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| Number | Title | Issue Date |
| 8172199 | Valve control apparatus and flow rate controller A valve control apparatus including a stepping motor coupled to a valve and a motor control unit for controlling the stepping motor is provided. The motor control unit includes a motor control section for applying drive pulses to the pulse motor, a counting section ... | 05/08/2012 |
| 8141844 | Flow rate accuracy of a fluidic delivery system Improving the accuracy of the flow rate of a valve in a fluidic delivery device in which a desired flow rate may be achieved by varying the duty cycle of the valve. The flow rate of fluid delivery from the valve over its lifetime is stabilized by minimizing the volt... | 03/27/2012 |
| 7740225 | Self adjusting solenoid driver and method A fluid dispenser having a dispensing valve movable between open and closed positions for controlling the flow of the fluid from the fluid dispenser. A solenoid is operatively connected to the dispensing valve and is capable of moving the dispensing valve between th... | 06/22/2010 |
| 7387289 | Method and apparatus for driving a solenoid proportional control valve utilized for flow rate control In a method for driving a solenoid proportional control valve (44) used for flow rate control of a common rail system pump adapted to regulate flow rate by regulating the duty ratio of a pulse voltage applied to a solenoid coil (F) of a solenoid (44E),... | 06/17/2008 |
| 7377480 | Electrohydraulic valve servomechanism with adaptive resistance estimator A servomechanism includes a controller which dynamically estimates the resistance of the solenoid coil in an electrohydraulic valve as part of determining a level of electric voltage to apply to open the valve. The servomechanism receives a current setpoint designat... | 05/27/2008 |
| 7325781 | Automatic 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 |
| 7287396 | Evaporator pressure regulator control and diagnostics An apparatus for refrigeration system control includes a plurality of circuits, each circuit having at least one refrigeration case and an electronic evaporator pressure regulator in communication with each circuit. Each electronic evaporator pressure regulator cont... | 10/30/2007 |
| 7284370 | Positioning control apparatus A positioning control apparatus includes a position detector 102 which detects the position of a positioning object 101, a target position generator 103 which generates a target position signal based on an output from the position detector, and ... | 10/23/2007 |
| 7273206 | Electromagnetic valve An electromagnetic manipulating portion of an electromagnetic valve includes a fixed iron core fixedly disposed in the inside hole of a bobbin and a movable iron core movably disposed in the inside hole and attracted to the fixed iron core by a magnetic attraction f... | 09/25/2007 |
| 7255100 | Electronic gas cooktop control with simmer system and method thereof An electronically activated gas cooktop control system, responsive to a touch-sensitive user interface, and capable of providing a predetermined range of cooking and simmer levels of BTU output, has two complementary heating modes of operation A first heating mode o... | 08/14/2007 |
| 7237516 | Method for controlling an actuator, using a retaining mark space ratio The invention relates to a method for controlling an actuator which can be displaced between two end positions, said actuator being impinged in one end position and being capable of displacement to the other end position by an electromagnetic part. The actuator is f... | 07/03/2007 |
| 7188592 | Position sensor of a valve actuator for an internal combustion engine A sensor of the position of a target is secured to an electromagnetic or electromechanical valve actuator of an internal combustion engine. The target is driven by a reciprocating translatory motion (f+, f−) in synchronism with that of the va... | 03/13/2007 |
| 7188822 | Enclosures 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 |
| 7177725 | System for the monitor and control of rest rooms The present invention is directed to a rest room control system including one or more sensors configured to monitor or control a function associated with the rest room. The system also includes a controller operably coupled to the one or more sensors, and configured... | 02/13/2007 |
| 7165754 | Electromagnetic valve The invention relates to an electromagnetic valve, the valve coil of which is actuatable by an electric current for removing deposits at the valve seat and the valve closure member in such a manner that the valve closure member impinges upon the valve seat with a de... | 01/23/2007 |
| 7156363 | Bathroom 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 |
| 7158865 | Current driver employing pulse-width modulation A current driver capable of generating a controlled current in the form of a pulse-width modulation (PWM) signal suitable for controlling an electronic device such as a solenoid is disclosed. The current driver has a feedback loop incorporating a dual-slope integrat... | 01/02/2007 |
| 7156365 | Method of controlling microvalve actuator In a method of controlling an actuator of a microvalve, a controller is provided for supplying a voltage to the actuator. The controller provides an initial voltage to the actuator which is effective to actuate the microvalve. Then, the controller provides a pulsed ... | 01/02/2007 |
| 7154326 | Dither amplitude correction for constant current drivers In satisfying the above need, as well as overcoming the enumerated drawbacks and other limitations of the related art, the present invention provides an improved switched driver circuit. As disclosed above, there is a need to compensate for the high impedance load c... | 12/26/2006 |
| 7143956 | Suck back valve A suck back valve includes an ON/OFF valve mechanism which opens/closes a fluid passage by displacing a valve member together with a first piston under an action of a pressure fluid supplied into a first cylinder chamber, and a suck back mechanism which has a suctio... | 12/05/2006 |
| 7077290 | Beverage forming and dispensing system A beverage dispensing system includes separate valves for controlling the flow rate of a diluent and a concentrate. Various concentrates of different viscosities can be used and the selected concentrate is identified. The flow rate of the concentrate is determined b... | 07/18/2006 |
| 7073524 | Fail safe drive for control of multiple solenoid coils A fail-safe apparatus for controlling fluid flow through a series arrangement of first and second solenoid-controlled valves is provided. The fail-safe apparatus includes fail-safe circuitry for controlling the operation of the first and second solenoid-controlled v... | 07/11/2006 |
| 7069941 | Electronic faucets for long-term operation An electronic faucet (10) mounted on a countertop (12) includes a housing, at least one fluid inlet line (24a, 24b) extending into the housing, a fluid outlet (46) from the housing, a solenoid (142, 143) for op... | 07/04/2006 |
| 7051992 | Tubeless actuator with reduced secondary air gap A tubeless actuator includes a frame in which a primary plate and a secondary plate are disposed. A bobbin is disposed within the frame between the primary plate and the secondary plate. The bobbin is keyed to the secondary plate in order to maintain the alignment b... | 05/30/2006 |
| 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 |
| 7032549 | Valve lift sensor A valve lift sensor detects the position of an engine valve. The valve lift sensor includes a movable target carried on an engine valve and a stationary coil carried within an engine valve assembly. A signal generator energizes the coil with an oscillating voltage t... | 04/25/2006 |
| 7005818 | Motor actuator with torque control In a motor actuator, e.g., a valve actuator, comprising a reversible electrical motor, a drive circuit is providing a stop function, when the torque of the motor exceeds a predetermined maximum torque. The drive circuit is constructed as a two-terminal circuit conne... | 02/28/2006 |
| 6997430 | Fail safe valve The invention concerns a fail-safe valve having a valve element, and a control motor being connected with the valve element via a driveline. It is endeavored to ensure the tightness of the refrigeration system in a simple manner. For this purpose, it is ensured that... | 02/14/2006 |
| 6978978 | PWM voltage clamp for driver circuit of an electric fluid dispensing gun and method An electric fluid dispenser for dispensing a fluid onto a substrate. A power switching circuit is connected to an unregulated power supply providing a varying voltage. A solenoid connected to the power switching circuit operates a dispensing valve to move between op... | 12/27/2005 |
| 6966325 | Method for manipulating dosage control apparatus The invention is directed to a method and circuitry for controlling dosage rates of a treatment solution. An electric pulse is directed through a coil, inducing a magnetic field and causing a valve to open. A subsequent set of pulses is directed through the coil to ... | 11/22/2005 |
| 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 |
| 6932317 | Low power DC solenoid valve The present invention comprises a diaphragm type solenoid fluid valve assembly of the class used in the on/off control of pressurized fluid flow. The valve assembly has a housing, a solenoid, and a magnetized cylindrical armature engagingly coupled to the solenoid a... | 08/23/2005 |
| 6913122 | Brake for DC motor A braking device of a DC motor has a position detecting means to detect a position of a motor shaft, a rotational speed detecting means to detect a rotational speed of the motor and a braking means to generate a braking force based on a position signal and a speed s... | 07/05/2005 |
| 6854712 | Capillary valve that can be pulsed In a capillary valve, which can be pulsed and which includes a capillary with a constriction forming a nozzle, a plunger is movably disposed in the capillary and forms, together with the capillary constriction, a seal, and a drive is provided for actuating the plung... | 02/15/2005 |
| 6820856 | Manually-opened and latchable with only residual magnetism, two-way two-position fluid control valve assembly and methods of operation A disclosed is a 2-way 2-position fluid control valve assembly operable to manually open and automatically block fluid flow therethrough. The fluid control valve assembly includes a valve and an electromagnetic actuator having an armature and a pole piece. The valve... | 11/23/2004 |
| 6810841 | Electronic valve actuator control system and method A method and system for controlling a valve of an internal combustion engine. The system includes an electromagnet actuator having a coil and an armature magnetically coupled to the coil. The armature is coupled to the valve to stroke the valve between an open and c... | 11/02/2004 |
| 6789558 | Digitally controlled direct drive valve and system and method for manufacturing the same An electrical command signal to a direct drive valve is compensated by a digital signal processor to cause the output hydraulic fluid flow from the valve to conform to a desired predetermined flow. The compensation is accomplished by measuring flow from the valve us... | 09/14/2004 |
| 6786235 | Pulsed width modulation of 3-way valves for the purposes of on-line dilutions and mixing of fluids This invention relates to an apparatus comprising a switchable, 3-way valve device that delivers a constant flow rate stream of solution mixture to a chemical analysis instrument. The dilution valve is capable of mixing two input streams of solutions, at any dilutio... | 09/07/2004 |
| 6739573 | Canister purge valve noise attenuation A valve assembly and method for regulating a fluid flow and attenuating noise. The valve assembly comprises a body having a passage extending between a first port and a second port, a seat defining a portion of the passage, a member movable with respect to the seat,... | 05/25/2004 |
| 6729601 | Extended range proportional valve An extended range proportional valve which can control rates of mass flow over continuous low, intermediate and high ranges has a pilot member mounted on an armature of a solenoid which can be dithered onto and off of a pilot opening in a main valve member which sea... | 05/04/2004 |
