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Class 251/26 - Alternative pressure sources or pilot valve


Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter in which the servo-motor may receive fluid
No. of patents: 116
Last issue date: 02/02/2010


1      
NumberTitleIssue Date
7654503Pilot valve
A valve assembly is disclosed that includes a main valve, a pilot valve, and means providing fluid communication between the main valve and the pilot valve. The main valve includes an inlet, outlet, and means adapted to selectively open and close fluid flow between ...
02/02/2010
7331562Blowout preventer with breech assembly
A blowout preventer which, in certain aspects, has a main body with a main top, a main bottom, and a main bore therethrough from the main top to the main bottom, at least one breech assembly secured to the main body, ram apparatus movable within the breech assembly ...
02/19/2008
7328817Device for dispensing a heated liquid
A device for dispensing a heated liquid, such as a hot melt adhesive, which includes a dispenser body adapted to dispense the heated liquid, a solenoid valve, and a pneumatic section including a housing coupled between the solenoid valve and dispenser body. The pneu...
02/12/2008
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
7303147Sprinkler having valve module with reciprocating valve seat
A sprinkler includes an outer case and a riser mounted for reciprocation within the case. The riser supports a nozzle, an impeller, and a drive linkage connecting the nozzle and the impeller. A diaphragm valve is mounted in outer case beneath the riser and includes ...
12/04/2007
7299646Expansion valve having solenoid relief valve
An expansion valve has a solenoid relief valve equipped in an air conditioner for decompressing and expands a refrigerant and supplies the same to an evaporator. A high-pressure refrigerant from a compressor enters a valve chamber. The refrigerant traveling towards ...
11/27/2007
7273205Positive pressure actuated aerator valve assembly
A positive pressure actuated aerator valve assembly adapted to discharge compressed gas into the chamber of a bulk material handling structure. The aerator valve assembly includes a housing and positive pressure actuated valve. The housing includes a chamber adapted...
09/25/2007
7252115Coupling solenoid valve
A coupling solenoid valve having a main valve unit and a solenoid operating unit, of which both side faces in the valve-width direction correspond to a first coupling face and a second coupling face for coupling another solenoid valve, wherein a binding member is mo...
08/07/2007
7252116Coupling solenoid valve
A coupling solenoid valve, of which both side faces in the valve-width direction are coupling faces for coupling another solenoid valve, including a main valve unit for switching a fluid channel using a spool, and a solenoid operating unit for driving the spool, whe...
08/07/2007
7234678Protection system for turbo machine and power generating equipment
A limit switch 6 is placed on an end portion of the trip rod 4, which converts the mechanical deviation of the trip rod 4 into an electrical signal. The electrical signal from the limit switch 6 is transmitted to quick acting solenoid val...
06/26/2007
7232110Automatic flush actuation apparatus
An automatic flush actuation apparatus, which is incorporated with a flushing system having a water inlet, a water outlet, and a water chamber communicating therebetween, that includes a valve member being moved by a flush lever for releasing the water pressure with...
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
7178704Electrically-operated dispenser
An electrically-operating liquid dispenser having an U-shaped pole. Windings of an electromagnetic coil are wound about the legs of the U-shaped pole and are energized selectively for moving an armature relative to the pole to open and close the dispenser. The U-sha...
02/20/2007
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
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
7118087Coupling solenoid valve
A coupling solenoid valve having a main valve unit and a solenoid operating unit, of which both side faces in the valve-width direction correspond to a first coupling face and a second coupling face for coupling another solenoid valve, wherein pilot valves are detac...
10/10/2006
7100628Electromechanically-assisted regulator control assembly
An electromechanically-assisted control system for use in a second-stage regulator. Regulator control assembly (20), also referred to as EMA assembly (20), includes a mechanical actuator sub-assembly (21) and an electromechanical actuator (EMA) ...
09/05/2006
7076896Control for an operating arm of an earthmoving vehicle
An earthmoving vehicle has an operating arm that is raised and lowered by a hydraulic system. The hydraulic system includes a drain line and at least one actuator connected to the operating arm. The actuator defines a variable-volume chamber connectable to the drain...
07/18/2006
7066176Reliability-enhanced apparatus operation for re-breathing and methods of effecting same
Methods and apparatus for enhancing reliability of, and monitoring, the operation of airway valves to enhance patient safety. Pneumatic control line pressure (positive or negative) for actuation of the airway valve may be specified at a given magnitude or within a s...
06/27/2006
7063103System for converting manually-operated flush valves
Disclosed is a method and system for converting or retrofitting manually-operated flush valves. A conversion system for converting an installed manually-operated flush valve includes a power module, a control module, and a driver module mechanically coupled to a man...
06/20/2006
7028975Flush valve structure
A flush valve structure to control flush water through a pressure difference mainly includes a case, a solenoid assembly, an upper intermediate board, a lower intermediate board and a main water ball. The upper intermediate board has a small water pressure release h...
04/18/2006
7021602Valve, actuator and control system therefor
A hydraulic control system for a valve actuator comprising a first control valve that regulates fluid communication from a fluid pressure source to a first fluid supply tank that is fluidly connected to the valve actuator. A second control valve regulates fluid comm...
04/04/2006
6994234Electrically-operated dispensing module
Electrically-operated dispensing modules capable of dispensing small volumes of a viscous liquid at high operating frequencies and reproducibly among successive dispensed volumes of viscous liquid without the occurrence of stringing. The dispensing module may includ...
02/07/2006
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
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
6938873Compound valve assembly for controlling high and low oil flow and pressure
A compound valve assembly for controlling oil flow includes a first and a second valve. The first valve is a pressure relief valve including a spring-biased plunger in a side gallery opening off a primary oil supply gallery leading to a pressure-actuated device. The...
09/06/2005
6929237Valve actuation system and methods for pipeline valves
The invention is therefore directed to a rotary valve actuating system coupled to a pipeline for a pressurized fluid, the actuating system being coupled to the rotary valve to selectively cause operation of the valve. The valve actuating system comprises at least tw...
08/16/2005
6910496Gas conversion assembly
A gas conversion assembly generally has a gas inlet and a gas outlet. The assembly includes a control mechanism for regulating the flow of gas from the inlet to the outlet. The control mechanism is constructed and arranged to adjust from regulating the flow of a fir...
06/28/2005
6883541Manual-automatic water faucet
A manual-automatic water faucet includes a shell installed inside with a water intake base, a water outlet valve, an electromagnetic valve, an induction device and a control device. The control device is composed of a valve rod, a spindle and a revolving button. The...
04/26/2005
6871834Circuit for operating a valve closure system
A circuit (10) for operating a bi-directional air motor (12) of a valve closure system for enabling a tank valve to be discretionally operated to either open or closed condition either at the tank by attending personnel or from a remote location, with ...
03/29/2005
6802339Assembly having a spring-loaded tandem control valve
The fitting, in particular a safety valve, operates according to the relief principle or according to the loading principle. The fitting is opened and closed by a plurality of control parts. The control parts are connected in series in the control line of the fittin...
10/12/2004
6766828Interlock valve
An interlock valve is formed by incorporating a main valve portion having a valve member into a first casing, incorporating a driving-side operating portion 2 having a driving piston for driving the valve member into a first end plate, incorporating a return-...
07/27/2004
6705342Modulating gas valve with natural/LP gas conversion capability
An electronically modulating gas valve comprising a modulating solenoid for simultaneously displacing two servo regulator diaphragms, one for controlling LP Gas outlet pressure and another for controlling Natural Gas outlet pressure. A switch is used to select opera...
03/16/2004
6659420Manual and automatic flow control valve
A manual and automatic flow control valve includes a valve body, a manual control unit, a hollow pressure-releasing device, a middle plate, an upper casing, and an electric controlled magnetic unit. The internal of the valve body has a water inlet chamber...
12/09/2003
6644346Spring-loaded tandem control valve
The fitting, in particular a safety valve, operates according to the relief principle or according to the loading principle. The fitting is opened and closed by a plurality of pilot parts. The pilot parts are connected in series in the control line of the...
11/11/2003
6637722Pilot operated microvalve device
A microvalve device for controlling fluid flow in a fluid circuit. The microvalve device comprises a body having a cavity formed therein. A pilot valve supported by the body is movably disposed in the cavity for opening and closing pilot ports formed in t...
10/28/2003
6584999Fluid pressure controller
A fluid pressure controller has an air supply valve plug displaceable under an action of pilot pressure of a pilot chamber. When the air supply valve plug is seated on a seat section, fluid communication between a supply port and a regulator port is inter...
07/01/2003
6540203Pilot operated microvalve device
A microvalve device for controlling fluid flow in a fluid circuit. The microvalve device comprises a body having a cavity formed therein. A pilot valve supported by the body is movably disposed in the cavity for opening and closing pilot ports formed in t...
04/01/2003
6478048Two out of three voting solenoid arrangement
A binary voting solenoid arrangement 10 is provided which operates in a "2 out of 3" manner to provide relatively high safety, low spurious tripping and a relatively low installation cost, while also enabling on-line testing of each solenoid individually ...
11/12/2002
6443419Fast working hydraulic valve
The invention relates to a quick switching hydraulic valve (7, 8) which opens or can be kept closed using an electric signal of low energy and which can switch very quickly with large passage. Regarding the known valves the switching valve according to th...
09/03/2002
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