Abstract: A drill pipe tester valve includes a spherical valve member supported from an upward facing surface of a housing so that downward forces exerted on the valve member in its closed position, due to fluid pressure in a string of pipe above the valve member, are transmitted substantially entirely to said housing. A latching device is provided for latching the spherical valve member in its closed position as the string of pipe and tester valve are lowered into a well and for subsequently releasing the spherical valve member and allowing it to move to its open position when the string of pipe and tester valve are finally positioned within the well.

Abstract: The valve mechanism is of the type which is provided with a device for automatically controlling the motion of the valve body.The motion of the valve body is determined by the presence of pressure of medium at the outlet end of the valve and is adapted to be controlled by hydraulic damping means connected to the valve body and acting in one direction, manual adjusting means being adapted during opening of the valve, to effect a restricted initial displacement of the valve body in opening direction to permit pressure build-up at the outlet side of the valve.

Abstract: A temperature responsive drain valve (10) is disclosed for draining fluid lines (12) to prevent freeze up damage. The valve includes a housing (14) having a fluid passageway (15) therethrough. A temperature responsive thermal actuator (20) is mounted to the housing adjacent fluid inlet passageways (34). The actuator includes a temperature sensitive portion (22,23), which extends exteriorly of the valve housing and an output member which extends into the fluid passageway. A poppet valve member (42) has a self-aligning valve surface (46) and is mounted in the fluid passageway and biased toward a valve seat by a conical spring (47) which extends over a cylindrical portion (43) of the valve member. Cylindrical portion (43) is also guided by and extends through an opening (49) in a reaction plate (48). An outer biasing spring (51) reacts against the output member through a cage arrangement (54, 58, 67).

Abstract: A ball valve having a floating ball and an actuator for rotating the ball reduces operating torques by imparting an initial movement to the ball other than in the valve opening and closing rotation. This initial movement overcomes the adhesion friction, facilitating opening of the valve. The initial movement may be imparted by an asymmetrical configuration in the actuator or ball or means of a spring interposed between the two.

Abstract: A control valve for controlling a routing of a pressure medium in pneumatic conduits, especially those in motor vehicles, wherein the control valve includes a housing provided with a cylindrical recess and a control slide guided in the cylindrical recess in a longitudinally-displaceable fashion. A gasket or sealing arrangement is provided by means of which a central pneumatic conduit is alternatingly connected, after an operating stroke of the control slide, to a pneumatic conduit lying to the left and to the right of the central pneumatic conduit. The control valve further includes an operating sleeve longitudinally displaceable between two compression springs supported on the control slide and between two detent locations. The operating sleeve is arranged on the control slide in such a way that, upon operation of the operating sleeve, the control slide is braked as soon as sealing elements of the sealing arrangement abut against respective opposite valve seat surfaces.

Abstract: A valve is provided which includes a poppet enclosed in a plug of plastic material, such as Teflon, and which is biased against a seat by a compression spring so that a positive seal is provided even in the presence of cold flow in the plastic plug. A valve stem engages the poppet, and it serves to pull the poppet and plug away from the seat against the force of the spring when the valve is opened, and to force the poppet and plug against the seat when the valve is closed. The valve may be hand operated, or it may be operated by a pressurized fluid, such as air. An indicator is included in the assembly which provides a readily visible indication of any leakage within the valve housing.

Abstract: An engine poppet valve operating mechanism comprises a pivotal link which is positioned in use to engage the stem of the valve to be operated. An electro magnetic device has a winding which electric current can be supplied when it is required to open the valve. An output member forms part of the device and interposed between the output member and the link is energy storing means. The arrangement is such that when the device is energized the output member will move to an extended position and the movement of the link and valve will be at least partly effected by energy stored in the means during movement of the output member to the extended position.

Abstract: A safety device for an oil burner includes a pump which has a drive cylinder portion with a double-acting piston movable therein which is connected through a connecting rod to a suction piston portion which is movable in a suction portion of the pump cylinder. The oil burner is supplied with fuel oil from a supply line having a shutoff valve or valves which are connected through a suction line to the suction part of the piston. The suction portion is connected through a check valve to a return line and the drive cylinder is connected on respective opposite sides of the piston through valve means for regulating the movement of the drive piston so that it moves after the burner is turned off to displace the suction piston to effect a suction on the supply line to the oil lance of the burner so as to withdraw the oil therefrom.

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: A valve is provided which includes a poppet enclosed in a plug of plastic material, such as Teflon, and which is biased against a seat by a compression spring so that a positive seal is provided even in the presence of cold flow in the plastic plug. A valve stem engages the poppet, and it serves to pull the poppet and plug away from the seat against the force of the spring when the valve is opened, and to force the poppet and plug against the seat when the valve is closed. The valve is closed by a pressurized fluid, such as air, and is opened by means of a spring when the air pressure is removed. The Teflon plug is provided with a sharp corner which contacts a conical seat creating a seal when the valve is closed. The sharp corner of the plug wipes the seat of the debris as the valve is opened and closed.

Abstract: A pressure biased control valve holding the valve in the actuated position against the force of a return spring operating in connection with a linkage having a separate return spring and a loss motion connection to allow the valve and linkage to operate independently to the return position and assure the pressurized fluid in the valve maintains the valve in the actuating position regardless of pressure changes in the hydraulic system.

Abstract: A transmission control for a motor vehicle includes a valve and a spool mounted in the valve biased to extend therefrom. A spool actuator member controls extension of the spool from the valve. A spool control member is connected to move in response to movement of an operator control. An adjustable engaging member on the spool control member moves a predetermined distance free of forced engagement with the spool actuator. Subsequently the engaging member engages and moves the spool actuating member.

Abstract: Improved self-grinding valve is provided with corrosion-protecting features and an improved floating coupling between the valve stem and valve disc whereby, when the valve disc is brought into contact with its seat, a selected rotation of the valve disc will produce a grinding of the seat, followed by a disengagement of the valve stem from the valve disc. When this disengagement takes place, the full torque load of the stem can be imposed upon the valve disc to obtain the desired seating of the same. The valve stem is advantageously comprised of improved telescoping and theadedly engaged sections that operate to relieve the forces used to hold the valve disc against the seat upon the initial opening of the valve whereby the amount of torque required to ultimately rotate and free the valve disc from its seat is materially reduced and seizing of the valve disc relative to its seat avoided.

Abstract: A coupling is mounted between a valve steam of a valve and a rod of a valve actuator. The rod includes an extension having a piston member at the end thereof which is received within a cylinder member mounted on the end of the valve stem. The extension and piston member thereof define with the cylinder member a chamber within the cylinder member. Force can be transmitted from the rod to the stem by full insertion of the piston member within the cylinder member. Hydraulic fluid under pressure from an accumulator secured to the cylinder member is in communication with the chamber to limit the force transmitted from the rod to the stem when the relative position of the rod with respect to the stem causes the piston member to be located intermediate of the cylinder member.

Abstract: A hydraulic function disconnect means is interposed between an operator's control lever and a spring centered hydraulic control valve for a hydraulic motor actuator. The means is operable when the hydraulically actuated element approaches a limit position to prevent any operation of the valve by the lever which would move the element toward the limit position while permitting operation of the valve which results in movement of the element away from the limit position. A solenoid operated detent is used to control the ability of the disconnect means to transmit movements of the lever to the valve. The hydraulic function disconnect means forms part of the linkage in a two blocking prevention device used on boom-type material handling equipment such as a cable equipped crane in which the hydraulically actuated element comprises the movable hook and the cable is drawn in or paid out by a hydraulic motor actuator.

Abstract: In a spreader of the type used for spreading particulate material onto a roadway and comprising an upper hopper having a lower material discharge chamber terminating in a lower discharge opening, a rotatable spreader element below the discharge opening and a valve mechanism between the discharge chamber and the spreader element for controlling flow of material from the chamber to the spreader, there is provided an arrangement for shifting the valve mechanism between an opened and closed position in response to the direction of rotation of the spreader element. When the spreader element is rotating in one direction, the valve mechanism is automatically opened. When the spreader is rotated in the opposite direction the valve mechanism is automatically closed. This valve operating feature is accomplished by transmitting force through the particulate material within the discharge chamber of the spreader device so that no physical connection is provided between the motor and the valve shifting arrangement.

Abstract: A valve is operated between open and closed positions by respective solenoids. The valve is latched in each of the open and closed positions by a snap disc mounted in a position fixed relative to the plunger, and a pair of shoulders fixed relative to the valve body.

Abstract: The present invention relates to a specially designed valve for incorporation in a fuel line between a pump and burner nozzle. In a preferred embodiment my valve device sucks back a limited amount of fluid after the valve is shut off.

Abstract: A multi-purpose attitude insensitive valve has a mechanical actuating mechanism with a non-valving function to permit selective actuation of the valve by a variety of means. In addition to being substantially attitude insensitive the valve is adjustable in sensitivity by way of external adjustment with no disconnection of any portion of the valve.

Abstract: A safety valve for use in fuel dispensing systems including a vapor recovery system and having a valve body, first and second inlets in the body, first and second outlets in the body, first and second, separate, fluid flow passages in the body and extending between respective ones of the first and second inlets and outlets, two valve seats in the body, one in each of the passages, a shaft extending through and rotatable in the body adjacent the valve seats, first and second clapper valves in the body, one in each passage, each clapper valve having a limited lost motion connection to the shaft to be rotatable therewith, with limited lost motion, between positions seated against and spaced from the associated valve seat, a pair of springs, one for each valve, biasing the associated valve towards its associated seat, and a holding device for holding the shaft in a position of rotation within the body wherein the valves are spaced from their associated seats, and for sensing an unsafe condition in the vicinity of

Abstract: A coupling is mounted between a valve stem of a valve and a rod of a valve actuator. A first fitting of the coupling is mounted on an end of the rod and a second fitting is mounted on an adjacent end of the stem. The first fitting includes an opening therein which loosely entraps an expanded portion of the second fitting. The first and second fittings respectively have aligned surfaces which are generally perpendicular to the rod and stem. The surfaces make contact during movement of the rod toward the valve for closure of the valve. A resiliently deflectable spring is disposed between the first and second fittings to limit the amount of force transmitted to the valve through the stem when the rod is in a position for backseating the valve.

Abstract: Fluid links are interposed between manual levers which control the motions of a machine such as a construction crane and associated spool valves which regulate the machine motions. In normal operation within predetermined safe limits of machine motions, pressurized fluid delivery valve means connected with the fluid links is conditioned by a normal signal from a safe machine motion sensing means and delivers pressurized fluid to the fluid links rendering the links "hard" so that the manual levers are enabled to effect safe machine motions. When an unsafe machine motion is sensed by the sensing means, the valve means responds to the interruption of the normal signal from the sensing means and is conditioned to interrupt delivery of pressurized fluid to the fluid links thus rendering the links "soft" and thus disabling the manual levers from causing machine motions beyond safe limits.

Abstract: A method of limiting backseat loading on a valve stem moved between a lower closed position and an upper open position engaging the backseat by an actuator having an upper stop position wherein the method includes the steps of setting a variable force transmitting coupling to a predetermined loading between a bearing surface and a gauging surface thereon, connecting the coupling to the valve stem in the lower closed position, lowering the actuator from the upper stop position, connecting the coupling to the actuator, raising the actuator to the upper stop with the backseat being below the upper open position, and increasingly connecting the coupling to the valve stem and the actuator until the backseat is engaged and the predetermined loading exceeded as ascertained by separation of the gauging surface from the bearing surface.

Abstract: An improved backflow preventing valve having an inlet passage opening to an intermediate chamber via an improved inlet check valve with the intermediate chamber opening to an outlet passage via an improved outlet check valve. A diaphragm chamber communicates with the intermediate chamber having a diaphragm therein dividing the diaphragm chamber into an inlet pressure portion opening into the inlet passage and an intermediate pressure portion opening to the intermediate chamber. An exhaust passage opening to atmosphere communicates with the intermediate pressure portion whereby fluid normally flows from the inlet passage through the intermediate chamber to the outlet passage but upon attempted backflow of the fluid, the improved check valves close with a positive closing action to prevent such backflow and, upon failure of the outlet check valve, the diaphragm flexes to open to vent such backflowing fluid out the exhaust passage.

Abstract: Described herein is a valve sub-assembly which, e.g., functions as a portion of a modulating valve preferably subjected to operating pressures of less than two atmospheres. This sub-assembly is especially designed to reduce hysteresis in the response of the valve to signal media. Hysteresis reduction is achieved through a departure from conventional sealing mechanism designs which achieves a reduction in the friction involved in the operation of conventional modulating valves.

Abstract: A tapered rotary valve plug fits into a tapered valve chamber and is rotated by an operating head or cap. Cam means are provided to automatically shift the operating head and valve plug axially as the head is rotated. A pin-and-slot connection between the operating head and valve plug is provided whereby rotation of the plug is delayed until the plug has been lifted from its seat, after which rotation of the plug takes place as rotation of the head is continued. Spring means, tensioned during the initial relative rotation of the operating head and plug, are provided for restoring head and plug to their original position relative to each other as soon as the valve plug has been loosened from its seat. Means are also provided for positively stopping rotation of the plug at full open or closed positions.

Abstract: An in-line ball valve having a locking device which permits the positioning of the valve member to a set position by operation of a valve handle with the valve member being locked in this position against any creeping movement by reason of flow-induced forces acting on the valve member. The valve also includes a handle design which permits the handle to be positioned on the shaft of the valve member in eight different handle configurations to provide for simplicity of installation and ease of adaptability to push-pull controls.

Abstract: A change-over valve controls a source of fluid under pressure to signal at an outlet line one of two different pressures in response to applied forces such as load on a vehicle. The valve has a rotary lever load application arm receiving the applied forces to rotate it against the force of a return spring. In unloaded condition the return spring vents the outlet line to atmospheric pressure. A spring loaded valve controls the fluid pressure path to the outlet line and is operated as the applied load force increases to provide fluid under pressure to the outlet line.

Abstract: In a multizone air control system employing constant flows of hot and cold air, the hot or cold air is variably mixed with recirculated air to provide zone temperature control.

Abstract: A high resolution micro-metering valve having a non-rotary needle valve supported between a pair of calibrated coil springs of widely different spring rates. The lower rate spring is axially adjustable in minute increments by the valve actuator to vary the loading on the higher rate spring in an amount proportional to the ratio of the two spring rates. The valve actuator is free of all backlash and all relative movement with the valve packing is restricted to non-rotary axial movement. The valve proper can be contoured at will to provide linear or non-linear flow characteristics without need for any change in either of the two coil springs.

Abstract: A vacuum valve comprises a housing having an inlet passage and a discharge passage with a valve seat defined within the housing between the inlet and discharge passages. A valve disc is engageable on the seat to close off the communication between the valve inlet passage and the discharge passage. An extension is formed on the top face of the valve disc adjacent each side edge and a lever member has an arm portion at each side which engages through the extension and which is receivable in a groove defined in the housing above the valve seat. A valve drive member is connected to move the valve disc toward and away from its seat and during the closing movement it acts on the lever member centrally to cause the outer arm portions to move outwardly and engage into the receiving groove and to both hold the valve against withdrawal from the valve seat and to aid in its pressing down against the seat in tight sealing engagement therewith.

Abstract: A fluid pressure control device for controlling a servo motor is disclosed, the control device being provided with at least one pressure control valve for controlling pressure in a working chamber of the servo motor and transmitting a thrust corresponding to the pressure in the working chamber back to a power input member; operation of the pressure control valve being derived from the power input member through a lost motion coupling means.

Abstract: A portable abrading tool having a cylinder body containing a double ended piston with a reduced dimension intermediate portion of the piston carrying two oppositely facing racks engageable with two gear units which in turn engage two additional oppositely facing racks on a shoe to cause reciprocation thereof. A valving mechanism may include a rotatably oscillatable gear sector containing a pocket recess loosely receiving a valve element in a lost motion relation. An aspirator may be provided for withdrawing air and abraded particles from the vicinity of a work surface.

Abstract: A hold-off resilient member for resisting movement of a plunger caused by an input force. The plunger initially moves a first control valve to permit air to enter a servomotor and develop an operational pressure differential in response to the input force. Further movement of the plunger will axially compress the resilient member as a function of input force to output force causing its peripheral surface to radially expand and actuate a second control valve. The actuation of the second control valve will permit air above atmospheric pressure to develop the operational pressure differential in response to the input force.

Abstract: A fluid valve suitable for either metering or pressure regulating fluids at various temperatures is provided for a fuel system as may be utilized in an aircraft gas turbine engine. The valve includes a ceramic or carbon pad which cooperates with a window in a valve plate to provide a variable area orifice which remains operational during large and sometimes rapid variations in temperature incurred from the use of different fuels.