Abstract: A control valve assembly to be assembled with a discharge nozzle of a sandblasting abrasive cleaning system or the like, comprising a valve housing to be connected at an inlet end to a supply conduit having a lower valve chamber and a well formation providing a lateral compartment communicating with the valve chamber, a circular valve seat at the discharge end of the valve chamber providing a beveled seating surface, and a pivot valve member supported for movement into and from the valve chamber having a generally cylindrical valve head and beveled surface to conform to and seat tightly against the seating surface and having an elongated stem portion extending in inclined relation from the valve head.

Abstract: A gate valve for sealing an opening in the wall of a vacuum processing chamber is disclosed. The valve includes a gate having a pair of wheels mounted on opposite ends of the gate and a curved track aligned and shaped to guide the wheels through an angle so that the plane of the gate is rotated out of the path of substrates as the gate moves between its sealing and open positions. The curvature of the track should be sufficient to rotate the gate through an angle of at least 60.degree., and preferably 75.degree. to 105.degree., in order to minimize the dimension of the chamber normal to the direction of substrate travel.

Abstract: A turbo-supercharger for an engine including a turbine casing of which scroll is formed with two exhaust gas inlet passages. The turbine casing has an inlet end surface connected with the outlet end surface of an engine exhaust pipe. The inlet passages are opened to the inlet end surface of the turbine casing respectively through inlet ports which are arranged in side-by-side relationship. A valve mechanism is provided to close one of the inlet ports under a low speed engine operation. The valve mechanism has a valve member adapted to seat on the inlet end surface and a swingable arm mounted on the exhaust pipe for moving the valve member. The exhaust pipe is formed with a sidewardly bulged portion where the swingable arm is supported. The swingable arm and the valve member are substantially received in the bulged portion in the open position.

Abstract: Low frequency noise and turbulence are reduced in a damper structure by providing a perforate screen extension onto the damper blade so as to extend across the flow path when the damper is open. Additionally, a perforate screen is located immediately downstream of the damper and spaced from the wall so as to define a chamber therewith as well as defining a boundary of the flow path.

Abstract: A diverter valve has a "Y" shape with a single inlet and two branch passageways formed at a confluence region of the "Y". A double sealing member paddle is pivoted on a shaft and located at the confluence of the two branches. The branches each have a replacement tapered seal seat. Rotation of the shaft in one direction forces one sealing member of the paddle onto one seat for full 360.degree. contact with the seat. Rotation of the shaft in the other direction forces the other sealing member of the paddle onto the other seat. A continuous peripheral seal contact is made with the seat. The seals and seats are concentric with the branch passageways and easily machineable and replaceable. The arrangement provides for smooth flow through the valve.

Abstract: A rotary air valve mounted in a case for rotatable movement about an axis to close either one of two adjacent openings has a flexible elastomeric seal that flexibly engages inwardly and outwardly facing curved sealing surfaces on the case to seal the respective openings when the valve closes same. The sealing surfaces have a radius of curvature whose axis is offset from that of the valve so that a predetermined contact pressure is established along the seal at the curved sealing surfaces to tightly seal the openings when the valve is closed but diminishes to zero immediately as the valve is rotated to open either opening to thereafter permit further opening of the valve uninhibited by the seal.

Abstract: A valve for controlling the flow of particulate material through a conduit which may be referred to as a clam shell valve including and arcuate valve plate. The valve includes a seal block having a recess for receiving the leading edge of the valve plate to assure a seal between the conduit and the valve element. The seal block is shaped to inhibit the entrance of material into the seal block and allow for the easy discharge of that material on opening of the valve element. The valve also includes an upper wiper seal element for cleaning the surface of the valve.

Abstract: A shut-off valve to fit the outlet end of a double faucet single spout tap in lieu of the conventional aerator screen. The valve comprises a valve body having an upstream valve seat on which is adapted to rest a disc-shape valve plug. An operant shaft extends transversely through the valve body and is provided with a handle at one end to rotate the shaft. The shaft has a central cam lapping a downstream edge portion of the valve plug. In one rotated position of the shaft, the valve plug closes the valve under the action of the upstream fluid pressure. Rotation of the shaft causes tipping of the valve plug to a fully-open position.

Abstract: A rotary valve for fluid flow control is provided having curved sealing surfaces, at least one of which has a cross-sectional arc segment forming a portion of an involute, for a valve closure member and a fluid port valve seat or seating surface. By machining the sealing surfaces of the valve closure member and of the valve seat to the form of an involute, these surfaces will engage substantially simultaneously over the entire perimeter of the valve seat at initial closing contact and closed or sealed positions. After initial contact and during overclosure, if elastomeric surfaces are used, the compression and sealing of resilient seating material will be uniform over the entire engaging surface, and around the periphery of the valve seat.

Abstract: An air inlet valve subassembly for use on a particle fuel burning furnace includes a manifold tube and a hollow spout mounted to an outer end of the manifold tube. The spout has an outer rim defining a valve opening and the manifold tube is adapted to be mounted at its inner end to the furnace to provide a passageway for communicating air from the valve opening into the furnace. A valve flap is mounted adjacent to the spout for pivotal movement toward and away from the spout between closed and open positions in which the manifold tube passageway is closed and opened to the communication of air. For sealing the valve opening, a generally planar, resiliently flexible disk with an annular ring of gasket material adhered thereon is provided. The disk, preferably made of stainless steel material, is removably mounted to the valve flap at the respective centers thereof with its outer side facing toward the flap and its inner side facing toward the spout rim.

Abstract: An air damper having a housing, a strut mounted across the housing, a pair of damper panels hinged on the strut, and swingable between open and closed positions, an adjustable control above the strut, and, linkage on the upper side of each panel extending to the control to cause the panels to swing from one position to the other.

Abstract: A flexible and resilient normally planar flap valve having two portions which together form a generally elongated oval shape. One portion of the flap has a greater radius than the other portion to restrict movement of the flap when installed in a tubular member. When installed the valve forms a generally arcuate shaped flap having a outer surface configured to conform to the cross-sectional shape of the tubular member. The flap has two operative positions; a first position in which the valve allows air to flow unrestricted through the tube; and a second position in which the valve seals off the main air source and directs air between a side opening and the tubular member. The flap is provided with a handle molded directly to one end of the flap, thereby creating a single piece integrated lever and live spring valve.

Abstract: A fluid damper blade made by bending a sheet of metal into a U and bringing the edges of the U together to form the trailing edge of the blade, the two edges of the U being of castellated form so that they interlock when brought together, with the castellations being bent over so as to embrace a reinforcing locking rod extending the full length of the blade trailing edge. This gives the blade enhanced rigidity and increased resistance to bending and twisting stresses. In addition, welding of the edges of the U is made unnecessary.

Abstract: A seal for coupling or valve assemblies employing flapper valves or the like has two axially and radially offset annular sealing members that are integrally joined by a relatively thin folding web section that provides the necessary flexibility to the seal. The radially outer sealing member is adapted to be clamped by a valve plate to the coupling or valve assembly housing to provide a first static seal surrounding the flow passage in the housing, whereas the radially inner sealing member essentially floats at the axial inner end of the web. The radially inner sealing member is adapted to be engaged by the flapper valve when moved to the closed position to provide a second static seal at the flapper valve face preventing flow through the coupling or valve assembly in either direction.

Abstract: In a miniature valve, a valve seat is formed by aperturing a plate. A cantilever leaf spring is disposed overlying the apertured plate for controlling the flow of fluid therethrough. An electrostatic potential applied between the cantilever leaf spring and the valve plate pulls the leaf spring over the apertured plate for variably controlling flow through the valve in accordance with the magnitude of the applied potential. In a preferred embodiment, the cantilever leaf springs are made in batch form by etching a silicon wafer. A flow controller is provided by measuring the electrical capacitance of the valve, comparing it with a reference voltage and deriving a feedback voltage applied to the valve for controlling flow therethrough. In one embodiment, the width of the cantilever leaf spring valve member is narrowed toward its free end for finer control of flow.

Abstract: A valve assembly for powdery granules comprises a valve housing having upper and lower walls formed with upper and lower openings, a valve member having a hollow cylindrical valve body rotatably supported within the valve housing, and a drive mechanism for turning the valve member through an angular range of about 90.degree. so as to hold the valve member upright in the vertical direction. The valve housing has, at the peripheral edge of its upper opening, a tapered surface which is enlarged downwards, and a circular groove is formed behind the tapered surface. Arranged in the circular groove is an elastic hollow seal ring, part of which is permitted to protrude into the interior of the valve housing through a circular slit formed in the tapered surface.

Abstract: An automatic temperature responsive damper assembly for use within the conduit of a ventilating system designed to exhaust the air from a confined space to the atmosphere when the confined space reaches a preselected temperature greater than that in the conduit adjacent to the atmosphere includes at least one vane pivotally mounted within the conduit and preferably two. The vane or vanes are mounted so that they are movable between a generally opened position, wherein air can pass freely through the conduit, and a generally closed position, wherein air passage through the conduit is restricted. A temperature responsive drive assembly that detects the temperature of the air within the conduit is mounted therein and opens and closes the vanes. Biasing the vanes to a normally closed condition is accomplished by placing a greater portion of each vane beyond its pivotal axis and having the smaller portion of one vane cooperate with the larger portion of the other to maintain the generally closed position.

Abstract: A flap for a ventilator, heater, or air conditioner installation in particular for the cabin of a motor vehicle, comprises a support plate (12) and at least one block-shaped air-guiding blade (20) mounted on said plate. Said block-shaped blade is constituted by at least two thin walls (22, 24) of plastics material which are made on and fixed to said support plate by molding. At least one of said walls is folded back and fixed to the other wall to obtain a a block-shaped blade having a volume which is greater than the sum of the volumes of said thin walls. This avoids the need to add on a plastic or foam block separately.

Abstract: A directional dump valve is disclosed which allows for the rapid dumping of water from a standard tank truck or similar vehicle. The device has three main dumping ports, which are quickly selected by adjusting the position of the water control doors. This adjustment can be made quickly with the handles provided on the device. A quick action locking device is disclosed which will lock the handles into position once the proper port has been selected. Two of the outlets are fitted with conduits to channel water from the rear of the vehicle laterally past the ends of the truck. Baffles are provided on the control doors to reduce turbulence in the valve, and to help quicken the flow through the side discharge conduits. The conduits can also be extended by the use of extensions, which can be folded up on top of the conduits when they are not needed. The valve is designed to be flange mounted to the tank truck and can be disassembled for quick repair.

Abstract: The gate comprises a damper /1/ overlapping the cross-section of a pipe-line /2/ and kinematically connected with a movable link /3/ of a drive /4/ turning it about an axle /5/ disposed on the pipe-line /2/, and a driven pin trip /12/ entering a hole made in the pipe-line and meant to hold the damper /1/ in the closed position. Secured on the damper /1/ is a bracket /8/, and in the kinematic chain connecting the damper /1/ with the drive /4/ there is an angular lever /9/ which is mounted so that it can turn through a limited angle and whose axle /10/ of turning is secured on the bracket /8/ parallelly to the axle /5/ of turning of the damper /1/. One arm of the angular lever /9/ is connected to the movable link /3/ of the drive /4/, and the damper /1/ has guides /13/ made thereon and accommodating a pin trip /12/ which is kinematically connected with the other arm of the angular lever /9/.

Abstract: A pressure regulator valve having a housing defining an inner chamber with at least one inlet port and one outlet port disposed in communication with the chamber is provided with a solenoid operated valve arrangement within the chamber for alternately moving two valve elements into and out of engagement with the inlet and outlet ports. The valve elements are mounted on a common elastic support member which is mounted for pivotal movement and each valve element is provided with a sealing surface which is inclined relative to the elastic support plate so that when a valve element is brought into engagement with the valve seat of a respective port, the sealing surface of the valve element will be disposed in flush parallel engagement with the valve seat.

Abstract: The invention is concerned with a blocking valve for liquids, which valve comprises a body (1), which forms a cylindrical valve housing (2) that is provided with flow openings (3), and a spindle (4) turnably mounted in the valve housing, the said spindle being turnable between a blocking position covering the flow opening in the valve housing and an open position liberating the flow opening, and the said spindle comprising a stationary body part (5) and a blocking part (6).

Abstract: A hand-operated dispensing nozzle control valve particularly suited for metered delivery of fuel. The control valve includes a poppet and actuator to initially tilt the poppet on its seat. The actuator arrangement greatly improves controllability as measured by a substantial decrease in required operating force and a reduction in the minimum quantity of liquid which can be dispensed.

Abstract: A fluid valve capable of operation in high pressure, bidirectional flowpaths includes a chamber having a circular port in which an axially and radially movable seat ring is engaged by an eccentrically movable valve plug having a spherically convex sealing surface. The plug is mounted to a valve shaft supported in the body for rotation about an axis transverse to, but offset from, the centerline of the port. The seat ring, body and a retainer ring include among them a pair of annular channels for retaining a pair of seals adapted for improving their sealing action with pressure.

Abstract: An exhaust air valve for placement in a ventilation conduit through which air is exhausted from a space to be ventilated. The valve has a casing with a concave seat surface facing upstream of the flow through the conduit and having a central valve orifice. A convex valve element cooperates with the seat surface and when the valve is closed engages the seat surface along a line of contact surrounding the seat. The curvature of the respective surfaces is the same, at least along the line of contact to ensure a tight closure of the orifice by the valve body. When opening, the valve body slides along the curved surface and the upstream surface of the valve body exposed to the flow is also convex to guide the flow toward the center of the orifice. Several embodiments are illustrated including valves with cords for remotely controlling the valve and heat-sensitive tripping mechanisms which automatically close the valve in the event of a rise in temperature above a preset level.

Abstract: A check valve having a removable seat portion with integral flapper (valving means) is disclosed. The seat portion can be removed through a port in the valve body without breaking any connection of the valve body to the associated fluid flow lines. The seat portion can comprise two sections that secure between them sealing means (e.g., an O-ring) for creating a fluid tight seal when the valving member of the check valve is closed against the seat portion. A fluid tight seal is created between the valve seat portion and valve body by tapers on the valve seat that cam against corresponding recesses of the valve body to force the valve seat portion against the valve body.

Abstract: A dust trap is disclosed including a pair of coaxially mounted dust valves. Each valve has a valve body with a flow path therethrough. A cylindrical seat is mounted in each body and a frustro conical flapper is provided having an angled surface which seats against a beveled internal surface of the seat. The flapper is mounted on an actuator shaft and rotates from a seated position to an open position substantially parallel to the flow path. A deflector is mounted in the seat and a wear plate is provided along an internal wall of the body opposite the actuator shaft so that dust passing through the valve does not impinge on the open flapper. An access door is also provided to inspect, clear or replace the flapper and seat.

Abstract: A sealing device for valves comprises two co-acting sealing surfaces one of which is arranged facing outwards on a valve body which is pivotally mounted in the valve housing, and the other forming an inwards-facing surface on the seat arranged in the valve housing. When the valve is closed the two sealing surfaces are pressed against each other with a wedge-wise engagement along an engagement line or engagement zone. According to the invention at least one of the sealing surfaces is formed as a segment (S) of a toroidal figure (T) which is defined by a convex or concave curved line (G) which is rotated as a generatrix around an axis of rotation (R), out of which figure the segment is cut so that a plane (A) through the sealing surface, along which the engagement line or engagement zone is located when the valve is closed, is inclined relative to the axis of rotation (R) and is bounded in each and every direction from the latter by the curved line.

Abstract: A dust trap having an annular valve seat and a pivoted valve flap closing the same including an off-center connection between the actuating means for said pivoted flap and said flap thereby to lessen the force required to open the valve passageway against the force of vacuum.

Abstract: A straight-through electrical activated valve is disclosed having a flapper closure element responsive to differential pressures of a valve cavity and fluid pressure upon the opposing sides of the diaphragm. A pilot valve (or electric solenoid) is provided to drain the valve cavity. The flapper closure element seats against the body of the valve in such a manner that the valve operates as a reverse check valve. If a straight line is extended from the valve seat plane of the valve body the resulting angle with the perpendicular axes would be obtuse.

Abstract: A shut-off valve for high temperature erosive flow is disclosed having a valve and a valve engaging or seating portion in which substantial erosion of an area beginning at its initial erosion point adjacent the valve seat does not erode the valve seating portion of the valve seat and the valve seating portion of the valve member to prevent closing of the valve or to cause leaks. The valve has limited but enough universal movement to be self-seating to accommodate thermal growth. The valve and valve seat can be removed from the valve without taking the valve off the line. A number of embodiments are disclosed.

Abstract: A fluid check valve having a cylindrical tubular body member which is symmetrical and is adapted to receive a pair of opposed head members which have suitable coupling ends formed thereon. The head members may be threaded on to the body or secured to the body with pins that prevent transmission of uncoupling torque to head retaining nuts engaged with the body. A valve closure disc is mounted on a removable support ring retained in a counterbore formed in the valve body by one of the head members. A valve seat surface may be integrally formed on a transverse face of one or both of the head members or may be provided as a separate seat insert threadedly mounted on the head members. The head members may be interchanged to accommodate particular coupling arrangements. The seat surface on the downstream head member is protected by a removable wear ring, or a removable wear ring insert is mounted in the head member in place of the seat insert.

Abstract: A damper or door plate construction and mount which is adapted to in situ assembly including a core plate of sheet plastic, a thin covering of porous foam material on each side, and a mounting shaft on a pivoting axis for the damper. The mounting shaft is secured at each end within the confines of the plate by tabs cut from the core plate and formed to provide a retaining recess for the shaft. The shaft has a loop between the ends forming a bight on the plane of the damper plate. A retaining member has a head and shank which fits the bight of the shaft and locks it against movement longitudinally, laterally, or away from the plate. The retaining member is held to the plate by a snap-in projection. A method of forming multiple plates from a large composite sheet is described.

Abstract: A control valve assembly to be assembled with a discharge nozzle of a sandblasting abrasive cleaning system or the like, comprising a valve housing having an elongated valve chamber to be connected at an inlet end to a supply conduit, a bulge formation on said housing providing a side compartment laterally communicating with the valve chamber, a circular valve seat at the discharge end of the valve chamber providing a beveled seating surface, a pivot valve member supported for movement into and from the valve chamber having a generally cylindrical valve head and beveled surface to conform to and seat tightly against the seating surface and having an elongated stem portion extending in inclined relation from the valve head, a handle controlled operating shaft journaled in the bulge formation having a linkage yoke member thereon connected to the valve member to tilt it while concurrently moving it arcuately about the shaft upon handle and shaft rotation to retract the valve member substantially fully into the s

Abstract: The disclosure relates to an improved flapper type saftey valve and valve housing for use in subterranean wells wherein the flapper valve is actuated from a horizontal closed position to a vertical open position by contact with a downwardly moving actuating sleeve. The top surface of the valve is elevated so that the bottom edge of the actuating sleeve always contacts the flapper valve at a position spaced from the axis of the pivot mounting, thereby assuring that the opening force applied to the flapper valve has a maximum moment arm in order to overcome any fluid pressure differential existing across the flapper valve. The valve is mounted in an eccentic bore on an eccentric mounting base and fully opened flapper valve provides maximum flow area through the valve.

Abstract: The gate and swing valve has a body which defines at least one valve seat. A closure member inside the valve is pivotably mounted on a support. A cam and cam follower operatively couple the cam to the closure member. A stem has one end coupled to the cam for moving the closure member in a linear motion, in a swinging motion, and then in a linear motion toward the valve seat.

Abstract: An automatic air regulating device for use in a forced air heating or cooling system whereby air vents or ducts leading to various rooms within a building may be automatically opened or closed to conserve energy. The automatic air regulating device of the present invention utilizes airfoil shaped dampers rotatable between open and closed positions within the building's air ducts. This airfoil shape thus provides for efficient and inexpensive operation of the dampers by utilizing the forced air flowing through the system for its operating forces. The dampers are further controlled by operation of restraining means which establish opening and closing conditions of the dampers in response to programmed or timed parameters set according to desired occupancy or use patterns within the building.

Abstract: An actuator for use with an aerosol container including a depressor bar having opposite hooks at the ends thereof embracing oppositely projecting annular walls of the container. The upper hook includes a retainer at the distal end of a spring finger portion thereof configured to retain the depressor bar in spaced relationship to the container while permitting inward urging of the depressor bar to urge the distal end of the retainer against the spray nozzle for actuation thereof.

Abstract: A springless nipple waterer valve includes a valve body in which a valve member is positioned with a valve head in bearing engagement with the apex portion of an abutment member at one end of the valve body. A valve seat is located in the valve body and the valve member has a valve head. A resilient sealing member is positioned between the valve head and the valve seat so that the bearing engagement of the abutment member with the valve member normally prevents fluid flow through the valve. However, the valve member is actuable by an animal pressing thereon to pivot the valve head about the apex portion of the abutment member, thereby permitting fluid flow through the valve. To vary the amount of flow through the valve, the valve member is adjustable to provide high or low rates of flow.

Abstract: A flow control valve assembly for closing an inlet into a housing through which powdery or granular material is flowing and for sealing said inlet once closed, the assembly comprising a closure member movable within the housing from an inoperative position in which the inlet is open into a normal operative position closing said inlet, during which movement a deformable sealing ring mounted in the housing to surround the inlet wipes over, to clean, the closing surface of the closure member and to make initial sealing contact with the closure member. Inflation of the sealing ring against the closure member in its normal operative position then supplements the seal while, on subsequent pressurization of the interior of the housing, the closure member is displaced bodily within the housing axially towards the inlet to make increased contact with, to supplement further the seal with, the sealing ring.

Abstract: A valve for opening and closing a fluid conduit of the type having a generally wide cross-section, the conduit having a transverse slit therein to allow for movement of a shut-off member into and out of registration therewith. The shut-off member has a spherical shape and cooperates with an apertured member which defines a surface of the same sphere. Both the shut-off member and the apertured member may be arcuately displaced, about a common axis, to establish either a closed or opened conduit with leakage from the conduit in either the opened or closed position being prevented by peripheral portions of the shut-off member and apertured member.

Abstract: A valve which has a gate of springy sheet material pressing at its peripheral region against an endless valve seat when the valve is in a closed position. The endless valve seat has a seating surface situated in a predetermined plane generally perpendicular to the direction of fluid flow through an opening defined by the endless valve seat. The gate of springy sheet material is of a dished configuration and has a hollow interior directed toward the opening defined by the endless valve seat when the valve is in a closed position. The dished springy sheet material which forms the movable gate of the valve has a central region situated upstream of the plane in which the seating surface is located, when the valve is closed, and a springy endless peripheral region situated in the plane of the seating surface in engagement with the latter when the valve is closed.

Abstract: A valve which may be interposed in a pipeline system in such a manner for injecting or launching of spheres into the interior of the pipeline individually and in sequence, and which may be alternatively interposed in the system for receiving previously injected spheres from the interior of the pipeline. The valve comprises a launch mechanism actuated by gravity and which has a single moving part, and in the receiving operation a blocking bar is provided for precluding incoming spheres from inadvertently or accidentally lodging within the valve body.

Abstract: A shut-off valve for high temperature erosive flow is disclosed having a valve and a valve engaging or seating portion in which substantial erosion of an area beginning at its initial erosion point adjacent the valve seat does not erode the valve seating portion of the valve seat and the valve seating portion of the valve member to prevent closing of the valve or to cause leaks. The valve has limited but enough universal movement to be self-seating to accommodate thermal growth. The valve and valve seat can be removed from the valve without taking the valve off the line. A number of embodiments are disclosed.

Abstract: An actuator mechanism for lift-turn type valves such as tapered plug valves and cam energized plug and slip assemblies includes an actuator housing structure that is adapted to be connected to a valve body. An actuator element that is adapted for interconnection with the operating stem of a valve element includes a cam energized mechanism which is capable of imparting both linear and rotary movement to the valve stem for sequentially unseating the valve element, rotating it 90.degree. to a selected position and moving it linearly in the opposite direction for reseating. During unseating and reseating linear movement, interengaging guide structure prevents undesired rotation of the actuator element and valve stem. An adjustment mechanism is provided to ensure optimum positioning of the actuator element relative to the valve stem. Energy transfer means is provided to ensure adequate transmission of forces during seating and unseating movement.

Abstract: Apparatus for regulating air flow through a housing is disclosed. A damper assembly including a bowed leaf spring is provided such that the leaf spring contacts the edge of the damper to secure the damper in position. The combination arrangement is utilized to either regulate the flow of air being discharged from the unit or to divert air between multiple outlets in the housing.

Abstract: A swing check valve having a generally cylindrical body with a fluid passageway extending therethrough, an annular resilient seat molded in place within the passageway and oriented normal to the passageway axis and a clapper assembly pivotally mounted for rotation about an axis normal to the passageway axis. The clapper assembly includes an arm removably connected to a shaft extending through the body and a generally circular valve loosely mounted to the arm and adapted to engage the seal. The shaft is disposed for rotation within a bore extending completely through the body and a lever is removably attached to the external end of the shaft to permit manual operation of the valve. In order to prevent the valve from slamming shut in the event of a sudden flow reversal, it is spring biased toward a closed position with a spring attached to the lever.

Abstract: A rotary spherical plug valve having an annular valve seat, a closure member formed as a portion of sphere, support arms for supporting the closure member with one of the arms being connected to a driving shaft at a hub having a hole for admitting the shaft with a slightly larger diameter than the shaft and a force transmitting means in the form of a cylindrical connection member disposed between a semi-cylindrical groove in the shaft and a semi-cylindrical internal recess in the wall surrounding the hole in the hub.

Abstract: The two supports for the plug in an eccentric rotary valve are joined and rotatively coupled by a wing member. As the plug is rotated from its closed position on the cooperating seat by the rotation of a shaft fixed to one of the plug supports, the wing member lies in the fluid flowing through the valve. This fluid flow causes the wing member to exert a rotative force on the shaft in the direction to move the plug in its valve-opening direction. This force shifts the inherently unstable control region of a rotative force, which the fluid flow causes the plug to exert on the shaft, and thereby extends and widens the range of the plug positions in which an external rotative force applied to the shaft, as by a valve actuator, can uniquely determine, and exert exclusive control over, the shaft and plug positions.

Abstract: A butterfly valve for use in the control of gaseous fluids which comprises a valve disc having an annular sealing surface near its periphery, a flat annular valve seat provided in a housing accommodating the valve, and an actuating means for opening and closing the valve by bringing the valve disc sealing surface and the valve seat into cooperation, said valve seat containing an elastic sealing means which is adapted to be pressed against the sealing surface of the valve disc to enable a leakage-free closure of the valve.