Abstract: An internal combustion engine having an exhaust system is shown provided with an air pump which is effective for supplying air to the exhaust system to oxidize unburned hydrocarbons within the exhaust gases of the exhaust system; a valve assembly, operatively interposed between the air pump and the exhaust system, is effective, in response to parameters of engine operation, to at times cause a portion or even all of the air supplied by the air pump to be delivered to the atmosphere instead of to the exhaust system.

Abstract: A control valve assembly incorporates direct metal-to-metal engagement between a casing of a temperature-responsive valve actuator and a piston guide to promote ease and accuracy of calibration. In addition, a substantially frictionless override feature is incorporated in the assembly to effect pressure relief and to accommodate thermal excursion of the valve actuator beyond the travel required to effect the desired valve movement.

Abstract: An integral power steering gear includes a valve within the piston exhibiting improved responsiveness and overall operation. The piston incorporates a rack along the side in engagement with an output pinion. Dual washer springs are provided at the ends of the valve mounted in face-to-face, sliding contact. The spring rate that is thus doubled provides an improved response pattern for the power steering gear. The neutral flow of hydraulic fluid is reduced by narrowing the opening between the adjacent grooves in the valve and the piston. These features together give an improved performance envelope in both of the critical parameters; i.e., steering wheel movement versus net output and steering wheel torque input versus net output. Essentially, the envelope is substantially closed with these improvements giving the desirable improved responsiveness and better feel to the steering.

Abstract: A unique relief valve is provided for use with a fluid system and comprises a reducing bushing having a throughbore. The bushing is externally threaded for connection with a standard fluid connector and, similarly, is internally threaded around its throughbore for connection to a further fluid connector in the fluid system. A valve seat having a fluid passageway is secured to the bushing while a valve member cooperates with the valve seat and is movable between open positions and a closed position. In its closed position, the valve member closes the fluid passageway on the valve seat and thus prevents fluid flow through the reducing bushing while, conversely, with the valve member in its open positions, fluid communication is established through the reducing bushing throughbore. A helical spring abuts against the valve member at one end and, at its other end, against a spring seat and urges the valve member towards its closed position.

Abstract: An improved bypass valve for use with an oil well testing string is disclosed which includes a check valve means for allowing fluid flow from the interior of the test string to the well annulus when the interior pressure exceeds the well annulus pressure. The bypass valve further includes a blocking means which blocks interior communication with the check valve means when the well annulus pressure exceeds the string interior pressure. A delay means is included which delays the action of the blocking means for a predetermined length of time. The improved bypass valve is intended for use in a testing string for an oil well, and is to be placed in the testing string below a normally closed tester valve and above a seal assembly for insertion into sealing engagement with a preset production type packer. The time delay allows the seal assembly to be removed from the packer after the packer location is determined without activating the blocking means to move to its locked closed position.

Abstract: The invention contemplates a combined closure spring and upstop having particular application to check valves having multiple valve members. The invention is illustrated by one embodiment involving two valve members hinged on a single axis oriented diametrically of the valve-flow passage, and by another embodiment involving more than two valve members hinged on separate axes oriented tangentially of the valve-flow passage.

Abstract: For use with a variable displacement piston type pump, a valve responsive to pump discharge manifold pressure for controlling the pressure in the pump chamber, and which controlled pressure creates a force for regulating the stroke of the pump pistons to maintain a predetermined substantially constant pressure with a variable flow of fluid through the pump.

Abstract: A high flow rate electromagnetic injector valve with a rapid response time is disclosed for utilization in a single point fuel injection system. Centrally bored end caps are fixed at the front and rear ends of a tubular injector body and a coil wound on a bobbin is disposed inside the body chamber between the end caps. The front end cap receives within its bore a valve assembly including a valve housing and a needle valve with attached armature reciprocally movable against a valve seat to obturate a metering orifice in the valve housing. The valve housing contains fuel inlets for the pressurized entry of fuel into the injector and the needle valve is ported to provide fluid communication to the armature to relieve pressure build-up. The rear end cap mounts within its bore a core member acting as a stator which extends through a central bobbin bore to form a controllable air gap adjacent the armature: the core member further contains internally an adjustment screw and ball member.

Abstract: A novel relief valve is provided for connection with a fluid system. The relief valve includes an elongated housing having an inlet and an outlet with a fluid passage connecting the inlet to the outlet. Preferably, the housing is constructed of a number of conventional and readily available pipe fittings. A relief valve assembly is disposed within the fluid passageway and comprises a perforated tube with a valve seat positioned at one axial end of the tube and adjacent the housing inlet. A valve member is also disposed within the perforated tube and is urged against the valve seat by a helical spring to normally prevent fluid flow through the relief valve. A stop pin is disposed through substantially diametrically opposed apertures in the perforated tube at a position spaced from the valve seat which acts as a stop for the end of the helical spring opposite from the valve member.

Abstract: A nozzle of a dyestuff applicator has a cylindrical valve housing formed with an orifice obstructable by the tip of an electromagnetically displaceable needle which controls the outflow of dyestuff from a chamber in that housing. The chamber is sealed by a rubber diaphragm which is penetrated by the needle whose shaft is engaged by a pair of parallel membranes of spring steel peripherally clamped in an extension of the housing. Each membrane comprises a narrow outer ring with an inwardly projecting tongue split into two diverging branches which are interconnected at their free ends, near the diametrically opposite side of the outer ring, by a re-entrant web extending radially between these branches and terminating in an inner, needle-supporting ring concentric with the outer ring.

Abstract: There is disclosed a pressure relief valve having a part which is movable to a first position for returning the closure member thereof to closed position, and thus resetting the valve, automatically in response to a predetermined low pressure level of fluid within the flowway, and to a second position which permits the closure member to move to open position automatically in response to a pressure level of the fluid to be contained which is less than that at which the valve is set to open.

Abstract: A fluid flow device having a biased closure structure for selectively closing an opening in a flow conducting structure. The closure includes a pair of closure members pivoted relative to a transverse axis of the opening and biased to the closed position by a spring which is maintained spaced from the closure members in the closed position thereof. The spring has a midportion which is brought into engagement with the closure members as an incident of the movement thereof to and beyond a preselected position intermediate the closed and fully opened positions of the closure members. The spring acts to resiliently bias the closure members toward the closed position as result of the spring tension between the closed position and the intermediate position and the abutment of the midportion of the spring with the closure members at and beyond the intermediate position permits the closure members to be swung toward the fully open position with a decreased force.

Abstract: A flap valve is provided which includes a valve housing having a valve seat defined therein, on one side of which is a flow inlet chamber and on the other side of which is a flow discharge chamber, at least one locking element pivotably mounted in the valve housing for movement between an open and closed position relative to the valve seat, and at least one locking spring mounted in the flow inlet chamber of the housing having one portion which is rigidly held in the valve housing and a pivotable lever arm which engages the locking element to urge the locking member into the closed position. The lever arm of the spring and the locking member are slideably coupled together so that the force required to open the locking member increases only slightly or preferably decreases during the opening pivotable movement of the locking member.

Abstract: A pressure limiting valve having a valve disk which is pressed against a passage opening by the force of a spring braced against an abutment with the valve disk connected to a guide rod which passes through an opening of the abutment and movable relative thereto, the abutment and the guide rod being tilted relative to each other by means which apply a force eccentrically at the abutment and/or the valve disk.

Abstract: An apparatus for controlling the hydraulic system of hydraulic actuators, such as hydraulic cylinders. The apparatus is constituted only by a combination of two kinds of control valves in that normally opened and normally closed, solenoid-operated, spring-returned type control valves are serially connected together through a common port formed in each control valve.

Abstract: A vacuum relief and access door assembly, for use on a duct downstream of a fire or control dampers, comprises a frame including a duct facing surface with a seal member thereon, a closure member having side edges in sealing engagement with the seal member, and cooperative retaining members mounted on the frame and closure member and resiliently urging the closure member into sealing engagement with the seal member, yielding to allow the closure member to displace toward the duct to allow air flow thereby for vacuum relief and returning into sealing engagement with the seal member said retaining members being releasable for removal of said closure member.

Abstract: A valve is reciprocable between open and closed positions along a longitudinal axis and is rotatable about the axis by a rotator mechanism. The rotator mechanism includes first and second parts movable axially and rotatably relative to one another along and about the longitudinal axis. Circumferentially shiftable means is located between the first and second parts for imparting relative rotation between the parts during relative axial movement therebetween. A Belleville spring washer is located between the shiftable parts. The inner periphery of the spring washer bears on one of the parts and the outer periphery of the spring washer bears against the other part. The central portion of the spring washer bears against the shiftable means. The shiftable means is preferably either a ball or garter spring having a curved outer peripheral surface. The spring washer has a depression formed therein to provide a concave surface in contact with the curved outer peripheral surface of the shiftable means.

Abstract: A valve member is axially supported for reciprocal movement within the lower portion of the chamber of a valve housing. The chamber lower portion is sealed from the chamber upper portion by a flexible diaphragm assembly. The valve member includes a cap maintained in abutting relation with the lower surface of the diaphragm assembly. A valve stem is coaxially aligned with the valve member above the diaphragm assembly and includes a head portion that abuts the diaphragm assembly opposite the cap. Downward movement of the valve stem is transmitted through the diaphragm assembly to downwardly move the valve member into sealing relation with the valve seat. The valve is opened by advancing the valve stem upwardly within the chamber. A Belleville spring assembly surrounding the valve member urges the valve member to move away from the valve seat to open the valve.

Abstract: A fuel control device is adapted to be used in the place of the conventional pilot jet of the carburetor of an internal combustion engine. This device comprises a chamber defining first and second valve seats, as well as a double-acting movable valve member cooperating alternatively with said valve seats. The chamber is connected by the first valve seat to a fuel inlet, and by the second valve seat to an air inlet, and its wall has openings by means of which said chamber may be interposed in a low-pressure conduit connected to the carburetor. Means are provided for maintaining the valve head in an intermediate position, i.e.

Abstract: A valve closure replacement kit for a compressor valve of the type having a valve plate, and a plurality of linear slotted openings in such valve plate for passage of air or gas therethrough and a valve head located above said valve plate in spaced relation, said closure replacement kit being characterized by an integral one-piece valve closure member, said closure member having a plurality of slots formed therein, defining therebetween a plurality of valve closure bars, said slots being located out of registration with the slotted openings in the valve plate, and locating the valve bars in registration with such slotted openings in the valve plate, and said one-piece valve closure member defining at least one valve closure guide surface, at least one complementary valve guide member for attachment on said valve plate, and, an integral one-piece spring member having slotted opening means therein in registration with said slotted openings in said one-piece valve closure member, thereby defining spring arm port

Abstract: A poppet type check valve for controlled feeding of blowing agent into an assembly for the extrusion of thermoplastic polymeric foam material and, in particular, for controlled feeding of a blowing agent such as pentane into the barrel of an extruder assembly for extrusion of polystyrene foam; and an apparatus assembly comprising such a check valve in combination with the barrel of an extruder for extrusion of such foam materials.

Abstract: A crawler tracked vehicle of the type including right and left crawler tracks is provided and includes a prime mover drivingly connected to the crawler tracks through a differential, or the equivalent, as well as separate clutch and brake mechanisms interposed in the drive train for the tracks intermediate the differential and the tracks. A single oscillatable control is provided as well as a set of fluid pressure actuators for the clutch and brake mechanisms. A source of fluid under pressure is also provided and a set of fluid flow conduits communicate the source of fluid pressure with each of the actuators, independently, with a set of valves being provided and operatively associated with the fluid flow conduits for selectively controlling the flow of fluid therethrough to the corresponding actuators.

Abstract: A check valve comprises a housing having a ball normally disposed on a seat defined therein to prevent communication of fluid from an inlet to an outlet thereof. A torsion spring is mounted on the housing to have an end thereof engage the ball to hold it in its normally closed position and to permit opening thereof to communicate the inlet with the outlet when the level of fluid pressure in the inlet exceeds a predetermined level. In the preferred embodiment, the torsion spring is mounted on a rotary member rotatably mounted in the housing to selectively adjust the closing force applied to the ball to vary the pressure setting thereof. During assembly of the valve, a pin is secured to the housing in blocking relationship across an outlet passage to limit pivotal movement of the end of the spring and to prevent the ball from rolling therepast.

Abstract: A valve body for a pressurized aerosol dispenser valve has an annular groove in the spring retaining nipple adjacent its junction with the remaining portion of the valve body to eliminate the "shaving" or "tail" scraped from the surface of the plastic of the valve body when the spring is placed on the spring retaining nipple of the valve body.

Abstract: A tamperproof lock for a fire hydrant. A spring is mounted at one end on the fire hydrant housing. Power transmitting means are mounted on a threaded operating rod extending within the housing chamber. The power transmitting means transmit power to the threaded rod against the spring. A swivel plate is freely mounted on the power transmitting means for rotational movement thereon. The swivel plate has a contoured hub portion adapted to fit within an aperture within the fire hydrant bonnet. The hub portion is exposed to the exterior of the bonnet. Power means for applying power substantially along the axis of the threaded rod to move the rod against the spring are removably mounted on the bonnet. Means for preventing axial and rotational movement of the power means is pivotably connected thereto by means of a double pivot joint.

Abstract: An exhaust brake valve assembly structurally arranged to provide reliable operation with relatively quick response. The assembly includes a sliding gate valve member driven by a power actuator through a lost motion connection which generates a desirable impact force on the gate to overcome static frictional forces. The lost motion connection cooperates with a relief port in the gate to relieve peak pressure forces on the gate just prior to opening movement to additionally improve opening reliability and response. Still further, the actuator includes a spring return arrangement in which the force rate adjacent the closed gate position is substantially greater than the force rate at the open position so that adequate reserve return force is developed for opening while only a minimal spring force resists piston movement in the initial opening movement.

Abstract: An improved relief valve, particularly suited for interior use in refrigeration systems. The valve includes a valve body having an inlet, an outlet, and a passageway therebetween with a valve seat positioned in the passageway. Inside of the passageway are mounted an adjustable valve spring retainer, a coil valve spring, a valve piston including a fluorocarbon sealing surface thereon, and a bearing means mounted between one end of the valve spring and either the retainer or valve piston. The spring retainer is adjusted by turning in its threaded mounting. The bearing means prevents the turning moment applied to the retainer from extending to the valve piston. Any rotational relation between the piston sealing surface and seat which would be deleterious to the sealing engagement is eliminated.

Abstract: Uniform load clutch device for transmitting a motion from a driving member to a driven member while permitting friction slippage between the two members should the driven member be stopped, wherein the driving member has a cylindrical part on which are freely mounted first and second friction pads with the driven member interposed therebetween, and resilient biasing means mounted on said cylindrical part and locked thereon in operational position exerting a force to bring into firm engagement said members and friction pads, whereby no relative movement will take place between said resilient biasing means and said driving member during the transmission of said motion.

Abstract: The fuel channel leading from the pressure chamber of a fuel injection pump to the injection nozzles includes a volume containing a valve spring and formed by a cap threadedly engaging the valve body. This cap also provides an axial force which clamps internal elements of the valve mechanism into firm and sealing contact. An elastic insert, whose contours are similar to those of the cap, is located within the cap. This insert deforms under the force of the threaded cap and provides an elastic force reservoir which maintains the clamping and sealing force even when the cap is slightly loosened.

Abstract: A check valve controlled by the medium passing through comprising: a housing having an input opening on one side defining a valve seat and an output opening communicative with the input opening, a locking member disposed over the input opening of the valve seat and positioned on the seat, the locking member having a pivot axis at one end, a bearing cap mounted in and engaging the walls of the discharge opening, the cap having a pair of bearing side plates formed at one end, the side plates having laterial recesses formed therein for receiving the pivot axis of the locking member. There is also a spring coupled to the housing for urging the locking member against the valve seat.

Abstract: A gas dispensing assembly suitable for dispensing oxygen from a vessel pressurized to 1800 pounds per square inch, the assembly including a manually operable member to turn supply of oxygen from said vessel on and off, a regulator valve supplied with gas at the pressure inside of the vessel when the supply is turned on, a spring biased regulator operable to control the opening and closing of the regulator valve to regulate the pressure in an outlet to a desired pressure for supply of the gas to the interior of a face mask; the assembly being capable of supplying oxygen to the face mask for a period exceeding 15 minutes at a flow rate exceeding 6 liters per minute with little variation of that flow rate with variation of pressure of the supply of oxygen.

Abstract: A flow regulator for air ducting comprises a flap which can be rotated about a shaft against the action of a spring, by the air current, to regulate air flow therepast. The flap has two portions which are disposed at an obtuse angle to each other about a bend line, one of the portions, in an open condition of the regulator, being directed downstream of the shaft generally parallel to the ducting axis, and is obliquely oriented in the closed condition and the other portion, in a closed condition of the regulator, is disposed in a plane lying at right angles to the ducting axis, and is obliquely oriented in the open condition. The obtuse angle of the flap portions is preferably of the order of 145.degree. to 155.degree..

Abstract: A flap valve, in particular a check valve comprising a valve housing and a valve seat formed therein, a plate-like locking member cooperating with the valve seat, the locking member being pivotably mounted to the housing, a locking spring extending across a remote front face and having a longitudinal axis substantially crosswise with respect to the pivot direction of the locking member. The locking spring is held axially pretensioned with one end on the valve housing and with another end on the locking member and the locking spring has the form of a leg spring and at least one winding connecting the legs. The windings are mounted substantially parallel to the front face of the locking member.

Abstract: A high volume, fluid pressure relief valve for the top of a vent opening in a fluid storage tank. The valve includes a valve member which is reciprocal to and from a valve seat disposed in alignment with the vent opening. Constant force spring means coact with the valve member for normally retaining the valve member in closed condition, whereby the fluid pressure force required to move the valve member remains substantially constant throughout the travel of the valve member. A large venting capacity is provided in a single compact valve device and the valve is so constructed and arranged that pilferage from the storage tank is prevented. Also the valve may include an arrangement allowing "in-breathing" of the storage tank.

Abstract: A fluid flow regulating device for use in fluid handling systems which is capable of maintaining substantially constant flow rates over a wide range of variations in system pressure. The device includes a housing having disposed therein a conduit whose lateral wall includes one or more apertures of a predetermined configuration. A piston is disposed within the conduit and is axially displaceable, in response to pressure differentials, throughout the portion of the conduit wherein the apertures are located. A spring mechanism having a specified non-linear coefficient of stiffness is employed to yieldably resist downstream displacement of the piston. The piston and aperture together form a variable area flow passageway through which substantially all the fluid must pass. A pneumatic, thermometric mechanism may also be employed to displace the piston within the conduit in response to changes in temperature and independent of pressure variations.

Abstract: An adjustable air volume regulator adapted for maintaining a constant volume flow of air therethrough regardless of variations in pressure of the air being supplied to the regulator and being adjustable for accurately maintaining a constant flow of air over a wide range of flow rates. The regulator includes a housing defining a passageway for the flow of air therethrough, valve means movable within the housing for adjustably restricting the flow of air therethrough, reciprocable linkage means cooperating with the valve means for controlling movement thereof, a spring mounted exteriorly of the housing and being connected to the linkage means for exerting an opening bias on the valve means in opposition to a closing bias imparted thereon by the pressure of the air in the housing, and means cooperating with the spring means for varying the biasing effect imparted thereby by varying the effective length of the spring for thereby adjusting the regulator to maintain a different substantially constant flow rate.

Abstract: An air volume regulator adapted for use in an air distribution system for maintaining a constant flow of air therethrough regardless of variations in pressure of the air being supplied to the regulator is provided with adjustment means to permit adjusting the regulator for maintaining constant flow at a variety of different flow rates. The regulator includes a housing defining a passageway for the flow of air therethrough, valve means movable within the housing for adjustably restricting the flow of air therethrough, and a coil compression spring cooperating with the valve means for exerting an opening bias thereon in opposition to a closing bias imparted on the valve means by the pressure of the air in the housing. Adjustment means is provided cooperating with the coil spring for immobilizing a selected number of the turns of the coil spring so as to vary the biasing characteristics of the spring and thereby adjust the regulator for maintaining a different flow rate.

Abstract: In a plural range pressure regulator construction having a spring for acting on a flexible wall of the construction to provide one pressure range for the regulator construction when the spring is in a certain position thereof and for being stored in a removable cap of the construction so that the spring will be in another position thereof and will not act on the wall so as to permit the regulator construction to provide another range thereof, the improvement wherein the spring has a spring retainer secured to one end thereof with the spring retainer being adapted to be snap-fitted onto a projection of the cap whereby the cap and spring are removed in unison from the housing when it is desired to change the operating position of the spring.

Abstract: A check valve for fluid flow lines and for pump discharge lines in which the components are arranged to assist in the prevention of sand and foreign material holding the check valve element open, in which the assembly and disassembly of the several components is performed from one end of the housing which receives the check valve, and in which support means are employed on both sides of the check valve, with one of the support means acting to prevent check valve spin but free to accommodate lateral displacement of the check valve and the other support means having a minimum area to prohibit sand and abrasive material lodging in or adjacent the area relied upon to support the movement of the check valve.