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| Number | Title | Issue Date |
| 7556238 | Emergency shutdown system An emergency shutdown system includes an emergency shutdown valve, a control line to carry a signal determinative of positioning of the emergency shutdown valve, a solenoid assembly coupled to the control line to effectuate the positioning of the emergency shutdown ... | 07/07/2009 |
| 7377479 | Position restoring apparatus for an open and close device A position restoring apparatus for an open and close device 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 main member with a hollow seat. The first... | 05/27/2008 |
| 7241218 | Fire/smoke damper control system A fire/smoke damper control system is provided for use in monitoring and controlling operation of one or more fire/smoke dampers in a building. The system includes a local damper controller associated with each fire/smoke damper for controlling the opening and closi... | 07/10/2007 |
| 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 |
| 7192293 | Non-reversing short tape coil device The invention provides an apparatus including a housing and a spool disposed in the housing for rotation. The apparatus also includes a wire disposed in the housing and having a first end fixedly engaged with the housing and a second end fixedly engaged with the spo... | 03/20/2007 |
| 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 |
| 7168677 | Motor-operated valve apparatus When a fluid flow channel is interrupted while an electronic circuit unit 50 including a microcomputer 51 and the like receives electric source power, a flow control valve is displaced to a predetermined position closer to a first end of both ends of a... | 01/30/2007 |
| 7073483 | Intake air quantity controlling device for internal combustion engine An intake air quantity controlling device for an internal combustion engine that includes a shaft, a throttle valve, a final spur gear, a drive motor, a full closure stopper, a full opening stopper, and a collision portion. The shaft is rotatably provided across an ... | 07/11/2006 |
| 7044439 | Motor driven value An easy-to-assemble motor-adjustable throttle valve for fluid channels, especially in motor vehicle air conditioning systems, which can be obtained when a geared motor is integrated in the setting stem without causing an unacceptable reduction of the remaining clear... | 05/16/2006 |
| 7007923 | Valve unit for controlling the delivery of a fuel gas A valve unit for controlling the delivery of a fuel gas through a delivery duct (3) comprises a valve seat (6) in the duct, a closure member (5) associated with the seat, a motor-driven actuator (7) acting on the closure member in order t... | 03/07/2006 |
| 6926252 | Drive device A drive device enabling a movable element to be driven by an actuator via a gear system comprising a motor pinion gear, an intermediate gear and a partial toothed gear. An aim of the invention is to create a particularly compact device which can capture the kinetic ... | 08/09/2005 |
| 6918574 | Reduced torque gate valve with roller screw A gate valve is disclosed which comprises a valve body which includes a flow bore that extends completely therethrough and a gate cavity that extends partially therethrough and intersects the flow bore, a bonnet which is connected to the valve body over the gate cav... | 07/19/2005 |
| 6913241 | Actuating device The present invention relates to an actuating device with an electromotive rotary drive, via which an actuating element can be driven rotatably about an axis of rotation between a first end position and a second end position and can be acted upon out of the first en... | 07/05/2005 |
| 6848474 | Control device for a flow of fluid The invention relates to a device comprising at least one safety shut-off control valve. A safety valve is optionally connected to said safety shut-off control valve, connected in series in the fluid flow path. In the safety shut-off control valve, a sealing valve i... | 02/01/2005 |
| 6745994 | Device for repositioning a rotating element A device for restoring a rotary member into a defined normal position, with a spatially stationary fixed catch, which predetermines the normal position, and a driver catch, which is coupled to the rotary member and can be moved past the fixed catch, each of which ha... | 06/08/2004 |
| 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 |
| 6575427 | Electronic throttle control mechanism with reduced friction and wear An electronic throttle control system having a housing and cover member with a throttle valve, gear mechanism, motor, and failsafe mechanism. A spring member positioned between the housing and sector gear member which is attached to the throttle valve sha... | 06/10/2003 |
| 6572076 | Valve actuator A valve actuator (1) is provided which comprises an actuator stem (4) extending from a housing (2) which contains a sleeve (17). The actuator stem (4) is driven so as to cause the sleeve to compress a stack of springs (22) within the housing until bolts (... | 06/03/2003 |
| 6572075 | Valve for controlling flow rate of gas A valve has a valve body having a passage including a hole in which gas flows. A valve disc is provided for closing the hole, and an actuator is provided for operating the valve disc. An emergency cutoff device is provided so that the valve disc closes th... | 06/03/2003 |
| 6568652 | Throttle valve restoring device In a device for restoring a throttle valve, which is for controlling combustion air of an internal combustion engine, into a definite limp-home air position, having a throttle valve shaft, which supports a drivable driver and is rotatably supported in a h... | 05/27/2003 |
| 6446519 | Electric actuator An actuator for actuating a control mechanism by axially moving an actuating member against a force comprises a housing in which a reversible drive is arranged with a first rotatable part and a second rotatable part engagable with one another and acting o... | 09/10/2002 |
| 6431317 | Rotary electric actuator with a mechanical spring return back-up A tri-modal--energy storage mode, fail-safe mode, and operating mode--fail-safe actuator with low overall power consumption and specifically low fail-safe power consumption due to energy storage pawling mechanisms. Stored energy is discharged at a control... | 08/13/2002 |
| 6375151 | Return spring mechanism for an electronic throttle control assembly A vehicle electronic throttle control assembly includes a position controlling device that automatically returns the throttle assembly components to a home position. A generally arcuate spring interacts with a plate portion supported on a shaft that is as... | 04/23/2002 |
| 6315267 | Electrically controlled servo operated engine coolant valve An engine coolant valve has a valve body with rotatable valve member thereon with a cylindrical configuration cross ported for rotary sealing against an arcuately shaped elastomeric face seal. A torque motor is attached to the valve body and has the motor... | 11/13/2001 |
| 6276664 | Worm driving a servo actuator with spring return and rotary valve employing same A motorized servo actuator has an output shaft rotated by a sector gear driven by a worm. The worm has a co-axially disposed torsion spring which is wound as the worm rotates. The worm is driven by a motor and gear train. In the event of motor failure dur... | 08/21/2001 |
| 6254058 | Spring returning a rotary valve with a differential planetary drive A rotary diverter valve assembly having a low voltage low current drive motor driving the rotating valve shaft through a differential planetary gear train. The motor drives the sun gear which engages a first pitch diameter set of teeth on the carrier moun... | 07/03/2001 |
| 6186471 | Electronic motorized zone valve An valve actuator in a hydronic heating and cooling system includes a motor for changing the position of a valve, a switch for switching power to the motor, and a sensor for detecting the arrival of the valve at a desired position and for stopping the mot... | 02/13/2001 |
| 6155533 | Default mechanism for electronic throttle control system An electronic throttle control system having a housing with a motor, throttle valve, gear mechanism, and fail-safe mechanism. A spring member attached to a gear member and default lever, and which is biased when the throttle valve is in its fully open and... | 12/05/2000 |
| 6129333 | Spring locking mechanism Apparatus for rapidly changing the state of a device from an active state to an inactive state. The apparatus includes an inner member slidably contained in an outer member. The member is connected to an actuator and the other to a control for changing th... | 10/10/2000 |
| 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 |
| 6095488 | Electronic throttle control with adjustable default mechanism An electronic throttle control system having a housing with a motor, throttle valve, gear mechanism, and fail-safe mechanism. A spring member attached to a gear member and default lever, and which is biased when the throttle valve is in its fully open and... | 08/01/2000 |
| 5988319 | Transmission for a return-to-normal actuator An apparatus for effecting actuation of a device. The device has a home position and a set position and the apparatus returns the device to the home position upon loss of power to the apparatus. In its preferred embodiment, the apparatus includes a drive ... | 11/23/1999 |
| 5984260 | Electrically driven actuator with failsafe feature A valve actuator preferably driven by an electric motor is disclosed. The valve actuator is useful with surface safety valves and uses power input from an electric motor to position the valve in its normal position. A mechanism is provided to allow the va... | 11/16/1999 |
| 5986369 | Actuator having piezoelectric braking element An electromechanical actuator maintains an external device to which the actuator is connected at an operating position when power is applied to the actuator, and allows the external device to return to a default position when the power is removed. Include... | 11/16/1999 |
| 5950765 | Two stage motorized actuator A two stage motorized servo-actuator having a worm driven high reduction gear train providing a rotary output. The motor shaft has a worm and co-axially therewith, a beveled pinion. The motor worm is continuously engaged with a first stage gear. The first... | 09/14/1999 |
| 5915668 | Fail safe valve actuator A valve actuating apparatus is provided for operating a valve between an open and closed position. The valve actuating apparatus includes an actuator having an output member with the actuator providing reciprocating motion to the output member upon energi... | 06/29/1999 |
| 5727653 | Drive device for an actuator A drive device for controlling the position of an actuator includes an electric motor for actuating the drive device. The motor is coupled to a gear mechanism and adapted to control the position of the actuator by selective operation thereof. A gear mecha... | 03/17/1998 |
| 5671903 | Heat treatment apparatus and valve device for use in the same The present invention relates to a heat treatment apparatus, specifically a valve device for use in an exhaust system of a low pressure heat treatment furnace, which comprises urging device for urging a valve body in a valve closing direction, and a drive... | 09/30/1997 |
| 5497672 | Valve actuator A valve actuator comprises a stem extending through the actuator body for coupling to a valve such that axial movement of the stem opens and closes the valve. An outer shaft is arranged coaxially around, and in threaded engagement with the stem and is cou... | 03/12/1996 |
| 5310021 | Motor-driven, spring-returned rotary actuator An electric motor acts through a gear train to rotate an output shaft in one direction while a torsion spring rotates the shaft in the opposite direction when the motor is de-energized. When the output shaft stops abruptly at a limit position after being ... | 05/10/1994 |
