Abstract: Briefly, the present invention comprises the improvement in a valve arrangement for controlling the flow of a fluid including a valve block having at least one substantially flat valving site on a surface thereof, the valve block defining passages communicating with the valving site through openings, a resilient diaphragm covering the valving site and forming a fluid tight seal with the valve block along the periphery of the valving site and a closure element having a substantially flat closure surface, the closure element being actuable between an open condition wherein the closure surface is retracted a preselected distance from the valving site and diaphragm, and a closed condition wherein the closure surface forces the diaphragm against the valving site; whereby the diaphragm can be urged away from the valving site by fluid pressure in the passages and the closure element is in the open condition, establishing a valve chamber above the valving site for fluid flow between the passages, and if forced agains

Abstract: A bonnet is mounted on an insert support and connected to a valve body to retain a diaphragm in fluid sealing relationship between the body and insert support. The insert support is rotatable relative to the housing of a fluid actuator while being retained in a fixed axial position relative to the housing. A plunger is extended through the insert support to abut against a button that abuts against one side of the diaphragm, the opposite side of which abuts against a valve seat subassembly that is resiliently urged to a valve open condition. The housing mounts a spindle which in turn has an eccentric lobe keyed thereto for moving the plunger toward the diaphragm so that the button flexes the diaphragm to move the seat subassembly to its valve closed position. Piston operated rack mechanism controls the rotation of the lobe for moving the plunger toward the diaphragm. Spring mechanism moves the piston in one direction while fluid under pressure applied to the actuator moves the piston in the opposite direction.

Abstract: This invention is an impulse-driven power-generating pump having a collapsible self-restoring "cylinder" subjected externally to discrete impulses which reduce the volume of the "cylinder" thereby displacing fluid therefrom. The impulses may derive from a moving or changing weight or other force-producing means. In particular, the event of railroad traffic is used, the fluid being hydraulic and the discrete impulses being produced by the wheel flanges of passing trains. These impulses act on one or more pumping components each comprising a hydraulic fluid container having a collapsible wall with or without resilience, a length less than the minimum distance between adjacent train wheel axles, a width less than the distance between rails, an inside height of approximately one inch, and an overall height of less than six and one-half inches including the emplacement and supporting structure.

Abstract: The point at which pump out pressure exceeds load is sensed to provide a point for scheduling flow to an actuator in a hydraulic system. Flow is controlled by a stepper motor (28) that moves a flow control valve (27). The steps needed to achieve fixed flow changes are greater for high flow positions. When the pump (21) is turned on, the valve (27) is positioned to bypass flow; the bypass flow is then programmably decreased to the actuator. Reverse flow is regulated by the valve (27) to control actuator retraction. Reverse flow is initiated by opening a check valve (40) with an actuator (50) that opens it first to reduce pressure across the valve, then fully. The flow control valve (27) also operates to relieve excess pressure in the system.

Abstract: An improved faucet drain assembly for preventing damage to a faucet due to freezing of residual water in the faucet upon exposure of the faucet to low temperature conditions. The faucet drain assembly comprises a faucet extension member supported by the faucet, the faucet extension member having a drain bore extending therethrough which is in fluid communication with the faucet, and a fluid valving assembly disposed in the drain bore and responsive to the flow pressure through the faucet.

Abstract: A means of adjusting the angular relationship between an input shaft and a torsion bar extending coaxially through the input shaft in the hydraulic valve of a power steering gear which consists of a pin extending through transverse radially extending aligned holes in the torsion bar on the input shaft the pin and the holes being shaped so that rotation of the pin about its axis causes a limited degree of rotation of the torsion bar relative to the input shaft. A pin is provided with means whereby it can be rotated about its axis and so that it can be fixed in a desired position in relation to the input shaft.

Abstract: There is disclosed a spool type direction control valve for controlling the oil flow direction in a hydraulic circuit including a pressure source, a hydraulic cylinder and a spool member. A flow control mechanism is provided in an oil passage connecting one of the oil chambers of the hydraulic cylinder to the spool member. The flow control mechanism comprises a poppet type piston adapted for opening and closing the oil passage. When the spool member is switched over for supplying the pressure fluid to the other oil chamber of the hydraulic cylinder, the pilot pressure from the pressure source is caused to act on the piston in the valve opening direction, while the back pressure of the discharge side pressure fluid corresponding to the load acting on the one oil chamber is caused to act on the piston in the valve closing direction, so as to control the discharge flow of the pressure fluid from the one oil chamber.

Abstract: A faucet valve 10 includes a ball valve 28 seated in a valve chamber 18. The ball valve 28 has a plurality of apertures 46 circumferentially spaced about the control stem 32 which extends through an opening 60 in the cap assembly 48 of the valve housing 16. A check valve 66 is formed within the hollow interior 62 of the ball valve and includes a disc section 70 that mounts a flap valve 78. A shield formed by a cylindrical wall 80 downwardly depending from the disc section 70 and a snap ring 84 fitted on the lower end of the cylindrical wall protects the flap valve from undue water turbulence. Negative pressure in the supply inlet opens the flap valve 78 to draw air through passageway 64 formed by the apertures 46 and auxiliary opening 60 and hollow interior 62 of the ball valve seated in the valve chamber 18.

Abstract: The valve disclosed herein functions as a flow matching device. By employing such a valve, hydraulic systems may be implemented in which filling and emptying of a variable volume load, such as a hydraulic piston, may be accomplished through simple check valve structures at controlled flow rates.

Abstract: In a directional seat valve all the valve seat components disposed axially adjacent each other in the housing bore are held between two closure screws and for assembling the valve the movable valve elements are supported via the valve actuating pin on a punch. By turning the closure screws the valve seat components can be adjusted in the axial direction so that the actuating pin has a predetermined spacing with respect to the housing end side of the valve. An advantage resides in that in the assembly of the valve itself a constant dimension can be set between the actuating pin and the housing and consequently an adjustment on subsequent attachment to the actuating means dispensed with, in particular an adjustment of the actuator cooperating with the actuating pin.

Abstract: A load responsive system including individual positive and negative load compensators, for control of positive or negative load and an external logic system for determination of whether the controlled load pressure is positive or negative. The deactivating valve deactivates the positive load compensator, when the negative load pressure exceeds a certain minimum predetermined level, preventing flow of fluid from the system pump to the system actuator controlling a negative load at a pressure higher than a certain predetermined level, and therefore preventing development of excessive pressure in the actuator, while also deactivating the negative load compensator below a certain minimum predetermined negative load pressure level and while the positive load is being controlled by the positive load compensator.

Abstract: A direct acting flow control valve operative by an actuator responsive to fluid pressure from an external source. The actuator includes a pair of spaced apart pistons and associated rolling diaphragms which define an actuator chamber into which the fluid pressure is admitted, and a separate leakage chamber into which fluid will pass on leaking through a defective diaphragm, the leakage chamber being adapted for communication with an external indicator, shutoff valve or the like.

Abstract: A control valve having three motor passageways and a combination sequence and regeneration valve in a common housing, wherein the combination sequence and regeneration valve operates to prevent fluid communication between the third motor passageway and an inlet passageway when the pressure in the inlet passageway is below a first predetermined amount and permits bidirectional fluid communication between the third motor passageway and the inlet passageway when the pressure in the inlet passageway exceeds that predetermined amount.

Abstract: A control valve for controlling the distribution of pumped hydrodynamic fluid to the trailer brakes of a tractor and trailer combination in response to hydrostatic pressure applied from the tractor braking system has an inlet for pumped fluid, a spool valve operable in response to a control piston to control the flow of pumped fluid to a first working trailer braking circuit through an outlet and to a tank, or reservoir, through an outlet, a flow control valve which provides a passageway communicating with a first flow path for pumped fluid to the spool valve and which is operable in response to pumped fluid pressure to control the flow of pumped fluid to a second working implement circuit through an outlet, and a second flow path for pumped fluid extending between the inlet and spool valve independent from and parallel with the first flow path, so that the spool valve controls the flow of pumped fluid through the second flow path to the fluid outlet leading to the trailer braking circuit.

Abstract: A poppet valve assembly and method of making same are provided and such assembly comprises a housing; a flow passage in the housing with the passage having a central axis and being adapted to flow a fluid in either direction therethrough; a poppet structure for controlling flow through the passage; a support structure for supporting the poppet structure during movement thereof along the axes; an actuator contact on the poppet structure between its head and stem to enable movement of the poppet structure along the axes; and apparatus for engaging the contact to provide the movement wherein the support structure comprises a cylindrical inside surface provided on the housing and having an axial length generally of the order of several times the particular diameter, and the support structure also comprises a cylindrical outside surface on the stem which slideably engages the inside surface, with the inside and outside surfaces cooperating and defining sole means confining the poppet structure against movements tr

Abstract: An electro-hydraulic pressure regulating valve including a control pressure chamber, an annular supply pressure port connected to the control pressure chamber and having a first seat area, an annular exhaust port connected to the control pressure chamber and having a second seat area equal to the first seat area, an armature valve plate spring biased to a supply seated position closing the supply pressure port with the exhaust port open, and an electric solenoid operative when selectively energized to create a solenoid EMF for moving the armature plate to an exhaust seated position closing the exhaust port with the supply pressure port open. The armature plate has a circular cut-out therein aligned with the centers of the annular supply pressure and exhaust ports and the differential pressure area of the armature plate in the supply seated and the exhausted seated positions is equal to substantially only the first and second seat areas.

Abstract: A pressure compensated hydraulic valve (2) is provided with a housing (4) having a reciprocal spool (6) for communicating hydraulic fluid to work ports (8,10). Pressure compensating means (58) is provided in the same housing with the valve and senses work port pressure by hydraulic fluid flow through the spool from the work port and creates a substantially fixed differential pressure across the spool by controlling the pressure after the flow has passed through the spool.

Abstract: A hydraulic control valve having a valve housing including a cylindrical valve bore, the valve bore being in communication with a supply port, a discharge port and first and second delivery ports each with first and second openings to the valve bore. A valve pin is slidable within the valve bore, the valve pin including first and second pin grooves operable to establish communication between the supply port and either of the delivery ports to the exclusion of the other delivery port, the supply port and discharge port communication being establishable through corresponding valve bore openings of respective delivery ports. Supply port communication with one of the delivery ports is establishable simultaneously with discharge port communication with the other delivery port.

Abstract: A control valve for a vehicle fluid pressure braking system includes a housing having an inlet port, an outlet port and a delivery port. A plunger is movable in the housing to control communication between the ports. The plunger is provided with a shoulder which carries a sealing member which engages with a seating area on the housing to provide a seal controlling communication between the aforementioned ports. The seal includes a circumferentially extending cavity on the housing in which the body portion of the seal is received. A pair of beads project from the body portion of the seal in opposite axial directions, so that when the seal is moved into engagement with the seating surface, one of the beads sealingly engages the sealing surface, and the axial direction forces generated thereby force the bead on the opposite side of the seal into sealing engagement with a sealing surface on the plunger.

Abstract: A valve assembly for a sphygmomanometer controls the inflation and deflation of a pressure cuff. The valve assembly includes an inlet connectable to a fluid pressure source such as a bellows, an outlet which is connectable to a blood pressure cuff, an inlet directional control which actively prevents the flow of fluid from the outlet to the inlet, axial passages which connect the inlet to the outlet, and means for slowly and fixedly or rapidly releasing pressure. The valve assembly may be set to one of three positively located positions: a cuff inflation position, a metered deflation position, or a fast vent position. In the cuff inflation position, fluid pressure delivered to the valve assembly's inlet passes through an inlet directional control to the valve assembly's outlet and on to the pressure cuff which becomes inflated.