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 surface cooperating and defining sole means confining the poppet structure against movements tra

Abstract: A fluid control valve 10 and an actuator 17 for a closure member 18 therefor are disclosed and claimed. The actuator 17 comprises a shaft 20 mounted to be stationary in valve body 11. A hollow member 19 is mounted on shaft 20 to reciprocate relative to the longitudinal axis of the shaft. A stationary partition mounted on shaft 20 divides member 19 into first and second fluid tight, variable volume chambers 26 and 27. By varying the pressures of fluids in chambers 26 and 27 the member 19 is caused to move between first and second positions on the shaft thereby to move the closure member 19 between open and closed positions.

Abstract: A liquid shut-off valve has a hollow cylindrical casing connected in a liquid pipe such as a water supply pipe, a hollow cylindrical valve seat member disposed in a downstream portion of the casing and having a valve seat opening, a guide member disposed in an upstream portion of the casing and having large openings for allowing main flow of the liquid to pass therethrough and a small opening for shunting a small-rate flow of the liquid serving as a signal liquid, and a hollow valve seat member slidable in the casing between an open position where it opens the valve seat opening and a close position where it closes the valve seat opening. The hollow valve member having pressure-receiving ends of different pressure receiving areas so that it is moved to the close position when a liquid pressure is established in a pressure chamber defined by the hollow valve member and the guide member.

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 air valve actuated by an electric motor has a cylindrical inlet section. The inlet section defines a seating surface upstream of which is a support grid. A backplate, upon which the actuating motor is mounted, is fixedly supported by a plurality of rods that extend downstream of the inlet section. A damper assembly includes a generally planar damper mounted for movement axially of the inlet section. The damper assembly includes a splined rod which extends upstream and into a cooperating spline in the support grid. A threaded spindle extends downstream of the damper plate through a cooperatively threaded motor-driven drive gear which is mounted for rotation on the backplate. Because a portion of the damper assembly is splined, the damper assembly cannot rotate and is driven axially within the valve by the rotation of the drive motor and drive gear.

Abstract: A choke valve for use on water injection wells is disclosed. The valve comprises a body, a sliding sleeve, in the body, a boss shaped plug, and a means for urging the sliding sleeve against the plug. The fluid path through the valve is largely straight, reducing wear on the valve, and the valve is devoid of screwed fittings.

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: The present invention relates to a valve assembly for controlling fluid flow in a fluid flow regulator. The valve assembly comprises a deformable plug 1 e.g. of rubber, having a cylindrical body formed with a circumferential groove 5 and a pair of backing plates 2 and 3 located at either end of the plug 1. The plates 2 and 3 are bonded to the plug 1 and, in use, plate 2 is moved to stress the plug 1 and cause it to expand radially to restrict an annular clearance between the plug 1 and a valve seat (not shown) in which the plug 1 is located. This enables fluid flow through the clearance to be controlled. A flanged steel ring 4 is mounted on the backing plate 2 and a circular neck portion 10 of the plug 1 is located between the ring 4 and the plate 2, the portion being bonded to the plate 2. The ring 4, and especially the groove 5, serve to prevent or inhibit erosion of the plug surface in use.

Abstract: A valve including rotor means of which position is rotatably fixed within tubular flowpassage means; rotating magnetic field generating means fixedly positioned around said rotor means; first screw means which are rotated coaxially with the rotor means together with the latter; second screw means which engage the first screw means and are movable in an axial direction of the screw without being rotated for itself by the rotation of the first screw means; valve body means connected to the second screw means; and valve seat means in engagement with the valve body means, whereby the rotor means are rotated by the action of the rotating magnetic field generated by the rotating magnetic field generating means, said rotation causes the second screw means to be moved in an axial direction of the screw, and said movement is transmitted to the valve body to adjust a degree of opening and closing of the valve.

Abstract: An air valve actuated by an electric motor has a cylindrical inlet section. The inlet section defines a seating surface upstream of which is a support grid. A backplate to which the actuating motor is mounted is supported by a plurality of rods that extend downstream of the inlet section. A damper assembly includes a generally planar damper mounted for movement axial of the inlet section. The damper assembly includes a splined rod which extends upstream of the damper and into a cooperating spline in the support grid. A threaded spindle extends downstream of the damper plate through a cooperatively threaded motor-driven drive gear which is mounted for rotation on the backplate. Because a portion of the damper assembly is splined, the damper assembly cannot rotate and is driven axially within the valve by the rotation of the drive motor and drive gear.

Abstract: A normally open pneumatic air control valve includes an inlet section which defines a seating surface and a support grid. A support plate, located downstream of the inlet section, is itself supported by a plurality of rods extending from the inlet section. A damper assembly is disposed for movement axial of the inlet section and is supported for such movement between the inlet section support grid and the downstream support plate. The damper assembly is actuated by the admission of a pressurized gas to a chamber cooperatively defined by a housing fixed to the support plate and a diaphragm disposed therein. A spring acts on the fixed grid support of the inlet section and on the damper assembly to urge the damper assembly away from the inlet section so that the valve is biased to the open position.

Abstract: A normally closed pneumatically actuated air valve for use in a variable air volume air distribution system has a unitary inlet section which supports a damper assembly and actuator through a support grid disposed in the inlet section. The damper assembly is mounted for axial movement, on a fixed spindle and guide piston, under the impetus of the expansion of a pressure chamber defined by a portion of the damper assembly and a diaphragm which conformably surrounds the guide piston. A biasing spring acts on a surface of the fixed guide piston and on the damper assembly to bias the damper assembly toward a seating surface of the inlet section.

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: A combined pressure-regulated and check fluid flow valve is disclosed which is adapted to be installed directly on the pipeline and serve also as a protection against water hammer in case of sudden pressure failure in the line. The valve is installed within a housing configured as a uniform extension of a pipeline to which the valve is connected. The structure consists mainly of a freely reciprocable differential piston associated with a fixed differential cylinder, a freely reciprocable valve member at the inlet side and a freely reciprocable piston at the outlet side of the housing.

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 choke valve with a power system operated via a single hydraulic line. The sleeve of the choke valve is operated by a carrier mounted through an eccentric pin and guide track arrangement to open and close the valve with the rotation of a valve drive shaft. A power shaft is driven by a clutch plate, ratchet connected to a drive clutch plate, in turn, operated by the shaft of an hydraulic actuator. The valve actuator creates an incremental step sensing of its full sixteenth turn movement by closing a fluid exhaust port and causing back pressure in the hydraulic line to occur. The actuator is reset by a pre-loaded torsion bar. Reset of the actuator also ratchet resets the drive clutch plate.

Abstract: Response time to an actuating signal of an in-line valve including a sleeve (26) closeable against the seat (24) by reciprocal movement within a body (10) on a guide (44) is minimized by providing an actuating chamber (86) bounded by the complementary, mating surfaces (82, 84) so that less pressurizing fluid need be introduced into the chamber (86) to cause actuation. Response time is further enhanced by making the guide (44) in the form of a tube which vents the interface between an annular wall (62) and a web (30) on the sleeve (26) against which pressure in the chamber (86) acts.

Abstract: A flow-control valve assembly particularly useful in fire fighting apparatus comprising a contoured valve seat mounted axially within a valve body and a balanced tubular valve member reciprocably movable in the valve body coaxially with said valve seat for providing proportional flow control, manual valve actuating means for reciprocably moving the tubular valve member including a disc rotatably mounted in a bore formed in a lateral surface of the valve body on a pivot member on which a handle is pivotally mounted and a pin spaced from the pivotal member extending through the handle and the disc which engages in a circumferential groove formed in the outer surface of the tubular valve member for effecting reciprocable movement of the valve member when the handle is reciprocably moved. The disc can be made of deformable material and provided with means for expanding the disc to impart a braking action on the movement of the handle.

Abstract: A vertically positioned valve body having a valve seat positioned coaxially in the body in a horizontal plane. A valve element positioned upstream of the seat and axially movable in the body. The cross-sectional area of the valve element is approximately one-half of the cross-sectional area of the body around the valve element. A plurality of diametrically opposed piston and cylinder assemblies raise the valve element away from the valve seat and allow the valve element to seat by gravity and fluid flow. Guide means are provided between the valve element and the body for guiding the valve element. A sealing valve and seat are positioned upstream of the valve seat about each of the assemblies for sealing off the assemblies when the valve is closed.

Abstract: A throttling and shut-off valve assembly for slurry pipelines and the like takes advantage of a gravity induced concentration and velocity gradient which develops in a substantially horizontal flow of coarse slurries. The throttling and shut-off valve assembly includes a conduit which is disposed substantially horizontally and wherein a valve body is mounted in an elongated streamlined housing to seat against a valve seat. The valve body is actuable to move substantially axially in the conduit. Both the valve body and the streamlined housing are disposed substantially along the longitudinal center line or axis of the conduit, which is upwardly offset relative to the longitudinal axis of the pipeline from which the flow is directed into the valve assembly. The bottom wall of the conduit is level with the bottom wall of the upstream portion of the pipeline.

Abstract: A fluid transport line for conveying a dangerous fluid such as LNG is provided with an emergency disconnector which severs the line in an emergency situation after cutting off the flow of fluid therein. The cutoff system includes a pair of seal pistons urged toward one another to cut off the fluid passageway while allowing fluid trapped between the pistons to escape back into the line, and an external clamp mechanism which allows the line to be separated after the fluid flow has been cut off.

Abstract: An auxiliary controlled valve including a valve body (8) displaceable against a valve seat (9) disposed in a drilling string (6) to produce pressure pulses in drilling fluid renders possible a selective closing or opening of a low-resistance transmission section (12) which lies parallel to a main throttle section (10). The valve has a central passage which permits the passage of measuring instruments through the valve regardless of the particular position of a valve body (8). The valve body (8) is largely balanced out with regard to dynamic flow forces so that only a comparatively small actuating force is necessary.

Abstract: A reversing valve for a combination meter, including a closure element, movable in the axial direction, which is provided with a cylindrical closure ring which in the closed position of the reversing valve covers radially outwardly directed valve openings, and having at least one channel extending essentially axially associated therewith, which channel is closed in the closed position though already after slight shifting of the closure element in the direction of its open position communicates the working chamber of a hydraulic adjustment member with the main flow. The working chamber additionally has a presettable opening which is always open in the direction of the auxiliary flow or total flow. The effective-pressure-cross section of the closure element is suddenly enlarged inwardly during opening, and is reduced in a sudden manner during closing, by having the main flow act on the working chamber.

Abstract: A fluid pressure operated valve device for connection to the inlet and outlet sides of a pilot valve has a two part, axially separable hollow cylindrical body with axially aligned inlet and outlet passageways, a side ported hollow cylindrical liner of smaller diameter having a closed end and an open end is fixed in the body with its open end surrounding the inlet passageway, a biased closed valve element reciprocates in the liner and controls the ports, passageway means for applying inlet pressure to the interior of the liner to close the valve element, and passageway means leading from the interior of the liner to the exterior of the valve body and from the exterior of the valve body through the valve body to the outlet passageway.

Abstract: A fluid flow control valve has a body enclosing a transfer passageway whose bounding surface is profiled to provide streamline flow conditions. The passageway is constricted by means of a piston-like valve moving transverse to the direction of fluid flow. A profiled shield protects the valve from direct impingement of fluid.

Abstract: A control valve with balanced plug for fluid flow control having a cylindrical guide barrel provided with discharge ports, and a coaxial plug which slides in the plug. The plug is balanced through bores which cause the pressure to be the same on opposing faces of the plug and upstream and downstream of the plug. The plug is rigidly connected by a control lever to an operating stem of the valve, in such a manner that the plug and the stem move rigidly in the same direction along non-coinciding parallel axes.The lever is resilient to compensate for errors of parallelism between the operating stem and the barrel caused by constructional defects or severe operating conditions.Preferably the lever is of the gooseneck type to limit weight and overall size, and the neck of the valve body is of elliptical cross-section.The valve is of the universal type, and operates independently of the direction in which the fluid flows.

Abstract: A hydraulic system for feeding an action turbine comprising a rectilinear gate and an injector mounted in series on a conduit through which water is supplied to the turbine wherein the gate has a shut-off which is mounted in an outer body member for the injector, said shut-off having a seat member associated therewith, the injector including a needle valve which has a seat member associated therewith, said seats being located adjacent one another. The needle valve may have a support associated therewith and the shut-off for the gate may be located upstream thereof. The needle valve seat may be displaceable downstream to permit closing of the gate. In such position, the needle vale and its seat may be disassembled without emptying the water supply conduit.

Abstract: A compact valve and actuator includes a housing with a cylindrical bore which is open on one end of the housing and substantially closed at the second end except for an inwardly extending coaxial inlet tube. A cylindrical slide member is concentrically received between the outside of the tube and the inside of the bore and is provided with a piston-forming flange which is restricted in axial movement by a stop ring also located around the slide member midway of the bore. The second end of the bore and the stop ring form ends of a cylinder for the aforementioned piston-forming flange of the slide member. The slide member further includes valving apertures which cooperate with the stop ring to communicate fluid received via the inlet tube either to the open end of the bore, or via apertures in the stop ring to a by-pass.

Abstract: A fluid control valve is equipped with a plurality of sleeves nested one within the other to form a cage for pressure reduction between the inlet and outlet ports of the valve housing. Each sleeve is provided with blind bores, through-bores and interconnecting grooves which cooperate to repeatedly divide the flow into more and more partial flows which keep colliding with one another. Volume control is achieved by a slidable piston cooperating with the cage.

Abstract: An air flow control valve, for example for control of air of a ventilating flow in a vertilation system comprises an axially extending valve casing having a venturi-shaped inner face, and an axially movable valve member movable within said valve casing to vary the air flow through the valve. In order that the control movement of the valve member may vary the volume of air flow through the valve according to the same predetermined function regardless of the pressure drop across the valve, or the system in which it is incorporated, the valve casing is shaped to compensate for the variation of the drag coefficient of the valve resulting from movement of the valve member. The invention also comprises a method for determining the required dimensions of a valve casing incorporating such correction.

Abstract: A safety valve having an upright tubular body with an axial opening therethrough, a portion of the opening at the lower end forming a flow passageway, the body having outlet ports extending from the flow passageway to the external cylindrical surface, an end cap closing the upper end of the axial opening, an internal stem guide within the axial opening separating the lower flow passageway from an upper cylinder and having a reduced diameter axial opening, a plunger reciprocally positioned within the flow passageway, the plunger having an upwardly extending axial stem received in the stem guide and the plunger having a seaing surface on the lower end, a seating surface within the flow passageway between the inlet ports and the open lower end of the passageway, the seating surface being engaged by the plunger sealing surface when the plunger is in the downward, valve closed, position, a piston positioned in the upper cylinder, the piston being affixed to the upper end of the plunger stem, the body having a smal

Abstract: A valve for controlling or preventing fluid flow has a shut-off element controllably movable in an axial direction between a first position corresponding to a fully open condition of the valve and a second position corresponding to a fully closed condition of the valve,a valve seat with which the shut-off element is capable of fluid-tight sealing engagement when in the said second position,drive means operatively connected to the shut-off element and capable of controllably transmitting a drive to the shut-off element to effect the said controlled movement thereof towards one of either of the said first and second positions thereof,said drive means including a connecting member transmitting the drive to the shut-off element, the shut-off element moving relatively to said connecting member in said axial direction when driven by said drive means, and furthermore being moved axially when said connecting member is moved axially,a housing defining a chamber,a diaphragm within said chamber and having a central regi

Abstract: A straight flow seat valve, comprising, a valve housing with a valve chamber therein having an inlet at one end and an outlet at the opposite end which is coaxial with the inlet. A control cylinder is supported in the valve chamber between the outlet and inlet and has a control fluid inlet extending out of the housing for the admission of a control fluid into the chamber in order to move a piston against a spring-biasing force so as to shift a seat body having a seat surface in engagement with a seat adjacent the outlet end so that it is lifted off the seat to open the valve. The seat body is advantageously streamlined at each end to permit flow around it from the inlet around the valve and out through the outlet. In the pressureless state, the spring urges the surface of the seat body onto the valve seat to close the valve.

Abstract: A valve for controlling fluid flow in a fluid system such as a pipeline which includes a body defining an internal chamber in fluid connection with an inlet and an outlet. The valve further includes a deformable valve liner mounted within the chamber which sits against a valve seat and a frustoconical grill having a plurality of ports therein. The liner and the body define a control chamber which is coupled to a source of controlled pressure. A relief region is provided between the liner and the grill at the plane of intersection of the liner and the grill.

Abstract: A double-acting closure valve for use in a coaxial flow system consists of an inner pipe having an inner wall surface including surface portions which are profiled so as to provide a pair of inner valve seats spaced apart axially from one another, an inner body disposed coaxially within the inner pipe and having associated therewith a pair of inner valve closure members movable generally axially so as to abut the inner valve seats and an outer pipe coaxial with the inner pipe and having an inner wall surface including surface portions which are profiled so as to provide a pair of outer valve seats spaced apart axially from one another, an outer wall surface of the inner pipe also including surface portions each of which is profiled to enable one of a pair of outer valve closure members associated therewith to move generally axially so as to abut an outer valve seat.

Abstract: A servo operated throttling control valve for controlling fluid flow in a fluid system such as a pipe line includes a body defining an internal chamber in fluid communication with an inlet and an outlet fabricated in the body. The valve further includes a deformable valve element mounted within the chamber that, in the valve closed position, seats against a valve seat and a rib grill defined in the chamber. The valve element and the body define a control chamber adapted to be coupled to a source of control pressure. The configuration of the body is fluted to accommodate bolt patterns employed in different flange ratings.

Abstract: A fluid operable valve suitable for use in high temperature and pressure environments involving the flow of solids material, incorporates a main valve member and a pilot valve member co-operable with separate seats axially spaced apart in association with the inlet of the valve. The arrangement is such that in operation the pilot valve member is sequenced to close against its seat prior to the main valve member which is purged prior to closure by a gas to remove particles of material which might cause ineffective sealing.

Abstract: A valve is disclosed wherein a valve member is disposed in the chamber of a valve body in such a way that the valve member is axially displaceable so as to open or close the valve, and a pilot cylinder is provided in order to encounter the unbalanced force acting on the valve member due to the difference in pressure between the primary and secondary sides of the valve. When the valve is wide opened, the liquid flows at the same speed, and the pressure loss is reduced to such an extent as almost equal to the pressure loss of a gate valve in wide opened position.

Abstract: A fluid flow control device which incorporates a ring or annulus of resilient material which may be deformed to effect a variable closure with a centrally disposed member, thereby controlling fluid flow through the device. The device is also capable of effecting a "fail-safe" metal-to-metal seal should the resilient element be damaged or a metal-to-metal seal be desired for shutting off flow through the device.

Abstract: A valve with a tubular valve body having two axially deformable bellows disposed between two flanges and flanking an annular seat which is movable axially of the body to thereby change the effective cross-sectional area of an annular passage between its internal valve surface and the valving surface of a valve element which is secured to one of the flanges by several ribs and is spacedly surrounded by the body. The device or devices which serve to move the seat relative to the valve element are located outside of the body.

Abstract: A shutoff element comprising a substantially tubular-shaped outer housing and an axially symmetrical inner housing connected by means of rib-like carriers or supports with the outer housing. The axially symmetrical inner housing serves for receiving at least one closure body which can be displaced in axial direction by means of an associated double-acting work cylinder. Each work cylinder is arranged within the inner space of an inner body formed by the inner housing and the inserted closure body in the open position of the shut-off element and is attached to the inner housing. In the free space about the work cylinder there open inlet openings for a cooling medium, the outlet openings of which, in the direction of flow of a work medium, are formed by a ring-shaped opening between the inner housing and the free end of the closure body.

Abstract: A fluid flow control valve to be interposed in the depending end portion of a large diameter casing projecting downwardly below the ocean thermocline and forming a cold water passageway for moving water to the surface. The valve includes a jacket surrounding the casing and spanning a transverse partition and ports in the casing wall above the partition. A control line supported sleeve valve, having a length at least equal to the spacing between the partition and upper limit of the casing ports, is coaxially disposed in the casing and includes upper and lower floatation chambers slidably contacting the inner surface of the casing wall and spaced-apart a distance at least as great as the vertical extent of the casing ports. Inflatable seals, surrounding the floatation chambers, are selectively inflated with the floatation chambers to provide buoyancy and for opening and closing the passageway in accordance with the position of the sleeve valve.

Abstract: A sleeve valve for pipelines has a fixed sleeve with inlet end open and outlet end closed, and openings in its side wall. A movable sleeve open at both ends is slidable in the fixed sleeve to open and close the openings. The improvement is that the inner sleeve also has openings in its side wall, and one or more ring-shaped partition plates are disposed at substantially equal intervals between the outer wall of the movable sleeve, and the inner wall of the fixed sleeve.

Abstract: Fluid flow control devices comprise a cylinder and a piston movable therein in accordance with the pressure at the outlet of the device. The piston rod is fixed to a regulating sleeve which moves with the piston to enlarge or restrict a passageway from the inlet to the outlet in accordance with the outlet pressure. In several of the described embodiments, the regulating sleeve is also effective to completely close the passageway and thereby to act as an on-off valve, should the upstream water flow be terminated.

Abstract: A pressure-relief valve especially for use in dams and other hydraulic-turbine installations has a deflecting member that diverts an axially flowing stream outwardly at the discharge side of the valve. This valve has two fluid-operated servomotors, one responding to the water pressure in the system and the other to the pressure of a control fluid. These servomotors are hydraulic cylinders mounted on diametrically opposite hollow ribs inside the housing of the valve body and have pistons interconnected by a common piston rod. An indicating rod extends radially from this piston rod through one of the hollow ribs, and the feed lines for the two cylinders also extend out through these ribs.

Abstract: An adaptor assembly including an adapter body having a fluid passage extending therethrough with a poppet valve movable between open and closed positions. The poppet valve is supported on a valve stem having a gear rack thereon. A shaft extends into the adapter body and supports a manually movable handle exteriorly of the adapter body. A pinion engaging the gear rack is supported on the shaft through a lost motion connection so that the poppet valve may automatically open as the pinion rotates independently of the shaft yet may be opened as the pinion is rotated by the shaft.

Abstract: A disk valve which may be rapidly closed through the action of the pressure of the working medium flowing therethrough includes pistons in cylinders on the upstream and downstream sides of the disk and channels for conveying the working medium pressure to the pistons to aid in opening and closing the valve. The channels may include valve means for conveying the pressure to and for venting it from the cylinders as well as a bore through the valve disk itself to connect the upstream side of the disk with the downstream cylinder.

Abstract: A valve including rotor means of which position is rotatably fixed within tubular flowpassage means; rotating magnetic field generating means fixedly positioned around said rotor means; first screw means which are rotated coaxially with the rotor means together with the latter; second screw means which engage the first screw means and are movable in an axial direction of the screw without being rotated for itself by the rotation of the first screw means; valve body means connected to the second screw means; and valve seat means in engagement with the valve body means, whereby the rotor means are rotated by the action of the rotating magnetic field generated by the rotating magnetic field generating means, said rotation causes the second screw means to be moved in an axial direction of the screw, and said movement is transmitted to the valve body to adjust a degree of opening and closing of the valve.