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Class 251/30.05 - Fluid pressure sole means for biasing valve closed


Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter in which the force per unit area exerted
No. of patents: 130
Last issue date: 03/15/2011


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NumberTitleIssue Date
7905467Dual position pilot operated valve assembly
A dual position pilot operated valve assembly having a main piston, with a valve member, reciprocable within a valve body, wherein the valve body is adapted for sealingly mating with a valve seat and passage located intermediate the valve body inlet and outlet ports...
03/15/2011
7677527Dual position pilot operated valve assembly
A dual position pilot operated valve assembly having a main piston, with a valve member, reciprocable within a valve body, wherein the valve body is adapted for sealingly mating with a valve seat and passage located intermediate the valve body inlet and outlet ports...
03/16/2010
7600737Cutback poppet valve
A valve includes a valve body and a free floating poppet. The valve body includes an inlet, an outlet, and a fluid flow passage therebetween. The free floating poppet is disposed in the valve body, and is moveable between at least a closed position, in which the fre...
10/13/2009
7384022Seal arrangement for a piston valve
A sliding seal arrangement in particular for a valve having an anodised aluminium coating in contact with the seal. The coating is produced so that inclusions in the surface of the coating are substantially aligned. The direction of motion of the sliding seal in use...
06/10/2008
7357367Embedded high temperature valve
A high temperature valve for controlling gas flow includes an outer vessel, a valve housing, and a valve element. The valve housing is disposed at least partially within, and is at least partially surrounded by, a propellant gas flow passageway that is formed in the...
04/15/2008
7325563Electromagnetic valve
An electromagnetic valve generally has a housing, a valve element, an electromagnetic driving portion and a filter. The housing forms a fluid flow passage therein. The valve element is installed in the housing to control a flow of a fluid through the fluid flow pass...
02/05/2008
7325781Automatic bathroom flushers with modular design
A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou...
02/05/2008
7232106Tilted and stepped diaphragm for control valves
A diaphragm operated valve having the diaphragm attached at its lower end to a valve closure plug, and movable therewith, and attached at its upper end to a portion of valve body that forms the pressure cavity. The diaphragm has a stepped portion between its upper a...
06/19/2007
7188822Enclosures for automatic bathroom flushers
A bathroom flusher includes a flusher body, a valve assembly, an electronic control system, and a flusher cover. The flusher body includes an inlet and an outlet, and is designed to accommodate the valve assembly that controls water flow between the inlet and the ou...
03/13/2007
7174577Automatic proximity faucet
A hands-free faucet includes a sensing plate, a capacitor-based sensor circuit, a non-conductive valve housing, a non-conductive seating ring, and a conductive connector. Preferably, the capacitor-based sensor circuit is electrically connected to said sensing plate....
02/13/2007
7156363Bathroom flushers with novel sensors and controllers
A bathroom flusher (10) includes a body having an inlet (12) in communication with a supply line and an outlet (16) in communication with a flush conduit, a valve assembly in the body positioned to close water flow between the inlet and the outl...
01/02/2007
7140391Multiway valve
A multiway valve contains a housing having several inlets and outlets and a chamber. Several seats are provided and each is respectively associated with one inlet or one outlet. A closure element is provided which can move between the seats and at least one actuator...
11/28/2006
7124774Control valve
A control valve for regulating flow of fluids passing through the valve. The control valve includes a body with an inlet, an outlet and a passageway through which the fluid passes from the inlet to the outlet. The control valve also includes a displaceable column pr...
10/24/2006
7121522Device for the regulation of flow applied to flow valves working under pressure differential
A device for regulating flow comprises a main valve operating under differential pressure wherein the main valve has a main flow inlet and a main flow outlet. The main flow inlet is equipped with a valve seat over which a main shutter is adjusted in a perpendicular ...
10/17/2006
7118086Pinch valve with inlet and outlet ports
A pinch valve includes a body with a passageway extending therethrough, a flexible sleeve mounted within the body and surrounding the passageway, and a cavity between the sleeve and the body. An inlet opening provides control fluid flow into the cavity, while an out...
10/10/2006
7083156Automatic proximity faucet with override control system and method
A hands-free device includes a sensor, a motor, a pilot valve, a gear train, an arm, and, an override control. The pilot motor opens the pilot valve when an activation signal is received from the sensor. The arm is coupled to the gear train, and the override control...
08/01/2006
7048261Liquids dumping device
A process and apparatus for periodically dumping liquids in an installation, in which liquids are recycled or otherwise accumulate dissolved and/or suspended contaminants, which process and apparatus makes use of a container for a liquid which is alternately filled ...
05/23/2006
6974114Double valve flusher
A double valve flusher includes a body, a separating plate, an upper and a lower valve base, a movable valve, a film valve, a fixing member, and an electromagnet. An upper leak room is formed between the film valve and the upper valve base. A leak room is formed bet...
12/13/2005
6966536Flush valve device of flush toilet
A flush valve device 20 of a flush toilet includes a flush valve body 22 connected to a city water source and an operation unit 50. The operation unit 50 has an operation button 63 and a flexible inner cable 71, which is par...
11/22/2005
6962318Pulsed input shutoff valve
Methods and devices for shutting off flow in fluid lines by an automated remote sensor signal, when leakage is detected, are disclosed. A shutoff valve has an inlet for connection to the upstream end of the pressurized fluid line, an outlet for connection to the dow...
11/08/2005
6955334Reduced-energy-consumption actuator
A valve system (10) includes a piezoelectric transducer (44) mounted on its housing (16). To change the valve's state, a microcontroller (54) causes a valve driver (58) to drive current through the actuator's coil (12) at a ...
10/18/2005
6955331Axial valve
An axial valve has a housing, an inlet, an outlet, a valve seat between the inlet and the outlet, and a valve element cooperating with the valve seat, and is controlled by a pilot valve arranged between the inlet and the outlet, with the valve element being moveable...
10/18/2005
6916002Structural improvement of membrane valve
The membrane valve body includes at least two layers of chambers which is configured in the valve body, and at the interior of each said chamber a duct is mounted, out of which covered with the bigger air coupling. A membrane is arranged to separate the chamber from...
07/12/2005
6908277Speed governor for a pneumatic rotation motor
A speed governor for a pneumatic rotation motor having a pressure air inlet passage (15, 15′), an inlet valve (16; 56) including a flow controlling valve element (18; 58) located in the inlet passage (15, 15′), and a speed responsive ...
06/21/2005
6830229Two-stage valve suitable as high-flow high-pressure microvalve
A two-stage valve for controlling the flow of fluid from a pressurized fluid supply with an upper main body including a cavity with a contoured inner surface; a lower main body with at least one flow exhaust passage forming a primary flow path through the two-stage ...
12/14/2004
6805328Shut-off valve apparatus
A shut-off valve apparatus has a valve body and a valve member coupled to the valve body. The valve member is movable between a first position blocking material flow through the valve body and a second position permitting material flow through the valve body. A pneu...
10/19/2004
6736093Device for controlling at least one gas-changing of an internal combustion engine
A device for controlling at least one gas-changing valve (10) of an internal combustion engine includes a valve adjuster (20) with an adjusting piston (16) limiting two pressure chamber (17, 18). The lower pressure chamber (18) is ...
05/18/2004
6666277Low pressure pneumatic and gate actuator
A pneumatic actuator having AND gate logic characteristics is disclosed. The actuator has three chambers each divided into two chamber portions by respective flexible diaphragms. One of the diaphragms acts as a valve closing member and controls the flow o...
12/23/2003
6644351Booster pilot valve
A booster pilot valve operable at ultra low power levels is provided. The booster valve includes a moveable spool capable of directing a fluid flow to at least two different paths. The booster valve may be coupled to a piezotronic three-way valve, which c...
11/11/2003
6612536Remote shut-off valve
This invention relates to a remote shut-off valve, and in particular to a valve for the remote shutting-off of a fluid such as a main water supply. The remote shut-off valve comprises a diaphragm valve and a pilot valve which are connected together by way...
09/02/2003
6575186Multiple speed slit valve controller
Described is a system designed to control the slit valve used to isolate chambers in cluster tools used in integrated circuit (IC) fabrication. This method changes the slit valve door actuator pneumatic pressure and movement during the closing sequence. A...
06/10/2003
6557820Two-stage valve suitable as high-flow high-pressure microvalve
A two-stage valve for controlling the flow of gas from a pressurized gas supply with an upper main body including a cavity; a lower main body with at least one flow exhaust passage forming a primary flow path through the two-stage valve; a pre-stressed di...
05/06/2003
6536533Low pressure actuator for dry sprinkler system
Embodiments of a low-pressure actuator, for use in a dry, low-pressure, pressurized gas, liquid fire control and suppression sprinkler system, with a pneumatic/electric double interlock mechanism, which requires that two separate events, such as dischargi...
03/25/2003
6520157High-pressure injector with reduced leakage
The invention relates to an injector for an injection system for injecting highly pressurized fuel into the combustion chambers of internal combustion engines. An inlet from the high-pressure accumulation chamber feeds into a control chamber that can be c...
02/18/2003
6427967Valve, unit, assembly and system
The invention relates to a valve incorporating a flexible diaphragm, and improves upon known diaphragm valves to permit the use of a diaphragm-controlled valve in systems for which such valves were not previously suitable or utilized. There is provided a ...
08/06/2002
6349686Hydraulically-driven valve and hydraulic system using same
In a hydraulically actuated gas exchange valve, the initiation and termination of gas exchange is achieved with a hydraulically driven valve that functions by opening an actuation fluid passage to a high pressure inlet source and a low pressure drain, res...
02/26/2002
6244561Modulating expansion valve
An improved modulating expansion valve includes a housing having a high pressure side, a low pressure side and a piston reciprocally mounted in a portion positioned centrally therebetween. A manifold is sealingly mounted above the piston, and a high press...
06/12/2001
6227247Position driven hot gas proportional thruster valve
A thruster valve has a continuously positionable piston between a closed position and a maximum open position. The piston moves in response to the difference in pressure between the pressure in the intermediate annulus and the pressure behind the piston. ...
05/08/2001
6029693Valve driving apparatus
A valve driving apparatus for actuating a shutoff valve or a dump valve provided in a pipeline for conveying a gaseous or liquid substance. The valve driving apparatus is constructed by disposing a gas/oil type booster and a hydraulic pump between a gas p...
02/29/2000
6024114Solenoid pilot operated air activated piston driven double seat accumulator drain valve
A drain valve has an inlet (36) for liquids and small solids, an accumulation chamber (37) and an outlet (17). The outlet has a seal (13) which is connected to an air-activated piston (12). The piston is in turn connected to a positive air pressure inlet ...
02/15/2000
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