Abstract: A valve includes a valve body (1, 2), a tube (3) made of an elastomer extending through the inside of the valve body, and a roller (23) and a pressing surface (14) disposed facing each other across the tube (3). The roller (23) can be brought close to the pressing surface (14) to collapse the tube (3) between the roller (23) and pressing surface (14) and close the flow passage in the tube (3), and the roller (23) can be moved along the tube (3) to make a collapsed position where the tube (3) is collapsed by the roller (23) and the pressing surface (14) move along the flow passage axis of the tube (3) while maintaining the flow passage in the closed state.

Abstract: The device includes a spindle rotatably supported perpendicular to a value displacement direction and is made of a first spindle part and a second spindle part. The two parts are provided with outside threads configured in opposite directions to each other. On the first spindle part, a first nut having a complementary inside thread is applied. On the second spindle part, a second nut having a complementary inside thread is applied. The first nut includes a first bearing for the rotatable support of one end of a first connecting rib. The second nut comprises a second bearing for the rotatable support of one end of a second connecting rib. The other end of the first connecting rib and the other end of the second connecting rib are rotatably supported on a third bearing. Parallel to the spindle, on the side thereof facing away from the valve member, a stop is provided for the first nut and for the second nut, the stop surface extends perpendicular to the displacement direction of the valve member.

Abstract: The present invention provides a water flow control valve, which has an improved structure, thus reducing manufacturing costs and increasing the reliability of products. To achieve the above-mentioned purpose, the water flow control valve includes synchronous motors (20), which generate drive forces in directions opposite each other, an eccentric cam (30), which is provided between the synchronous motors (20) and converts a direction in which the drive force is transmitted, a power transmission unit (50), which is in rolling contact with the eccentric cam and adjusts the amount of fluid that flows through a housing using operation of the eccentric cam, and ratchet gears (40), which are provided between the synchronous motors and the eccentric cam and transmit the drive force of one of the synchronous motors while preventing the drive force of the remaining synchronous motor from being transmitted in a no-load operation manner.

Abstract: A fluid chamber couples cylindrical input and output lines. The chamber has a closed lower end and an open upper end. A closure plate covers the upper end. The plate has a primary and secondary slots. A finger assembly has primary and secondary fingers. The fingers extend through the slots with upper ends of the fingers above the chamber and lower ends within the chamber. A block, fabricated of elastomeric material, couples the fingers at intermediate extents of the fingers. The block is positioned upon the closure plate. The elastomeric material covers the lower ends of the fingers. An aperture has a spacer. The aperture is formed in the lower end of the primary finger in axial alignment with the output line. A drive mechanism moves the upper ends of the fingers to pivot the lower ends of the fingers.

Abstract: A disclosed on-off valve includes a valve body having two openings that may place a process chamber and an evacuation apparatus in pressure communication with each other; a closure element located inside the valve body and adapted to close one of the two openings; a seal member provided in the closure element and adapted to seal the one of the two openings when the closure element closes the one of the two openings; a linear motion driver that linearly moves the closure element; a retreat portion located away from the two openings; and a pivotal motion driver adapted to pivot the closure element between a first position corresponding to the one of the two openings and a second position corresponding to the retreat portion; wherein the closure element is moved to the retreat portion by the linear motion driver and the pivotal motion driver in order to stay at the retreat portion when the closure element is away from the one of the two openings.

Abstract: Actuator stem guide apparatus for use with fluid valve actuators are described. An example actuator stem guide apparatus includes a base having an opening to allow an actuator stem of the fluid valve actuator to tilt or lean within the base to enable a lever of the fluid valve actuator to rotate and a guide receiving area adjacent the opening of the base. A guide is coupled to the guide receiving area and the guide has a bearing surface to slidably engage the actuator stem to limit lateral movement of a diaphragm assembly relative to a longitudinal axis of the opening to prevent the diaphragm assembly from engaging an inner surface of an actuator housing as the actuator stem moves between a first position and a second position.

Abstract: A waste gate actuator for an exhaust gas turbocharger, including an actuator housing and an actuator cover, an element for actuating the waste gate valve and electronic components for controlling the element to actuate the waste gate valve being arranged in the waste gate actuator. Provided is a simple and inexpensive revolution counting system on the turbocharger which allows the number of revolutions of the rotating parts (turbine wheel, compressor wheel, turboshaft) to be detected without substantial constructional alterations to the design of existing turbochargers. A sensor for detecting the variations in a magnetic field that are produced by the rotation of the rotating parts is arranged in or on the actuator housing or in or on the actuator cover.

Abstract: A pilot valve assembly comprised of a pilot valve proper employing a spool to be displaced in a valve casing to bring a hydraulic pressure port and an output port into and out of communication with each other, an operation means having an operating lever with a cam member attached thereto, a pivoting shaft erected on an end plate of the pilot valve proper and connected with the manual operating lever through a universal joint, and a boot of a resilient material hermetically connected between the operation means and the end plate in such a way as to completely enshroud said universal joint, cam member and pusher, the end plate being detachably fixed to the mount member, and the boot having one end thereof connected to the operation means and having the other end hermetically gripped between the end plate and the mount member.

Abstract: A water controlling valve includes an outer sheet, an end cap and a control valve group. The control valve group is disposed between a flowing bore in the outer sheet and a water bore in the end cap. The water controlling valve is connected with the outlet of a water tube. When the control valve group is pushed upwards, the water bore in the end cap and the flowing bore in the outer sheet are closed in a predetermined sequence, then the water in the tube will not flow out. When the control valve group is pushed downwards, the flowing bore in the outer sheet and the water bore in the end cap are opened, then the water will flow out. When the water is stopped, the occurring positive or negative pressure wave is lowered, and then the vibration and the raspy noise will be avoided.

Abstract: Between a driving base operated by an air cylinder and a lever member fixed to a valve shaft integral with a valve plate, a connecting mechanism for connecting the driving base and a lever member, capable of displacement, and a cam mechanism for tilting the lever member are interposed, and a stopper mechanism for stopping the lever member at an opposing position of the valve plate or a full-open position, and after the lever member is stopped by the stopper mechanism at the opposing position or the full-open position, the lever member is tilted by the cam mechanism so as to incline the valve plate and to press a valve seal to a valve seat portion or a wall face in the periphery of an opening.

Abstract: A valve actuator (1) for converting a reciprocating rectilinear motion into a reciprocating angular rotary motion and/or vice versa, including a pivot (2) for generating an angular rotary motion about its axis (A5), a slider (7) linearly sliding in at least one guide (6) which defines an axis (A1) perpendicular to the axis (A5). The pivot and slider are connected together by elements (11, 12) for rotary-to-rectilinear motion conversion or vice versa, the elements including a pin (12) integral by one end to the pivot (2), whereas the other end slides within a sleeve (11) which freely pivots at (C) on the slider, about an axis (A3) perpendicular to the axis (A3) perpendicular to the axis (A1); any rotation of the pivot (2) about the axis of rotation (A5) parallel to (A3) corresponds to an identical angular rotation of the pin which in turn drives the slider and/or vice versa.

Abstract: An extensible straw for incorporation as an integral component of a disposable or collapsible beverage container has telescoping tubes extensible from the container, a screw cap and multiple seals preventing inadvertent leakage from the container whether the container is maintained upright or not.

Abstract: A Pendulum Valve having Independently and Rapidly Controllable Theta- and Z-axis Motion. The valve actuator used in the present invention provides the benefit of wide open unrestricted flow of a pendulum valve coupled with the high-resolution and wide dynamic range flow throttling of a ball or butterfly valve. The actuator mechanism will include motor drives and associated control system so that the drives are closely coupled to give highly controlled motion. The drive assembly introduces a concentric shaft arrangement that, when coupled with the highly controllable motor drives, exploits a cam-follower arrangement to make the relative rotation between the two concentric shafts result in highly controlled theta and z-axis motion. Finally, the plate to seal spacing afforded is greater than previously possible with prior valve actuator mechanisms, thereby substantially reducing flow turbulence through the valve as the valve plate eclipses the valve ports.

Abstract: A damper device may include a frame provided with an opening part, a baffle turnably supported on the frame, and a drive unit for turnably driving the baffle to open and close the opening part. The drive unit may include an output member whose tip end side is provided with an engagement part with the baffle and which is linearly advanced and retreated to and from the baffle to turnably drive the baffle. Further, the damper device includes a wall part provided between the driving part and the baffle and formed with an output hole part through which the output member is penetrated. The engagement part is located apart from a first moving extended axis which is formed by movement of the output member penetrating through the output hole part.

Abstract: A damper device may include a frame, a baffle turnably supported on the frame for opening and closing a passage through which fluid is passed, and a drive unit for turnably driving the baffle. The drive unit may include an output member whose tip end side structures a slide mechanism together with the baffle, and a driving part which causes the output member to linearly advance and retreat to and from the baffle. The slide mechanism includes a groove formed in one of a tip end side of the output member and the baffle so that the groove is extended to move the baffle, and a slider part provided in the other so that the slider part is fitted into the groove, and the groove is formed in which at least one of both end portions of the groove is formed in an open end.

Abstract: A damper device may include a frame, a baffle turnably supported on the frame, a drive unit for turnably driving the baffle, a first and a second turnable support parts for supporting the baffle on the frame, and a mechanical connecting part between the drive unit and the baffle which is structured at a position apart from a turning center axial line of the baffle. The first and second turnable support parts are structured by using a shaft part made of resin which is formed in one of the baffle and the frame, and a shaft hole which is formed in the other of the baffle and the frame. A passage through which cold air is passed is opened and closed by the baffle.

Abstract: A retaining cylinder is threadedly engaged with a fixed cylinder of a flow rate control valve, by means of a screw section formed on an outer circumferential surface. A fence cover, which is capable of expanding and contracting in the axial direction, is installed between the fixed cylinder and a float rod supported by the retaining cylinder. An upper seal member is provided on the float rod, on the upper side thereof with respect to a valve plug. A lower seal member is provided on the lower side thereof with respect to the valve plug. The upper seal member and the lower seal member have substantially identical diameters. The float rod is displaced under an energizing action of a stepping motor. The flow rate of a fluid is controlled depending on a distance of the valve plug with respect to a valve seat.

Abstract: An iris arrangement has first and second annular carrier elements annular elements coaxially arranged and circumferentially interlocked with one another so as to be independently rotatable. A plurality of iris elements each have a first compliant beam element coupled at a first end thereof to the iris element and at a second end thereof to the first annular carrier element, and a second compliant beam element coupled at a first end thereof to the associated iris element and at a second end thereof to the second annular carrier element. Rotatory motion of the carrier elements relative to each other results in substantially radial displacement of each of the iris elements. The plurality of iris elements communicate with one another when disposed in a radially innermost position. A web covers a region between the plurality of iris elements and the circumference of the first and second annular elements.

Abstract: An air-vented closure assembly for a fluid container has a valve body and a valve element. The valve body has first and second fluid conduits. The valve body has a mounting sleeve in fluid communication with the first and second fluid conduits. A valve member is positioned in the mounting sleeve for reciprocating movement from a closed position to an open position. The valve member has a wall having opposed ends, the valve member having a third fluid conduit therethrough. A first portion of the wall is removed to define an air inlet into the third fluid conduit and a second portion is removed to define an air outlet. When the valve member is in the closed position fluid flow through the first and second conduits is prevented, and when in the open position fluid can flow through the first conduit and air can flow through the air outlet.

Abstract: A valve has a valving element which is rotatably fitted within a valve body. This valving element of the valve is joined by a stem or shaft portion which extends out of the valve body to interact with an actuator and transmit torque to the valving element. In plug valves, pressure needs to be also applied to the valving element to insure a proper closure. The invention relates to a mechanism to adjustably seal the stem/body interface using only one screw that is positioned on the front of the valve cover for easy access. The force generated by the screw is transposed into a vertical force by a rotatable cam. The multiple faces of the cam are used to transmit the force vertically and horizontally and will maintain the mechanism in a straight position.

Abstract: A sealing valve is disclosed. The valve comprises a valve seat, a power element and an elevation section. The valve seat is provided with through hole from front to rear, and the upper end of the valve seat is connected to a guiding body having a guiding slot and a directional slot. The power element is mounted at the upper end of the valve seat to control the elevating movement of the elevation section. The elevation section is downward extended to mount within a sealing element. The sealing element is driven to the through hole to seal the hole or to be driven away from the through hole, this avoid wearing within the valve seat in the course of sliding.

Abstract: A valve assembly has a valve housing, an inlet, an outlet and a flow passage extending between the inlet and the outlet. A shut-off valve is mounted on the housing adjacent the inlet and a flow control valve is mounted on the housing adjacent the outlet. By mounting both valves on the same housing, the dimensions of the assembly are reduced.

Abstract: A diaphragm valve for compressed or liquefied gases, comprising a valve body which forms an inlet which can be associated with a pressurized gas cylinder and forms a gas outlet port. A closure port is provided between the inlet and the outlet port, and a gasket acts on the closure port and is supported by a flow control element, which engages the internal face of a diaphragm, on the outer face whereof there acts a pusher piston, which can be actuated by means of an external knob. Between the diaphragm and the pusher piston, at least one metallic disk being arranged which is not retained at its edges.

Abstract: A flush actuator assembly is adapted to fit existing valve bodies. The flush actuator assembly includes a plunger rod which is capable of displacing the relief valve post more or less to adjust the flow of water through the flush valve during a single flush. The relief valve post may be displaced different amounts by adjusting the actuator assembly such that the plunger rod contacts the relief valve post at different locations along the central longitudinal axis of the post. Additionally, the relief valve post may be displaced different amounts by providing a plunger rod that has a different range of travel. A method associated with displacing the relief valve post varying amounts is also disclosed.

Abstract: An apparatus, according to various aspects of the present invention, adjusts fluid pressure. The apparatus includes a body, a seal seat, a sphere, and an adjustment rod. The body includes an axis and an adjustment passage. The adjustment passage is positioned angularly to the axis. The seal seat includes an adjustment end portion. The seal seat is disposed in the body and moves along the axis. The sphere is disposed in the body and moves angularly to the axis. The sphere contacts the adjustment end portion of the seal seat. The adjustment rod includes a first end portion and a second end portion. The adjustment rod is movably disposed in the adjustment passage. The first end portion of the adjustment rod contacts the sphere. The sphere in cooperation with the first end portion of the adjustment rod and the adjustment end portion of the seal seat translates displacement of the adjustment rod into axial displacement of the seal seat. The adjustment end portion of the seal seat includes a groove having a ramp.

Abstract: A Scotch yoke actuator is disclosed with a dual yoke and a diagonally symmetric design. A pair of shafts and pushing devices apply equal, opposing forces to the yoke, causing end loading forces applied to a rotatable shaft attached to the center of the yoke to be cancelled. In embodiments, the weight of the pushing devices is balanced about the yoke, each shaft extends in only one direction from the yoke, and/or the shafts are supported only by the yoke and the pushing devices. In embodiments that use yoke pins, the yoke pins include rollers or bearings to reduce friction, and/or two pair of yoke pin slots support protruding ends of the yoke pins. The yoke pin slots can extend to edges of a yoke housing face, allowing easy shaft removal and reinstallation, and each shaft can include a split end with extensions on opposing sides of the yoke.

Abstract: A valve actuator including a body, a rotatable drive screw having an external thread over at least a portion of its length and extending through the body and projecting out at least one side of the body. An internally threaded member is captured on the drive screw on the interior of the body, the member being held against rotation during rotation of the drive screw, so as to cause the member to travel along a length of the drive screw as the drive screw is rotated in both a first and second rotational direction. At least one sleeve having an abutment surface engagable by the member upon a sufficient rotation of the drive screw in one of the two directions. The sleeve surrounds the drive screw and may be axially adjustable relative to the drive screw from the exterior of the body.

Abstract: A well choke has a quick closure device quickly moving the choke element to a closed position. The closure device mounts between an actuator and a choke. The actuator has a stepper motor and gear train for incrementally moving an actuator rod and a choke element linearly. The quick closure has a hydraulic cylinder that will move the entire actuator, including the actuator rod, toward the choke, when actuated.

Abstract: A device for closing or opening an opening, in particular a filling or bottom opening (11) of a material bunker (12) arranged above the furnace throat of a blast furnace, including a tilting disk (10) connectable to a drive. The tilting disk (10) is articulated to two swivel arms (15, 16) pivotably mounted about two swivel axes (13, 14) extending parallel to each other, and to be more precise, in such a manner that the edge areas of the tilting disk (10) situated on a perpendicular to the swivel axes (13, 14) of the two swivel arms (15, 16), upon a movement of these arms, move from the closed into the opened position, and vice versa, along oppositely directed arc paths (23, 24).

Abstract: A gate valve includes a valve main body having a gate valve body attached to a valve rod; a movement operation mechanism that moves the valve rod in a direction along an axis of the rod up to a position where the gate valve body stops up a flow passage port used for carrying in and out objects; a rotating motion mechanism for rotating the valve rod, which has been moved to that position, by a predetermined angle; and a horizontal drive gear for moving the valve body in a direction orthogonal to the direction of movement of the valve rod to seal the flow passage port.

Abstract: An electric control device (10) for a flushing system, of the type that includes an axial valve (18) whose shutter (22) is controlled by an axial rod (24) that is capable of being moved radially by a finger (26) actuated by an electric actuating device (32). The electric actuating device (32) includes at least one connecting rod (34) of which a first end (36) is articulated by a pivot (38) to the second end of the finger (26) and of which the second end (44) is articulated by a pivot (40) on an eccentric (42) moved by an electric motor (46), in order to generate a back-and-forth movement of the first end (28) of the finger (26) actuating the rod (24) of the shutter.

Abstract: An emergency shower system for attachment to a water pipe located behind a wall and a valve mounted to the pipe. The system includes a frame mounted to the wall around the valve, a panel connected to the frame for covering an opening in the wall to expose the valve, the panel having an opening, a plate mounted to the panel to close the panel opening and a handle mounted to the plate. The system also includes a linkage pivotally connected to the plate and to the valve, such that vertical movement of the handle and plate are translated to rotational movement by the linkage so as to operate the valve. There are no openings apparent in the front of the shower system. The handle only moves vertically and at a constant distance of about one and a half inches from the wall. An eye/face wash station may be included with the shower. The eye/face wash station includes a pull down tray with two spray nozzles. The nozzles are connected to another valve which is opened by the rotation of the pull down tray.

Abstract: An actuator element suitable, for example, for actuating a rotatable disk or a flap valve shaft. The actuator includes a housing, a drive situated in the housing, and at least one position detector, in which a movably mounted piston rod in the housing is operatively connected to the drive for exerting a force effect, and in which the position detector includes at least one stationary Hall sensor and at least one magnet movable relative to the Hall sensor such that the magnet produces a magnetic field for generating a magnetic flux.

Abstract: A switch mechanism for a pneumatic tool comprises a choke ring having an air hole disposed in an air passage of the pneumatic tool; A control rod is swayably inserted through the air hole with a first end of corresponds to a trigger of the pneumatic tool; A choke member is provided for insertion of a second end of the control rod and pushed by a spring to seal the choke ring. A bushing is disposed in an air passage and located between the choke member and the inner wall of the air passage of the base body and between the choke member and the choke ring. By such arrangement, the inner wall of the air passage of the base body and the choke ring can be avoided from being abraded by the choke member.

Abstract: A valve operator is provided having a rotatable spindle extending along an axis. The rotatable spindle is rotatable about the axis. The rotatable spindle is additionally pivotable about a first pivot point. A pivotable linkage operably couples with the spindle. The pivotable linkage is pivotably movable about a second pivot point, such that rotation of the spindle moves the pivotable linkage in a pivoting motion about the second pivot point. Rotation of the spindle additionally pivotally moves the spindle about the first pivot point. The inventive valve operator has a fewer number of parts, a relatively low cost of manufacture, and a high operating efficiency relative to known valve operators.

Abstract: A Valve actuator with integral amplifying means having multiple linkage arrangements able to amplify the force generated by an air signal acting on a flexible diaphragm, and to transmit this force amplified on to a lower compression spring and ultimately on to a sliding actuator stem.

Abstract: An improved control valve in combination with a pressurized water closet having a housing, a spool rotatable within the housing, a valve stem threading engaging the spool but fixed from rotating relative to the housing and a needle valve extending from the valve stem and into the housing orifice, creating a self cleaning valve adjustable by rotating the spool, which adjusts the depth of the needle valve in the orifice, and thus adjusting the effective opening of the orifice.

Abstract: A rotary barrel gate valve includes a body and at least one passage through the body defining an inlet and an outlet. There is a first actuator for rotating the body, a second actuator for translating the body, and a sealing portion on the body which seals the body with respect to an opening into a chamber adjacent the body.

Abstract: The present invention relates to a valve for controlling fluids, which has a piezoelectric actuator (2), a mechanical booster (3) for boosting the stroke of the piezoelectric actuator (2), a restoring element (4), and an actuating piston (6). The mechanical booster (3) is disposed in the actuating direction of the piezoelectric actuator between the piezoelectric actuator (2) and the restoring element (4). Thus the mechanical booster (3) boosts the stroke of the piezoelectric actuator (2) in the actuating direction, and in the opposite direction boosts the restoring force of the restoring element (4).

Abstract: The present invention relates to a valve for controlling fluids, which has an actuator (2) and a mechanical booster (3) for boosting a stroke of the actuator (2). A restoring spring (4) and a valve element (6) are also provided. The booster (3) is embodied as a kidney-shaped tilt lever (13, 14, 23), which has point-type bearing points.

Abstract: A device for transferring a thrust, a fuel injection valve with such a device, and a method for manufacturing such a thrust transferring device. To transfer the thrust of an actuator, especially in an injection valve, mechanical tappets are used, which have substantially the shape of a cylinder whose defining surfaces are substantially triangular, with the corners rounded. By the great width of the tappet, broad contact areas are created so that friction during the transfer is reduced.

Abstract: A fluid management system is disclosed which includes an injection device, a medical device, and a valve. The medical device is in fluid communication with the injection device. The valve is operatively associated with the medical device, and the valve includes a mechanism for slidably opening the valve.

Abstract: A butterfly valve comprises a valve housing with a valve opening and a valve seat, this valve housing enclosing a vacuum area of the valve; a valve plate which is mounted at a valve rod guided through the valve housing and which is pressed against the valve seat in a closed position of the valve, tilted relative to the valve seat in a partially open position of the valve through tilting of the valve rod about a tilting axis, and tilted and rotated relative to the valve in a completely open position of the valve by subsequent rotation of the valve rod about its longitudinal axis; wherein the valve rod has portions extending on both sides of the tilting axis, the portion located on one side of the tilting axis acting centrally at the valve plate and the portion located on the other side of the tilting axis being connected, via a link guide which is located outside the vacuum area and which has a link with a part extending at an inclination to the longitudinal axis of the valve rod and a helical surface-shaped p

Abstract: The present invention discloses an expansion valve of an air conditioning system for an automobile which does not employ a conventional method that opens and shuts in response to a motion of a pin and ball and can control a flow of a refrigerant and control linearly a flow rate of a refrigerant flow into an evaporator by using holes of a fixed hole plate fixed to a valve body and holes of a rotatable cam which is rotated by a motion of a pin moved upward and downward in response to a pressure difference between an outlet of an evaporator of an expansion valve and an interior of a pressure proof barrel. In the expansion valve of the present invention, it is possible to prevent a huntting phenomenon a reverse flow of the refrigerant into the evaporator and a noise caused by a ball, which have been generated in a conventional expansion valve, from creating.

Abstract: A valve, for example a tapered plug valve, having two obturators each rotatable between open and closed positions. The angle between the rotational axes is at least about 90° and may be 180°. The handles used to rotate the obturators are preferably on the same side of the valve.

Abstract: A compensating element is disposed between a piezoelectric actuator and one or more transmission elements. The compensating element has a curved surface that bears against the piezoelectric actuator. The compensating element compensates for both a tilting of the piezoelectric actuator and, if two transmission elements are provided, for a difference in an overall height of the transmission elements.

Abstract: A butterfly valve includes a valve housing having a fluid conduit, a seal plate assembly including a seal plate, and a closure assembly. The closure assembly includes a main shaft mounted in the valve housing and rotatable about a longitudinal axis between an open position and an intermediate position, a crank shaft rotatable about the longitudinal axis between the open position and a closed position, a hub affixed to the main shaft and movably coupled to the seal plate assembly to permit translation of the seal plate assembly with respect to the hub, a roller engaging the seal plate assembly and mounted to the crank shaft for eccentric rotation about the longitudinal axis, and one or more springs coupled between the seal plate assembly and the hub for biasing the seal plate toward the intermediate position. The valve may include a valve actuator which rotates the crank shaft about the longitudinal axis between the open position and the closed position.

Abstract: A low friction fluid motor has a diaphragm mounted in a shell to divide the shell into first and second chambers, a port means for connecting the second chamber to a pressure or vacuum source, and an actuator assembly. The actuator assembly is connected to the diaphragm and includes an actuator member extending out of the shell through an aperture. The actuator is free of any seal member which is interposed between the actuator member and the shell and which functions to form a seal between the actuator member and the aperture in the shell. The aperture is oversized relative to the actuator member to allow free passage of the actuator member from the actuator assembly through the first chamber and out of the fluid motor.

Abstract: A method and apparatus for remotely opening a manual valve of a gas cylinder from a remote location. The gas cylinder is first connected to a purge system which is purged of oxygen and pressurized with an inert gas to a pressure near that of the gas cylinder. The manual valve is then engaged with a pneumatic stepper mechanism. Pneumatic fluid is supplied to the pneumatic stepper mechanism to rotate the manual valve a predetermined stepped increment. The step of supplying pneumatic fluid to the pneumatic stepper mechanism is repeated, after pausing to let the system settle, to rotate the manual valve another stepped increment. The steps of rotating and pausing are repeated until the manual valve is opened. The purge system is then vented to atmosphere through a diffuser. Both the pneumatic stepper mechanism and the purge system are fully operable from the remote location. The pneumatic stepper mechanism includes a ratchet assembly and an attachment assembly connecting the ratchet assembly to the manual valve.

Abstract: A rotary valve actuator with movable actuator linkage maintained in a constant "pull-pull" tension, includes a sliding canister, rotatable lever, and a return spring substantially aligned in-line with each other. The linear motion of the canister in response to an expanding and contracting pressurized bladder is converted through chain linkage into rotary lever motion. The return spring is connected through respective chain linkage to the lever so the pulling tension of the spring/lever linkage rotates the lever and maintains tension on both chain linkages. Adjustable travel stops are provided. In an alternate embodiment the return spring chain linkage is configured at right angles to the linear movement of the canister. A double acting rotary valve actuator with pressurized bladders on opposite sides of a rotatable lever. One bladder is oval shaped.