflatable member obstructs the flexing of the petal away from the cage to reduce the effective length of the petal.

Abstract: A reed valve for a hermetic compressor having a case housing a cylinder and a piston movable therein with compression and suction chambers being defined in conjunction with the piston and an end plate provided with a refrigerating fluid passage hole defining with its outlet end a seat on which the flexible blade of a valve is seatable. The passage hole outlet end is in a spaced plane in relation to a parallel plane on the end plate to which the blade basic portion is attached with the blade, when not elastically deformed, lying in a sloped plane in relation to the plane containing the passage hole outlet.

Abstract: A suction reed valve for a piston machine is provided with a port therethrough for increasing suction flow efficiency and thereby the volumetric efficiency of the machine. A stop is provided in conjunction with the added suction port in the valve to limit the lift and thereby the stress of the suction reed valve.

Abstract: Some precompression pumps currently used for spraying a liquid include a non-return valve formed by a gasket (3) held captive between the base of the pump body (1) and a sleeve (2). This non-return valve determines the extent to which the pump chamber (19) is isolated from or put into communication with a supply of liquid, as a function of whether the gasket (3) bears against the base of the pump body (1) or against the sleeve (2), closing a central hole through the pump body or being held off a central hole through the sleeve.

Abstract: A discharge valve assembly, comprising a reed valve and an overlying valve retainer, is cantilever mounted on the axially outer surfaces of cast iron main and outboard bearings of a rotary vane compressor. Each valve assembly includes a round mounting end having an off-center hole extending through the valve and retainer, and an opposite end associated with opening and closing a discharge port extending through the bearing. The mounting end fits within a counterbore on the outer bearing surface and is retained therein by means of a rivet or the like through the off-center hole. The valve assembly is prevented from rotating about the rivet by the sidewall of the counterbore to maintain proper orientation of the valve and retainer so that they precisely cover the discharge port.

Abstract: A biflow filter drier has a pair of flapper-type check valve assemblies for directing fluid flow unidirectionally through a centrally supported molded desiccant core. Each check valve assembly is a three part structure spot welded into a unitary assembly comprising a centering support plate, a core support cup and an intermediate flapper valve plate. Two flapper valves are formed from the valve plate and comprise the check valves covering valve openings in the suport plate and support cup. The material which formed the central opening in the support plate is bent at an angle to the support plate and provides an overtravel stop for the check valve. An angled surface of the core support cup provides an overtravel stop for the second check valve.

Abstract: Noise is caused in a piston type compressor having a valve assembly including reed valves (13F, 14F) and a valve plate (10F) when the reed valves close and strike against the valve plate. The present invention provides a piston type compressor having a valve assembly including an elastic member (21F) and a thin valve sheet (20F) between the valve plate (10F) and the reed valves (14F), so that a shock caused by the reed valves striking the valve plate is absorbed, and the elastic member is protected by the thin valve sheet from damage usually caused by the striking thereof by the reed valves.

Abstract: A reed valve for a two cycle internal combustion engine. The engine has a metal crankcase to which the valve body of the reed valve is mounted. The valve body is made of an insulating material. A flat metal seat plate is fixed to the valve body. The seat plate has a flat seat not liable to be distorted by heat. A metal reed plate is fixed to the seat plate with its free end overhanging the flat seat. The seat on the seat plate is less liable to be distorted by heat than would be a similar seat formed as part of an insulating valve body.

Abstract: Reed valve means in which a valve plate is held at one end by a valve seat member of a resilient material and an open-position regulating member of a resilient material, and the interior of a fluid flow port is formed in complementary to the configuration of said reed valve means so that the reed valve means are held press-fitted against the interior of said fluid flow passage.

Abstract: A multi-piston swash plate type compressor for an air-conditioning system used in a vehicle such as an automobile, including a cylinder block body having a swash plate chamber formed therein for receiving a swash plate and cylinder bores formed therein for receiving pistons which are reciprocated by rotation of the swash plate. The compressor has a suction chamber which is fed with a refrigerant including lubricating oil from an evaporator of the air-conditioning system and a discharge chamber which feeds the compressed refrigerant to a condenser of the air-conditioning system. When the compressed refrigerant is discharged from the cylinder bore into the discharge chamber through a discharge reed valve, all of the discharged refrigerant is impinged on the peripheral and inner wall so as to separate the lubricating oil from the refrigerant, whereby an effective damping and sealing oil layer is formed between the discharge reed valve and the valve seat thereof.

Abstract: A stop apparatus for a plate valve of a fluid compressor is provided. The stop apparatus is equipped with a wear-resistant insert so that the wear on some compressor components can be reduced.

Abstract: A piston and cylinder arrangement, which includes a piston and piston rod assembly and which is filled with a damper-fluid, is attached to an auxiliary tank by a flow channel. A first restriction in the piston and piston rod assembly substantially controls the low velocity flow of the damper fluid during extension strokes and a second restriction in the piston and piston rod assembly substantially controls high velocity flow of the damper fluid during the extension strokes. A third restriction in the flow channel substantially controls the low velocity flow of the damper-fluid during compression strokes, and a fourth restriction in the flow channel substantially controls the high velocity flow of the damper-fluid during the compression strokes. Substantially unrestricted flow of the damper-fluid through the piston and piston rod assembly is permitted during the compression strokes, and substantially unrestricted flow of the damper-fluid through the flow channel is permitted during extension strokes.

Abstract: A reciprocatory piston type compressor having a cylinder block in which a plurality of compression chambers permit a plurality of reciprocatory pistons to be reciprocated so as to compress a refrigerant gas drawn from a suction chamber formed in an end housing into the compression chambers through suction ports of a valve plate, opened and closed by a suction valve mechanism with a plurality of resilient radial suction valves having a free end thereof, respectively, and surrounded by cutoff slots formed in a suction valve sheet, and to discharge the compressed refrigerant gas from the compression chambers into a discharge chamber formed in the end housing through discharge ports of the valve plate, opened and closed by resilient discharge valves.

Abstract: A return air barrier for a system for venitilation of the passenger compartment of a motor vehicle has a closure flap made of a flexible low-density material suspended, and resting by its own weight against an inclined grid in the housing of the return air barrier, and during air flow moves against the direction of outflow into the closed position. Above the closure flap within its range of travel thereof, there are several hook-like webs mounted in such a way that at the height at which flapping begins, the flap touches the free end of at least one web and, with increasing air velocity, buckles in the lower edge region, adheres snugly to the webs and is held in an angular form.

Abstract: A refrigerant gas compressor having a compression chamber in a cylinder block, a suction and a discharge chamber in a cylinder head, a suction and a discharge port provided in a valve plate for fluid communication between the compression chamber and the suction and discharge chambers in response to the opening and closing of flapper type suction and discharge valves attached to the valve plate, the suction and/or discharge valve port having a non-circular opening configuration divergently spreading from one narrow end to the opposite wide end in reverse proportion to the amount of upward movement of the suction and/or discharge valve from the face of the valve plate.

Abstract: A reed valve device for a 2-cycle engine includes a valve housing having several ports extending thereinto from a surface thereof. Several reed valves each have one end secured to the housing and can move between a position spaced from the surface and a position disposed against the surface and obstructing a respective port. Two main shafts are rotatably supported on the housing, and are coupled for synchronous rotation by a gear plate arrangement. Each main shaft has thereon a stopper which can move between positions engaging and spaced from the reed valve in response to rotational movement of the associated shaft, engagement of a stopper and a reed valve effecting an increase in a spring constant of the reed valve. When the engine exceeds a predetermined speed, a motor rotates the shafts to move the stoppers into engagement with the reed valves.

Abstract: A piston type compressor having a cylinder block in which a plurality of compression chambers permit a plurality of pistons to be reciprocated so as to compress a refrigerant sucked from a suction chamber formed in an end housing into the compression chambers through suction ports of a valve plate openably closed by a plurality of suction reed valves. The compressor also has a valve stop construction for stopping the movement of the suction reed valves when the valves reach the opening position thereof apart from the valve plate. The valve stop construction includes recessed seats formed in an axial end face of the cylinder block so as to permit a portion of the free end of respective suction reed valves to be first seated on the recessed seats, and to permit the remaining portion of the free end of the suction reed valves to be stably seated on the recessed seats. The gradual stoppage of the suction reed valves suppresses vibration of the valves and prevents noise.

Abstract: A rotary compressor includes a compression section disposed in a case. The compression section has a cylinder and first and second bearings fixed on both sides of the cylinder to define a compression chamber together with the cylinder. A first discharge mechanism for discharging a fluid compressed in the compression chamber into the outside of the chamber is provided at the first bearing. A second discharge mechanism for discharging a fluid compressed in the compression chamber into the outside of the chamber is provided at the second bearing. The first mechanism has a first discharge port formed in the first bearing and a first discharge valve for opening and closing the first port. The second mechanism has a second discharge port formed in the second bearing and a second discharge valve for opening and closing the second port with a different frequency from that of the first valve.

Abstract: A hermetic refrigeration compressor has a flat valve plate closing off a cylinder bore. The valve plate has an elongated recess on the outer side around the discharge port and a discharge valve assembly, comprising a flat reed valve and backing spring, fits within the recess beneath an overlying valve stop which engages the bottom of the recess at each end. The recess, the reed valve, the backing spring, and the valve stop are so configured that they can be assembled only in the correct configuration. The valve stop is held in place by an arcuate retaining spring having ends engaging notches in the valve plate and a projecting boss on a cylinder head defining a discharge valve plenum engages the retaining spring to press the spring and the valve plate into position within the recess to retain all of the parts in operating position.

Abstract: A compressor has a hermetic shell defining a compression chamber for compressing a fluid such as refrigerant gas supplied therein. The compressed gas is discharged from the compression chamber through a discharge port. A valve arrangement is provided at the discharge port for permitting the flow of the gas only in one direction from the inside to the outside of the compression chamber. The valve arrangement comprises first and second resilient elongated plates each having first and second ends. The first ends of the first and second elongated plates are rigidly connected to the hermetic shell and the second ends are placed one on top of the other over the discharge port. The second end of the first elongated plate on the discharged port is formed with at least one opening so that the pressurized gas discharged from the discharge port hits partly on the first plate and partly on the second plate through the opening.

Abstract: A cylinder has at least one valve seating surface-forming portion which has an outer surface formed therein with at least one recess, the bottom surface of which serves as a valve seating surface. A discharge valve is arranged on the valve seating surface-forming portion to close or open outlet holes each formed in corresponding ones of the valve seating surface. The discharge valve has at least one valve body formed of an elastic plate member disposed in close contact with a corresponding one of the valve seating surface. Preferably, the valve seating surface is arcuately concavely curved and the corresponding valve body has a correspondingly curved surface. The outlet holes are each formed in a thinnest portion of the valve seating surface-forming portion.

Abstract: A suction valve for a small refrigeration compressor is in the form of a thin sheet metal reed having a sealing portion adapted to make sealing contact with a valve seat around the suction port on a valve plate. The valve reed is formed from a valve sheet by an outline defining cut so that the valve reed is integral with the sheet. The valve reed has a reduced width neck portion and in this neck portion the material is plastically deformed along a bend line so that in a normal unstressed condition the sealing portion of the reed is spaced away from the valve seat by a slight distance and as soon as the piston starts on the compression stroke the fluid pressure forces the sealing portion into sealing engagement to prevent back-flow through the suction port. When the piston starts the suction stroke, the biasing of the valve reed causes the sealing portion to move out of engagement with the valve seat before there is a substantial pressure differential across the suction valve.

Abstract: A mouthpiece for the inlet tube of a spirometer is formed to engage the inlet end of the tube and has a radially extending part or parts for preventing reverse fitting. An apertured valve seating has a valve diaphragm of flexible material for obstructing the return flow of air to the patient's mouth. The seating may have a projecting rim for engagement with the peripheral region of the diaphragm, and the diaphragm is preferably mounted so that it is planar on first engagement therewith. A ring may be arranged to be contacted by the diaphragm after initial bulging by back-pressure. Further deformation of the diaphragm is thereby controlled so that its peripheral region remains in engagement with the rim.

Abstract: A reed valve assembly comprising a valve member having a valve opening therein, a resilient valve seat member having an end and an opening registering with the valve opening and defining a valve seat surrounding the valve opening, a reed valve having an end, and a screw securing the ends of the reed valve and of the valve seat member to the valve member with the valve seat member secured between the reed valve and the valve member and with the reed valve movable into and out of engagement with the valve seat member to respectively close and open the valve opening.

Abstract: A flow device including a plurality of flow channels which converge in a common housing containing a pre-biased flow control diaphragm at the position of convergence of at least two channels. The control diaphragm is pre-biased by a set of prongs which extend from an integral portion of the common housing.

Abstract: A reed valve includes a reed member fixed to a valve body and a stopper member which is fixed at one end thereof to the valve body together with the reed member. The stopper member is constituted by a flat plate-shaped member which is curved outwardly from the one end to its free end, and a lump member which is secured to the surface of the flat plate-shaped member on the side thereof which is remote from the reed member. The lump member has a shape which is substantially coincident with the shape of a space which is formed on the downstream side of the reed valve and does not virtually take part in the flow of intake. The lump member is disposed within the space.

Abstract: A discharging valve device for a compressor discharges gas compressed in a compression chamber outside said chamber against an urging force of a discharging valve to a valve seat and resistance of breaking a film of a lubricating oil deposited at and near a cacting area formed between the valve seat and the discharging valve.

Abstract: A pressure relief valve particularly suitable for fluid compressors includes a valve seat and a flexible valve closure element cooperating therewith. The closure element, formed from a single sheet of spring steel or similar flexible material, includes a planar portion normally overlying the valve seat to keep the valve closed, and a pair of flexible arms joined at one edge of the planar portion and extending around either side of the planar portion and beyond the opposite edge. In position, the remote ends of the arms are fastened to the supporting structure in a plane common with the valve seat, with the planar portion overlaying the valve seat and closing the valve orifice.

Abstract: A pressure valve for a compressor of the hermetically encapsulated type. The valve includes a valve plate with a valve seat and upstanding pins on which at least one catch plate is placed to limit the stroke of a closing member formed by a valve leaf spring. The valve seat is disposed in an elongated depression of the valve plate and the pins are formed on an insert spring into the recess.

Abstract: A variable delivery compressor having therein a plurality of compression chambers is adapted for compressing a refrigerant gas of a cooling circuit. The compressor has a first delivery chamber communicating with the compression chambers by way of a fixedly arranged valve and a second delivery chamber communicating with the compression chambers by way of a movably arranged delivery valve. This movable valve is formed to include a base portion, a plurality of reed portions formed to radially extend from the outer circumference of the base portion and arranged to face delivery ports, and at least one protrusion formed to radially extend from the outer circumference of the base portion for suppressing the warp of the base portion.

Abstract: A liquid flow control servo valve where the flow controlling element is a magnetically loaded hydrostatic step bearing. An electromagnet has a central liquid passage 3 through it, and flow from this passage 3 is closed off by a magnetically permeable flat plate which has a planar surface matching a corresponding planar surface of the electromagnet. Pressure from passage 3 floats the plate on a thin liquid film in the manner of a hydrostatic step bearing, and the film thickness of this liquid film rapidly adjusts until the hydrostatic bearing pressure force W balances the magnetic forces on the plate. This variation in film thickness adjusts flow rate past the plate. The flow and pressure drop across the hydrostatic bearing plate rapidly adjusts to coil current in the low hysteresis electromagnet, so that P across the plate varies nearly in proportion to coil current I.

Abstract: A leaf spring diffuser for use in an aeration tank of a water treatment system. An amplitude-limiting stop is mounted on each vibrating extremity of the diffuser leaf spring to project into the diffuser air chamber. Each stop engages the diffuser body to prevent the leaf spring from being subjected to an excess bending moment which would otherwise deform the leaf spring and promote clogging of the diffuser parts.

Abstract: The present invention is with respect to an overpressure valve for packages with flexible walls, having a valve body able to be fluid-tightly joined with such a package. The valve body has a flat valve seat having thereon a diaphragm with a valve shutting part. In the seat there are valve openings, each having a number of concentric ring-like channels round it in the seat. The concentric channels take up a sealant, more specially silicone oil. The diaphragm is made of a single piece of material running on one side of the walls to the other without any holes therein. It is only kept in position in a middle part of the valve seat so that the diaphragm may be moved freely, at least over the valve openings. In the case of a preferred form of the invention, the diaphragm is slipped loosely into the valve body in which it is kept in position by a keeper in a middle part thereof. The keeper may be fixed in position by friction or by a keying effect.

Abstract: A rotary compressor having a discharge check valve and a retainer assembly in which the valve is a reed type valve mounted on the retainer and the retainer having spaced locating projections for positioning the assembly in a valve chamber. The retainer has a projection dimensioned to engage between the retainer main body portion and one wall of the valve chamber to create a continuous radius free from flat spots for the valve to engage in its open position.

Abstract: This present invention pertains to a flap valve particularly used with and in chemical pumps. This valve is spring-biased to and toward a port formed in a wall of the pump. The valve includes a laminate structure at the hinge area which provides alternate Teflon and corrosion resistant, bright sheet stainless steel riveted together with front and back facing portions also of Telfon. The laminated portion has extending portions of each laminate member and in each of these portions are formed elongated apertures that are aligned to provide vertically elongated slotted holes sized to slide on the shanks of studs mounted in the wall of the pump. The extending portion of the laminate is mounted with front and back spacer members so that the laminate portion is spaced from the wall about the extent of the front facing portion.

Abstract: In a discharge valve apparatus, a discharge port on a valve plate covered by a long thin discharge valve is formed in a elliptic shape as horizontal view whereby stress of the long thin discharge valve in longitudinal direction at its center is decreased and the fatigue strength of the valve is improved and reliability is high and the apparatus can be easily manufactured and the efficiency of the compressor is increased.

Abstract: In a reed valve of the type having a base formed with one or more apertures through which flows a fluid, a shock absorbing seat attached to the upper surface of the base so as to surround the one or more apertures at the inner peripheral edge thereof, and a reed having one end securely fixed to the base, whereby the reed is forced to move to seat on the seat, thereby closing the one or more apertures and to move away therefrom, thereby opening the one or more apertures, at least a portion of the inner peripheral edge of the seat which engages with the free end portion of the reed is spaced outwardly away from the upper edge of the aperture by a suitable distance and is beveled or curved.

Abstract: A rotary compressor includes a casing 1 having a curved rotor chamber 2 in which is mounted a rotor 6. The compressor has an outlet valve 10 consisting of two valve units 10a, 10b which are located on inclined support surfaces 12 and outlet passages 11 from the chamber 2 open into the surfaces 12. Each valve unit 10a, 10b consists of a valve seat 15, a valve plate 13 and a limit plate 14, the valve seat 15 having apertures which register with passages 11 and the valve plate 13 having apertures which are staggered from the apertures in the valve seat 15. The support surfaces 12 are positioned close to the chamber 2 so that the length of the passages is small and the "dead volume" between the chamber 2 and the valve plate 13 is reduced.

Abstract: A cylinder primary air filter element is coaxially disposed within a cylindrical shell between an air intake pipe and an outlet provided in the shell. A resilient secondary air filter element is deformably secured in an opening formed in a sidewall of the shell so as to be located outside the outer periphery of the primary air filter. The secondary filter element is secured in place by a filter element retaining plate which is arcuately shaped so as to be concentric with the primary filter element and is readily detachably attached to the shell. A sufficiently enlarged air flow passageway is thus defined between the outer periphery of the primary air filter element and the filter element retaining plate and consequently the resistance encountered by the air flowing through this passageway may be considerably reduced and the excessive bulging of the air cleaner may be avoided. A reed valve assembly is connected to the outlet of a housing which surrounds the secondary filter element.

Abstract: A sparger for efficient liberation of air when submerged in a body of liquid comprises a pressure-opened closure biased upwardly to constrict the discharge of air under a rigid annular seat member. Air is thus discharged at an exactly predetermined and constant level. When air is supplied to the interior of the sparger at the lowest volume of flow likely to be desired, it overcomes the bias of the closure and opens the closure, equalizing means ensuring uniform distribution. With different forms, the uniform distribution may be at all points around the periphery of the seat, at selected points, only, or at selected points when the air flow is low, and all around the periphery at high volume. The bias toward closed position may be supplied by the resiliency of the valve, or by buoyancy action, or both. A predetermined back pressure substantially constant through all flow rates can be provided by using buoyancy alone. The equalizing means may be a parallel-movement mounting or movement limiting means.

Abstract: A compressor discharge valve assembly utilizing a cylindrical cavity in which is provided a discharge flow control valve and a valve stop for limiting the opening movement of the valve during operation of the compressor. The discharge valve chamber defines a cylindrical portion into which opens an outlet from the compression chamber. A cylindrical recess is provided in the wall of the discharge valve chamber for receiving a securing portion of the valve stop. The valve stop may further include a spacer for maintaining an arcuate backup portion thereof in inwardly spaced relationship to the valve. The valve is biased to engage the discharge valve chamber wall adjacent the outlet passage. The valve may be defined by a resilient arcuate member secured at one end to the valve stop whereby the valve is cantilevered from the securing means to extend over an arc of approximately 180.degree. to have a distal portion disposed in closing relationship to the outlet passage.

Abstract: Disclosed herein is a reed valve comprising a reed plate having apertures therein defining a first port and a second port together with seats respectively extending along the periphery of each of the ports. The reed valve also includes a first reed member having a first port closing portion and a second reed member having a second port closing portion. The reed members are mounted on the reed plate for respective movement of the first and second port closing portions relative to the first and second ports, which reed members have different natural frequencies when mounted on the reed plate.

Abstract: A reed valve assembly in which a gummous material coating is applied to the noise-propagating passageway of a secondary-air exhaust gas recombustion system for internal combustion engines.

Abstract: A pressure valve for a compressor of the hermetically encapsulated type. The valve includes a valve plate with a valve seat and upstanding pins on which at least one catch plate is placed to limit the stroke of a closing member formed by a valve leaf spring. The valve seat is disposed in an elongated depression of the valve plate and the pins are formed on an insert spring into the recess.