Abstract: The present invention discloses a gate valve with a first side and a second side relative the throughbore. A circular body cavity is on the first side and a rectangular body cavity on the second side and a portion of the first side whereby the gate is operable to move up and down within the body cavities. Due to the rectangular body cavity, the seats are slimmer than the gate. A skirt assembly is used which is inserted over the gate to cover the gate opening when the gate is moved to the closed position to prevent debris and other contaminants from entering the body cavity. Four U-shaped seals are mounted to provide that the gate valve is a bidirectional gate valve with upstream sealing having back up downstream sealing in case an upstream seal fails.

Abstract: The disclosure relates to an electro-hydraulic control system for directing fluid to at least one hydraulic actuator, the system comprising at least one electronic controller; first and second pilot valves being electrically connected to the at least one electronic controller which is arranged to control the operation of the first and second pilot valves, third and fourth pilot valves being electrically connected to the at least one electronic controller which is arranged to control operation of the third and fourth pilot valves. A pilot operated main valve is configured to control fluid flow to at least one hydraulic actuator. Each of the first and second pilot valves and the third and fourth pilot valves is a fail-safe pilot valve arranged to drain a regulated outlet port to a low pressure reservoir if a spool of the fail-safe pilot valve becomes stuck in an open state.

Abstract: A current control circuit controls a linear solenoid valve provided in an oil pressure circuit to feed back an output oil pressure. The current control circuit includes a PWM signal generation part, a target setting part, a duty ratio setting part and a vibration detection circuit. The target setting part sets a target current value, which is a target value of an excitation current of the linear solenoid valve and periodically varies with a predetermined dither amplitude and a dither period longer than a pulse period of the PWM signal. The self-excited vibration detection part calculates a phase difference between the target current value and an actual current value and detects a presence of self-excited vibration because of a resonance of a feedback of the output oil pressure and driving of the linear solenoid valve in the dither period when the phase difference decreases relative to an increase in the target current value or the phase difference increases relative to a decrease in the dither period.

Abstract: A control circuit includes a computing unit, which computes a target oil pressure, a duty output unit, which outputs a drive electric current based on a result of computation of the computing unit, and a dither output unit, which applies a dither signal to a linear solenoid. The dither signal is added to the drive electric current outputted from the duty output unit and is applied to the linear solenoid. The dither output unit always applies the dither signal to the linear solenoid throughout an operation. The dither output unit reduces a pulse height of the dither signal in a dead zone in comparison to a pulse height of the dither signal in a control zone. In this way, even when an axial position of a spool is changed between the control zone and the dead zone, the amplitude of dither of the spool can be made generally constant. Thereby, it is possible to limit a change in an output oil pressure.

Abstract: A completion joint 100 has a sand control jacket 120 and an inflow control device 130. The jacket 120 communicates screened fluid with a housing of the inflow control device 130. The basepipe's flow openings 118 are isolated in the housing from the screened fluid by flow devices 170. The flow devices 170 are externally accessible on the device's housing to selectively configure the flow devices 170 open or closed.

Abstract: A dishwasher has a tub at least partially defining a treating chamber for receiving dishes for treatment according to an automatic cycle of operation. At least one wall of the tub has spaced outer and inner panels and a conduit framework extending between the outer and inner panels to define a plurality of conduits. The conduits can convey liquid, air, and/or electrical wiring.

Abstract: A rotary-to-linear motion actuator having helical bevel gear and methods of use thereof are described. The actuator may be utilized with an apparatus for managing a fluid flow passage between one or more input ports and output ports. A pinion gear engages, and during operation turns, a bevel ring gear arranged on a helical path along an external periphery of a sleeve retaining a seat, which forms a fixed orifice. The teeth of the bevel gear are arranged on the helical path at the same pitch as external threads on the sleeve, which in turn, engage internal threads in an apparatus body. The area of the flow passage is changed by movement of the fixed seat orifice axially with respect to a contoured plug assembly. The threads of the sleeve and the body resist axial load imparted by the pressure drop across at the fixed orifice.

Abstract: A restriction engaging system includes, a restriction engager, one or more restrictions, and at least one counter configured to permit or prevent passage of a restriction engager through one of the one or more restrictions.

Abstract: Disclosed herein is a selectively movable seat arrangement. The seat arrangement includes, one or more seat members movable between a passable position where a member is passable therethrough and an impassable position where the member is prevented from passing therethrough, and a counter in operable communication with the one or more seat members, the counter capable of allowing movement of the one or more seat members to the passable position to allow passage of a member a selected number of times and then to the impassable position thereby preventing passage of another such member for a period of time.

Abstract: A restriction engaging system includes, a restriction engager, one or more restrictions, and at least one counter configured to permit or prevent passage of a restriction engager through one of the one or more restrictions.

Abstract: Disclosed herein is a selectively movable seat arrangement. The seat arrangement includes, one or more seat members movable between a passable position where a member is passable therethrough and an impassable position where the member is prevented from passing therethrough, and a counter in operable communication with the one or more seat members, the counter capable of allowing movement of the one or more seat members to the passable position to allow passage of a member a selected number of times and then to the impassable position thereby preventing passage of another such member for a period of time.

Abstract: An improved sequencing fluid control valve comprising a housing having inlet and outlet ports, a valve seat disposed within the housing, a collapsible valve member disposed within the housing and forming a chamber and a bulb. A sequencing means disposed within the chamber that controls the axial motion of the valve member in response to application of fluid pressure at the inlet such that the motion of valve member alternates between an open free flowing state and a closed restricted flow state. Housing and valve member cooperate in the open position to provide an annular flow path that does not require the fluid flow direction to substantially change while flowing from inlet to outlet. Housing and valve member bulb cooperate in the closed position to form a circumferential seal to restrict the fluid flow. Alternative embodiments including viscous damping means and variations on the housing mount are described.

Abstract: An improved ball type valve rotator is provided that includes a main body segment having a bottom wall with an upper surface, and a body cap that overlies the main body segment. A ball cages assembly is housed between the main body segment and the body cap. The ball cages assembly includes multiple ramps with lower surfaces that are spaced from the bottom wall upper surface of the main body segment. This allows the multiple ramps to deflect toward the bottom wall upper surface of the main body segment. The multiple ramps can deflect independently of each other, so that different distances can be defined between the different ramps and the bottom wall upper surface of the main body segment. In so doing, the ball cage assembly can accommodate non-uniform applications of force into the valve rotator.

Abstract: A low energy stepper motor driven actuator that eliminates the need for a position sensor is provided. The stepper motor rotates a cam in a control piston valve. The cam rotation increases the gap between the cam and nozzle on one side of the cam and decreases the gap between the cam and nozzle on the other side. The gap differences affect the pressures on the control piston ends, which forces the piston in the direction that will re-equalize the cam-nozzle gaps. As a result, piston moves to a position such that the head or rod of the actuator piston receives high pressure flow, thereby moving the actuator. Movement of the actuator rod provides mechanical feedback to the cam, causing the cam to move back to its mechanical null position.

Abstract: A linear actuated disk valve for a fluid conveyance system constructed with a valve body having an internal chamber and a passage through the valve body, the valve body having opposite ends with external connectors that continue the passage and that are connectable to other components in the fluid conveyance system, the improvements being a displaceable cam action closure member in the chamber of the valve body, the closure member having a disk retainer assembly with a disk retainer and at least a pair of circular closure disks engageable with the disk retainer formed by a cam on the retainer and a cam track on the disk being laterally displaced on initial linear displacement of disk retainer with the disk retainer being connected to an actuator shaft with an improved sealing assembly for sealing the shaft at the top of the valve body.

Abstract: A linear actuated disk valve for a fluid conveyance system constructed with a valve body having an internal chamber and a passage through the valve body, the valve body having opposite ends with external connectors that continue the passage and that are connectable to other components in the fluid conveyance system, the improvements being a displaceable cam action closure member in the chamber of the valve body, the closure member having a disk retainer assembly with a disk retainer and at least a pair of circular closure disks engageable with the disk retainer formed by a cam on the retainer and a cam track on the disk being laterally displaced on initial linear displacement of disk retainer with the disk retainer being connected to an actuator shaft with an improved sealing assembly for sealing the shaft at the top of the valve body.

Abstract: A disc valve is linearly actuated to effect rotation of its sealing disc during opening and closing operations. Disc rotation is effected by creating unbalanced frictional forces between the sealing surfaces during valve operation. Rotation of the disc produces a lapping action that in the process medium renews and polishes the metal seating surfaces with each operation.

Abstract: In a pressure control valve, a filter member is disposed in a feedback path for feeding back fluid pressure in the corresponding control port to a pilot chamber for feedback controlling a position of the valve spool in cooperation with an electric or electromagnetic actuator. The filter member is so arranged as to remove foreign matter. The filter member also serves for regulating fluid flow in the feedback path.

Abstract: A solenoid operated control valve in an automatic transmission is operated by dither current. A flow rate of oil through the solenoid operated control valve is calculated. At least either one of the frequency and amplitude of the dither current is corrected by the flow rate. The solenoid operated control valve is operated by the dither current.

Abstract: The invention seeks to reduce structure-borne sound emissions of the reciprocating piston pump. The reciprocating pump is includes an outlet valve, which has a valve seat and a valve closing body that is received in a hollow space and is loaded by a closing spring. One outlet bore radially originates at the circumferential region of the valve seat and branches off from the hollow space. The opening of the outlet bore toward the hollow space extends at least approximately between the valve seat and the end toward the closing spring of the gap of least cross section, which is formed between the valve closing body and the inside circumference of the hollow space. As a result, a slowed opening motion of the valve closing element is attained, in which opening motion an opening gap opens up that has its largest flow cross section in the region of the outlet bore.

Abstract: A pressure regulator whose initial pressure can be set by manually setting the initial stress of a control spring has a double-seated valve with an inner and outer valve seat and a valve closing element. The valve closing element divides a supply pressure chamber from a control pressure chamber and the latter from a pressure-relief chamber. The inner valve seat is arranged on a control piston which is loaded by the control spring. In order to set a higher initial pressure, the initial stress of the control spring is increased, in order to reduce pressure, the initial stress of the spring is diminished. During this process, the outer or inner valve seat lifts off temporarily from the valve closing element until equilibrium is reestablished by a corresponding pressure chamber and the double-seated valve closes.

Abstract: A hydraulic control apparatus has a transistor which is changed over by a control signal inputted to an input terminal thereof; and a solenoid controlled valve having a spool actuated by a DC solenoid to be driven by exciting current whose pulse duration has been controlled by the transistor.

Abstract: Apparatus for maintenance of the moveable pipe sleeves (52), bearing surface and seals of a ball valve. The apparatus has a bonnet (7) designed to be secured to and form a tight connection with a valve flange (53) and fastened to the underside of the bonnet (7) there are: honing tool for honing of spherical sealing surfaces (56) and conical sealing surfaces (51) on a valve housing; dismounting tool for dismounting of old sealing rings on the pipe sleeves (52); mounting tool for mounting of new sealing rings on the pipe sleeves (52); rotating mechanism (8) for 90 degrees rotation of the honing tool (1) and the pipe sleeves (52).

Abstract: The disclosure is of a gate-like valve wherein a gate or carrier plate has upper and lower through bores movable into alignment with flow passages in the body. In the upper through bore is received a valve disc that is rotatable on the carrier between a closed position wherein it is in the plane of the gate to seal around the through bore and an open position wherein it is disposed along the axis of the through bore. A valve stem is coupled to the butterfly disc so that partial rotation of the stem operates the butterfly valve, and the stem is also engageable with the carrier plate so that when the stem is raised and lowered it raises and lowers the carrier plate to move the butterfly disc out of alignment with the flow passages.

Abstract: A precision vacuum melting and casting furnace with a melting chamber containing a melting device. A casting chamber is positioned below the melting chamber. The casting chamber can be raised, lowered, and swung out to the side. The casting chamber communicates with the melting chamber through a valve chamber, which contains a vacuum valve. The valve chamber accommodates a lift platform for raising the mold up under the melting device. The casting chamber has a lifting mechanism, and the vacuum valve has an activating rod. In order to essentially simplify precise alignment of the different movable parts and to convert an existing conventional casting furnace into a furnace in accordance with the present invention, a hollow vertical shaft is attached to the valve chamber. The rod that activates the vacuum valve extends vacuum-tight through the shaft. A sleeve that guides the casting chamber is positioned at the outer surface of the shaft.

Abstract: A gate valve presents on a flat valve seat surface defining a fluid flow path the mating flat surface of a freely rotatable circular disc carried at its center along a longitudinally moving straight line axis. The valve seat defines a fluid flow aperture asymmetrically disposed to the disc center movement line to thereby create a turning moment from pressure and flow of fluid through the valve seat. This serves without ratching mechanisms to rotate the disc periphery randomly thereby presenting different disc edge portions in a wear position from the fluid flow. Accordingly, wear is evenly distributed about the peripheral edge to significantly increase life and reduce sealing problems from chemical or sediment materials coming between the disc and valve seat surfaces. By mounting the disc and valve seat surfaces at an acute angle to the axis of movement, the disc is freely rotatable and subject to the turning moment up until the time they are frictionally wedged together in a sealed valve closure position.

Abstract: A float valve in this invention has a hollow body having a spigot adjacent an orifice, a valve seat surrounding the orifice, a float arm pivoted to the hollow body, and an abutment surface on the float arm engageable against an elastomeric valve member when carried by the spigot.

Abstract: A degreasing apparatus comprises a vessel (3) the lower portion of which is shut off by means of a bowl-shaped plate (5), to form a container (1) with a heating means (2) for boiling solvent. The bowl-shaped plate (5) has an opening (6) at its lowest point. A valve means (7) is arranged at the opening (6). The valve means (7) comprises a body, preferably a ball, which can seal against a seat which surrounds the opening (6). The density and size of the body are related to the size of the opening (6) so that the body floats up from the seat in the presence of solvent condensate, so that condensate can pass from the valve means to the container (1). Vapor pressurized in the container (1) by the heating means (2) lifts the body from the seat so that vapor can flow up into the treatment space of the vessel (3). When the apparatus is shut off, the body seals the opening (6) and thereby prevents evaporation of solvent from the container (1).

Abstract: A rotating disc gate valve for controlling fluid flow in a flow line comprising a valve body having a flow passageway and a cavity transverse to the flow passageway to receive a flow control assembly. The flow control assembly includes first and second valve seat carriers each having a plurality of valve seats thereon which are aligned to form valve seat sets and an independent rotation means for rotating the valve seat carriers whereby replacement valve seats can be axially aligned with the flow passageway without dismantling the valve body. The flow control assembly includes a flow control disc mounted between the valve seat carriers.

Abstract: A device for filling a container comprises an endpiece provided with an inner conduit equipped at its end with a ball-valve having a through passage and pivotable in the endpiece about a diametral axis transverse to the passage. An annular member having an external face coplanar with the frontal surface of the endpiece, has an inner spherical surface held in permanent contact with the external face of the ball-valve. The annular member is mounted for rotation with respect to the endpiece about the longitudinal axis of the conduit. At least part of the intersection line between the passage and the external surface of the ball-valve cooperates in cutting relationship with an edge of the external face of the annular member while the latter is rotating and the valve is pivoting to close the conduit.

Abstract: In order to increase life of a disc type valve, which exhibits wear in the presence of fluid flow, a circular freely rotatable closure disc is provided so disposed in its closure path to engage flow apertures asymmetrically thereby inducing a rotary motion which presents a randomly positioned part of the disc periphery in the wear position. Life is thereby substantially increased by distributing wear evenly about the entire periphery of the closure disc.A fast close embodiment is of the rotary disc type operable by a lever to move a flat disc surface over a flat seat containing a flow aperture of smaller dimension than the disc. The disc in accordance with this invention is freely rotatable and the movement path of the disc axis of rotation is asymmetrically disposed relative to the geometric center of the aperture to thereby induce rotation of the disc with random rotational positioning of the disc periphery over the flow aperture, thereby distributing wear about the entire disc periphery.

Abstract: A slide valve with a slightly wedge-formed valve member arranged to close a flow duct by a cross-wise movement relative to the duct. There are annular sealing surfaces surrounding the flow duct and they are engageable by sealing side portions of the valve member for closing the valve. The sealing side portions of the valve member are considerably narrower than the annular sealing surfaces of the flow duct and are, in the closing position of the valve, located at a relatively great distance from the inner edge of the annular sealing surfaces. The sealing side portions of the valve member are of a softer material than the annular sealing surfaces, and hence, are subject to a repeated grinding against the annular sealing surfaces, when operating the valve. The sealing side portions of the valve member may be located each to a separate slide unit journalled in a body portion of the valve member. The slide units are in that case arranged to be slightly rotated by the opening movement of the valve.

Abstract: A dump body adapted to be hingedly mounted on a vehicle so as to be tipped upwardly towards an end of the body, outlets in the body near said end, plate valves slidably mounted to close and open the outlets, and a fluid cylinder and piston operating unit connected to the plate valves for moving the latter between positions fully opening and closing the outlets. Flingers are normally provided so as to receive the particulate material, usually sand or salt, from the outlets to spread the particulate material.