Abstract: A valve fixing mechanism for fixing protruding walls of valve housings of adjacent gate valves to a chamber in a fixing space defined between the valve housings includes a support member fixed to the chamber in middle part of the fixing space and a pair of lever members arranged on both sides of the support member. The pair of lever members each include fulcrum part, load part, and effort part arranged in that order from the middle part of the fixing space to an opening at either end of the fixing space. The fulcrum part is supported by the support member, and a force is applied to the effort part by a fixing operation bolt, so that both the load part and the effort part press the protruding walls of the valve housings against the chamber.

Abstract: A deployable flood shield, and associated method, prevents ingress of water through an opening. An outer frame is positioned to surround the opening and has a top channel, a bottom channel, a left channel and a right channel. A flexible shield is stored within the bottom channel prior to deployment and has a left edge retained by the left channel and a right edge retained by the right channel. Seals are configured with each of the bottom, left, and right channels for sealing between the bottom, left, and right channels and the flexible shield when deployed. A controller deploys the flexible shield to prevent the ingress of water into the opening. A deploy command is received and a motor is driven, for a predefined period, to deploy a flexible shield to block the opening and preventing the flexible shield from retracting.

Abstract: An expanding dual disc gate valve that can be used in applications requiring double block and bleed type systems. A stem is positioned in the center of a valve body with a first and second gate arranged on opposite side of the stem with respect to each other. The first and second gates are slidingly engaged with the stem so that the stem controls their movement between an open and a closed position with respect to an inlet and an outlet of the valve body. As the gates approach the closed position they encounter a shoulder of the valve body preventing further downward movement, whereby further force from the stem wedges the first and second gates outward to create a sealing arrangement with a seat ring of the valve body.

Abstract: A gate valve includes: a valve box; a support body disposed inside a hollow portion; a valve plate including a fixed valving section, a movable valving section sliding in a direction in which a flow passage is extended, a first peripheral region; and a second peripheral region; a first biasing section disposed at the first peripheral region, allowing the movable valving section to move toward a first opening portion, allowing the movable valving section to come into contact with an inner surface, pressing the movable valving section onto the inner surface, and closing the flow passage; and a second biasing section disposed at the second peripheral region, allowing the movable valving section to move toward a second opening portion, and releasing the flow passage by separating the movable valving section from the inner surface.

Abstract: A vacuum valve, including a valve housing, which has a passage having an axis, a seat that surrounds the passage and that lies in a first plane, and a counter seat that surrounds the passage and that lies in a second plane that forms a wedge shape with the first plane, and including a closure device, which can be moved between an open position in which the passage is released and a closed position in which the passage is sealed and which has a closure plate parallel to the first plane and a counter plate parallel to the second plane, and including a valve rod, which has a longitudinal axis and which carries the closure device and which can be moved in a straight line.

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 sliding valve assembly includes a valve body having a fluid conducting port adjacent to a fluid impervious surface. The actuator allows fluid to travel through the valve assembly and into a fluid blocking position where the fluid impervious surface obstructs the fluid from traveling through the valve assembly. First and second sealing assemblies include a primary seal ring, a secondary seal ring around the primary seal ring, and a spring forcing the primary seal ring against a sealing surface. As pressure in the system increases, this pressure is delivered to the sealing assemblies to force them against the sealing surfaces to enhance the sealing relationship. Cams and cam followers affixed to the valve body overcome the frictional forces of the sealing system and the valve body and valve housing to increase the efficiency of the valve assembly and the system in which the valve assembly is used.

Abstract: A vacuum valve including a valve opening, a valve seat surrounding the valve opening, and a valve plate. During closing starting from the open position, the valve plate is moved over a main section of the closing path in a main closing direction parallel to the valve plate and the plane of the sealing surface, and then over a final section running at an angle to the sealing surface plane for guiding the valve plate onto the valve seat. A guide element on the wall that guides the valve plate over the end section of the closing path interacts with a guide element on the valve plate. The valve plate is guided over the final section of the closing path by guide surfaces that are angled relative to the sealing surface, and at least one guide surface is arranged on a guide element of the valve plate or the wall.

Abstract: A non-ported expanding gate valve and method of use, including an expanding gate assembly and a slotted guide, is fixedly positioned on the valve body and slidably coupled with a gate assembly. The guide has slots of varying widths that are used with a pivoting rocker arm coupled with the gate assembly to adjust the thickness of the gate assembly at the proper timing. The guides perform multiple functions, including: centralizing a rocker arm during opening between seats; collapsing the gate assembly when opening; allowing and controlling expansion when closing; guiding lateral movement during operation of the gate assembly between opposing guides on the sides of a flow passageway; guiding axial movement during operation of the gate assembly between opposing guide side flanges; retaining seats in position when the valve is open; and/or stiffening the guide in a lateral direction to control movement of the gate assembly.

Abstract: A slide valve, in particular for blocking a line conveying media, is provided with a multi-part housing (2) having a passage opening (3). Disposed in this housing (2) are two slider plates (4, 5), parallel to one another, moveable at right angles to the passage opening (3), and which can be moved from an open position into a closed position tightly blocking the passage opening (3) by means of a common drive mechanism (10). Means are provided for connecting the two slider plates (4, 5) to one another and to the drive mechanism (10), and which in the closed position allow a pre-determined relative movement of the slider plates (4, 5) in relation to one another in their direction of movement. Thus, even with tolerance deviations with regard to the slider plates and/or their counter-surfaces, a long-lasting blocking function of both slider plates is guaranteed.

Abstract: A sliding valve including a valve body (1) with a wall having a valve opening (3) and a valve seat (4) surrounding the valve opening (3), a valve plate (5), at least one valve rod (8) that can move in the axial direction and can be moved for closing the valve starting from a first position in which the valve plate (5) assumes its open position, to a second position in which the valve plate (5) assumes an intermediate position covering the valve opening (3) but lifted from the valve seat (4), into a third position in which the valve plate (5) assumes its closed position. At least one lifting element (10, 11) moves the valve plate (5) from its intermediate position into its closed position, and at least one support unit (12) with at least one front and at least one rear support element (14, 13) that interact in the closed position of the valve plate (5) with at least one valve-body-fixed, front support element and at least one valve-body-fixed, rear support element (16, 15).

Abstract: A pinch valve includes a valve body having a slot which is configured to allow a web of substrate material to pass therethrough. The valve body has a sealing surface which includes a first curved portion with a first radius of curvature. A dynamic seal element is configured to engage the valve body and includes a second curved portion having a second radius of curvature which is larger than the first radius of curvature. An actuator is operable to selectively bias the dynamic seal element into and out of engagement with the valve body so that when it is biased into engagement with the valve body the web of substrate material is engaged between the sealing surfaces of the dynamic seal element and the valve body. Also disclosed is a processing system which includes the pinch valve.

Abstract: An expanding gate valve having a valve body defining a valve chamber and flow passages and having spaced sealing surfaces. Gate members are moveable within the valve body between open and closed positions and at the closed position having sealing engagement with the spaced sealing surfaces. A wedge member is positioned between the gate members and has at least one tapered surface having reacting engagement with a tapered surface of one of the gate members so that relative linear movement of the gate member relative to the tapered surface of the wedge member develops a lateral gate expansion force causing expansion of the gate members for tight sealing engagement with the spaced sealing surfaces.

Abstract: A gate valve has a gate that moves in a gate cavity between a lower closed position and an upper open position. A seal member in the gate seals against a downstream seat ring when the gate is in the closed position. The seal member is moveable in upward and downward directions as well as upstream and downstream directions relative to the gate. The seal member is in an upper and downstream position relative to the gate while the gate is in the closed position. A cam member is carried by the gate for movement in unison and is in engagement with the seal member. The cam member moves the seal member to an upstream and downward position in response to initial movement of the gate from the closed position toward the open position.

Abstract: A movable member is fitted in the middle in the vertical direction of a valve body core fitting that forms a gate valve body, and the movable member presses an elastic seal member from the inside of the seal member toward a tube inner wall surface located in a direction crossing the direction of insertion of the seal member. The movable member has arms and contact sections. The arms each have a second inclined section for pressing the elastic seal member against the tube inner wall surface upon receiving pressing action from a first inclined section that is formed on a pressing member and changes the direction of pressing. The contact sections are in contact with and press the inside of the elastic seal member. The contact sections of the movable member have recesses having inside the elastic seal member.

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 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 device is provided. The valve device of the present invention includes a planetary component and two valve plates. The two valve plates are disposed on a hole portion of the planetary component opposite to each other, so as to provide a quick opening and closing with a relatively high opening and closing speed, and to reduce the space occupied. Therefore, the provided valve device does not need to perform adjustment (processing) to reduce the operating force on the sluice valve or to assure the closing function of the valve. Further, the function and the producibility of the valve are improved significantly.

Abstract: A valve mechanism having at least one movable valve member for sealing of a valve opening in a housing. Movements of the individual movable valve members are accomplished essentially parallelly to, and perpendicularly to, the seat surface of the valve during the opening and closing of the valve. In order to achieve high forces and low wear in the movement carried out with aid of a slot guide which guide serves to transmit forces during, and in the direction of, the opening and closing, the slot guide comprises slots which are formed in a drive plate, which slots cooperate with and overlap complementary slots in the movable valve members.

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: A pendulum gate valve incorporates an improved power transmission device for transmitting the movement of a pivot arm of the valve to a valve disk that selectively closes the valve. The power transmission device has a supporting plate and a valve disk support that is fixed to a tip end of the pivot arm and movable relative to the valve disk. First and second facing roller guide grooves, formed on the valve disk and on the valve disk support, respectively, extend obliquely downwardly so as to be separated from the valve disk. Third and fourth facing roller guide grooves, formed on the valve disk support and the supporting plate, respectively, extend obliquely downwardly so as to approach the valve disk. A first roller engages the first and second roller guide grooves, and a second roller engages the third and fourth roller guide grooves.

Abstract: A gate valve is disclosed comprising an elevatable lever member connected to a piston rod, a displacement member for making up and down movements integrally with the lever member and being tiltably disposed about supporting rollers acting as a pivot point or fulcrum at an end position of displacement, spring members interveningly disposed between the lever member and the displacement member, pin members fixed into side surfaces of the lever member, and engaging grooves formed in side surfaces of the displacement member and engaging with the pin members.

Abstract: A gate valve in which the structure is simplified and inexpensive, movement of a valve body is smooth and high in speed, a force of inclination moving the valve body is strong, and a sealing property of an opening portion can be improved. The gate valve has a valve body capable of sealing the opening portion; a valve rod to which the valve body is fixed; a roller rotatably provided on the other end portion of the valve rod; a roller receiving member having a first holding portion for holding the roller when the valve rod moves the roller straight, an inclined surface for inclining the valve rod, and a second holding portion for holding the roller when the valve rod is inclined up to a predetermined angle; a driving means for moving the roller receiving member straight; and stoppers limiting the straight movement of the valve rod at predetermined positions at which the valve body closes the opening portion. This gate valve is preferably driven by the cylinder apparatus.

Abstract: A gate valve assembly having a primary and secondary seating surface for preventing process fluids from contacting the seals of the valve is provided. Additionally, a purge gas inlet can be disposed in the valve body to prevent process gases from contacting the seals during operation. Still further, a primary and secondary barrier seal may be provided to prevent process gases from contacting the primary seal. Additionally, a purge gas inlet can be disposed between the primary and secondary seals to further prevent process gases from contacting the primary seal.

Abstract: A gate valve (110) includes a valve housing (112), valve plate (130), and linkage assembly (134, 136, 140). An actuator assembly (124) includes a cylinder component (150) and a piston component (170). Piston component (170) includes a piston rod (174) that has a downwardly extending annular collar (187) and cylinder component (150) includes an end wall (156) with an upstanding annular collar (160), which slidingly mates with collar (187). A bellows shield (192) is flexibly mounted between the piston rod and the cylinder end wall to isolate the valve chamber of housing (112) from the sliding interfit of the piston and cylinder components. Piston component (170) also includes an annular groove (198) for receiving the annular collar (160). Wear rings (191, 193) are provided between piston component (170) and cylinder component (150).

Abstract: A slot valve (10) comprising a valve housing (12) defining a valve chamber (14) and having a valve gate (34) movable to seal off a central opening (30). An actuator assembly (46) includes a piston component (70, 72) and a cylinder component (60), and a pair of inner telescoping actuators (108), which define inner working chambers (120). Wear rings (124, 126, 128) engage guide surfaces that are isolated from valve chamber (14) by means of a bellows shield (90). The guide surfaces are positioned at least partially along the length of the bellows shield (90), within the second working chamber (104) of the actuator, so as to decrease the height of the actuator.

Abstract: An expanding gate valve which includes a reciprocating gate supporting at least one floating segment supported on one side thereof with a wedging means between the gate and the segment for wedging movement of the segment transverse to the fluid flow path and further wedging the segment against a valve body seating surface upon reciprocating movement of the gate in selective response to valve stem movement so as to seal the fluid flow passageway from the valve body cavity selectively in a fluid flow closed position or in a fluid flow open position of the valve, wherein the floating segment comprises a first wedging surface configured to coact with the gate and a second wedging surface to coact with the valve seating surface.

Abstract: A non-sliding vacuum gate valve has a valve housing with a valve opening therethrough which is opened and closed by a gate valve body moved by a valve rod. The valve rod moves with linear and tilting movement so that the valve body tilts against the valve seat surrounding the valve opening. The valve rod is moved linearly by cylinder rods extending from a pair of cylinders attached to the valve housing on either side of the valve rod. A cam body having an angular cam slot is attached to a connecting member which spans between the end portions of the cylinder rods above the valve rod. The valve rod has a cam follower engaging the angular cam slot to provide the tilting movement of the valve rod and valve body responsive to the alternate reciprocal vertical movement of the cylinder rods, to open and close the valve opening.

Abstract: A gate valve wherein a valve disc is moved to a position where the valve disc is brought into contact with a valve seat and a position where the valve disc is separated from the valve seat by a driving device provided outside of a valve housing through a valve rod sealingly projected from the inside to the outside of the valve housing. The valve disc is brought into contact under pressure with the valve seat in the valve housing when the valve rod is inclined at the end of the movement of the valve rod. The driving device has piston cylinder devices, a block arranged in side-by-side relationship with the piston cylinder devices and connected to the valve rod, and a device to move up and down and to incline the block.

Abstract: A knife valve comprises a body defining a valve seat and a knife blade longitudinally movable by a cylindrical stem in the body for opening and closing a lateral flow passage defined therethrough. The body includes a bonnet with the stem extending therethrough and with circular packing rings being disposed therein around the stem. The valve seat is located on a first side of the blade and in operative proximity thereto. The stem includes a lower head portion which defines an angular surface, whereas a top portion of the blade defines a slot forming an angular surface parallel to the angular surface of the stem head. The stem head is engageable in the slot with the angular surfaces thereof being in sliding contact. Therefore, when the blade is in its closed position, a longitudinal force exerted by the stem on the blade is transferred into a lateral force oriented towards the seat, thereby forcing the blade against the seat in a tight bidirectional seal under a positive torque.

Abstract: A valve comprising a valve body (1) provided with two openings (2, 3) each fitted with a flange (4, 5) for connection to pipework, and a moving valve member (6) for closing one of the two openings (3), said opening including a valve seat (26) whose profile corresponds to that of the valve member, said valve member (6) including means (14, 8, 9, 24) for displacing it towards its seat, the valve being characterized by the fact that said valve member (6) or its seat (26) is made of a shape memory alloy treated in such a manner that the shape memory effect is reversible, said piece (6, 26) made of shape memory alloy including channels (27, 31) enabling it to be fed with fluids for changing its state, thereby causing the said piece (6, 26) made of shape memory alloy to expand or contract as appropriate.

Abstract: A valve operating mechanism produces a rotating force for causing a valve body of the valve to shift relative to a valve seat thereof, so that the valve is opened and closed. A piston of the mechanism produces a rectilinear reciprocating force. A screw member is supported moveably along the rectilinear line and unrotatably in the housing and includes a pair of pawls helically projecting along the rectilinear line and a helical interval space defined between the helical pawls. A pivot is inserted into the helical interval space. A cylindrical rotating member is supported rotatably and unmoveably along the rectilinear line in the housing so as to surround the screw member. When the screw member receives the rectilinear reciprocating force to perform the reciprocating motion along the rectilinear line, the pivot is urged to rotate along the helical interval space in the rectilinearly unmoved state, and the cylindrical rotating member can rotate with the pivot.

Abstract: A device for measuring the dimensions for locating multifocal segments on eyeglass lenses. A chinrest is provided for maintaining the stability of the patient's head while the proper location of the multifocal segment is determined, and an eyepiece is provided through which the dispenser may look at reference points on the face of the patient and the patient's new eyewear to measure the required dimensions. The eyepiece is then moved along the vertical axis of the post to which it is mounted, and the distance traveled by the eyepiece between the reference points is measured by a measuring device found on the apparatus.

Abstract: Valve mechanism for high-vacuum clean environments, wherein a slot aperture is closed by a gage having a lever. Motion of the gate which covers and uncovers the slot is imparted to the gate by longitudinal movement of the lever. Motion of the gate which seals and unseals the slot is imparted by pivoting movement of the level about a fulcrum near the center of the lever. The pivoting movement is imparted at a time different from that at which the longitudinal movement is imparted, and the pivoting movement may be imparted by means separate from that which imparts the longitudinal movement.

Abstract: A valve for a vacuum enclosure, the valve comprising a valve body (1) which is hollow about an axis .DELTA. and which opens out to the outside via two opposite end openings (24, 25) of the valve body, thereby enabling the valve to be inserted in a pumping circuit, the inside of said valve body being provided by closure means constituted by a strip (7) which is movable in its own plane, which plane extends perpendicularly to the axis .DELTA. said strip being provided with at least one opening (8) and being associated with two pay-out and take-up drums (9, 10) provided with drive means, said valve body being further provided with sealing means situated between the two drums and comprising a fixed gasket (15) fixed to the valve body and situated on a first side of the strip and a moving gasket system capable of moving parallel to the axis .DELTA.

Abstract: A gate valve has a housing provided with a passage embraced by a valve seat for a fluid medium, carrying solid particles, to flow therethrough. A gate is provided which is connected to a rod of a drive through a beam member. A hole in the beam member receives a shank with a clearance extending axially of the rod. Ends of the beam are pliable in an axial direction relative the passage and the beam ends have bevels to engage with stops of the housing. The housing has a projection to limit the travel of the gate axially of the rod.

Abstract: A vacuum gate valve includes a spreading mechanism with an actuating member extending between first and second valve plates and movable transversely of the axis of the valve, and parallelepiped spreading members disposed between the first valve plate and the actuating member and between the second valve plate and the actuating member. In the open position of the valve, the spreading members include an acute angle with the direction in which the actuating member is moved for closing the valve. When the actuating member is moved in order to spread apart the valve plates and to close the valve, the spreading members pivot about intersecting lines of contact surfaces formed in the valve plates and in the actuating member. In the closed position of the valve, the spreading members extend perpendicularly to the direction of the movement of the actuating member.

Abstract: The invention is a flow and pressure-sealing valve for use with abrasive solids. The valve embodies special features which provide for long, reliable operating lifetimes in solids-handling service. The valve includes upper and lower transversely slidable gates, contained in separate chambers. The upper gate provides a solids-flow control function, whereas the lower gate provides a pressure-sealing function. The lower gate is supported by means for (a) lifting that gate into sealing engagement with its seat when the gate is in its open and closed positions and (b) lowering the gate out of contact with its seat to permit abrasion-free transit of the gate between its open and closed positions. When closed, the upper gate isolates the lower gate from the solids. Because of this shielding action, the sealing surface of the lower gate is not exposed to solids during transit or when it is being lifted or lowered.

Abstract: A solenoid actuated fluid control valve comprises a porting member including a port and a conical valve seat circumscribing the port, and a relatively movable port closing valve element such as a needle valve element including a resilient conical tip. The valve seat and tip are correspondingly tapered and a small annular bead is provided on the resilient tip which provides for initial and preferably total sealing of the valve. Also provided is a suitable stop such as a shoulder on the needle valve element body adjacent the resilient conical tip thereon which engages an opposed surface on the porting member to prevent overcompression of the resilient conical tip and preferably to limit sealing contact to the area of the sealing bead.

Abstract: A valve structure permitting two vacuum chambers (16, 20) to be separted or joined without breaking the vacuum in either. The structure includes first and second valves (10, 12) positioned at openings in the vacuum chambers, a valve housing 30 surrounding the valves and able to be sealed to form a valve lock chamber (32), and a pair of valve actuators (34, 36). Each valve includes a pair of plates movable together to an intermediate position over the opening, and then movable away from each other in response to further actuator movement, to seal one of the plates over the opening. In one disclosed embodiment the plates are moved apart by a pair of parallel pivot links, and in another embodiment a pair of balls is used to effect the required sealing movement.

Abstract: Opening and closing of a fluid flow path is controlled by a valve closure member which consists of both a sealing plate and a counter element and which is moved within its own plane to open and close the valve assembly by a crank rod. Spreading elements are arranged between the sealing plate and the counter element tending to urge these members apart and the crank rod mechanism includes a slide member which is arranged to move within a guide slot in the sealing plate and to also engage a circumferential edge of the counter element so that during closing movement of the sealing plate by engagement of the slide member in the guide slot, the slide member may also extend to engage the circumferential edge of the counter element to rotate the counter element relative to the sealing plate in order to place the spreading elements in position to apply a sealing force between the sealing plate and counter element.

Abstract: A portable toilet having an improved valve arrangement for minimizing abrasion of the holding tank inlet seal. The valve arrangement includes a valve member which moves generally normal to a sealing plane defined by the seal when the valve is opened or closed. A wiper element is disposed adjacent the holding tank inlet and is positioned to exert a wiping action on the sealing surface of the valve member when the valve is operated.

Abstract: A gate valve is disclosed having a casing with inlet and outlet apertures one of which has a valve seat. An actuator reciprocal transversely of the apertures is provided having two oppositely disposed faces. At least one plate member which serves as a valve head flanks at least one of the faces for cooperation with said valve seat. And rectangular-shaped rotative means are positioned between the actuator member and the plate member for moving the plate member from an open to a closed/latched position as the actuator member is moved.

Abstract: A valve body includes flow passageways across which a gate is movable with the gate having a central block sandwiched between outer seal blocks and a gate conduit alignable with the flow passageways of the valve body. Camming means along the edges of opposite faces of the central gate block cooperate with camming means on the seal blocks so that relative vertical movement between the central gate block and the seal block causes the seal blocks to expand outwardly into sealing contact with seal means on the ends of the passageway facing the gate. A main stem moves the entire gate as a unit with a coaxial cam drive shaft in the main stem having first and second oppositely threaded sections respectively engaged with the main stem and the central gate block to rapidly effect vertical movement of the central gate block upon rotation of the cam drive shaft.

Abstract: A slide valve for high temperature, high pressure use provides for easy access to internal components for replacement or repair, and also provides for easy and secure adjustment of the valve components from the exterior of the valve even while the valve is in position in its process line. The slide valve includes a body having a throat providing for fluid passage through the body, a shoulder within the body including passage means communicating with the throat, a side portion extending transversely from the body and having an interior space communicating with the throat, a valve seat removably positionable upon the shoulder, a guide member removably positionable within the body adjacent the shoulder and extending into the side portion, a closure member positionable slidably upon the guide member for opening and closing the passage means, and a wedge member positionable adjustably between the shoulder and the guide member. The wedge member is adjustable exteriorly of the body.

Abstract: A gate valve comprising a valve body having oppositely disposed inlet and outlet ports, a valve closure member reciprocally disposed within the valve body and interposed between the inlet and outlet ports to provide alternate open and closed positions for the valve, a valve seat provided in the valve body and disposed on the upstream side of the closure member for sealing of the valve in the closed position thereof.

Abstract: An isolation and flow control valve in a furnace charging installation, installed in a discharge conduit of a storage hopper which may be alternately at ambient pressure for loading and furnace pressure for discharging, is characterized by a valve member which is caused to move serially in two directions during opening and closing. The movement is produced by an actuator mechanism including a pivot arm and a cam system and results in movement axially with respect to the conduit for seating and unseating and generally transverse to the conduit axis for controlling material flow through the conduit.

Abstract: A vacuum-tight closure assembly includes a valve seat; a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and a guide arrangement for a centered guiding of the valve plate during its motion into the closed position. The guide arrangement includes guide faces located in the vicinity of and stationarily with respect to the valve seat and counterguide faces located on and movable with the valve plate. The guide faces cooperate with the counterguide faces during the motion of the valve plate towards the closed position.

Abstract: A gate valve is provided for use in conjunction with vacuum equipment in which a gate assembly is opened and closed, for example, by a pneumatic cylinder. The gate assembly is enclosed in a valve housing, and aligned openings are provided in the opposite walls of the housing. The gate assembly is moved by the pneumatic cylinder between an open and closed position with respect to the openings. The gate assembly includes a gate which is mounted on a carriage, and the carriage is moved by the pneumatic cylinder between a first position in which the gate is open, and a second position in which the gate is closed. A feature of the gate valve of the invention is that when the gate is open, a smooth bore is provided through the valve aperture with electrical surface conductivity for short-circuiting stray radio frequency electric currents.

Abstract: A cam-lock water gate designed to control water flow from a pond, lake, field, canal or the like. A primary body member is provided with an aperture therethrough and a short section of pipe stub integral with the main body member and opening into said aperture. An adjustable gate plate is mounted on said main body member and constrained between parallel guide channels to permit the gate to be adjusted for completely opening the aperture, partially opening the aperture, or completely closing the aperture. A regular duty embodiment employs a simple handle and rod control for both adjusting the gate plate as well as locking the cam-lock mechanism to positively retain the gate plate in the set position once adjusted. Another heavy duty embodiment employs heavier materials and heavier construction of the device and also incorporates a security lock bar that enables the gate plate to be locked to prevent unauthorized adjustment thereof.