Abstract: An electromagnetic valve for controlling a passage for a flow of fluid or for a difference in the pressures between an inlet (48;56) and an outlet (56;48), comprises a body (10;16;46) on which is arranged a solenoid coil (22), a bore (26) in which is slideably mounted valve member (30) progressively displaceable in response to actuation of the solenoid coil (22) between a first position and a second position. The valve member (30) and the body (46) comprises cooperating valve surfaces (54;62) defining the passage. One valve surface (62) has in axial section a variable profile so that the area of the passage, in a radial section is a predetermined function of the intensity of the current applied to the solenoid coil (22).

Abstract: A carburetor and a fuel seeding system having the same including an air suction passageway through which air is fed, and a fuel feeding passageway which is disposed so as to be intersected to the air suction passageway and through which fuel is fed, the air suction passageway and the fuel feeding passageway being intercommunicated to each other. A roughened surface portion is formed on a wall surface of at least one of the air suction passageway and the fuel feeding passageway to generate turbulence in fluid flow and promote carburetion and granulation of the air-fuel mixture due to the turbulence. The tip portion of a jet needle serving as a part of the fuel feeding passageway may be provided with a substantially flat surface portion or a substantially conical surface portion having a vertical angle above 145 degrees.

Abstract: A pressure control valve is provided comprising an inlet bore, an annular channel and a control spool. So as to obtain a low control deviation and good stability an annular channel is provided at the outlet side of the valve. The axial extension of said annular channel is smaller than the outlet flow area formed by said bores.

Abstract: The invention is directed to a membrane carburetor for an internal combustion engine such as a two-stroke engine having an intake for drawing the mixture in by suction. The membrane carburetor has a venturi section wherein the mixture is formed. A main nozzle opening opens forward of a throttle flap and an idle nozzle opening opens rearward of the throttle flap both viewed in flow direction. Both openings are connected via channels to a fuel-filled control chamber to which fuel flows via an inflow channel. An inlet valve is mounted in the inflow channel and has a valve body disposed opposite a valve seat fixed in the housing. The inlet valve is actuated in the opening direction via a control lever by a control membrane delimiting the control chamber.

Abstract: A mud valve having a plug seat which is made of a resilient material, and which forms the seal at an angle of approximately 28.degree. from the vertical. The valve seat is formed with a matching 28.degree. inclination to mate with the resilient seat.

Abstract: A main steam isolation valve of a reactor power plant comprises a valve body provided with inlet and outlet portions through which a steam flows, a cylindrical valve disk accommodated in the valve body to be reciprocatingly movable therein along an inner peripheral surface of the valve body for opening and closing the steam flow inlet portion and a driving mechanism secured to the valve body and operatively connected to the valve disk for reciprocatingly moving the valve disk in the valve body. A coupling member is applied to an end opening of the valve body for holding the valve disk when the valve disk is shifted to a position fully opening the inlet portion. A tubular wall member is integrally formed with the valve body so as to surround the valve disk with a gap therebetween when the valve disk is fully opened. A guide rib is further disposed to the valve body for causing asymmetric steam flow in the inlet portion of the steam flow of the valve body.

Abstract: A substantially cylindrical, plug-type configuration of the element offers a mass which is less responsive to non-uniform and unsteady pressures, and channeling therein opens centrally, and about the periphery thereof, onto a recess formed in an end of the element which closes onto a valve seat. The channeling and recess are cooperative to assure that the balance-end of the element will have average, representative pressures conducted thereto.

Abstract: A valve receptacle is disclosed, the valve providing a fluid seal when the valve is closed at atmospheric temperatures and at temperatures encountered as a result of exposure to cryogenic fluids. The valve receptacle comprises a valve receptacle housing; a seal piston disposed within the receptacle housing; a projecting flange of the seal piston engaging a seal inclined surface; and a seal piston guide comprising a first hollow cylinder and a second hollow cylinder interior of the first hollow cylinder, and a connecting member connecting the hollow cylinders. The piston rod is slidably moveable within the interior hollow cylinder. Abutment of a piston rod shoulder with the inner hollow cylinder limits the extent of lateral movement of the piston seal.

Abstract: A valve seat arrangement sealing against a valve core in a valve, particularly for a ball valve, having an inner ring with a first deflectable sealing lip and an outer ring with a second deflectable sealing lip. The first deflectable lip is arranged to protrude forwardly to make initial contact with a closing valve core and once deflected, the second lip is arranged to land against said closing valve core forming a secondary seal. The first sealing lip and the second sealing lip are fashioned having selectively angled beveled surfaces facing the core. The invention provides an effective sealing arrangement for high temperature service.

Abstract: A pressure relief valve selectively permitting fluid flow through the valve if the pressure on one side of the valve exceeds the pressure on the other side of the valve by a set amount, the pressure relief valve including a first valve member having a valve seat surface, and a movable valve member adapted to releasably engage the first valve member. The movable valve member includes a body portion having a periphery, the periphery having a downwardly extending annular flange engaging the valve seat surface. The downwardly extending annular flange includes a generally spherical valve surface adapted to provide a seal with the valve seat surface by engaging a resilient sealing ring on the valve seat surface. A flexible diaphragm causes movement of the movable valve member away from the valve seat when the pressure on the other side of the valve exceeds the pressure on the one side of the valve by a selected amount.

Abstract: A high-pressure control valve (2) used in chromatography serves as a counter pressure control valve which, in a separating column, is intended to maintain a specific predeterminable pressure. The valve has a valve seat (12) with an outlet channel opening (18) located in its center and a valve body (13) that cooperates with the valve seat. The valve body (13) can be moved with the aid of a piezo transducer, actively in the opening direction and, while being monitored, actively in the closing direction. The opposed faces of the valve seat (12) and the valve body (13) are so shaped that an annular gap (16) that widens radially towards the outside starting from the opening (18) of the outlet channel is produced. When the valve is in the closed position, this results in the formation of a narrow sealing zone directly at the edge of the opening of the outlet channel.

Abstract: A poppet-type valve unit having annular elastomeric poppet which cooperates with an annular valve seat. The exterior profile defined by a pair of generally frusto-conical surfaces which are disposed radially inwardly and outwardly with respect to one another. The inner frusto-conical surface extends at a steeper angle or slope relative to valve movement direction than does the outer frusto-conical surface, thereby defining a peak where the two frusto-conical surfaces meet. This peak substantially corresponds in diameter to the diameter of the valve seat. This increases the flow area between the poppet and valve seat when the poppet is opened.

Abstract: A recirculation valve for cooling a centrifugal pump. The invention comprises a valve casing having a first chamber for connection to a centrifugal pump and a second chamber for connection to a fluid outlet, a recirculation port for redirecting fluid from the first chamber to the centrifugal pump. Between the first and second chambers is a check valve means for permitting fluid flow from the first to the second chamber. Connected to the check valve means is a hollow cylindrical valve stem permitting flow from the first chamber to the second chamber. The check valve means is comprised of a circular disc which opens when the fluid pressure in the first chamber exceeds the fluid pressure in the second chamber and closes when the fluid pressure in the second chamber approaches that in the first and intermediate chambers. A two angle control surface between the check valve disc and the valve casing controls the position of the check valve relative to the flow of fluid past the valve.

Abstract: An improved mechanically actuated pilot valve is shown in which the output pressure from the valve is dependent upon a flapper position rather than upon force is applied to the flapper. The pilot valve has a valve body with a gas inlet chamber, a gas outlet chamber and an inner connecting gas passage for controlling the flow of gas through the valve. An improved poppet having primary and secondary sealing regions cooperates with a valve seat provided in the gas passage and with a hollow actuating stem which protrudes from the valve body to control the flow of control gas through the valve when the actuating stem is contacted by an external actuator, such as a flapper element.

Abstract: A proportional flow control valve in which a valve seat is provided in the proportional flow control valve body, a valve piece is slidably mounted on a movable iron core, and is urged toward the valve seat by an elastic member disposed between the valve piece and the movable iron core, and a holder is fixedly mounted on the movable iron core so as to limit the movement of the valve piece toward the valve seat caused by the elastic member. The proportional flow control valve is high in reliability in which the leakage of fluid is substantially zeroed even when fully closed, and the difficulties are eliminated that, when its flow rate adjusting means engages with or disengages from the valve seat, hammering sounds are produced and the flow characteristic is adversely affected, and which is simple in adjustment and is maintained correct in flow characteristic at all times.

Abstract: An electromagnetic diaphragm-type valve has a leakage preventing convex ring and is particularly applicable to air-aided fuel injection system. The valve includes an external housing made of a magnetic-inductive material, an electromagnetic coil set installed inside the rear part of external housing, a magnetic-inductive stator fitted to the central holding site of electromagnetic coil set, and a valve stem installed in the front part of external housing. The valve stem circumference is integrated with a deflectable rubber diaphragm so as not only to enable the valve stem to move a minor distance but also to enable the valve stem to be located in a right or left position. In addition, the diaphragm isolates an air chamber from parts defining the ranges of guidance and lift of valve stem, hence the motion of valve stem is not affected by entrance of pollutants. The diaphragm is formed to seal in compresed air in the air chamber.

Abstract: An electromagnetically actuated, quick-action hydraulic switching valve has a pressure-balanced seating valve arrangement and an electromagnetic actuator means. The electromagnetic actuator means comprises a core and an armature for actuating the valve, the core and the armature defining a working air gap. The armature is part of the core and is in the form of a sleeve member mounted slidably on a guide pin which is pressed in position in the housing. The seating valve arrangement is formed by an annular edge defined by a central bore in the armature on the one hand and on the other hand, either a taper surface on the guide pin or a ball with a bore therethrough. Using the same armature, the valve can be designed to operate either as a valve which is open in the currentless condition or as a valve which is closed in the currentless condition.

Abstract: A fluid flow control valve has a resilient diaphragm that engages a valve seat. A line contact is formed between the diaphragm and the valve seat at or closely adjacent the outer diameter of the valve seat. This enhances the ability of the valve to seal under low fluid pressures. The diaphragm is reinforced by a plastic reinforcing member which is formed separately from the diaphragm. The reinforcing member and the diaphragm are inserted together in a press fit, and barbed posts on the reinforcing member hold the two together.

Abstract: A longitudinally controllable adjustment device, in particular a gas spring partially filled with a fluid, has a piston disposed on a piston rod and a valve, inside of which a valve body is slidable in its longitudinal direction. It has a tapered section by which a seal, abutting on a sealing face, can be bridged. In order to make possible a long-stroke embodiment and a short-stroke embodiment, the seal has two sealing beads, of which the one sealing bead sealingly abuts in all embodiments against a truncated cone-like sealing face of the valve body, while the other sealing bead, if required, abuts on an optionally provided additional cylindrical sealing face between the truncated cone-like sealing face and the tapered section.

Abstract: An improved control shaft seal and air valve for a portable paint gun with the seal having a radial clearance with the shaft except at a shaft sealing surface of limited axial length. The shaft seal has a conical surface radially outward of the shaft sealing surface to provide a sealing surface and also to provide transfer of axial forces at that surface to a radial direction to provide a force to urge the shaft sealing surface against the control shaft. A second conical surface of the seal provides for retention of the seal on an air valve spring when the paint gun is disassembled. An improved air valve for portable paint guns is also disclosed having a rigid axial hub and radial support carrying a relatively flexible rim portion adapted to engage a tapered seating surface in the gun.

Abstract: A solenoid valve comprising a valve body, and a poppet vertically slidable within the valve body and moved to and from a valve seat so as to open and close an oil passage. The poppet is in the form of a cylindrical tube and is slidably fit around and supported by a guide rod in an oil-tight manner. The guide rod has a valve seat at its bottom and an oil passage for communication with the interior of the poppet. Features of the present invention are as follows. The guide rod has a surface on which the inner peripheral surface of the poppet is slidable. The outer diameter of such a surface of the guide rod is slightly smaller than that of the valve seat. In this way, the solenoid valve acts as an on-off valve and a relief valve. The valve of the type as thus far explained further includes a passage for reducing the flow velocity of an oil as pressurized between the poppet and the guide rod. A surface of the poppet is shaped to maintain an oil film between the poppet and the valve seat.

Abstract: A valve assembly, particularly a breather valve assembly for fluid storage tanks, is described. This assembly comprises a valve housing including a fluid conduit and a valve seat defining a fluid outlet of the fluid conduit, and a pressure pallet sized and adapted to move away from the valve seat in response to an increased fluid pressure in the fluid conduit. A seal is provided and acts to effectively seal the fluid outlet against fluid flow from said fluid conduit when the seal is in contact with the valve seat. The seal which includes first and second flexible seal elements which are unsecured to the pressure pallet at or near their respective outer peripheries, is structured so that fluid from the fluid conduit is in the space between the first and second seal elements when the seal means is in contact with the valve seat.

Abstract: An outlet valve for a high pressure pump which is designed to alleviate "sticking" of the moveable valve element. An annular recess is formed at a transitional flow area where high pressure fluid flows forwardly and then radially outwardly between contact surfaces of the valve element and a valve seat member. It is believed this alleviates a problem of separated flow at the transition area which would effectively decrease the flow area and cause a localized pressure reduction which would delay proper opening of the valve element. Also, other configurations are shown for tripping the boundary layer to avoid separation, and other configurations to alleviate the same.

Abstract: An isolation valve used in a single crystal pulling apparatus, having a frame (11), a vertical passageway for communication between a main chamber and an upper pull chamber of the single crystal pulling apparatus, a shaft (13) capable of turning about its axis and reciprocating vertically, a lever (20) for turning the shaft, a drive means (18) for reciprocating the shaft (13), an arm (14) fixed to the shaft (13), a circular shutter (15) held by the arm (14) for closing and opening the vertical passageway, and a flange (9) defining a hole which communicates the passageway with the main chamber, wherein a cylindrical cavity is made in the bottom of the circular shutter (15); the flange (9) has a circular raised rim (9b) extending upward whose outer diameter is slightly smaller than the diameter of the cylindrical cavity of the shutter; and an endless circular seal means (17) is embedded partially in either the external vertical wall of the raised rim (9b) of the flange or the internal vertical wall of the shutt

Abstract: A direct-operated, two-way solenoid valve is disclosed. The valve balances the hydraulic flow forces acting on a poppet in order to achieve fast-acting, high-flow operation. The valve has a housing with the poppet mounted in a main bore. The poppet has a sealing end with a longitudinal central bore that is open at the sealing end and terminates in a pressure wall. A radial cross bore in the poppet provides fluid communication between the central bore and an outlet port formed in the housing. The sealing end of the poppet may contact a valve seat to prevent fluid communication between an inlet port formed in the housing and the central bore of the poppet. The sealing end of the poppet is biased into contact with the valve seat to prevent fluid communication between the inlet port and the central bore. An actuator generating a magnetic flux path tends to move the poppet out of contact with the valve seat.

Abstract: A pneumatic oscillator especially useful for generating breathable gas pulses in a resuscitator and/or lung ventilator device has a reciprocable piston or equivalent controlling a poppet valve arrangement that includes a sealing lip coacting with a resilient facing. The sealing lip provides for sharp definition of a line of contact on the resilient facing and penetration of the latter by the lip is limited by stop means, preferably abutment(s) coacting with the facing adjacent to the line of contact with the sealing lip. This prevents wear and/or excessive indentation of the facing with consequent shift of the contact line and alteration of the oscillator characteristic with time.

Abstract: A compact, high response regulating valve has a solenoid modulated armature and plunger construction. The solenoid assembly and armature minimize magnetic flux leakage by maintaining the armature in close proximity to the induced magnetic field. In one embodiment, the lightweight armature has a number of holes to increase the speed at which it may be modulated. Mounted to the armature is a regulator plunger which controls fluid communication between the valve's inlet and outlet ports. Normally spring-biased closed, the plunger uses a line seal to maximize flow with minimal longitudinal plunger movement. Plunger response time is enhanced by eliminating elastomeric friction (i.e., eliminating O-rings and replacing them with a number of notches about the plunger periphery). A conical seat and bevelled plunger provide an effective line seal.

Abstract: The present invention relates to a valve and container provided with such a valve, which can be used with portable apparatus using fuel gas, normally operating with piercable cartridges. The valve according to the invention is characterized by the presence of a concave surface on the top of the axial boss of the cup. The corresponding transverse seal assumes the same concave shape as the top of the boss.

Abstract: In a valve having first and second poppet members which control the flow of fluid from an entrance port to an outlet port. The valve has a cylindrical body with a center bore through which fluid from the second poppet member flows and is thereafter combined with the external fluid flow controlled by the first poppet member. A sleeve which forms a part of the second poppet member is concentric to the cylindrical body. The sleeve has a flange that is located in a groove on the peripheral surface of the cylindrical body. A flexible member is located in the groove and acts on the flange to urge the sleeve toward a stop. The cylindrical body is connected to an actuation member for moving the first and second poppet members with respect to corresponding first and second seats and allowing fluid to flow from the entrance port to the outlet port.

Abstract: An adjustable pressure relief valve is disclosed comprising a valve body having an inlet and an outlet, a spherical valve seat associated with the inlet, a valve member having a mating spherical sealing surface configured to seal off the flow of fluids through the valve at the valve seat, a huddling chamber around the periphery of the mating spherical sealing surface, an adjustment screw supported in the valve body to allow rotational but not longitudinal movement of the adjustment screw with respect to the valve body, a compression member connected to the adjustment screw and mounted within the valve body which moves longitudinally with respect to the adjustment screw when the adjustment screw is rotated and a resilient member biased between the compression member and the valve member. In the preferred embodiment, the mating spherical sealing surface is provided by staking a spherical ball inside a cavity in the valve member, leaving portion of the ball exposed.

Abstract: A valve body includes a cylindrical seat having a substantially flat working face. A cylindrical valve member having a working surface thereon is slidable toward and away from the seat face to vary flow from the outer peripheries of the seat and valve member into an orifice extending into the seat and in communication with the seat face. The valve member is mounted on a stem which is in threaded engagement with the radially inner surface of an annular member. The outer surface of the annular member is in threaded engagement with the valve body. The inner threads have 12 threads per inch and the outer threads have 11 threads per inch thereby moving the valve stem 0.0075 inches per 360.degree. revolution of the annular member.

Abstract: The invention relates to a safety chock valve having improved body top. An upper part of the valve body has a tapered wall cavity which receives in a sealed engagement a tapered lower part of the valve bonnet. An internally threaded cap member secures sealed position of the bonnet on the valve body. Even partial disengagement of the threads causes breaking of the sealed engagement and escape of pressure between the valve body and the bonnet.

Abstract: In a disc-type stop valve, a valve disc located at the lower end of a rotatable valve stem takes the form of a solid cylindrical metal member having an annular groove formed around the periphery of its lower surface in which an annular resiliently deformable plastic seal ring is disposed. The seal ring is held in place by a smaller-diameter circular metal retainer plate which is secured by bolts against the lower surface of the valve disc and against the underside of seal ring. When the valve is closed, a circumferential lower edge of the seal ring bears against a conically-shaped annular metal valve seat surface in the valve body. A large-diameter resilient compressible conventional O-ring is disposed in an annular space defined by the rear side of the retainer plate, the annular inner edge of the seal ring and a chamfered edge along the intersection of the lower surface and the side edge of the valve disc.

Abstract: Disclosed is a micro gas flow rate control valve which is used in semi-conductor producing system operated under a high vacuum or various apparatus for analysis. The valve uses combination of a flat surface valve tip and a flat surface valve seat of cylindrical shape, and is capable of controlling minute flow and durable even used under severe conditions of high pressure differences and large temperature changes to have stable performance. Also enclosed is a metal-ceramics sealing mechanism suitable for the above valve. The sealing mechanism uses, in addition to a sealing member made of a soft metal, a seal assisting member, and durable under the conditions of repeated temperature changes.

Abstract: Valve assemblies having a valve seat with a conical surface for causing an included O-ring to roll upon and wedge against the conical surface for closing the port when a spherical valve member is forced against the O-ring.

Abstract: The assembly, mounted on a piston rod, is constructed as a piston body (1) having a cylindrical skirt and oil passages (4a) between the skirt and a cylindrical core (3) for fastening to the piston rod, and a double-acting floating valve in the form of an annular plate mounted with a specific prestress between a bearing zone (8) of the cylindrical skirt of the piston body (1) on the outside and a bearing member on the inside. The outer part of the bearing zone of the cylindrical skirt is cut in such a way that the bearing surface (8) is different from a surface contained between two circles concentric relative to the axis of the piston body (1), for example delimited by a polygon with concave sides (19), so that the change from laminar flow to turbulent flow during a rapid compression movement does not take place simultaneously over the entire circumference of the divergent oil stream.

Abstract: A fluid control valve used in a flow controller has an actuator for controlling the spacing of a valve seat that cooperates with a surface surrounding an orifice in a valve body. The actuator is modulated to regulate the spacing of the seat from the valve body orifice to control flow through the orifice, and to create a seal when desired. The valve seat has a thin metallic sealing disc, compatible with the fluid being controlled that is supported with a fluid, preferably a substantially incompressible fluid, such as a silicon oil, so the disc can conform to surface irregularities and misalignments of the mating surface. The fluid filling will displace or compress to permit the sealing disc to conform to the seat and effect a seal at relatively low valve forces.

Abstract: A slow acting pneumatically operated valve which uses gas pressure and/or pneumatic pressure acting on a diaphragm to counteract the force of a coiled spring, thereby activating a double tapered fluorocarbon plastic poppet against a fluorocarbon plastic valve seat. Actuation of the poppet must be extremely slow and uniform such that fluid in the affected supply line does not experience shocks which can be transmitted to other supply line components. Actuation speed is restricted by use of a damping piston attached to the opposite end of the poppet stem, which restricts the flow of hydraulic fluid to opposite sides of the piston chamber during an actuation cycle. The double taper poppet incorporates an extremely low angle of incidence to the valve seat. Valve opening increases very slowly during the initial opening travel and decreases slowly during final closing travel, thereby further reducing the potential for fluid system shocks.

Abstract: An antiskid apparatus for an automotive vehicle including a cut-off valve having an inlet side to which a master cylinder is connected and an outlet side to which a wheel cylinder is connected for cutting off a supply of pressurized oil from the master cylinder to the wheel cylinder when an antiskid operation is performed, and a pump connected between the cut-off valve and wheel cylinder for supplying pressurized oil to the wheel cylinder when an antiskid operation is performed. The master cylinder and wheel cylinder being brought into slight communication via a microgroove in the spool of the cut-off valve when the spool is at a closed position. Pedal shock at antiskid operation is alleviated.

Abstract: Valve assemblies having valve seats and/or valve members with conical surfaces which cause an included O-ring to roll upon and wedge between the valve member and the seat for reliably closing the valve.

Abstract: An improved compression type valve for a fire hydrant or the like includes an improved resilient valve member for sealingly engaging a seating ring in order to control the passage of fluid through the valve. The improved valve member is provided with a first bevel extending from a side surface thereof toward the top surface of the valve member, and with a second bevel which extends from the first bevel to the top surface. The second bevel prevents pressure which is applied to the valve element from causing the top surface of the valve element to deform around its circumference and break off, as was the case with prior art valve members of this type.

Abstract: An apparatus T.sub.1 for sealing a well tubing 12 including a housing 20, 21, 22 which has a channel 68 communicating with the bore of tubing 12 and a chamber 43 connected with channel 68. A seal 62 is slidably mounted in the housing and is disposed in a retracted open condition in chamber 43 to enable fluid flow through channel 68. AN actuator 41, 42 also disposed in chamber 43, includes a shape memory alloy material which is responsive to the temperature thereof rising to a predetermined level corresponding to the transition temperature of the shape memory alloy for transforming in shape to extend the seal into an extended condition within channel 68, thereby blocking fluid flow therethrough.

Abstract: Liquid flow through a passage (9) in a body member (7) is controlled by a relatively movable poppet valve member (8). A frusto-conical first guide surface (11) on the poppet valve (8) merges smoothly with a second guide surface (12 and 13) which, in cross-section, has part-circulr portion (12) and an outlet end (13). Liquid passing through an aperture (10) between the body member (7) and the poppet valve member (8) flows along the first guide surface (11) and the second guide surface (12 and 13) and adopts a toroidal vortex flow pattern and this controls the collapse of those bubbles which form as a result of cavitation so as to diminish audible and inaudible vibrations.

Abstract: In order to be able to manage with minimum switching force, one of the respective sealing regions on the switching member or valve body of a two-position seat valve is made in the form of a circular sharp edge of small cross-sectional edge radius, thus requiring only a very small force for keeping the valve tight. In particular, in combination with a pressure equalizing construction, this enables very low control energy to undergo maximum amplification.

Abstract: A valve assembly for use in a sprinkler head comprising a valve seat having a generally frusto-conical surface configuration and an annular rib, a flanged valve member in sealing engagement with said annular rib and having a depending, radially inwardly spaced surface which in cooperation with said annular rib and surface configuration forms a partially enclosed space in which a resilient O-ring is captively held in compressive engagement between the valve seat and valve member.

Abstract: The present invention relates to an arrangement (1) for a valve assembly which acts with a movable valve body (4), such as a piston, for the purpose of feeding a liquid in a liquid jet printer, the valve assembly including a valve seat (5) which extends around a liquid discharge opening (6) and interacts with said valve body to form a seal. The invention permits, amongst other things, the simple production of components parts of the valve assembly, and also permits the accurate feeding of liquid from the liquid jet printer. Said valve seat (5) is made of a flexible material (5A) capable of interacting with the moving valve body (4).

Abstract: A valve having a valve member of diameter less than the bore of an air compressor inlet which closes against a seal of flexible material such as TFE projecting into the bore of the inlet.

Abstract: A solenoid valve, especially an outlet valve for infusion water. A valve chamber (2) is accommodated in a valve housing (1) and communicates with a supply channel (Z) and with a drain channel (A) by way of a valve seat (3). The magnetic armature (6) of a magnetic system accommodated on valve housing (1) is connected to a valve plate (10) accommodated in the valve chamber (2) opposite the valve seat (3). The valve chamber (2) is sealed off from the interior (11) of the magnetic system by an isolating diaphragm (12). To prevent calcium deposits, the valve seat (3) has a sheet (13) of polytetrafluoroethylene accommodated coaxially along its inner circumference and projecting beyond the surface of the valve seat (3) on the side facing the valve plate (10). The upper edge of the sheet (13) facing the valve plate (10) is in sealing plane with respect to the valve plate.

Abstract: A valve, particularly useful in a fire extinguisher, which utilizes a stem movable in a passageway having a head connected to the stem. The head includes a relatively hard member possessing a hard outer surface which fits snugly within the passageway. The head further includes a deformable portion adjacent the relatively hard surface of the relatively hard member. The relatively hard surface of the relatively hard portion contacts and scrapes the wall portion prior to sealing which is effected between the deformable portion and the wall of the passageway.

Abstract: A rapid response poppet valve includes a valve body 10 with an internal cavity 16 in which a valve seat 100 is located. A poppet 70 is mounted for movement toward and away from the valve seat 100 and the valve seat 100 is resiliently biased toward the poppet 70 by a bellows 114 to resiliently mount the seat 100 and additionally seal the seat 100 to the valve body 10.