Abstract: The electromagnetic valve comprises a movable core (8) adapted to be drawn toward a fixed core (7) under the influence of a magnetic field of an excitation winding (5). The lower portion of the core (8) has a skirt (11) surrounding a cylindrical member (9) which is shaped such that the fluid moving from passage (2) to passage (3) will be directed radially relative to the skirt (11), so as to avoid the exertion of a force on the core (8) in its direction of movement.

Abstract: A valve provided with sound-reducing means, which sound-reducing means comprise a porous member.

Abstract: A magnet system for magnet valves for controlling liquids including an electromagnet and a permanent magnet that produces magnetic fluxes, the magnetic fluxes of which are oriented opposite one another in a working air gap formed between a free-floating armature and a magnet pole. To attain a course of the force of attraction acting upon the armature that becomes negative beyond a certain excitation of the electromagnet, and to reduce the trigger power for the electromagnet, a magnetic opposite pole is disposed on the side of the armature remote from the working air gap, forming a second working air gap, which is coupled to the magnet housing, optionally via a stray air gap, via a flow guide element annularly engaging the permanent magnet.

Abstract: A fast-acting solenoid actuated valve assembly is disclosed which utilizes a pressure biased primary valve member and a secondary solenoid actuated valve member. The solenoid is operative to initially partially open the secondary valve member to thereby vent the primary valve pressure biasing to thereby enable opening of the primary valve. The secondary valve member is moved to a fully open position by the force generated by the initial venting of the biasing pressure. The speed of operation of the present valve assembly renders it particularly well suited for use in motor vehicle air bag assemblies. Actuating circuits are also disclosed for actuating the valve assembly.

Abstract: Solenoid valve employing a loosely mounted rubber insert in a confining recess of the plunger for sealing an inlet port during closed condition of the valve. In case of adherence at the sealing surface of the inlet port with the rubber insert, initial acceleration of the plunger establishes an inertia impact to effectively break the bond, even at extremely low temperature.

Abstract: A microvalve has at least two pressurized-medium connections means forming a valve seat between the connections, a closure member cooperating with the valve seat, an electrical actuating unit deflecting the closure member, and a membrane which moves the closure member in opposition to he electrical actuating unit and adjoins a space which can be loaded with pressurized medium. The membrane has an area which is substantially reduced relative to the valve seat and is firmly joined to the membrane and also has a pressure-loaded area. The closure member has a ring-shaped pressure-compensation area which is opposite to the membrane and extends radially outwardly of the reduced surface of the membrane and counteracts the pressure loaded area of the membrane, the pressure-loaded area of the membrane and the pressure-compensation area of the closure member are essentially equally large.

Abstract: The apparatus for controlling a damper in an air conditioning system for a vehicle. The damper is used for selectively opening air outlets, and is constructed as a film damper having one end wound on a drive shaft rotatably supported in a casing. The drive shaft is formed as a hollow shaft having an axial bore therein, in which an electric motor with a reduction gear is arranged. The outer body of the motor is fixedly inserted to the shaft, and has an output shaft fixedly connected to the casing, so that a rotation of the motor causes a relative rotation between the motor body connected to the hollow shaft and the outlet shaft connected to the casing. As a result of the rotation of the motor body, the drive shaft is rotated, resulting in a desired movement of the film damper.

Abstract: An adjustable orifice comprising two half plates movable with respect to one another with adjusting holes for positioning the plates and flanges for holding the half plates in position.

Abstract: A device is set forth for interrupting a material flow by means of a shutter 5 fastened on a spindle 11, which spindle 11 is rotatably supported in a housing 1 of the device. The device is provided with a torsion spring 33 which is elastically deformable through rotation of the spindle 11, with substantially equal amounts of mechanical energy being stored in the torsion spring 33 through elastic deformation in a first position of the shutter 5. The material flow is shut off during this operation, and in a second position of the shutter 5 the material flow begins. The spindle 11 is provided with a permanent magnet 57 having pole shoes 61, 63 which are held against stops 109, 115 of a magnetic yoke 99 in the first position under the influence of the magnetic field of the magnet 57, and which are held against stops 111, 113 of the yoke 99 in the second position. The yoke 99 is provided with an electric coil 121.

Abstract: In a flow rate control valve comprising a fixed core made of a magnetic material provided with a coil arranged on a circumference thereof, a movable core and a valve body made of a magnetic material moved by an attraction by a magnetic force of said fixed core or a release from said magnetic force to open and close a valve seat and a movable member composed of a supporting spring, the fixed core is provided with a flowing conduit passing through an opening formed in a surface opposite to said movable member and the movable member is provided with a passage guiding a fluid, so that the total quantity of fluid can be smoothly flown without staying a part of the fluid.

Abstract: A rotary actuated valve choke or the like is remotely controlled by motor means fixedly mounted with respect to said valve to rotationally drive a stem thereof. Means are included to measure the rotation of said stem. Means are provided to measure valve output and appropriately control the energization of the motor in response thereto.

Abstract: A metering device for controlling the flow of granular material through a conduit. The metering device includes a electrical coil operably associated with the conduit, a ferromagnetic latching strip disposed in the magnetic field produced by the coil, and a pivoting gate including a magnet that is attracted toward and repelled from the latching strip as the direction of electrical current flowing through the coil is changed.

Abstract: A vacuum valve that forms a tight vacuum seal is disclosed. The valve incorporates a hollow, malleable, metallic O-ring that deforms and conforms readily under pressure to seal the space between a movable valve member and a valve seat. When the valve is closed, the O-ring is compressed between opposed machined surfaces of the valve member and the valve seat, readily deforming and conforming to those surfaces, thus creating a vacuum-tight seal thereat.

Abstract: A diverter valve for controlling a fluid flow without the sudden hammering pressure changes normally found in fluid control systems, and a method for assembling the valve. The valve includes a modular valve body with two substantially identical sections, each with a valve seat, oppositely arranged. The valve body also includes a T-shaped connecting section connected between the end openings of the two other sections. A valve stem shaft in the valve body has a two valve plugs facing together, with the two valve seats between the valve plugs, so that each valve plug moves against the flow of the fluid to a closed position. A valve actuator shifts the valve stem shaft axially between first and second positions so that first one plug is closed, and then the other. The second valve plug is removably attached to the shaft by means of a tube connected to the second valve plug. This tube slides over one end of the valve stem shaft until it contacts a shoulder, and attaches to the valve stem shaft in that position.

Abstract: A linear actuator comprising of two elongate resilient elements (10, 12) joined together at their opposite ends (13, 14), a first one of the elements is fixed at a point intermediate its ends (16) and the two elements (10, 12) are arranged to carry an electric current which causes the two elements (10, 12) to move apart when they are placed in a transverse magnetic field. The linear actuator may be used to control the opening and closing of a valve in a fluid dispensing device, where a needle (20) is attached to the second element (12), which needle co-operates with a valve orifice.

Abstract: An apparatus for processing semiconductor wafers at reduced pressure comprising a vacuum chamber and a pumping system connected with the chamber. The pumping system includes at least a roughing pump, an exhaust pipe connecting the chamber with the roughing pump and a valve inserted in the exhaust pipe for opening and closing gas flow therethrough. The valve comprises: a valve casing having valve inlet and outlet openings connected with the exhaust pipe; a valve seat comprising a gasket surrounding at least one of the openings and having a first surface; and a valve plug having a second surface, the second surface being parallel with the first surface and contacting airtightly with the gasket at a valve closed position, the valve plug being movable substantially in the direction of the first surface for closing and opening the valve, thereby causing the opening for gas flow to be opened or closed gradually by the movement of the second surface of the valve plug.

Abstract: A flush valve body has a passage which connects the inlet and outlet. There is a valve seat at one end of the passage and a diaphragm is positioned to control the flow of water through the passage and to close upon the seat. A guide member is attached to the underside of the diaphragm and a refill ring is attached to the guide member. The improvement is specifically directed to the exterior of the refill ring which has a plurality of recesses to channel the flow of water through the flush valve passage. The recesses have a portion of constant size and a portion of gradually changing size. There are fins which separate the recesses and the fins are always in contact with the interior of the passage. The stroke of the diaphragm when moving between fully open and fully closed positions is approximately one-half of the axial length of the refill ring.

Abstract: In a "half-turn" type two-disc tap, the two discs are superposed and in contact to adjust the flow rate of a liquid. Each disc has first and second openings situated on respective sides of a predetermined diameter of the disc. The first opening is situated in the central part of the disc and the second opening is situated at the periphery of the disc so that in the closed position of the tap is openings of each disc are separated from the openings of the other disc and in the maximum open position of the tap the first and second openings are respectively and conjointly superposed over an angle just less than 360.degree..

Abstract: A nozzle support arrangement in an electromagnetic valve includes a frame, a solenoid fixedly mounted on the outside of the frame, a valve element arranged on the inside of the frame and driven in advancement and retreatment by the solenoid, a nozzle arranged on the inside of the frame and arranged so as to be opposed to the valve element, and support member by which the nozzle is supported on the inside of the frame. The support member includes a plurality of spacer sections fixedly mounted in an upstanding manner on the inside of the frame, and a plurality of latching sections arranged respectively at forward ends of the respective spacer sections and rotatably latching the nozzle.

Abstract: The actuating mechanism of a normally closed solenoid valve has a push pin, or plunger, that is acted upon by the solenoid's armature to unseat a spring-biased spherical ball from a valve seat when the solenoid is operated from de-energized to energized. The pin is disposed in the flow path through the valve and executes reciprocating axial motion as the solenoid is energized and de-energized. The pin is guided by a portion of the wall describing the flow path. The pin has a slender cylindrical core that is surrounded by a plastic sleeve that has been over-molded onto the core. Because it is slender, the metal core does not interfere with the solenoid's magnetic circuit that operates the armature. The sleeve has a nominally circular O.D. that provides for the close guidance of the pin's axial reciprocation, and it contains slots that provides flow channels for the fluid passing along the pin when the valve is open.