Abstract: A ball check valve is provided having a ball retainer which is particularly inexpensive to manufacture and yet which is capable of allowing high amounts of flow without clogging or plugging. The retainer member is formed with three stamped pieces of sheet material which are generally u-shaped and have included an angle such that the sum of the angles is 360.degree.. In the preferred embodiment three such retainer components are used and the retaining member is held in place between two housing members which are threadably attached to one another. The ball and spring are held in place by the retainer member.

Abstract: A pressure regulating valve with a push pull adjusting knob includes a valve body housing a valve member defining an annular seat adapted for engagement with a knife edge seat on a valve sleeve insert. The valve member is opened and closed by a flexible diaphragm operating mechanism, the diaphragm being exposed on one side to outlet valve pressure and on its opposite side to the atmosphere and a valve control spring. A valve stem rotatably mounted in a valve bonnet adjusts a valve nut for varying the compression of the spring, and thereby the spring force on the diaphragm. A push-pull adjusting knob slidably and rotatably engages the valve stem. The knob is locked against the bonnet in one axial position and is released from the bonnet in the opposite axial position for rotating the valve stem. A detent between the valve stem and adjusting knob provides resistance to the adjusting knob movement, and knob movement is limited by a cap threadably engaged with the end of the adjusting screw.

Abstract: A valve device including a housing formed with a passage, valve elements for opening and closing the passage, a spring for urging the valve elements, and a controller for displacing the valve elements against the spring force. The spring has at least two deflection modes, one of which shows a larger spring constant than the other deflection mode and appears in one of two valve positions. The controller outputs a relatively large force for displacing the valve elements to the valve position at which the spring is deflected at the larger spring constant.

Abstract: In order to adjust the fiber orientation of a valve spring retainer made of arbon fiber reinforced synthetic material to the stresses appearing in practical operation, it is suggested that several stacked carbon fiber tissue layers be bedded into the valve spring retainer, that a conical opening run vertical to the tissue layers through these, that the weft and warp threads of the tissue layers are displaced from the cross section of the opening to the outside and each project over a part of the perimeter of the opening and that in the edge area of the opening the displaced weft and warp threads have a greater thickness than in the areas farther away from the opening. Furthermore, a process for the production of such a valve spring retainer is discussed.

Abstract: A poppet type valve assembly comprising a body having an axial bore extending therethrough and defining a fluid flow passage and an internal, generally cylindrical valve chamber. Seat means are carried in the bore adjacent a first end of the valve chamber to define a valve seat coaxial with the bore. A poppet valve member is mounted in the chamber for movement axially thereof toward and away from the seat. Extending axially of the chamber is a coil spring for maintaining the poppet valve member under a continual bias toward the seat. Valve stop means are provided for limiting movement of the poppet valve member in a direction away from the valve seat. The valve stop means including a central body portion having a plurality of legs which extend radially between a shoulder and the coil spring.

Abstract: A flowgrid regulator for use as a flow control device in conjunction with a pilot system. The invention includes a valve body, containing a flow barrier, that connects to a spring casing with a throttling plate, spacer and diaphram sandwiched therebetween. The throttling plate intersects the barrier and includes openings on either side of the barrier intersection for passing a flow under pressure therethrough. The diaphram is constructed of a non stretchable flexible material and is maintained to move vertically above the throttling plate to position a throttling element bonded thereto into covering engagement with the throttling plate openings. The diaphram position is controlled by a combination of spring force and pressure differential as supplied by the pilot system connection thereto to urge the throttling element against the throttling plate openings thereby controlling flow area and flow rate.

Abstract: A wastegate valve for an internal combustion engine turbocharger comprising a housing, a valve head carried by a valve stem and arranged to cooperate with a valve seat. The valve stem is mounted in a valve guide for movement between a position in which the valve head and seat cooperate to close the valve and block exhaust gas flow and a position in which the valve head is spaced from the valve seat to permit flow. A spring biases the valve into a closed position and a pressure plate is mounted to said valve stem, the spring acting on the valve stem via said pressure plate. A connection is provided in the housing on the side of the pressure plate remote from the spring to a supply of fluid under pressure whereby, in operation, to assist the exhaust gas in opening the valve. A wall extends across the housing to divide the interior of the housing into a portion containing the pressure plate and another portion connectible to the supply of fluid under pressure.

Abstract: A valve spring retainer and locking assembly comprising a locking member which is made screen-like and engages at least one peripheral groove of a valve stem end in a manner known per se employing a bulge, and is pressed against the valve stem end via a conical outer surface in interaction with a valve spring retainer. The locking member has the conical outer surface on the outer periphery of an umbrella-like support surface and also has a cylindrical contact surface with the valve stem on the groove side facing towards the free valve stem end. The valve spring retainer is supported against the screen of the locking member, is made of fiber-reinforced plastic and in the area of the conical outer surface of the umbrella-like support surface has a conical step which leaves an impression on the run of the fibers and, in interaction with the conical outer surface of the locking member, presses the locking member against the stem.

Abstract: A clutch pressure control valve for a hydraulically actuated friction clutch which includes a valve spool 5 disposed within a valve bore and having two control collars 6 and 7. The spool is acted upon at one end by a linear compression spring 8 and a speed dependent pressure signal, the spool serving to regulate the clutch pressure by regulating the free cross section at an outlet port disposed between its control collars. To avoid the second order variation of the clutch pressure with speed, the control collars 6 and 7 of the valve spool 5 have two different diameters and the spool 5 is disposed within a stepped bore 2, 3 and 4. The end of the linear compression spring 8, remote from the valve spool 5, abuts a reaction piston 9, which is disposed within the valve bore and is acted upon on one side by the speed dependent pressure signal and on the other side by a second, non-linear compression spring 11, which is compressed between the reaction 9 and a shoulder 12 in the valve bore.

Abstract: An electromagnetically actuatable fuel-injection valve for injection systems of internal combustion engines having a valve housing, a soft-iron core which is arranged within the valve housing and bears a stationary magnet windind and an armature which is coaxial to the core and faces it forming an air gap therewith. The armature forms a valve closure member. The valve has a passage bore which extends from an inlet, through the soft-iron core, to the valve closure member, within which bore a compression spring is arranged with its one end buttressed therein and its other end resting with a given initial stress against the armature. The compression spring is buttressed via an axially, plastically deformable support element in the passage bore, the resistance to deformation of the buttress element being greater than the force of the given initial stress of the compression spring.

Abstract: A fail-safe valve actuator includes a hydraulic piston (17) and cylinder (15) for driving the valve stem (9) and gate member (35) of a gate valve into a first flow control state responsive to sufficient pressure delivered by a fluid or gas supply line (92). Upon failure or other loss of sufficient control line pressure, a volute spring (7) drives the cylinder (15), and hence the stem (9) and gate member (35), axially outward resulting in the valve being moved into a second flow control state.

Abstract: A throttle valve for regulating the introduction of a fuel-air mixture into an internal-combustion engine is provided with a return spring system. The return spring system includes a first coiled spring, a second coiled spring, a hat-shaped bushing for separating the two spring coils and a lever, fixed in relation to a throttle valve housing, for simultaneously loading both spring coils to yieldably urge the throttle valve toward a normal position. The return spring system is positioned at one end of a shaft on which the throttle valve is mounted and operates to yieldably rotate the shaft in a selected direction to orient the throttle valve.

Abstract: A sealing mechanism for a pair of conduits held together by means of a frangible connector is described. Each conduit has a center pivoted butterfly valve with valve discs which are spring biased to a closed position. The valve discs are mutually abutting and normally hold each other open, but are released when the frangible connector is broken. Each disc is pivoted about an offset from a pivot support member, and the inner conduit walls are tapered between the open and closed positions of the disc so as to reduce the turning friction between the disc and the conduit walls. A mechanism for positively closing and latching the disc is a closed position is described. This mechanism is contained in a housing which is sealed off from the fluid containing portion of the conduit.

Abstract: A spring return for the reciprocable slide of an hydraulic distributor. The return spring is trapped between flanges of opposed cup-shaped rings. The cup-shaped rings have conical sections which are positioned inside of the spring, but which do not contact the spring. Each cup-shaped ring has a transverse bottom, and each of the transverse bottoms surrounds the slide and contacts only a cylindrical centering section on the slide. The cylindrical centering sections on the slide are short, and each cylindrial centering section loses contact with the surrounding transverse bottom of the cup-shaped ring shortly after the slide moves relative to such cup-shaped ring.

Abstract: A hydraulic solenoid valve having a self-contained spool positioning spring and washer solenoid tube assembly. The valve body is provided with a novel arrangement of ports providing for minimized pressure differential between the opposite ends of the valve chamber so as to facilitate positioning of the spool and permit utilization of a light biasing spring and high force solenoids. The port configuration permits minimizing the overall height of the valve body while yet providing for a relatively large cross section tank port, providing the desirable low pressure differential between the opposite ends of the valve chamber. The biasing assemblies further provide for reduced effect of the pressure differential on the spool valve end shafts, thereby further facilitating repositioning of the spool in the neutral position by the biasing springs.

Abstract: A housing has an inner area defined by end walls, side walls, a top wall, and a bottom wall having a flat inner surface. Inlet and outlet ports open through the flat inner surface. The inlet port is arranged to be connected to a supply source of pneumatic pressure and the outlet ports are arranged to be connected to an actuator. A control member in the housing has a pair of recesses facing the inner surface in association with the inlet and outlet ports. The control member is suspended by a pair of leaf springs which allow a high response of the control member with a low signal pressure. The leaf springs are engineered and tested precisely considering the compression or columnar force acting endwise thereon as a result of the working pressure in the valve. At the same time the leaf springs have lateral deflection sufficient for operation of the control member 54 without buckling.

Abstract: A control valve device for use in a carburetor outer vent control system of an automotive internal combustion engine. The device includes a solenoid coil generating a magnetic force and a spring made of a shape memory alloy so that the device may control fluid communication in a fluid passage in response to an input current signal from a switch device and in response to changes in engine ambient temperature.

Abstract: A valve train for an internal combustion engine embodying an improved valve spring arrangement that permits a compact valve placement. The valve springs are disposed so that they are non-circular in planes perpendicular to the axis of the associated valve stem and are disposed with a long axis and a short axis. The long axes of the respective springs extend parallel to each other so as to facilitate the close placement of the valves.

Abstract: A valve body (20) for an endoscope is moulded from polypropylene and has a straight through bore (27) to aid cleaning of the valve body. The valve body (20) has spaced external ribs (48, 50) which locate the valve body (20) with respect to the casing of a handle (10) of the endoscope. At one end the valve body (20) receives a threaded sleeve (30) which retains a slidable valve member (34) in position, a cap (42) being manually depressed against spring loading to open the valve and place a source of suction in communication with a side stem (38) which is intended to be connected to a passageway leading to the distal end of the endoscope shaft.

Abstract: Water is carbonated in a fast and efficient manner by causing a flow of carbon dioxide through the water being carbonated at a controlled rate through a small orifice until a predetermined pressure is reached in the carbonator and, upon reaching the predetermined pressure terminating flow through the orifice.

Abstract: In a drink dispenser for dispensing carbonated drinks which includes a source of carbon dioxide at high pressure and a source of carbon dioxide at a lower pressure, the lower pressure being a pressure utilized for dispensing carbonated water, water within a carbonator tank is quickly carbonated by admitting carbon dioxide to the carbonator at the higher pressure until a pressure intermediate the higher and lower pressure is reached, venting the head space of the carbonator to the lower pressure, and, preferably, of repeating these steps a plurality of times.

Abstract: A safety device for venting excess pressure in a wet capacitor container (1) includes a lift valve (4) disposed in the wall or lid of the container, the body of the valve (4) being disposed with the aid of at least one resilient member (6) for being pressed against the valve seat (7) against the action of the pressure prevailing in the container (1), the member (6) being implemented as a resilient tongue (6) on a washer-like spring (8), where the tongue has been bent over in a direction towards the valve body (5). The spring (8) is also provided with a plurality of tongues (9) bent over in a direction away from the valve body (5) for retaining the spring (8) in the container.

Abstract: In a zone valve, an improved arrangement for connecting the operator unit to the valve unit is provided. A one piece wire locking spring carried by the operator unit in conjunction with a groove on the valve unit valve plug provides a snap connection.

Abstract: A check valve particularly for use in large-volume applications includes a self-contained pressing unit which is mounted on a common pivot with the valve member in the outlet compartment of the valve housing and presses the valve member towards its closing position in which it sealingly contacts the valve seat. The pressing unit includes an elongated support member and an L-shaped pressing member which are mounted on a bearing sleeve for angular displacement relative to one another about the axis of the bearing sleeve. A buckling-type spring is mounted between a free end portion of the support element and the region of merger of the two legs of the L-shaped pressing member, the spring urging the pressing component away from the support component, and against the valve member upon installation on the pivot. The spring characteristic is such that the spring force initially rapidly increases, than drops precipitously and then remains substantially constant over a substantial range of deformation of the spring.

Abstract: The invention relates to a stop which is locked in position a bore of an operative device as well as to a device provided with at least one such stop. The stop is adapted for use particularly with, but not exclusively, with a safety valve. The stop includes a skirt adapted to be received in a bore and having at one end (29) by which it is connected to a centering dish (26), a diameter which adjusts itself practically without play in the bore (30) designed to receive the stop. At a second free end (31) the skirt has a diameter prior to positioning in the bore which is larger than that of the bore (30) intended to receive the stop so that, during the assembly, the skirt is compressed by the walls of the bore and thereafter, by reaction, it is forcibly pressed against the walls of the bore (30).

Abstract: A control valve assembly 10 having a pair of axially opposed seats 54, 56 is disclosed. A poppet 66 is disposed in a control chamber 58 between the seats. The poppet is movable between the seats to establish an average pressure in the control chamber. The poppet is an integral portion of an armature 28. In one embodiment, the armature is urged in a first direction by a solenoid and in the opposite direction by a conical spring 76 which extends between the armature and a housing of the valve. In another embodiment, the armature has a spherical zone 94 on a convex surface 92 and a spring guide 84 engages the spring and has a concave surface which engages the spherical zone.

Abstract: A faucet with built-in needle valve includes a hollow stem, a needle valve resiliently mounted in the hollow stem and a syringe movably inserted in the hollow stem so that the syringe may be depressed to open needle valve for spray water outwards directly from a faucet which is normally closed and after pulling syringe upwards, needle valve may be automatically closed to stop water spray by a restored spring resiliently backing the needle valve.

Abstract: A check valve particularly useful for water well applications. The valve components are positioned at the low pressure, downstream side of a flexible poppet. A flexible guide, shaped generally as an inverted top hat, snaps into place in an annular groove and responds to longitudinally directed forces from the water flow and a biasing spring to forcibly retain the guide in the groove. A stem affixed to the poppet slides within an aperture of the guide and restricts the poppet to generally longitudinal motion.

Abstract: A valve lock-valve spring retainer assembly where the valve lock and valve retainer mating surfaces are spherical. The spherical valve lock-valve spring retainer mating surface permits small rotations of the valve spring retainer with respect to the plane perpendicular to the valve stem. This significantly reduces valve spring generated side loads on the valve guides.

Abstract: A normally closed spool type solenoid-controlled valve which changes its opening in proportion to the amount of current supplied to the solenoid. The spool which blocks the valve opening in an overlapping relation is held in a closed position by a dual spring design having differing spring rates wherein the lighter spring holds the spool in an overlapping closed position.

Abstract: A valve device, especially for die casting machines. The device comprises a control drive and a control member which is arranged between the control drive and the valve cone, and which converts the rotary movement of the control drive into an axial stroke movement. The object of the invention is to provide a quick acting valve device with which the adjustable limited opening of the valve cone can, with the aid of small manual or motor forces, be effected with structurally simple means in a space saving device housing in the direct drive. For this purpose, the control member which serves to adjust the opening limitation of the valve cone is a threaded sleeve which engages in a thread of the valve housing. Every time the working surfaces of the valve cone are acted upon by pressure, different hydraulic pressures are exerted upon the oppositely located end faces of the threaded sleeve for releasing the sides of the threads of the sleeve from the sides of the threads of the housing.

Abstract: A valve spring retainer assembly includes a valve stem for reciprocation with respect to an engine head. A valve spring retainer provides a thrust surface against which a valve spring biases the valve stem into a closed position. The retainer includes an annular lock portion for preventing extrusion of the retainer key through the valve spring retainer.

Abstract: A valve of an internal combustion engine in which for purposes of increasing the strength within the area of the annular groove for the conical pieces retaining the spring plate for the valve springs, the corners of the annular groove are rounded-off with a relatively small radius which passes over into the cylindrical part of the annular groove by way of a larger radius; the upper portion of the valve stem is provided with an outer layer which is induction-hardened and which extends up to within the clamping area of the conical pieces.

Abstract: An internal type, spring damper for use in an internal combustion engine or the like having a cylinder head with a poppet valve supported for movement between valve open and valve closed positions and with a coiled valve return spring loosely encircling the stem of the valve and operatively associated at one end with the valve and having its bottom end operatively in abutment with the cylinder head whereby to normally bias the poppet valve to the closed position, has at least its corresponding bottom end of reduced external diameter for a predetermined axial extent whereby to eliminate damper-to-spring contact for up to at least 11/2 coils of the valve spring at its bottom end.

Abstract: A tilt valve for an aerosol can is constructed so that it can be actuated only by transverse tilting forces. An output valve stem assembly is sealed to a valve housing whose inlet communicates with the interior of the aerosol can. A tilt element is biased against the bottom of the output valve assembly so as to seal the interior of the valve housing. A barrel-shaped spring is used to bias the tilt element so that the resistance of the output stem to tilting, and the stroke required for actuation, are reduced. The input stem and the bottom of the tilt element provide a secondary valve which is closed upon the output stem being subject to downward axial forces. Therefore, only transverse forces provided by an automatic actuating device can be used to actuate the tilt valve assembly.

Abstract: A valve operating mechanism for an internal combustion engine for an automobile in which friction is decreased without an increase in the mass to be moved by the valve closing spring. The valve operating mechanism has a roller arranged on an actuation spindle. The roller cooperates with a bearing surface on a component of the mechanism that is connected to the valve, at least during valve opening, so that deviations of the valve lift curve from the desired valve lift curve are eliminated. Connection between the actuation spindle, through the roller, and the valve is maintained only during the valve-open cycle.

Abstract: A pressure valve has a valve member 22 which can be lifted from its seat against the effect of a valve spring 25, 26 and a control piston 12 which is movable coaxially to the valve member, and a connection passage 15, 21, 23 having a throttle point 16 extending from the pressure side of the valve member to an opening on the side of piston 12 which faces away from the valve member. In order that the valve limit pressure peaks with a simple structure, the valve spring abuts on the control piston and the surface of the valve member on which pressure acts is smaller than the surface of the control piston on which pressure acts and which connected to the valve member surface through the connection passage.

Abstract: The invention contemplates a check-valve construction which exhibits substantially elevated resistance to onset of unidirectional flow (i.e., to valve opening), as compared with conventional constructions. This elevated resistance to valve-opening is achieved through use of a knuckle joint, connecting the valve member to the valve body and spring-urged to its most-spread condition when the valve member is in its closed position. The invention is shown and described in connection with a check valve having two valve members, each of which derives materially enhanced resistance to valve-opening displacement, through use of a separate spring-loaded knuckle joint associated with each of the respective valve members.

Abstract: A panel mounted control valve including a housing having a bore with a valve seat formed in the bore. An axially and rotatably movable actuating member which has a valve member thereon is mounted in the bore for movement therein. A nut member is threadably mounted on an end portion of the actuating member and moves axially to compress or decompress a spring which biases the valve member to closed position. A slot is formed in the housing and the walls of the slot are located adjacent opposed flat portions on the nut member to prevent the nut member from rotating but permitting it to move axially.

Abstract: A direct drive type servo motor in which a spool is driven directly by a force motor, the force of the force motor being balanced by the reactional force generated by a resilient member to stabilize the position of the spool to control the flow of working fluid. The resilient member is constituted by a metallic cylindrical member having holes formed in the outer peripheral surface thereof. The holes are arranged such that, when the force is applied to the cylindrical member in the axial direction, the cylindrical member produces an axial reactional force. In consequence, the generation of force component which would act to press the spool against the sleeve is avoided to reduce the friction between the spool and the sleeve to permit a smooth movement of the spool, while allowing the resilient member to have a high spring constant to improve the response characteristic of the servo valve.

Abstract: An improved compression valve mechanism for a shock absorber comprising an upwardly facing annular valve seat on the shock absorber piston, an annular valve seat engaging member having an exterior periphery spaced closely from the interior periphery of the cylindrical shock absorber chamber providing a relatively small annular gap therebetween and a downwardly facing surface adapted to engage the upwardly facing annular valve seat, an annular seal mounted above the annular member in motion transmitting relation therewith, the seal being made of relatively rigid material and being split radially so as to be expandable radially outwardly and having an upwardly and inwardly facing generally frustoconical spring force transmitting surface and a peripheral sealing surface, and a coil spring above the seal having its upper end fixed with respect to the piston and having its lower end disposed in force transmitting relation with the force transmitting frustoconical surface of the seal so that the seal is biased ther

Abstract: A varible rate spring for use in a combustion engine has a lower spring rate at high valve lifts than at low valve lifts to reduce contact stresses in the valve train assembly (24) at maximum valve lift. In one embodiment, the varible rate spring includes a cantilevered spring (70) having a free end (80) for engagement with a valve (12), a fixed end secured to a cylinder head (18) and an intermediate portion (88) which engages a pair of stops (90/92). As the valve moves between the seated position to an intermediate lift position only that portion of the spring (70), from its free end (80) to the intermediate portion (88) engaging the stops (90/92) is active. At the intermediate lift position the spring (70) disengages the stops (90/92) and the entire length of the spring (70) becomes active thereby decreasing the spring rate. In another embodiment two coil springs (94/96) are connected in series having a separator (110), which acts as a spring damper, disposed therebetween.

Abstract: A dual master cylinder (10) includes a pair of pistons (62, 106) moving in a bore (14) to contract a pair of pressure chambers (64, 108). A housing 12 defines a pair of inlets (26, 28) communicating liquid from a reservoir (18) into the pair of pressure chambers (64, 108). A pair of outlets (46, 48) communicate liquid from the pair of pressure chambers (64, 108) to a pair of brake systems (50, 52). A pair of tilt valves (34, 36) control liquid communication through the inlets (26, 28). The pair of pistons (62, 106) carry a pair of valve actuators (182, 210) which open and close the pair of tilt valves (34, 36) in response to movement of the pair of pistons (62, 106) within the housing (12). The pair of actuators (182, 210) cooperate with one another to simultaneously close the pair of tilt valves (34, 36) during a brake application.

Abstract: A valve structure in which a valve member moves into and out of contact with first and second valve seating areas, the valve member contacting the seating areas with different forces. The movable valve member is comprised of block members coupled together so that a change in their relative longitudinal positions produces a corresponding change in their relative transverse positions. A stem member moves the block members to spaced longitudinal positions and produces different longitudinal separating forces between the block member in these positions thereby to urge one of the block members in a transverse direction with different forces against the valve seating areas. The application of forces directly through block members and indirectly through springs is employed to provide different valve seating forces. Block members for valve port blocking and valve port opening are utilized. A shock absorbing structure incorporating a movable spring holder is also utilized.

Abstract: A valve selector including a telescoping spring capsule subassembly having a dual retainer ring arrangement for limiting the maximum extended length thereof. A cup-shaped spring retaining member has an internal groove formed near its rim and a cup-shaped spring receiving member has an external groove formed near its outer open end. The spring retaining member is partially received over the spring receiving member with the external groove axially aligned over the internal groove. A compression spring is captured between the opposed bottom surfaces of the retainer members. An inner retaining ring is received in the external groove and an outer retaining ring is received in the internal groove. The outer ring has an internal diameter sized less than the outer diameter of the inner retaining ring for providing a radial overlap condition. The maximum spacing of the spring receiving and spring retaining members is limited by abutment of adjacent axial faces of the inner and outer retaining rings.

Abstract: A three way slide valve includes a rectangular valve slide fitted into a housing formed of two halves having mating flat surfaces. Each housing half is recessed to provide a chamber for the valve slide and also a spring chamber which restrains both ends of a double acting return spring. One end of the return spring engages one end of the valve slide and the other part of the spring engages a loop on the valve slide for return to center action. Ports in the housing halves are provided with shear seals in engagement with the valve slide.

Abstract: A temperature-detection type change-over valve for switching the state of communication between a plurality of passages, suitable for use in combination with a controller for controlling the operation of an internal combustion engine. The valve has a thermally expandable member adapted to expand when heated, a shaft adapted to be pressed and moved in one direction as the thermally expandable member expands, a valve movable following the movement of the shaft between a first and a second position for switching the state of communication of passages, and a tension spring disposed to surround the shaft and adapted to exert a biasing force to act against the force generated by the expansion of the thermally expandable member.

Abstract: A thermostatic expansion valve for use in a refrigeration system (e.g., a refrigerated display case) in which the superheat range of the valve may be conveniently adjusted from a location remote from the valve.

Abstract: An air compressor having a main pressure line connected to an object to be inflated and an accumulator connected to the main pressure line through a restrictor to receive an average of the output pressure during the pumping stroke and to receive, at other times, the actual object pressure so that the pressure in the accumulator corresponds to the pressure in the object, and a relief valve responsive to the pressure in the accumulator for connecting the accumulation to atmosphere when a pressure preselected by a regulator is obtained in the object.

Abstract: To provide significant manufacturing and assembly cost savings in a rugged construction featuring a minimized number of simplified component parts, a thermostat is provided wherein an open-ended shell is mounted for movement toward and away from a fixed valve seat for controlling fluid flow responsive to a thermally responsive actuator, and a return spring assembly is provided for urging the shell in the direction of the valve seat which assembly includes means directly connected to the shell and providing a return spring seat for effecting transfer of the thermal actuator return spring load directly to the shell.