Abstract: One illustrative embodiment of a valve disclosed herein comprises a body (12), a valve stem (22) that comprises a combination threaded-splined section (22X) and an unthreaded section (22Y) wherein the combination threaded-splined section (22X) comprises at least one spline (22S) and a thread (22Z). The valve (10) also comprises an anti-rotation ring (26) that includes at least one tab (26T) positioned in the at least one spline (22S) of the combination threaded-splined section (22X) and a threaded drive nut (24) that is adapted to engage the thread (22Z) of the combination threaded-splined section (22X).

Abstract: A poppet valve configured comprising a valve housing with line connections and a valve seat formed therebetween in the valve housing, and a closing element, which is axially displaceable in the valve housing and which cooperates with the valve seat, and a membrane extending around the closing element and from the latter up to a fixing site on the housing side. Due to the fact that a spring-elastic and in particular annular element is additionally provided for fixing the membrane under preload on the housing side, and due to the fact that the spring-elastic element is subdivided towards the sealing fixing site into partially circumferential segments having formed thereon extensions, which press the membrane against the cylindrical fixing site and, in so doing, deform the membrane.

Abstract: A valve device which improves the operability of a valve for opening and closing a flow path. The valve device includes a valve, an actuator, an actuator support member, an operating portion, and a threaded member wherein the valve is able to open and close a fluid path in a valve body having a fluid inflow passage and a fluid outflow passage. The actuator displaces the valve between an open position and a closed position. The actuator support member operatively supports the actuator so that the actuator is able to be driven. The operating portion drives the actuator. The threaded member is threadedly engaged with the actuator.

Abstract: Apparatus, including or forming part of a diaphragm valve, features a diaphragm; a compressor or spindle component; and at least one hourglass-stud having a head configured to couple to the compressor or spindle component, having a lower shaft configured to couple to the diaphragm, and having an upper shaft configured to couple together the head and the lower shaft, the head having opposing curved surfaces configured and dimensioned with a width so as to be substantially the same as the diameter of the lower shaft, the upper shaft having a diameter configured and dimensioned so as to be smaller, including slightly smaller, than the width of the opposing curved surfaces of the head.

Abstract: A diaphragm valve features a valve body having a fluid flow channel with a weir portion to control the flow of fluid through the fluid flow channel; a diaphragm that responds to a closing or force to make sealing contact with the weir portion to interrupt said flow, or to release the sealing contact with the weir portion to allow the flow; a compressor configured to apply the closing or force in order to interrupt or allow the flow; and two studs configured to: couple the compressor and the diaphragm together, attach to the diaphragm to provide attachment points on the diaphragm on each side of the weir portion, and respond to the closing or opening force so the attachment points on both sides of the weir portion cause the diaphragm to make sealing contact with the weir portion or cause the sealing contact to be released.

Abstract: A visual position indicator for a valve includes a knob and inner and outer sleeves. The knob is rotatably mounted on the valve and is attached to a stem operating to open and close the valve. The inner sleeve connected on the valve includes a first colored band and an outer thread portion. The outer sleeve engaged with the knob includes a second colored band and an inner thread portion. The outer and inner thread portions are engaged with each other. The first and second colored bands respectively have a color different to each other. While the valve is closed, the outer sleeve fully conceals the inner sleeve to cause the second colored band to be visible. While the valve is open, the outer sleeve is fully concealed by the knob to cause the first colored band to be visible.

Abstract: A female screw member includes a female screw part with a female screw, and a projection part projecting in the direction of a center shaft of the female screw and having a working face in the rotating direction centering on the center shaft. The female screw part and projection part are integrally molded with a resin. The projection part has a spiral inclination face spirally inclining by one round from the working face centering on the center shaft of the female screw. The height H of the working face is equal to or smaller than a pitch P of the female screw. Using the projection part as a fully opening fixing stopper, a motor operated valve includes a valve main body having a valve seat, the female screw member attached to the valve main body, a motor having a rotator and stator, and a valve shaft. The valve shaft is screwed to a female screw of the female screw member, and is rotated and driven by the rotor, and has a fully opening movable stopper capable of contacting the fully opening fixing stopper.

Abstract: A manually operated actuator is provided with an over-travel feature. The over-travel feature may be realized with a controlled thread backlash or with a biasing member such as a Belleville spring. When used with a flow control device such as a diaphragm valve, the over-travel feature allows the valve to open and close at actuator positions other than full stop positions. Embodiments for manual actuators and hybrid actuators are presented.

Abstract: An assembly for actuating a valve that is in a differential screw assembly when the valve is in a portion of its stroke that experiences high resistance. The actuating assembly is selectively changeable into a direct drive configuration when the valve is in a lower resistance portion of its stroke. A sliding sleeve moves axially within the actuating assembly and has a profile that is strategically dimensioned to change the actuating assembly configuration.

Abstract: To provide a motor-driven valve with a small number of parts, with excellent assemblage, capable of maintaining a large valve port diameter even downsized, and to prevent deterioration of housing environment due to sound caused by the impact and shortened life that are generated by collisions of closing limit stopper parts.

Abstract: An assembly for actuating a valve that is in a differential screw assembly when the valve is in a portion of its stroke that experiences high resistance. The actuating assembly is selectively changeable into a direct drive configuration when the valve is in a lower resistance portion of its stroke. A sliding sleeve moves axially within the actuating assembly and has a profile that is strategically dimensioned to change the actuating assembly configuration.

Abstract: A flow control valve is provided in a manner to be capable of locking a position of a differential screw easily without displacing a position adjusted valve element body. The valve element body is brought into or out of contact with a valve seat provided between a first port and a second port, and is connected to an operation member. The operation member is movably inserted into a cover and urged to a direction toward the valve seat by an urging member. A position of the operation member is adjusted by a differential screw, and accordingly a position of the valve seat is adjusted. A rotation member for exerting a rotation force on the differential screw is slidably mounted in the cover along a moving direction of the operation member without rotating. A locking portion is provided in the rotation member to engage with the cover without rotating when the operation member is slid along its moving direction.

Abstract: A valve arrangement includes a valve body defining an enclosure, having a bonnet connected to the valve body. A stem is rotatably attached to the valve body and positioned at least partially within the valve body. A handle is in operable communication with the stem and configured to rotate the stem. An actuation portion is positioned distal from the handle and in direct or indirect contact with the stem, wherein the actuation portion is configured to move when the stem is rotated. The stem includes a first thread portion and a second thread portion, the first thread portion having a first thread pitch and configured to interact with and move the actuation portion. The second thread portion is in communication with the bonnet having a second thread pitch and configured to move the stem with respect to the body. The second thread pitch is smaller than the first thread pitch.

Abstract: A motor-operated valve has a rotor unit in a can, and is rotationally driven by a stator unit. The rotation of the rotor unit is transmitted to a screw feed member. A stem member fixed to a valve body is engaged threadedly with the screw feed member by a first screw portion. At the same time, the screw feed member is engaged threadedly with an external thread portion fixed to a valve stem by the second screw portion. The first screw portion and the second screw portion constitute a differential screw mechanism, and feeds the valve stem according to a difference in pitch.

Abstract: The invention discloses a tap (10) for controlling liquid flow. The tap (10) has a tube (14) with first (16) and second (18) opposite open ends, an inlet opening (20) leading into the tube between the first and second open ends, and an outlet opening (16) defined by the first open end (16), which outlet opening (16) serves as an outlet from the tube (14). The tap (10) further includes a first valve seat (36), formed between the inlet opening (20) and the outlet opening (16), and a second valve seat (38), formed between the inlet opening (20) and the second open end (18). A closure member (42) is sealingly slidably movable in the tube (14) and is provided with a first circumferential sealing edge (60), the first sealing edge (60) being adapted to removably abut against the first valve seat (36). The closure member (42) is further provided with a second circumferential sealing edge (66), the second sealing edge (66) being adapted to removably abut against the second valve seat (38).

Abstract: A adapter provides for connection of a pressure relief mechanism to a connection fitting portion of a quick connect fitting through a mating connection fitting portion and provides for movement of the pressure relief mechanism against a check valve in a hydraulic fluid conduit through a screw thread connection to the adapter. When the check valve is thus opened fluid flow is provided substantially axially through the pressure relief mechanism, thereby reducing the likelihood of disengagement of respective portions of the quick connect fitting when hydraulic fluid is present. Collection of hydraulic fluid in a vessel connected to the pressure relief mechanism is provided to allow recycling of the fluid and to prevent release of the fluid into the environment.

Abstract: The invention discloses a tap (10) for controlling liquid flow. The tap (10) has a tube (14) with first (16) and second (18) opposite open ends, an inlet opening (20) leading into the tube between the first and second open ends, and an outlet opening (16) defined by the first open end (16), which outlet opening (16) serves as an outlet from the tube (14). The tap (10) further includes a first valve seat (36), formed between the inlet opening (20) and the outlet opening (16), and a second valve seat (38), formed between the inlet opening (20) and the second open end (18). A closure member (42) is sealingly slidably movable in the tube (14) and is provided with a first circumferential sealing edge (60), the first sealing edge (60) being adapted to removably abut against the first valve seat (36). The closure member (42) is further provided with a second circumferential sealing edge (66), the second sealing edge (66) being adapted to removably abut against the second valve seat (38).

Abstract: A pressure regulator assembly usable in, as an example, a multiple channel high throughput purification system. The pressure regulator assembly includes an inlet line and an outlet line connectable to a fluid channel. A regulator body has a regulator inlet connected to the inlet line and a regulator outlet connected to the outlet line. The regulator body has a chamber therein in fluid communication with the regulator inlet and outlet. A nozzle is in fluid communication with the regulator inlet and has a nozzle outlet adjacent to the chamber. A stem is axially aligned with the nozzle outlet and has a regulating surface adjacent to the nozzle outlet to restrict the fluid flow through the chamber to the regulator outlet. A mounting rod is attached to a mounting portion on the stem. The mounting rod and stem are axially moveable in the regulator body relative to the nozzle outlet.

Abstract: A rotary-to-linear converter for use with a valve actuation device having a linear reciprocating cam shaft having longitudinally extending cam grooves that are engaged by captive cam followers which oscillate up and down in response to sideways reciprocation of the camshaft for actuating intake or exhaust valves of internal combustion engines or other devices employing reciprocating pistons and valves. The camshaft is caused to reciprocate by a rotary linear converter of the “yankee” type composed of double helix channel at the extreme end of the camshaft and a rotary drive collar having two sets of diametrically opposed guide members. The guide members comprise dogs which are rotatably engaged with the drive collar and slidably engaged with the double helix channel of the cam shaft.

Abstract: A gas tap comprising an external operating element and a connecting stem for transmitting the movement of the operating element to the opening and closure member which is arranged in such a way as to be held against the sealing seat under the effect of the pressure of the gas. To make opening against the pressure of the gas easier, the operating element comprises a cylindrical sleeve which has a first screw thread that makes the sleeve move axially when the operating element is turned and a second screw thread of opposite hand to the first screw thread and with different screw pitch so as to alter the effect brought about by the first screw thread.

Abstract: A valve activation device having a linear reciprocating cam shaft having longitudinally extending cam grooves that are engaged by captive cam followers which oscillate up and down in response to sideways reciprocation of the camshaft for activating intake or exhaust valves of internal combustion engines or other devices employing reciprocating pistons and valves. The camshaft is caused to reciprocate by a rotary linear converter of the "yankee" type composed of double helix channel at the extreme end of the camshaft and a rotary collar having two sets of diametrically opposed guide members.

Abstract: A micro-valve assembly for providing precise regulation of fluid flow between an input port and an output port comprises a valve body configured to installed with the valve assembly and forming therewith a fluid flow chamber between the fluid flow rate control port and the output port, the valve body having an internally threaded cylindrical portion. A rotatable valve adjustment member has an externally threaded cylindrical portion sized to engage the internally threaded cylindrical portion of the valve body. The externally threaded cylindrical portion of the rotatable valve adjustment member has an internally threaded axial bore. The internally threaded bore of the rotatable valve adjustment member has a longitudinal axis and a pitch finer than that of the externally threaded cylindrical portion thereof.

Abstract: A diaphragm valve includes a valve body accommodating an axial valve stem and housing a weir-type valve seat which cooperates with a diaphragm operated by a hand wheel for regulating a flow of fluid through the weir. A screw nut extends axially between the valve body and the hand wheel for limiting a closing lift of the diaphragm by impacting on the valve body. The screw nut is connected in form-fitting manner with the hand wheel so as to follow a displacement of the valve stem when turning the hand wheel for opening and closing of the valve.

Abstract: In a diaphragm type control valve, a slide stem (14) having a coupling screw part (14a) is elevatably but non-rotatably inserted into a bonnet (11) having a coupling screw part (11c). A rotary stem (15) has concentrically a first coupling screw part (22) of thread pitch P1 inside, and a second coupling screw part (23) of thread pitch P2 larger than the thread pitch P1 outside is coaxially disposed above the slide stem (14), the first coupling screw part (22) being driven into the coupling screw part (14i c) of the slide stem (14), and the second coupling screw part (23) into the coupling screw part (11c) of the bonnet (11), so that the slide stem (14) is moved vertically by a small distance at each revolution of the rotary stem (15).

Abstract: A valve body includes a cylindrical seat having a substantially flat working face. A cylindrical valve member having a working surface thereon is slidable toward and away from the seat face to vary flow from the outer peripheries of the seat and valve member into an orifice extending into the seat and in communication with the seat face. The valve member is mounted on a stem which is in threaded engagement with the radially inner surface of an annular member. The outer surface of the annular member is in threaded engagement with the valve body. The inner threads have 12 threads per inch and the outer threads have 11 threads per inch thereby moving the valve stem 0.0075 inches per 360.degree. revolution of the annular member.

Abstract: A plug or poppet valve is positioned in relation to an opening for controlling flow through the opening, with a flange positioned over the side opening and having a portion extending into the interior of the housing towards the plug or poppet, said flange and its extended portion having a circular cross-section opening therethrough, said opening having an interior pre-determined pitch thread over a lower portion of its length.

Abstract: A dual valve plug stem actuator device for plug or globe type valves is disclosed wherein said actuator mechanisms provide respectively coarse and fine independent movement of the valve plug stem. One actuating device controls the movement in the axial direction of the valve plug stem relative to and onto a valve seat port by the rotational movement of the threaded valve plug stem through the internal threads of an internally and externally threaded actuator nut. The other of the actuating devices controls the movement of the valve plug stem relative to and onto a valve seat port through the rotation of the internally and externally threaded valve actuator nut where rotation of the actuator nut causes movement in the axial direction of said actuator nut in relation to the stationary valve body and where the axial displacement of the actuator nut causes the same relative axial rotationless displacement of the valve plug.

Abstract: A valve control having a valve body (5) with an actuator stem (16) and a rotating handle (35) connected to the actuator stem by differential drive mechanism (25, 26) which, during uniform movement of the handle in one direction, initially opens the valve (20) at a relatively slow rate and, thereafter, completes the valve movement at a substantially faster rate. A series of stop rings (44-48) are received about the body in frictional abutting relationship and serially rotated by the handle to uniformly resist handle movement independently of the extent of handle movement.

Abstract: A valve device comprises a valve body having an inflow passage and an outflow passage, a valve seat fixed to the valve body at a position between the passages, a valve element for seating against and separating from the valve seat, a valve stem movable together with the valve element toward and away from the valve seat, a stem holding member secured at a portion thereof to the valve body in the body interior and holding the valve stem at a screw engagement part therewith where a surface at an extremity of the portion of the stem holding member is in abutting contact with a surface of the main body thereby to form a first metal-contact seal, a bonnet which is detachably fixed to the valve body with a sealing member interposed therebetween, and through which the valve stem is rotatably fitted, where the bonnet covers the remainder portion of the stem holding member, and a mechanism for forming a second metal-contact seal at a stem holding part of the stem holding member when the valve is in the fully opened sta

Abstract: A valve comprising a hollow cylindrical body with a valve opening at one end and a valve seat around the valve opening. A valve member is movable towards and away from the valve seat on a spindle which passes through a spindle opening opposite the valve opening. A handle is provided on the outer end of the valve spindle and has a screw-threaded counterbore which is engageable with a screw-threaded spigot on the outside of the valve around the spindle opening to hold the valve member in the closed position. In this position the end face of the valve member is flush with the outside of the valve around the valve opening. The upper side of the valve member has a screw-threaded counterbore engageable with a screw-threaded spigot on the inside of the valve around the spindle opening to hold the valve in the open state and form a seal around the spindle.

Abstract: A faucet valve for kitchen sinks, bathroom washbasins and like applications, said faucet valve being adapted to be made of molded plastics, having relatively few operative parts, and designed to minimize the stresses of assembly and use. The invention has two principal features: the first is the use of a ratchet interlock between the bonnet of the valve and the cover plate of the sink or washbasin, said interlock being oriented to allow the bonnet to be rotated in one direction relative to the valve body in order to thread the bonnet into engagement with the valve body, and to prevent the bonnet from rotating in the opposite direction relative to the valve body when the valve is in use; and the second is the use of a self-centering valve closure member in the form of a spherical ball mounted within a spherical socket with sufficient clearance between them to enable the ball to float relative to the valve seat.

Abstract: Rotary valve comprising a rotatable stem having a valve disk fixed thereto and disposed within a valve case, a slidable tube and a rotatable tubular member each positioned coaxially with the stem and connected to the valve case, first screw-thread means for holding the stem and the slidable tube in screw-thread engagement with each other, and second screw-thread means for holding the slidable tube and the tubular member in screw-thread engagement with each other, the first screw-thread means having a larger lead angle than the second screw-thread means, so that the rotation of the tubular member rotates the stem of the valve disk.