Class 251/50 - Line pressure connected dashpot or choke chamber

Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter in which an expansible chamber device is
No. of patents: 112
Last issue date: 01/31/2012

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Number	Title	Issue Date
8104739	Pulse valve The present invention relates to a pulse valve (10) with a closing body (18) that cooperates with a valve seat (22) and, in a first switching position, establishes a flow connection between a supply channel (12) and a discharge channel (	01/31/2012
7412989	Solenoid valve In a solenoid valve 10, an annular oil groove 66 is formed at a portion corresponding to a spring chamber 56 on the external surface of a sleeve 19, a drain passage 68 is formed to make an upper part of the annular oil groove 66...	08/19/2008
7367355	Twin manifold seat valve having solenoid actuation A twin manifold seat valve comprising at least two closure members S1, S2, S3 each functionally associated with at least one valve seat D1, D2, D3, D4. At least one of the closure members is moved to a blocking positi...	05/06/2008
7343934	Proportional pressure control valve with control port pressure stabilization A proportional pressure control valve which includes an electric first stage pilot having a single outlet port configured to provide a variable pressurized hydraulic fluid to the outlet port and at a pressure that is proportional to an electric input signal and whic...	03/18/2008
7344569	Closed position maintainable selector valve, knee torque device using the valve, and artificial leg A selector valve capable of maintaining a closed position for a while even if an operating force to a valve element (80) is eliminated when the selector valve (10) is switched from a closed position (braking state) to an open position. The valve elemen...	03/18/2008
7337768	Multiple capillary fuel injector for an internal combustion engine A fuel injector for delivering fuel to an internal combustion engine. The fuel injector includes a fuel injector housing, a system for metering vaporized fuel to the internal combustion engine, the system positioned within the fuel injector housing, and a system for...	03/04/2008
7278625	Metering valve A valve device for metering a fluid for metering a urea-water solution for the aftertreatment of exhaust gases from internal combustion engines, which contains elements that flex or are compressed under high pressure so that the volume of the working chamber can cha...	10/09/2007
7243671	Chatter resistant shuttle valve A chatter resistant shuttle valve is provided to direct fluid flow from at least two sources of pressurized fluid to a downstream apparatus. The shuttle valve includes a valve body with a shuttle valve member movably mounted inside. A dampening chamber is provided w...	07/17/2007
7234650	Three-way valve and fuel injection device having the same A three-way valve having a valve chamber with a low-pressure port, a high-pressure port, and a control port is provided. The three-way valve also has a control valve installed in the valve chamber for closing one of the low-pressure port and the high-pressure port. ...	06/26/2007
7195027	Solenoid valve The present invention relates to a solenoid valve. The end of valve, which points away from the magnet core towards the magnet armature, bears against an area of a valve tappet remote from the valve seat. The valve tappet is positioned so that it can be displaced in...	03/27/2007
7175114	Fuel injector A fuel injector for fuel injection systems of internal combustion engines, having a valve needle which works together with a valve seat face to form a sealing seat, has an armature acting on the valve needle. The armature is movably guided on the valve needle and is...	02/13/2007
7156368	Solenoid actuated flow controller valve A flow control valve for controlling the flow of fuel in a fuel system including a housing with a fuel passage, a valve device movable to close the fuel passage to block fuel flow through the fuel passage, and to open the fuel passage to permit fuel flow through the...	01/02/2007
7124998	Electromagnetically actuated gas valve An electromagnetically actuated gas valve (5) for gas engines (4) includes a valve seat (13) that has at least one flow-through opening (14) and a corresponding sealing plate (15), with the sealing plate being movably arranged and ...	10/24/2006
7104283	Normally open hydraulic control valve A normally open hydraulic control valve includes: a linear solenoid unit; a spool driven by an output force of the linear solenoid unit to move forward; a valve body in which the spool is fitted; and a return spring for biasing the spool in a retreating direction. T...	09/12/2006
7082965	Solenoid control valve A solenoid control valve for use in actuation of a manual hydraulic clutch in a vehicle. The solenoid control valve has an electronically operated solenoid with armature and actuator rod displaced through a channel in the solenoid. A spool valve has a valve body tha...	08/01/2006
7066206	Damper device for hydraulic control valve A damper device for a hydraulic control valve includes: a valve body; a damper oil chamber to which one end surface of a spool is faced; an oil reservoir chamber which is adjacent to the damper oil chamber with a partition wall therebetween; and an orifice provided ...	06/27/2006
7055547	Circuit balancing valve A circuit balancing valve includes a valve body having fluid flow passage extending therethrough. The fluid flow passage includes a fluid inlet passage-side in fluid communication with a supply line, and a fluid flow outlet passage-side in fluid communication with a...	06/06/2006
7040594	Solenoid valve When a plunger moves toward a side of a valve seat, an end face of a sealing member on a space side is separated from a surface of a seal housing groove, whereby a portion between a communication passage formed on an inner peripheral side of the sealing member is co...	05/09/2006
7025327	Valve actuation velocity control device For use in a valve assembly including a housing having an axis and defining an interior, with fluid provided in the housing and substantially filling the housing interior, a valve stem disposed in the housing interior and a piston attached to the valve stem, wherein...	04/11/2006
7007925	Electrohydraulic valve having an armature with a rolling bearing A solenoid operated valve has a valve body with a plurality of ports and a spool slidable within the valve body to interconnect the ports in different combinations. An actuator drives the spool into several operating positions. The actuator has a solenoid assembly w...	03/07/2006
6971725	Dampened vehicle emergency brake valve A valve for controlling an emergency brake system on an aircraft. The valve has separate poppets for controlling the flow of fluid from a supply line to the brake cylinders and from the brake cylinders to a tank return line. The poppets act on each other. A dampenin...	12/06/2005
6959907	Normally closed solenoid-operated valve A normally closed solenoid-operated valve is composed of a stationary element provided at one end of a stationary sleeve, a movable element slidably inserted in the sleeve to face the stationary element and provided at an external surface thereof with a communicatio...	11/01/2005
6959797	Piston-cylinder assembly with braking device In a piston-cylinder assembly comprising a cylinder in which a piston rod is installed with freedom of axial movement and which is filled with a blocking medium, a braking device becomes active when the piston-cylinder assembly moves faster than a defined speed and ...	11/01/2005
6957660	Pressure relief valve with bidirectional damping A pressure relief valve has a valve element that is biased by a spring into a closed position. A pressure being controlled is applied to the valve element to counter the force of the spring. When the pressure applied to the valve element exceeds the force of the spr...	10/25/2005
6948514	Solenoid operated spool valve with baffled dampening reservoir port and method of making same A solenoid operated spool valve has a dampening reservoir formed at one end of the spool and which is ported for immersion in a fluid sump. The reservoir port is oriented vertically above the spool and a cap with an offset port is received over the reservoir port to...	09/27/2005
6945479	Stroke-controlled valve as fuel metering device of an injection system for internal combustion engines A stroke-controlled valve as a fuel metering device of an injection system for internal combustion engines has a valve body with a valve seat and a valve needle which is actuatable in the valve body counter to the resistance of a valve needle restoring spring and wh...	09/20/2005
6941934	Purge valve including an annular permanent magnet linear actuator A purge valve includes an aperture, a member, and an actuator. The aperture defines a portion of a vapor flow path that extends between a first port that communicates vapor with a fuel vapor collection canister and a second port that communicates vapor with an intak...	09/13/2005
6929238	Electric motor actuated stop and self-closing check valve An electric motor actuated stop/check valve for industrial use such as liquid pumping systems which has a controlled opening and closing rate when liquid flow is in a forward direction but closes quickly upon reverse flow of liquid with no action from the electric m...	08/16/2005
6902506	Limited slip differential with integrated solenoid valve and plenum An apparatus and method for controlling a limited slip differential uses a solenoid operated valve having an armature attached a differential case of the differential for rotation therewith, and an actuating coil operatively attached to a non-rotating differential h...	06/07/2005
6857440	Safety valve In a method for a safety valve plus such a safety valve, the safety valve has the form of a valve body axially displaceable in a cavity with an inlet on either side of which are arranged outlets, whereby liquid and/or gas flow takes place from the inlet and past the...	02/22/2005
6823887	Water heater shut off device with water pressure delay line A water supply shut off system includes a water pressure delay device which delays the transmission of any apparent change in water pressure between the input and the output side of the valve to the control input of the valve. This delay allows the input and output ...	11/30/2004
6796322	Hydraulic pressure regulating valve A hydraulic pressure regulating valve for regulating a pressure in an automatic transmission of a motor vehicle, comprising a magnetic part which includes an electrically controllable coil, a coil core and a movable armature, a valve flange which is anchored on the ...	09/28/2004
6796543	Electromagnetic valve for controlling a fuel injection of an internal combustion engine A solenoid valve for controlling a fuel injector of an internal combustion engine, including an electromagnet, a movable armature featuring an armature plate and an armature pin, as well as a control valve member, which is moved with the armature and cooperates with...	09/28/2004
6745993	Fuel injection valve A fuel injector, such as a fuel injector for fuel injection systems in internal combustion engines, includes a valve needle, the valve-closure member of which cooperates with a valve seat surface to form a sealing seat, and includes an armature engaging with the val...	06/08/2004
6739571	Solenoid valve A solenoid valve includes a movable member disposed in a sleeve for moving in an axial direction, a valve mechanism portion opening and closing in accordance with axial movement of the movable member to establish and interrupt fluid communication, a valve chamber ex...	05/25/2004
6719224	Fuel injector and fuel injection system A fuel supply system has a pump, a common rail, and injectors. Pressurized fuel is stored in the common rail. The common rail distributes the fuel to the injectors. A liquid fuel and a liquefied gas fuel such as dimethyl ether and a liquefied petroleum gas may be us...	04/13/2004
6655653	Method and mechanism to reduce flow forces in hydraulic valves A mechanism for controlling forces in a valve assembly such as flow induced forces. The valve assembly comprises a valve body defining first and second flow passages. A valve is movable in the valve body along an axis to control fluid flow between the fir...	12/02/2003
6575388	Fuel injection valve There is provided a fuel injection valve in which an operation sound at the time of an operation of the fuel injection valve is lowered, and durability of parts is improved. A flat surface 4a of a valve body 4 is provided at a lower surface side of a shou...	06/10/2003
6439257	Pressure control valve with hydrodynamic damping The invention relates to a pressure control valve (1) comprising a control piston (3) which is able to slide in a valve hole (4). Under the effect of an energy accumulator (5) said piston in one direction of displacement connects a pump connection (23) wi...	08/27/2002
6435472	Proportional variable force solenoid control valve with armature damping Proportional variable force solenoid valve for controlling the pressure of a fluid in a fluid control system comprises a solenoid housing having therein a solenoid coil, an armature movable in response to electrical current applied to the solenoid coil, a...	08/20/2002

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Class 251/50 - Line pressure connected dashpot or choke chamber