Abstract: An engine air intake shutoff apparatus includes a frame that can be attached to and supported by an engine air intake passage such as an engine blower housing over the engine air intake passage. A baffle plate having rollers extending above its surface slidably moves along the side panels of the frame. Rotatable, retractable baffle arms direct the movement of the baffle plate within the housing. The baffle plate has a mitered leading edge that mates with a wedge on the interior of the frame opposite the leading edge of the baffle plate. Baffle arms are secured to rotatable operating shafts at a point above the attachment point of the baffle plate to the baffle arm so that downward force is exerted on the end of the baffle plate. The combination of the mating of the leading edge of the baffle plate and the wedge and the downward and forward force exerted by the baffle arms create an airtight seal between the baffle plate and the frame when the baffle plate is in the closed position.

Abstract: A high-volume, high-pressure valve is provided for attachment to the water inlet of a firetruck to receive the downstream end of the main supply hose connected to the fire hydrant. The heavy construction necessary to withstand the high pressures and rapid flow rate of water includes a gate which slides over a dam plate, with both the gate and the dam having slotted apertures which alternatively align and misalign as the gate slides over the dam to alternately open and close the dam.

Abstract: A high-pressure, high-temperature gate valve which uses a flat faced gate seating on a flat and preferably interchangeable seat, the gate having a wedge-shape on the upstream side which assists in forcing the seating surfaces together which is highly desirable in high-pressure conditions. The inlet and outlet ports are completely covered in the closed position which enables the valve to withstand extreme pressures. The gate valve further includes a valve stem extending through said chamber and said body having a threaded lower end cooperating with a threaded recess in said gate, said stem being axially rotatable in a bearing means in said body to raise and lower said gate between said open and closed positions, said bearing means including a stuffing box, a lower seat and an upper seat through which said stem extends, said stem including an integral collar located between said seats. The upper seat is provided by the stuffing box.

Abstract: A gate valve is disclosed having a secondary seal, wherein the gate forms a metal to metal seal with the seat and wherein a resilient seal is moved toward the gate in a closed position to form a secondary fluid-tight seal with the gate. A device for deenergizing the secondary seal is provided in order to prevent wear of the secondary seal upon opening of the gate and also to reduce the gate drag caused by the energized secondary seal. Also disclosed is a pressure relief mechanism for the secondary seal adapted to prevent damage to the seal and a mechanism for evenly applying opposing secondary seals.

Abstract: A stop-check valve includes inside a valve body a swing check valve disc and a contacting projection. A vertically mounted valve rod provided with a handwheel and having at the lower end a structure of a cylindrical contact portion is further included. The contact portion is vertically movable in coupling arrangement with the valve rod and capable of contacting with the contacting projection on the valve disc.

Abstract: Disclosed is a gate valve for controlling flow, providing a dual seal, including a valve body having a discharge orifice. A gate assembly, located upstream of the discharge orifice, is movable between open and closed positions remote from and blocking the discharge orifice, respectively. The gate assembly includes upper and lower spaced flexible sealing disks which are attached to a relatively rigid upstream backup plate. Radially inner and outer valve seats are secured to the valve body adjacent the discharge orifice. When blocking flow through the valve body, each gate is wedged in sealing engagement with a respective valve seat and a chamber is formed between the two seals to receive seepage past the upstream seal. The chamber may be either evacuated or pressurized to prevent flow of controlled material past the lower or downstream seal.

Abstract: A two part high vacuum gate valve construction includes a control mechanism part having a limited displacement stem passing through a first generally rectangular high vacuum flange and a valve body part including a generally rectangular case, a second generally rectangular high vacuum joint providing flange having a mirror image sealing geometry to the first high vacuum flange, two machined fluid flow flanges passing through openings defined through opposite sidewalls of said case and sealed thereto, at least one of the fluid flow flanges having an inside gate sealing surface machined prior to insertion through and sealing of the flange to the sidewall of the case; a two part, levered carriage having a central transverse pivot joint and having an endwall engagement mechanims for causing the pivot joint to pivot toward the inside gate sealing surface of the one flow flange in response to continued actuation force supplied by the control stem shaft after an inside endwall of said case has been contacted; a valv

Abstract: A slide gate has a frame made up of parallel channel guides extending vertically from and cooperating with a horizontal bottom to define a gate opening. The channel guides each have mutually spaced first and second guide flanges protruding laterally into the gate opening. A gate disc is supported by the frame for vertical movement between a lowered position resting on the frame bottom and closing off the gate opening, and an open position spaced thereabove. The gate disc has side portions received between the first and second guide flanges of the channel guides, and these side portions carry seal assemblies. A plurality of vertically spaced pivotal pressure pads are mounted on each of the channel guides between their respective first and second guide flanges.

Abstract: A valve which can be applied to a water pipe while the pipe remains in service. The body of the valve is formed in two sections which can be applied to the outside surface of the water pipe and secured together in precise alignment with one another by tapered pins. A reciprocating gate which forms the valve element is bifurcated and includes a pair of gate sections carrying knife edges which cut through the pipe wall when the gate is initially moved to its closed position. This cuts away a ring from the water pipe and permits the gate to function to control water flow through the valve. The scrap ring which is cut away from the pipe is forced by the gate into a cavity disposed out of the flow line. The gate crushes the ring against a complemental convex surface of the cavity. Camming interaction between the leading ends of the gate sections and the convex surface mechanically forces the gate sections away from one another to press them firmly against the valve seats when the gate is fully closed.

Abstract: A double disc gate valve of the type wherein discs are provided with wedge means which force the discs against substantially parallel opposed valve seats having at least one spherical surface between a wedge and a valve disc to allow the discs to have more freedom of movement to accommodate misalignment of the seats due to variation in manufacturing tolerances or pipe line distortion.

Abstract: A gate valve is disclosed having a secondary seal, wherein the gate forms a metal to metal seal with the seat and wherein a resilient seal is moved toward the gate in a closed position to form a secondary fluid-tight seal with the gate. A device for deenergizing the secondary seal is provided in order to prevent wear of the secondary seal upon opening of the gate and also to reduce the gate drag caused by the energized secondary seal. Also disclosed is a pressure relief mechanism for the secondary seal adapted to prevent damage to the seal and a mechanism for evenly applying opposing secondary seals.

Abstract: A gate valve having a casing, a seat, a gate having a tapered face made in the gate surface in the direction of its movement in the shut-off direction on the side opposite to the side facing toward the seat, a stop provided for engaging the tapered face of the gate, the stop being secured to a rod which is installed transversely of the centerline of a passage of the casing, a sleeve installed in the casing wall for rotation relative to the casing, the inner surface of the sleeve being coaxial with, and surrounding the rod, and the longitudinal centerline of the outer surface of the sleeve being eccentric with respect to the longitudinal axis of the rod.

Abstract: A toggle gate valve having a double block and bleed retractable sealing configuration which utilizes accurately positioned steel inserts as trim assembly guide plates to permit a significant reduction in valve body machining. The valve body as well as removable upper and lower bonnets form a pressure boundary that houses a toggle link actuated seal plate to close the valve and a through-conduit that is coaxially aligned with the input and output ports when the valve is opened. A novel stem configuration and removable through-conduit permit field servicing of the trim assembly (plug and seal plate) by means of access through the lower bonnet/body interface.

Abstract: A valve assembly for controlling the flow of fluid has a housing defining a valving chamber accommodating a transversely movable valve plate. A manually operated lever connected to the valve plate with a rod is operable to move the valve plate between open and closed positions. A resilient member mounted on the housing within the chamber surrounds the fluid outlet opening in the chamber. Rails secured to the housing cooperate with the valving member to hold the valving member in sealing engagement with the resilient member when the valving plate is in the closed position. The valving plate may be connected with a remotely located actuator lever mounted on a tubular member secured to the valve housing.

Abstract: The present Airfoil Fuel Ejection Device consists of a retractable bulkhead(s) located in the under-side of the airfoil. The retractable bulkhead(s) is actuated through a combination of rotable worm gear drive shaft, rigid rod guidance members, drive motor, gaskets and remote control mechanism acting in unison. Specific embodiments of the Airfoil Fuel Ejection Device act through levers, support members, tracks, cylinders and pistons, brackets, interior bulkheads and guides. All the embodiments embrace a retractable bulkhead(s) seated in gaskets contoured to the circumference of the bulkhead in order to allow the latter to assume a flush position with the remainder of the under-side of the airfoil during normal flight operations. In addition the gaskets in conjunction with rigid rods assure a secure closure which deters inadvertent leakage or dumping while maintaining the structural integrity of the airfoil.

Abstract: A single valve element disc and seat gate valve has an in-line flow passage therethrough. The valve seat plane is inclined approximately 5.degree. from the valve stem. First and second cam surfaces are positioned outside the flow passage, and are inclined approximately 30.degree. from the stem axis so that the cam surfaces and the valve seat plane define a wedge for receiving the valve disc and a hanger supporting the disc.The valve seat is a frustoconical surface. The valve disc is fixed to the hanger by means for urging the valve disc against the seat at the center thereof in a manner to ensure an effective seal therebetween. The gate valve includes a back seal for permitting the stem seal to be removed and replaced while the valve remains in service.

Abstract: Apparatus for controlling fluid flow through a gate opening includes frame means that define the opening, and guide means which are adapted to retain a gate disc in slidable relation with the opening. Drawing means for laterally displacing the disc relative to the opening are pivotably connected to lever means having long and short ends. A fulcrum between the ends is pivotably connected to the disc. The short end is disposed to bear against a fixed portion of the guide means when the disc is closed, and the long end is connected to the drawing means to obtain a mechanical advantage in drawing pressure when displacing the disc to a partially open position. The lever means may be a single lever, but a preferred embodiment discloses a pair of levers to apply a uniform drawing pressure on the disc via a hydraulic cylinder that is anchored in a wall of a closed tank which contains the apparatus.

Abstract: A wedge-type gate valve with a one-piece gate or wedge movable longitudinally of itself in the valve chamber and transversely of the flow passage between open and closed positions. The gate is a one-piece structure having longitudinal V-shaped guide grooves in opposite edges thereof into which extend aligned, conical guide pins carried by the valve body. The edges of the wedge are also provided with inclined cam grooves engageable by the guide pins to cam the wedge against one of its seats in the open position of the wedge. The wedge is provided with a lubricant annulus communicating with one or both valve seats in the closed position of the wedge, the lubricant annulus being provided with a suitable lubricant through a threaded actuating stem. The inner end of the actuating stem has a doubly-tapered radially-outwardly-convergent head disposed in a complementary socket in the wedge, with seals between the wedge and such head, on both sides of the head.

Abstract: A positive acting valve suitable for operation in a corrosive environment is provided. The valve includes a hollow valve body defining an open-ended bore for receiving two, axially aligned, spaced-apart, cylindrical inserts. One insert, designated the seat insert, terminates inside the valve body in an annular face which lies within plane normal to the axis of the two inserts. An elastomeric O-ring seal is disposed in a groove extending about the annular face. The other insert, designated the wedge insert, terminates inside the valve body in at least two surfaces oppositely inclined with respect to each other and with respect to a plane normal to the axis of the two inserts. An elongated reciprocable gate, movable between the two inserts along a path normal to the axis of the two inserts, has a first flat face portion disposed adjacent and parallel to the annular face of the seat insert.

Abstract: A box discharger particularly suitable for ladles and the like, of the type comprising reloadable refractory plates and with a wedge locking system, which reduces the operation for positioning the tilting plate with respect to the stationary plate to the adjustment of a single element instead of several elements as required by the present art.

Abstract: A gate valve construction is provided and comprises, a valve body having an inlet and a discharge orifice, a flexible gate for the discharge orifice, and a mechanism for supporting and moving the gate in front of and away from the orifice with the gate being adapted to be sealed against the orifice by upstream pressure defining a dished configuration in the gate which is concave toward the inlet.

Abstract: A quick-closing fire gate is provided having specific application to sectionalized production facilities using vibratory conveyors to transport volatile substances. The conveyor passes through a portal defined by a gate housing at each barrier wall. The gate door or blade initially positioned above the housing is knife-edged to sever the conveyor during its downward translation and is forced flush against the gate housing by the interaction of opposed inclined surfaces on the blade and its support structure. The inclined surfaces furthermore function to eliminate gate rebound by dissipating the kinetic energy of the falling blade and redirecting reaction forces away from the line of blade travel. The rapidity of gate operation is accomplished by a photosensitive cell detonating an explosive bolt which releases a pressurized piston connected to the gate blade.

Abstract: A sluice gate assembly is disclosed which includes a single-flange cast frame, a pair of elongated grooved gate disc guides mounted on the frame, a gate disc slidably supported by the grooved gate disc guides for vertical movement between a raised open position and a lowered closed position, and a wedge system for wedging the gate disc into sealing engagement against the frame when the gate disc is in its lowered closed position.

Abstract: Main steam isolation valves are required for both PWR and BWR nuclear steam supply systems. In the event of a main steam line rupture, these valves must prevent gross loss of steam. The pressure drop across the valves is a direct factor in the efficiency of the generating plant. The rate of steam flow through the valves is high. These conditions require large port diameter valves that are reliable, can close rapidly, have low pressure drops, and are suitable for operation at specified design pressure and temperature. The valve of the present invention includes a parallel seat, fully revolving, double disc gate valve and fully satisfies the above requirements. The valve of the present invention embodies a valve operating mechanism which is fully enclosed within the primary pressure containment of the valve. This precludes any part of the operator being damaged by missiles resulting from other system failures.

Abstract: The quick action slide valve comprises a valve casing and a sliding plate sliding in an annular groove in the product pipe. The annular groove in the product pipe is closed by a collar and at the side opposite to the sliding plate braking means are provided to stop the plate inelastically when the slide valve is closed. The sliding plate is provided on one surface with wedges which slide upon bolts in the annular groove when the valve is closed. Guide means rigidly connected with the valve casing protrude into a recess of the sliding plate when the slide valve is open. In the said recess at the end of the guide means a propellant charge is mounted which is ignited by ignition means running to the outside through the guide means when a certain pressure is exceeded.

Abstract: The specification and drawings disclose a valve assembly particularly suited for use in septic systems for diverting flow from a single inlet to either of two separate outlets. The disclosed valve comprises a relatively thin-walled, blow molded plastic housing which defines a valve chamber having an inlet and two outlets. Valve seats are formed integrally in the housing by the transition surface between the walls of the valve chamber and the outlets. A blow molded plastic valve element is provided which is adapted to be placed in the valve chamber to selectively close off either of the outlets. The valve element includes a hollow, generally wedge-shaped plastic body having a generally conically shaped sealing surface extending outwardly from one side thereof. Boss-like protuberances are provided in the valve chamber adjacent the outlets for releasably holding the valve element in position adjacent the selected outlet.