Abstract: A valve construction having a housing provided with a chamber and ports leading to the chamber and having an axially movable piston unit disposed in the chamber to interconnect certain of the ports together in relation to the axial position of the piston unit that is caused by a condition responsive device operatively associated with the piston unit, the piston unit comprising a plurality of pistons disposed in spaced parallel relation and being secured together to be axially moved in unison in the chamber under the influence of the condition responsive device.

Abstract: A valve for simultaneously controlling the flow of two propellant fluids to a rocket engine. The valve has separate flow passages for the two fluids and a separate valve element for controlling the flow through each passage. A single solenoid simultaneously controls the movement of both valve elements and each valve element provides a portion of the path for the magnetic flux generated by the solenoid. Each flow passage leads to a series of openings in a wall of the engine, such openings serving as injection orifices to the combustion chamber of the engine. The openings are of small diameter and length so that the volume of the openings between the valve seat and the combustion chamber is relatively small. Separation of the two flow passages is accomplished without the use of flexible or sliding seals.

Abstract: Dual overlapping fire protection systems include a liquid supply means for supplying liquid under pressure, first and second branch lines connected to the liquid supply means, a plurality of liquid distribution outlets connected to each of the branch lines and located to provide fire protection to a predetermined area, the outlets connected to each branch being located to provide fire protection to the same predetermined area, activating means for automatically activating at least one of the outlets in each branch when a predetermined temperature is sensed, valve means for selectively disconnecting the liquid supply means from the outlets in each branch. The valve is designed to automatically activate the disconnected branch when one of the outlets in the other branch is activated.

Abstract: During engine operation at low induction passage pressure, a carburetor main metering rod and idle bleed valve are reciprocated between a rich position and a lean position in response to energization of a solenoid according to a pulse width modulated duty cycle, while during operation at high induction passage pressure, the metering rod and bleed valve are moved to the rich position by a piston/spring combination.

Abstract: The present valve is for use on an aerosol container having a propellant. It has an axially displaceable, tubular valve body with an eduction passageway leading up to an orifice located below an internal dividing wall, and a product discharge passageway leading up from another orifice located above this wall. An upper, annular, elastomeric gasket closes these orifices in the normal position of the valve body. A lower, annular, elastomeric gasket directly below the upper gasket normally closes a separate propellant discharge passageway in the valve in the normal position of the tubular valve body. When the valve body is displaced downward from its normal position, a first annular passageway is formed between the two gaskets to connect the eduction passageway to the product discharge passageway, and a second annular passageway is formed below the lower gasket to open the propellant discharge passageway to pass gaseous propellant from inside the container.

Abstract: A servo-control valve for a linear hydraulic motor wherein the control valve piston is isolated from the side loading of a cam and roller by employing a cam follower plunger, as a separate detached element coaxial with the piston. The valve piston and the cam follower plunger are maintained in intimate contact due to the constant back pressure applied by the hydraulic system. The plunger is encased in a cylindrical array of balls which are preloaded between the plunger and the piston chamber walls such that the plunger experiences essentially only rolling friction, but no sliding friction, as the plunger moves. This form of preloading of the balls eliminates the backlash associated with clearance around the plunger.

Abstract: A carburetor main metering rod is operated by a bracket carried on a vacuum motor or a solenoid armature to control fuel flow through a main fuel passage, and a bleed valve floats on and is operated by the bracket to control air flow to and thus fuel flow through an idle fuel passage. A gage measures the relative position of the bleed valve within an air bleed body to permit proper calibration of the carburetor.

Abstract: A tap for controlling a plurality of fluid circuits simultaneously, comprising a body provided with a bore into which the said circuits open, and a rotary control member.Each fluid inlet duct is provided with a valve member and the rotary control member is a stem, movable in translation, which is provided with cams and cut-aways and controls the opening and closing of the said valve members.The invention is applicable in particular to oxyacetylene torches.

Abstract: In a carburetor, an electromagnet energized according to a pulse width modulated duty cycle has a stationary pole member which drives a pair of permanently magnetic valves against the bias of a pair of permanently magnetic discs to control fuel flow through a main metering orifice and air flow through an idle air bleed.

Abstract: A carburetor controlled by a pulse width modulated duty cycle operated solenoid has a main metering rod and an idle bleed valve spring biased against a bracket carried by the solenoid armature. The armature is spring biased to a rich position against an adjustable stop and is pulled by the solenoid coil to a lean position against a portion of the solenoid coil assembly. The entire coil assembly is spring biased against a stop which is adjusted to establish the lean position of the metering rod and bleed valve.

Abstract: In a carburetor, an electromagnet energized according to a pulse width modulated duty cycle has a stationary pole member which drives a pair of magnetically responsive valves--one or both being permanently magnetic--to control fuel flow through a main metering orifice and air flow through an idle air bleed.

Abstract: The present invention is related to a fluid metering valve that is specifically constructed to provide fine metering at extremely low flow rates while still providing a full shut-off capability. The fluid metering valve of the present invention is specifically adapted to be utilized in conjunction with corrosive fluids or fluids containing suspended solid particles that would otherwise damage or clog a comparable precision needle valve.

Abstract: Electromagnetically actuable hydraulic control valve with a valve housing in which a series of valve bodies are disposed in control bores for longitudinal displacement between at least two shift positions, and with a pot electromagnet disposed on the valve housing. The valve has an armature in the form of a large-area, substantially flat plate provided between the pot electromagnet and the valve housing, to which armature at least a part of the valve body ends protruding from the valve housing are attached. The armature plate is provided on its flat side confronting the valve housing with a guide shaft protruding at right angles and guided in a slidingly displaceable manner in a bore in the valve housing.

Abstract: A mixing valve comprising a rigid structure containing an interior recess and inlet and discharge ports in communication therewith, and weir plates and a slide plate confined in the recess for movement of the weir plates transversely of the recess with respect to the ports and for movement of the slide plate longitudinally of the recess with respect to the ports, said weir plates and slide plate containing openings which in predetermined positions of the plates are aligned in exact registration with the ports, and which can be moved relative to each other and to the ports to vary both the ratio of the fluids to be mixed to each other and the total flow of the fluids through the mixing valve.

Abstract: A mounting sleeve having at one end a parison forming extension, and a stem shiftable within the sleeve and extension to open and close the same to passing fluid.

Abstract: A steering control system for a ship including a hydraulic rudder actuator, a reversible variable displacement pump for powering the rudder actuator, a valve system for controlling the pump in responsive to certain input signals, and a helm system for generating command signals. The valve system includes two parallel fluid flow paths with at least oe relief valve in each flow path for generating a differential pressure to control the pump output. The valve system also includes a control valve with two movable members, one moving in response to rudder motion and the other moving in response to command signals, and controlling the relief valves in the flow paths. A permanent magnet electric motor receives command signals from a manual helm or an automatic pilot or otherwise, and drives one of the moving members of the control valve.

Abstract: An electronic reversible motor operated valve assembly adapted to be controlled by a two-wire thermostat. The assembly includes a valve casing having a pivotally mounted valve member, and a reversible motor drive unit having forward and reverse motor windings which, when alternately energized, effect pivoting of the valve member between closed and open positions to control fluid flow through the valve casing. The assembly includes a triac having a first annode and a gate coupled across the two wires of the thermostat, and having a second annode and the gate coupled across separate end terminals of the motor windings. Commonly connected end terminals of the motor windings and the first annode of the triac are coupled to an A/C power source to afford biasing the triac. When the thermostat switches to an off state, the triac is biased on and the reverse motor winding is energized to pivot the valve to the open position.

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 control and selector unit for a dental handpiece is provided of the high pressure air driven type. The control and selector unit includes a bracket for supporting a handpiece, and a resilient metal strip having a free end extending into the bracket. The other end of the resilient strip is supported on the base of the control unit, and the strip acts as a pinch valve for a tube carrying high pressure drive air to the handpiece. The pinch valve releases the tube when the handpiece is removed from the bracket so as to cause the handpiece to be activated. The control unit may also include additional resilient strip pinch valve controls for controlling the supply of coolant air, or other gases, and water to the handpiece when the handpiece is removed from the bracket.

Abstract: The invention relates to an actuating device for an invalid of at least one electrical control circuit of an apparatus comprising a source of a fluid with a constant flow which is feeding at least a pipe with an open end and a branch, said branch feeding a pressure detector which controls, when said open end is closed, the switching on or switching off of an utilization circuit.

Abstract: A coupling member for a quick-fitting pipe coupling comprising two separate fluid passages communicating each through a different port formed in the sliding socket with two series of passages formed separately in the body and the locking member, thus affording the simultaneous coupling of a double fluid circuit by using a single coupling member.

Abstract: A multitube valve comprises a housing which has open front and rear ends with a plurality of channels defined between the front and rear ends each of a size to receive an individual tube therein and each including a support surface for the tube. A clamp in the form of a rotatable clamp roller has a journal extending outwardly from each side and it is engaged within respective clamp roller grooves which are defined in the housing on each side of the tube channels. The roller is movable by rotation along the grooves toward either the front or rear ends of the housing and it is of a size such that it cooperates with the support surface to compress the tubes therebetween and to at least partially close off the tubes when it is aligned over the support surface. The support surfaces are offset from each other in the longitudinal direction of the channels so that they operate at a separate time in respect to the positioning of the clamp for closing off the tube flow.

Abstract: An adjustable valve assembly as disclosed wherein a plurality of valve blocks may be stacked or ganged side by side, and each used to control a machine part. Each valve block has a solenoid actuated valve to control flow of fluid such as air into a piston and cylinder assembly to move a part of the machine. The air flow is adjustably throttled by a needle valve in either the forward stroke or return stroke of the machine part. The needle valve has a normal at-rest position and may be moved in two directions toward opening and toward closing to establish a variable orifice in the valve block. First and second line shafts extend transversely to all of the various valve blocks for actuating the needle valves in the several valve blocks. Such actuation includes for each valve block first and second drive trains from the line shafts to the needle valve member with first and second clutches in the first and second drive trains and selectively actuable for opening and closing movements of the valve member.

Abstract: A temperature responsive valve for controlling communication between multiple ports is disclosed in three embodiments. In a first embodiment first and second adjacent chambers in a valve body are separated by a valve and second and third adjacent chambers in the body are separated by a second valve. The valves include a common stem carrying movable valve elements for simultaneously opening and closing the same. A sliding seal between the second and third chambers isolates these chambers for all positions of the valve stem. In a second embodiment there is also a fifth chamber communicating with a fifth port, a third valve is between the fourth and fifth ports, and a third valve element on the stem communicates the fourth port with the fifth port as the third port is closed relative to the fourth port. In a third embodiment first and second adjacent chambers in a valve body are separated by a valve seat which is selectively closed by a thermally actuated valve stem carrying movable valve elements.

Abstract: A valve for simultaneous control of two fluid flows has two control elements linearly movable along parallel axes. The control elements pivotally engage opposite ends of a lever, and the lever is itself pivotally mounted on a part which is linearly movable to lift the control elements. The pivotal interconnection between the lever and the linearly-movable part can be locked by application of an electric control current. Locking can be effected by means of an electro-magnet or by interposing between the lever and the part a liquid whose viscosity is increased by the control current.

Abstract: A valve arrangement in which a follower is mounted on one end portion of a first valve member which extends into a space formed in a housing of the valve arrangement. The follower cooperates with a second valve member in a bore of the housing parallel to the bore in which the first valve member is reciprocatable. The bore in which the second valve member is arranged comprises a valve seat engageable by a portion of the second valve member, which is spring-biased in a direction in which the aforementioned portion thereof engages the valve seat, and the follower is arranged to move the portion of the second valve member away from its valve seat when the first valve member is moved in its bore in a predetermined direction.

Abstract: A thermostatically responsive valve is provided which comprises a thermal element assembled with a housing to sense the ambient temperature, a plurality of responsive valves arranged around the power member of the thermal element within an interior of the housing to control the vacuum applied to pneumatically operated devices, and a spring-loaded movable member separably engaged with the power member within the interior of the housing to operate the responsive valves in response to the movement of the power member.

Abstract: A hydraulic control valve for transmitting power from a transmitter to a receiver which is remote from the transmitter. The power is transmitted through an actuating line from the transmitter. The transmitter is in the form of a housing which contains both a pressure relief valve permanently connected to the line and synchronising mechanism for synchronising movement of the transmitter with the receiver.

Abstract: The device of this invention was developed for utilization in a pneumatic oil well pump actuator. The snifter valve performs a bleeder valve function in the control mechanism of a piston in a cylinder. The controls to which this invention is particularly suited comprise a shifting floating pistion bleeder valve in conjunction with the improved snifter valve to replace a conventional button bleeder valve, in addition the device incorporates braking components in the snifter valve constructed to arrest and cushion the piston at each end of a cyclic stroke.