Abstract: The disclosure is directed to an electromagnetic detent assembly for use with a manually operable hydraulic control valve to maintain the control spool in a predetermined limit position. The electromagnetic force created by the electromagnetic detent can be varied by an electronic circuit commensurate with the particular hydraulic application. A "feel" mechanism is also included, indicating to the operator that further manual movement of the control valve will cause it to reach the electromagnetic detent position.

Abstract: A solenoid operated directional valve with detent means for retaining the spool of the valve in either of two selected positions, the detent means being operatively associated with the solenoid pins for holding one or the other of the pins in a selected position and thereby for retaining the spool in a selected position in the absence of any direct connection between the detent means and the spool, the detent means further being located out of the flow-passageways of the valve so as to preclude interference with fluid flow and being constructed and arranged to provide detent disengagement forces of uniform low limits and with no side loads applied on the spool, and to contain no loose parts and to have a near infinite life.

Abstract: A cylindrical valve spool is slidably positioned in a chamber of a valve housing having a plurality of fluid inlet ports and a plurality of fluid outlet ports. The valve spool is movable to a selected one of a plurality of positions to interconnect a selected inlet port with a selected output port. A detent apparatus is associated with one end of the valve spool and is operable to lock the valve spool in one of three positions in the chamber. A remotely operated first pilot valve is operable to convey pressurized fluid to either end of the valve spool and thereby shift the valve spool to either a first or second end position for interconnecting selected inlet and outlet ports. A centering device is operable to shift the valve spool from either detented end position to a detented center or neutral position by deactivating the pilot valve and simultaneously conveying pressurized fluid from a second pilot valve to the centering apparatus.

Abstract: A manifold controls the venting of pressurized gas from an ordnance launc. A manifold block is provided with a number of passageways which communicate with a pair of recesses machined in the block. A high pressure gas valve is disposed in one of the recesses while a venting valve is rotatably positioned in the other recess. Ports are included in both of the valves so that when they are rotated a venting sequence of the launcher is effected. A specifically configured handle is secured to each of the valves and a spring biased pawl engages a number of teeth on the venting valve handle to allow only one direction of rotation. The configurations of the handles, the ratchet and pawl ensure a preestablished venting sequence and readying of the launcher for another shot.

Abstract: A buffer member, for locating adjacent the open end of a sleeve of a spool and sleeve valve. The buffer member comprises a generally cylindrical member formed of a resilient material and having one or more protrusions protruding inwardly of the central aperture. Preferably there are two protrusions arranged diametrically opposed. The buffer and surface may be formed with a projecting generally cruciform portion.

Abstract: An improved reversing valve for use in hydraulic actuators of electric high-voltage circuit breakers wherein the valve is of the type comprising: a ball for controlling the path to be reversed; means for continuously subjecting the ball to a pressure force; a movable plunger for loading the ball; a valve body for controlling the path to be reversed connected to the plunger; and a hydraulically movable piston connected to the plunger. The improvement comprises placement of the ball in a first stable end position by the continuous pressure force and the further inclusion in the valve of a roller toggle means responsive to the loading of the ball by the plunger for causing the continuous pressure on the ball to be reduced and the ball to be placed in a second stable condition.

Abstract: A sphygmomanometer system having a cuff, etc, and including both a regulator valve which normally bleeds the cuff pressure down at a substantially constant slow rate, and an exhaust valve which is operable to provide three rates of bleed, to wit nil, fast (as compared to the regulator valve bleed rate) and dump, the two valves together providing cuff bleed in accordance with predetermined schedule. The exhaust valve includes an elastic annular member compressible to achieve the fast and dump rates.

Abstract: A valve stem and disc for a disc-type valve assembly are held together by a retaining ring and constructed such that they may be assembled inside a valve housing while avoiding the possibility of the retaining ring binding upon either the stem or disc during assembly. The valve stem includes a truncated conical portion forming its distal end which acts to align the various valve members during assembly. In the method, the retaining ring is mounted on the valve disc first rather than on the valve stem. When the truncated conical end of the valve stem is inserted in the disc so as to spread the retaining ring until mating engagement is reached between the stem, the disc, and the retaining ring. The diameter of the truncated stem distal end is sized to preclude any binding on the retainer ring or disc during assembly.

Abstract: A mechanical actuating device for hydraulic control valves having complex control functions, which can be assembled from individual units in a modular system, each of which has valve bodies which can be operated by longitudinal displacement in a housing that can be joined to the housing of the adjacent module. The actuating device for each module has a cam control member rotatably mounted in a cam housing which can be placed on the module housing and which can be brought into engagement with the ends of the valve bodies protruding from the module housing. The cam control members of all individual modules are disposed with aligned axes of rotation, and a coupling is provided for the co-rotational joining together of the cam control members of adjacent modules in selectable relative angular positions to one another.

Abstract: A shift control mechanism having a detent means for selectively positioning the shifting mechanism for selective and alternative engagement of hydraulic actuators in a power shift transmission through spool valves operated by a control rack connected to the shifting mechanism.

Abstract: An automatic dispensing nozzle of the type for dispensing liquid such as gasoline, or the like, into a container and for automatically shutting off when the container is full. The assembly includes a housing having a fluid inlet and an outlet with the fluid passage extending therebetween and a valve disposed in the passage with a valve actuating stem extending exteriorly of the housing. A handle guard including a downwardly extending guide portion and a forwardly extending guard stem. A handle is pivotally supported at a front end adjacent the connection of the handle guard to the housing and extends to a rear end disposed adjacent the guide portion of the handle guard and engages the valve actuating stem for moving the valve actuating stem upon pivotal movement of the handle. The guide portion of the handle guard includes a forwardly extending rib and the rear end of the handle means is bifurcated to define flanges disposed on either side of the rib.

Abstract: A butterfly type valve is provided with an annular sealing ring disposed in a groove in the bevelled periphery of the circular valve plate. The operating shaft is journalled in a radially disposed external boss and an operating handle having a spring biased locking plunger is secured to the shaft. A locking plate having a plurality of locking apertures is adjustably clamped to the boss for operative engagement with the locking plunger on the handle.

Abstract: A piston type, pneumatically powered motor includes a valve assembly for reversibly supplying pneumatic fluid to opposite sides of a piston to reciprocate the piston through power strokes in both directions. The valve assembly has a spool reciprocably mounted in a sleeve that normally moves between two positions to reversibly supply pneumatic fluid to the piston. An actuating mechanism shifts the valve spool between its two normal positions responsive to movement of the piston near the end of each power stroke. When the reciprocation rate of the piston reaches a predetermined high or excessive rate, the actuating mechanism shifts the valve spool to a third position that short circuits the normal path of the pneumatic fluid flowing to the piston and channels the pneumatic fluid to an exhaust port.

Abstract: This invention relates to operating mechanisms for hydraulic control systems and it is an object of the invention to provide an operating mechanism which is self-locking. The mechanism includes a bar which is slidable in a channel, one face of the bar being cut away to provide two inclined surfaces. Rollers are retained by springs in the spaces between the inclined surfaces and one side of the channel. A plate is also located between the bar and the said side of the channel and a control member serves to displace this plate along the channel. The arrangement is such that, when the plate is displaced in either direction, it pushes a respective one of the rollers towards one end of the bar, thereby allowing it to roll down the inclined surface. On the other hand, if a force is applied to the bar in either direction, a respective one of the rollers will move up the inclined surface and wedge against the side of the channel, thereby locking the bar in position.

Abstract: A pre-adjusted control module comprises a bracket assembly adapted for attachment to a support structure of a construction vehicle. A control lever is pivotally mounted within the bracket assembly along with a bellcrank having a roller mounted on a first arm thereof. The roller is adapted to selectively engage either one of two notches formed on a lower end of the control lever and is biased in that direction by a tension coil spring connected between the bracket assembly and a second arm of the bellcrank. A control rod is reciprocally mounted in the bracket assembly and has its first end pivotally connected to the control lever and is adapted to have its second end connected to a self-centering valve spool of a directional control valve.

Abstract: A valve comprising a valve body having a bore and a plunger axially movable in the bore between an open and a closed position. The bore has a fixed valve seat therein and is in communication with an inlet port and outlet port on opposite sides of the bore seat. The plunger has a seat cooperable with the bore seat to make a leak-tight, face-to-face seal when the plunger is in its closed position. The plunger also carries a pressure-actuated "seatless" seal which seals against the walls of the bore and the plunger when the plunger is in its closed position and is subjected to system pressure.

Abstract: A combination lock and remote control valve for controlling admission of fuel to the carburetor of an automobile engine wherein an actuator is movable axially and in rotation to align ports in concentrically arranged parts of the valve to permit flow through the valve.

Abstract: A double-acting spool-type hydraulic control valve having a spring centered spool is described, the spool centering spring being arranged in conventional manner between two spring seats which bear in opposite directions on an end portion of the spool within a cover secured to one end face of the valve body. The spool is capable of a degree of over-travel beyond each of the maximum flow positions, which over-travel is resisted by an auxiliary spring arranged within the centering spring. Ball-and-recess type detent elements are provided for holding the spool at either of the maximum flow positions, these detent elements being arranged at the free end of the centering spring cover. The recessed detent element is shiftable on the spool axis between stops so that the spool can shift to a detented maximum flow position after having been forced to over-travel to permit registration between ball and recess.

Abstract: A control valve of the type comprising a rotatable distributing member having a distributing surface having a plurality of coaxial ribs intersected by radially extending rib portions projecting on the distributing surface and engaging a smooth surface of a stationary valve body to define therewith a plurality of coaxial part-annular channels for selectively interconnecting selected ones of a plurality of passages bored through the valve body and opening in the smooth surface. The distributing member is retained in engagement with the valve body by a corrugated spring washer clamped between the outer face of the distributing member and a cap or hood member fastened to the valve body, and the spring washer is fastened against rotation relative to the cap member, while the outer face of the distributing member has a plurality of recesses for receiving the corrugations of the spring washer to hold the distributing member in any one of several angular positions.

Abstract: Disclosed below is a valve constructed with an electrical circuit extending through separable flow-control elements of the valve whereby the circuit may be opened by actual parting of the separable elements. For specific uses, the valve is characterized by structure permitting instant opening to full flow, high flow capacity, self-opening action, and latching mechanism for locking it in closed position.

Abstract: A valve comprises a casing having two casing parts with a resilient membrane clamped between the parts. A switching member mounted within the casing deforms the membrane in each of a plurality of different switching positions, to selectively open and close communication between a plurality of connections of the valve.

Abstract: An easily assembled valve shifting mechanism includes a hexagonal shaft over which several different cam plates are slidably assembled in a predetermined manner. Each cam plate includes complementary cam surfaces for engaging and providing positive motion to a cam follower mounted on a valve spool. The cam surfaces of all the cam plates bear a predetermined relationship to each other to cause movement of the different valve spools in a predetermined sequence. One of the cam plates further includes detent means for defining each of the steps in the predetermined sequence.

Abstract: The power train of a crawler tractor comprises a hydraulically operated modulating main clutch (operated by a clutch control valve) for transmitting motive power from the tractor engine to a hydraulically operated reversible multi-speed range power shift transmission (operated by a shift selector valve) for varying the speed at the output shaft of the transmission. A control lever assembly at the tractor operator's station comprises a manually operable gear selector lever and a manually operable safety lever. The gear selector lever is pivotally mounted on an oscillatable shaft and movable laterally in opposite directions from a centered neutral position to rotate the oscillatable shaft and thereby operate the shift selector valve (connected to the oscillatable shaft) and shift the transmission to either first or second speed ranges in either forward or reverse direction.

Abstract: A detent mechanism for a reciprocably mounted valve spool includes a plunger mounted in a housing surrounding an end of said spool and including guide means for the plunger at its forward end and its rearward end to provide guide support of the plunger as it is biased into engagement with detent grooves formed on the valve spool. The detent assembly includes an assembly of parts including biasing means and guide means retained in their operative relationship with the plunger for ready insertion or removal from the housing.

Abstract: A fuel injection apparatus has two magnetic coils, a valve-opening magnetic coil and a valve-closing magnetic coil. During the valve opening operation the magnetic force caused by the valve opening magnetic coil moves the movable armature toward the opening position for discharging the fuel into the engine and during the valve closing operation the magnetic force caused by the valve-closing magnetic coil moves the movable armature to the closing position for stopping the fuel injection, so that the response time of the fuel injection apparatus is shortened.

Abstract: A fluid flow valve, particularly of the ball type, with an improved seal and mounting adapter arrangement to permit the valve to be uncoupled in place and swung out or completely removed for repair of maintenance or replacement without disturbing or disconnecting any other portion of the fluid flow system. The valve also includes an improved valve modulating control arrangement which includes frictional locking means coupling the valve control mechanism to the valve member for flow adjustment; but acting to lock the flow adjusting elements and the valve member itself against any significant change in flow control position in response to flow pressures tending to cause an angular shift or rotation of position of the valve element.

Abstract: A check valve comprises a spring biased poppet reciprocally mounted in a housing thereof to normally close an inlet to the valve. A set screw is threadably mounted in an exposed position on the housing to selectively vary the spring load on the poppet to thus vary the pressure setting thereof. An annular elastomeric locking member circumvents the set screw and is compressed radially inwardly thereagainst by a clamping member, releasably attached on the housing, to retain the set screw in its preset position.