Abstract: The disclosure is directed to a valve arrangement for controlling a linear or rotary hydraulic motor. The valve is connected to a pump which acts as a pressure medium source by the valve means and to a tank. The tank connection may be either direct or indirect. The arrangement of the present invention includes at least one seat valve located in a main flow connection between the pump and a port of the motor. Each of the seat valves would adjust the flow in the main flow connection to the motor via a pilot flow adjustable by a pilot valve. The pilot flow originates from the main flow through the seat valve.

Abstract: Apparatus for use in supporting a plurality of override control handles of a control valve assembly, the control handles supported for movement in a first direction between engagement and disengagement with the control valve spools and supported for movement in a second direction to cause controlled movement of the valve spools. The apparatus includes a plate having slots housing the control handles and the plate being supported for slideable movement such that movement of one control handle between a valve spool engaging position and a disengaged position causes movement of the other control handles between an engaged position and a disengaged position.

Abstract: An improved, delayed closing plumbing valve of the type having a cartridge with hydraulic fluid in a sealed chamber retained between an upper and lower diaphragm positioned about a longitudinally movable valve stem assembly. The chamber has a one-way piston which divides the chamber into an upper and lower section, and there is a restricted fluid flow path between the two sections. A water shut off gasket is at the base of a valve stem and has a removable gasket ring to permit the replacement of the gasket. The valve seat may also be removable for replacement. The lower diaphragm is provided with a sealed chamber to prevent its degradation by particles in the water. The diaphragms at the upper and lower end of the chamber are retained and sealed to the valve stem by retaining rings having a conical upper end which holds the inner part of the diaphragm against the valve stem. The diaphragms preferably permit the turning of the valve stem with respect to the cartridge without damage to the diaphragms.

Abstract: An unloading valve utilized in an open center hydraulic system in conjunction with a conventional open center control valve having an open center passage and a dead end power passage; the unloading valve is supplied by a system pressure from a pump and divides the pump flow into two paths in a set proportion regardless of the amount of flow or pressure levels in either flow path, one flow path is directed to reservoir with the other flow path directed to the open center passage in the directional control valve while the dead end power passage of the control valve is separately provided with system pump pressure in a parallel path whereby only a portion of the pump discharge passes across the open center passage when the directional control valve is neutrally positioned.

Abstract: An electromagnetic valve uses a solenoid coil to produce a magnetic attraction of a cylindrical shell core against the action of a spring. A valve seat is constituted by a plate of a hard material arranged to cooperate with a circular ridge on an end of the core to obtain an hermetic seal therebetween. The plate is maintained against a bearing surface within a valve housing by a telescoping element located within the shell core and providing a sliding support surface for the shell core.

Abstract: There is disclosed a control valve having an inlet 24, an outlet 26 connected a a valve cavity 23. The valve includes an armature 31 of a solenoid 32, movement of which opens a valve seal 28 seated in valve seat 27. A piezoceramic transducer 21 transmits ultrasonic vibrations through a tapering output section 22 to the valve cavity, whereby cavitation is induced in liquid therin to cause cleaning of the surfaces.

Abstract: A diverter valve (1) includes a rotatable axially shiftable element (21) disposed within a housing (10) having a cylindrical wall (11), end walls (12, 14) and four cage bars (42-45). The element has channel plates. One channel plate (29) is disposed adjacent one housing end wall. The other channel plate (30) is disposed intermediate the housing end walls. An end plate (33) is spaced from plate (30) on the side remote from plate (29) and is disposed adjacent the other housing end wall. A tapered plug (27) joins the channel plates and joins plate (30) with end plate (33). Channel walls (34, 35) are spaced outwardly from the plug mounted to the housing wall (11) and extend inwardly between cage bars, with Segmental platforms (50, 51) are their inner edges (52, 53) receiving the edges of channel plate (30) when the diverter assembly (21) is in one position. When the assembly is in normal position, plug (27) is sealed against cage bars (42, 44). Quadrants formed by the cage bars form axial chambers (A-D).

Abstract: A control system (10) for supplying an operational chamber (38) in an air motor with pressurized fluid causing rotors (18 and 20) therein to move and develop an output torque in response to an input signal. Electrically operated valves (52 and 54) selectively controlling the flow of fluid from first and second bellows means (48 and 50) which are normally seated to seal distribution conduit (34 and 36) connecting the operational chamber (38) to the atmosphere. A select high disc valve (104) in the fluid pressure supply passage provides operating fluid to the distribution conduit (34 or 36) opposite the one which is vented to the atmosphere. In a two position air motor powered actuator, the electrical signals for the valves (52 and 54) may be derived as a simple function of actual rotor rotation and rotor rotational speed.

Abstract: The flow controlling valve, particularly mounted in a pipe flange structure, comprises a cylindrical housing, a flow passage whose cross section is controllable, a valve seat, and a valve member and at least one auxiliary valve mounted in the housing. The valve seat is formed as a mushroom member whose mushroom head has an edge with an adjacent seating surface and whose stem is connected to at least one supporting cross piece extending across the flow passage. The valve member is a spring-loaded hollow piston guided in the housing whose interior space forms the flow passage which is mounted with its inner edge positionable on the seating surface of the mushroom head. The auxiliary valve has a spring-loaded auxiliary stopper member with an associated auxiliary valve seat which controls a flowing medium branching from the main flow by a metering element.

Abstract: A conveyor belt dewatering system in which a siphon tube or pipe is vertically moveable on a tubular support whereby selectively its inlet is lowered into a conveyor belt. Counterweights counter the weight of the siphon tube, these weights being positioned in the tubular support. A source of service water is turned on by a float switch sensing water is the conveyor belt, the service water being used to submerge the weights and lessen their effect and at the same time be supplied to the siphon tube to increase its weight, whereby a siphon tube is lowered into the conveyor belt and siphoning from it commenced.

Abstract: A fluid pressure control valve for a hydraulic actuator has a valve body having a valve bore and a fluid port for discharging a fluid toward the hydraulic actuator, and a spool slidably received in the valve bore. The spool has a cylindrical spool section slidably fitted in the valve bore for closing the fluid port and a tapered spool section having a conical shape for opening the fluid port through annular open clearance of a variable area between the concial surface of the spool and the cylindrical surface of the valve bore. Between the cylindrical ad tapered spool sections, there is formed an annular groove or an annular face forming a step for preventing particles of dust suspended in the fluid from being bitten between the tapered spool section and the cylindrical surface of the valve bore by traping the particles.

Abstract: A proportional follower spool valve system having a main spool slidable between end chambers maintained at substantially return pressure. First fluid connections are controlled by the main spool and they are effective to control output fluid flow in accordance with the position of the main spool. A pilot spool is slidable within an inner passage of the main spool. A first and a second driving chamber is formed by the main spool each having a driving area substantially less than the largest cross-sectional solid area of the main spool. Second fluid connections are controlled by the pilot spool for admitting fluid under pressure (1) to the first chamber when the pilot spool moves in a first direction away from the first chamber and (2) to the second chamber when the pilot spool moves in a second direction away from the second chamber. Each of the first and second driving chambers are disposed between a respective end chamber and a passage for return pressure.

Abstract: A proportional hydraulic distributor with a hollow, cylindrical compensating slide, a seat at one end of the compensating slide, a reciprocable piston, an end of which is urged against the seat by a spring, a pressure assistance chamber surrounding the seat, and a choke connecting the entry pressure of the hydraulic distributor to the pressure assistance chamber. The balance of forces on the reciprocable piston and on the cylindrical compensating slide is equal to and oppositely directed with respect to the hydrodynamic drag force that develops during transitional phases of the operation of the hydraulic distributor.

Abstract: Siphon assembly for a flushing cistern is in two parts; the first including the down leg of the siphon duct the lower end of which is mounted in the cistern base and the second including the up leg and the inlet chamber in which the flushing piston is received. The parts are releasably connected by a push fit spigot and socket joint secured by a removable pin received transversely through locating formations on each part near the tops of the legs, further formations near the bottoms of the legs being received in vertical sliding relationship.

Abstract: An improved pilot operated, spool valve includes a valve body with a spool that translates axially in a throughbore in the valve body. The spool is moved in response to air pressure in a first direction and is moved in the opposite direction by a combination of a mechanical biasing force and fluid pressure.

Abstract: Pressure fluid operated servo system method and apparatus including a servo valve operable by an input signal to effect a system output movement; and which servo valve is responsive to the time rate of input signal receipt to vary a gain ratio of system output magnitude compared to input signal value; and method of making such a servo valve.

Abstract: A method of manufacturing faucets and spouts, faucet inserts and faucets and spouts manufactured by the method. The faucet or spout includes an upper housing plate and a lower housing plate, a peripheral flange being provided on each of the housing plates such that the flanges mate with a seal disposed between them in fluid sealing relationship, the housing plates having spaced apart surfaces extending from their respective flanges to define a chamber. The faucet inserts include a valving member rotatably received within a housing member, the housing member having an internal conical surface adapted for mating engagement with an external conical surface of the valving member, the valving member having a port adapted to be reversibly aligned and misaligned with a port in the housing member for selectively allowing and shutting off fluid flow.

Abstract: Disclosed is a direct-drive type electro-hydraulic servo valve in which dynamic characteristics of a spool are simulated by an electronic circuit or a computor to derive a signal representative of the spool velocity and the derived signal is negatively fed back to an input of a power amplifier.

Abstract: Disclosed herein is an internal combustion engine piston comprising a piston cap formed from a plurality of ceramic pieces, and a metal piston body, the piston cap being fixed to the top portion of the metal piston body, wherein the piston cap is made of one or more types of ceramic materials, and the ceramic pieces constituting the ceramic cap and the metal piston body are bonded together through a metallized layer coated onto the ceramic pieces and a metal-plated layer coated onto the metallized layer in such a manner that the bonding area between the ceramic piece or pieces and the metal piston body may be larger at a top central portion of the metal piston body than that between the ceramic piece or pieces and the metal piston body at another portion thereof. Also disclosed is a method of producing the same.

Abstract: An injection valve for a mixture-compressing internal combustion engines which is retained in the mounting bore in the suction pipe by way of a sealing ring. In order not to damage the sealing ring during the insertion of the injection valve into the mounting bore of the suction pipe, an axially displaceable sleeve is proposed according to the invention which slides on a cylindrical section of the injection valve. The sleeve includes a conical forward section that surrounds the sealing ring. During the installation of the injection valve, the sleeve is supported at the walls of the suction pipe and guides the sealing ring into the mounting bore without contact with the edges of the mounting bore.