Class 318/48 - Mechanically coupled in torque opposition

Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter in which one or more of the motors are connected
No. of patents: 22
Last issue date: 09/21/2010

Number	Title	Issue Date
7800320	Power transmission device, and display device and display panel pedestal that have the power transmission device A power transmission device capable of adjusting a torque to be applied to an output shaft easily and removing a backlash between gears exactly, and a display device and a display panel pedestal that have the power transmission device. A power transmission device	09/21/2010
7336012	Motor, robot, substrate loader, and exposure apparatus An apparatus that reduces vibration generation and magnetic leakage, wherein the apparatus is a motor, an articulated serial robot that has a motor built in, a substrate loader that includes the articulated robot, and a related exposure apparatus equipped with the s...	02/26/2008
7152503	Device for compensating a torque produced by a gyrostatic effect A device for compensating a torque produced on a movable axle in a machine tool or production machine by a gyrostatic effect includes a rotating useful machine system attached to the movable axle and producing a useful angular momentum, and a rotating machine counte...	12/26/2006
6633143	Reactionless rotary drive mechanism An articulating probe head includes motors 12 and 18 for driving respective output shafts 14 and 20 about respective orthogonal axes z and x to move a stylus 22 over the surface of a workpiece under the control of a controller 26. At least one of the moto...	10/14/2003
6580244	Active damping and backlash control for servo systems Two motors are used to provide motion control in a transport drive system. A primary motor, or a primary and secondary motor, provides primary power for accelerated motion. PWM signals are used to drive the motors according to predetermined fixed function...	06/17/2003
6349606	Reduced backlash translating system Apparatus embodying the invention includes first and second motors coupled to a carriage assembly for moving the carriage assembly back and forth between first and second end points. The first motor is for developing a force to drive the carriage in one d...	02/26/2002
5804934	Power output apparatus and method of controlling the same A power output apparatus (20) of the present invention includes a clutch motor (30), an assist motor (40), and a controller (80) for controlling the clutch motor (30) and the assist motor (40). The clutch motor (30) includes an outer rotor (32) linked wit...	09/08/1998
5729100	Method and apparatus for controlling backlash in motor drive systems An anti-backlash gearing system which includes first and second drive gears hich mesh with a driven gear to provide torque and rotational motion to the driven gear. The drive gears are each driven by a motor, while the driven gear drives a load. The anti-b...	03/17/1998
5704250	Ball screw drive with dynamically adjustable preload A threaded ball screw is stationarily non-rotatably mounted in a machine tool to extend parallel to the line of action traversed by a carriage. A pair of threaded ball nuts are laterally restrained in and mounted for free rotation thereof in a drive mecha...	01/06/1998
5625262	System for equalizing the load of a plurality of motors A system having two or more A.C. motors driving the same load. The stator windings and rotors of both motors each conduct current having a vector representative of a magnitude and angular position of the current in the respective rotor and stator winding....	04/29/1997
5311091	Low stiction dual drive, motive system A dual drive motive system used to control the movement or position of another system or structure in a first and second embodiment has two motors, two frame members and a ring moveably mounted between the frame members by means of suitable bearings. One ...	05/10/1994
5047703	Motor driving device The present invention relates to a motor driving device wherein two motors are held in engagement with an identical spindle through respective torque transmission mechanisms, and wherein each of the motors has a driving amplifier for generating a torque i...	09/10/1991
4638221	Reaction force compensator Reaction force compensation means 70 (FIG. 1) for countering the reaction torque of a heavy body, such as rotatable yoke assembly 20, when accelerated relative to flimsily supported body 21 about axis 22, comprises a reaction member 71 rotatable about the...	01/20/1987
4594652	Digital audio differential drive system A motion control drive system for producing and controlling programmed and remote controlled machine operations by directing and controlling the performance of a rotating output shaft. The output shaft is then used to provide drive power and programmed co...	06/10/1986
4591772	Load positioning system with gravity compensation A load positioning system with gravity compensation has a servo-motor (12), position sensing feedback potentiometer (38) and velocity sensing tachometer (42) in a conventional closed-loop servo arrangement to cause lead screw (14) and ball nut (20) to ver...	05/27/1986
4375047	Torque compensated electrical motor An electric motor having a cage pivotally mounted at one end to a post interior a housing by a first bearing and at its other end by a second bearing between the exterior of the cage and the interior of the housing. A first stator is mounted to the interi...	02/22/1983
4373147	Torque compensated electric motor An electric motor having a first rotor on an output shaft, a first stator pivotally mounted to a housing, a second rotor mounted to the first stator and a second stator mounted to the housing. The second stator is driven with a control signal which is a f...	02/08/1983
4323828	Apparatus for use with a motor drive An apparatus is provided for use with a motor drive for cancelling the electromagnetic reaction energies developed by a pair of drive motors upon rapid starting or sudden stopping, the latter occurring upon the application of dynamic braking to said motor...	04/06/1982
4225290	Pumping system An improved chromatographic pump control circuit for compensating for pulsation in pump flow over a wide range of flow-rates and pressures and for providing improved protection against pump pressure and motor torque fault conditions. The control circuit i...	09/30/1980
4219764	Apparatus for use with a motor drive An apparatus is provided for use with a motor drive for cancelling a reaction energy of a drive motor upon rapid starting or sudden stop. The apparatus comprises a revolving member adapted to be operatively connected with the rotor of the drive motor. The...	08/26/1980
4126818	Hybrid stepping motor unit A hybrid stepping motor unit includes a stepper-type primary motor and a secondary motor. The rotor shafts of the stepper-type primary motor and the secondary motor are connected to a common output shaft. The stepper-type primary motor is energized in res...	11/21/1978
3952235	Control system for electrodynamic mechanism There is disclosed an electric system for controlling the direction of rotation of two counter rotating motors operated from a source of A.C. line voltage, the system comprising a selecting circuit operated by a rectifier connected to the source and conta...	04/20/1976

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Class 318/48 - Mechanically coupled in torque opposition