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| Number | Title | Issue Date |
| 7938382 | System and method of step detection for a stepper motor A stepper motor and controller are provided for controllably adjusting the angular displacement of a rotor. The stepper motor has a plurality of stator coils that are configured to effect rotation of the rotor upon application of a voltage thereto. The stepper motor... | 05/10/2011 |
| 7325780 | Motor operated valve with reduction gear A small-sized motor operated valve is disclosed that has high output and high resolution by housing a reduction gear together with a rotor in a single can. A valve shaft 32 having a valve member 30 is inserted to a motor operated valve body 10. ... | 02/05/2008 |
| 7322560 | Coaxial valve A coaxial valve includes a valve box having an inlet opening, an outlet opening, and a common flow channel. An axially movable cylindrical valve casing has an opening for a fluid inlet port and an opening for a fluid outlet port, both of which are joined up in the f... | 01/29/2008 |
| 7308904 | Electric gear motor drive for switching valve Electric drive for a switching valve, the switching valve having such a drive, and a regenerative thermal oxidizer including the switching valve and drive system. The electric drive system allows for the starting and stopping of the rotation of a rotary valve with a... | 12/18/2007 |
| 7287595 | Electric-hydraulic power unit The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a co... | 10/30/2007 |
| 7273067 | Reduced profile electromechanical valve actuator A relatively small, lightweight valve actuator assembly that can withstand relatively high levels of vibration and shock includes a motor, a position sensor, and a drive belt mounted on an actuator housing assembly. The position sensor is preferably disposed within ... | 09/25/2007 |
| 7216625 | Throttle control devices A sensor for a throttle control device. The throttle control device includes a throttle body. A throttle valve is disposed within an intake air channel defined within the throttle body. A speed or gear reduction mechanism is coupled between a motor and the throttle ... | 05/15/2007 |
| 7210665 | Actuator integrally provided with fail-safe function An actuator includes: a rotor assembly including an output shaft having a male screw portion and having a pin attached thereto, and a sleeve having a female screw portion and threadedly engaged with the male screw portion of the output shaft so as to convert a rotar... | 05/01/2007 |
| 7182310 | Position return device for an open and close apparatus A position return device for an open and close apparatus includes a casing base, a first actuating member, a second actuating member, a first end cover, a second end cover, an output shaft and a motor. The casing base has a main member with a hollow seat at the top ... | 02/27/2007 |
| 7172169 | Actuating device An actuating device for regulating a control mechanism which is subject to a force against the direction of regulation. The actuating device includes a drive device which has a drive shaft and is connected in a moveable manner to a rotating spindle, by which means a... | 02/06/2007 |
| 7159842 | Magnetically-coupled actuating valve assembly A magnetically-coupled actuating valve assembly. The actuating valve can be used to control the action of an actuator, such as a hydraulic or pneumatic cylinder. The valve assembly is especially well-suited to use with a damping cylinder of an electronically control... | 01/09/2007 |
| 7146947 | Arrangement for adjusting the angle of rotation of a camshaft relative to a crankshaft An arrangement for adjusting the angle of rotation of a camshaft (5) relative to a crankshaft is provided. The arrangement requires many components, which partially also require different operational conditions. The new arrangement is structured in a modular ... | 12/12/2006 |
| 7137450 | Electric-hydraulic power unit The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a co... | 11/21/2006 |
| 7073772 | Motor brake structure and manufacturing method thereof Disclosed is a motor brake structure including: a rotor; a rotor axis relatively fixed to the rotor; a soft material brake having a central portion thereof into which the rotor axis is inserted, the soft material brake rotating identically with the rotor axis; and a... | 07/11/2006 |
| 7017884 | Fluid metering valve A fluid metering valve includes a gear rack which is slidable on a valve stem in which a spring counteracts the force of an actuator to maintain a constant load on the gear mechanism to prevent backlash. Corresponding stop mechanisms between the gear and the shaft o... | 03/28/2006 |
| 7007922 | Rotating regulating device The invention relates to a rotating regulating device, especially for a valve comprising a pivotable or rotatable valve body. Said device comprises at least one actuating device for rotating a regulating element which can be connected to the valve body in a moveable... | 03/07/2006 |
| 7000892 | Pneumatic servo valve The present invention relates to a pneumatic servo valve, and more particularly, to a pneumatic servo valve, wherein displacement of a spool due to flow force of a fluid is prevented by firmly holding the spool just after position control for the spool is completed,... | 02/21/2006 |
| 6998724 | Power generation system A system for generating an electrical power output from a subsea installation that includes at least one flowline, wherein the system includes a turbine that is operatively connected to the flowline, the turbine being rotatable by fluid flowing through the flowline,... | 02/14/2006 |
| 6957801 | Valve having an integrated actuator assembly A valve assembly includes a fully-integrated actuator assembly. The actuator assembly includes, within a single housing assembly, a torque source, a position sensor, a gear train, and an output shaft. The torque source is adapted to receive one or more position cont... | 10/25/2005 |
| 6925975 | Controller for controlling an electromagnetic actuator A controller for an electromagnetic actuator comprises a pair of springs acting on opposite directions, and an armature connected to the springs. The armature is held in a neutral position given by the springs when the armature is not activated. The actuator also co... | 08/09/2005 |
| 6845964 | Actuator for automotive air duct damper The present invention relates to an actuator for automotive air duct damper, and more particular to an actuator for automotive air duct damper with a new structure which allows a precise control on the flow of the air supplied in the indoor space of a car and which ... | 01/25/2005 |
| 6805227 | Electromotive servo drive An electromotive servo drive includes a drive motor having an external rotor and a drive train in driving relationship with the drive motor and having an output member operatively connected to a control element to be adjusted. A locking device having a brake element... | 10/19/2004 |
| 6763813 | Current passing device of EGR valve apparatus Particle trapping means for trapping worn particles of a commutator is provided in a power source side case mounted on a motor case of a DC motor. ... | 07/20/2004 |
| 6745997 | Method of and apparatus for operating an actuator A method of and apparatus for operating an actuator which is used to open and close valves in pipelines in order to avoid pressure surges and resonances during the closing operation in pipelines to be shut off. The closing operation of the valve is subdivided into t... | 06/08/2004 |
| 6681797 | Pressure transducer A pressure transducer for the production of a controlled under or overpressure comprises a valve to which compressed air can be applied, a motor for adjusting the position of the valve block, a sensor for measuring the pressure to be controlled and an ele... | 01/27/2004 |
| 6651952 | Two position rotary actuator incorporating DC solenoid A method and apparatus for controlling a ventilation damper unit utilizing a direct coupled two-position rotary damper actuator with a DC solenoid is disclosed. The actuator acts to rotate the output coupling, and in turn, the damper shaft to open the dam... | 11/25/2003 |
| 6644621 | Anti-lock brake system solenoid valve The present invention relates to an ABS solenoid valve. The ABS solenoid valve comprises: a housing coupled within a modulator block; a receiving unit disposed within the housing; a plunger mounted on the receiving unit and having a projection in one end;... | 11/11/2003 |
| 6585228 | Electric valve actuator with eddy current clutch An electrically operated valve actuator with an eddy current clutch is disclosed. The use of the eddy current clutch provides an actuator that can control the rate of closing of the valve in a predetermined linear manner to avoid slamming the valve shut i... | 07/01/2003 |
| 6488260 | Electric fail safe valve actuator A fail safe valve actuator is disclosed that is powered by an electric motor which drives through a wrap spring clutch and a centrifugal brake configured to absorb a portion of the energy released when the power fails and the valve stem is moved rapidly t... | 12/03/2002 |
| 6357425 | Current-carrying device for EGR valve device A power supply motor brushes 25 for a current carrying device is arranged in a sensor power supplying unit 21 with a sensor. This allows connecting terminals 5 of the sensor power supplying unit 1 and receiving connectors 7 of a DC motor unit 6, which are... | 03/19/2002 |
| 6224034 | Control valve device An elastic body 51 is provided to absorb impact energy generated by the collision between rotor positioning portions 31 and shaft portion positioning portions 29 when a shaft portion 24 is moved into a female thread portion 26 to determine the initial pos... | 05/01/2001 |
| 6224348 | Device and method for controlling displacement of variable displacement compressor A variable displacement compressor includes a swash plate and a displacement control valve. The swash plate is moved between a maximum inclination position and a minimum inclination position in accordance with the pressure in a crank chamber. The control ... | 05/01/2001 |
| 6192931 | Damper blade control A device for controlling the movement of a damper mounted in a housing includes a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is mounted on the shaft for rotation therewith and ... | 02/27/2001 |
| 6186162 | Leak detection and shut-off apparatus A water shut-off system incorporates a water shut-off valve utilizing a pair of adjacently disposed electrodes, a transmitter and a receiving means. The water shut-off valve is in the form of a ball valve. A timing logic causes current to flow to a valve ... | 02/13/2001 |
| 6184604 | Brake mechanism and powered actuator A brake mechanism includes a reduction gear train, a motor structure, and a braking means. The reduction gear train transmits at least a rotation force in a first rotational direction supplied from a drive source. The reduction gear train is imparted with... | 02/06/2001 |
| 6102016 | EGR system and improved actuator therefor An exhaust gas recirculation system (11) for an internal combustion engine, including a valve (25) having a closed position (FIG. 2) blocking flow of exhaust gas, the valve being biased by gas pressure in the exhaust gas passage (E) toward a closed positi... | 08/15/2000 |
| 6097123 | Brake and stall detector for a motorized actuator An actuator for an HVAC system includes a motor coupled by an electrically operated clutch to a gear train which drives an output connector. A spring is connected to the transmission to drive the output connector to a normal position in the event of a pow... | 08/01/2000 |
| 6021955 | Method and apparatus for controlling the speed of a damper blade A device for controlling the movement of a damper mounted in a housing between an open position and a closed position comprises a shaft rotatably secured to the damper for pivoting the damper between an open position and a closed position. A lever arm is ... | 02/08/2000 |
| 5983743 | Actuator assembly An actuator assembly for moving a device between a retracted and extended position in which a ball screw is connected to the device and is in threaded engagement with a ball nut so that, upon rotation of the ball nut, the ball screw moves between a retrac... | 11/16/1999 |
| 5937835 | EGR system and improved actuator therefor An exhaust gas recirculation (EGR) system (11), especially for a diesel engine, having a valve (25), including a valve stem (29,31) and an actuator operable to move the valve (25) between the open (FIG. 1) and closed positions. The actuator includes an el... | 08/17/1999 |
