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| Number | Title | Issue Date |
| 7602129 | Rotary-motor-loaded device and control characteristic measurement method and program A motor drive control unit includes a chip in which everything about a control system is provided and controls a spindle motor which rotates magnetic disks at a constant speed. When a measurement instruction is received from a disturbance generating unit and the upp... | 10/13/2009 |
| 7305757 | Die ejector system using linear motor A die ejector system and method for removing a die from an adhesive surface. The system includes an ejector tool that is operative to move relative to the die whereby to push the die. The ejector tool may consist of a collet holder and an ejector pin array. A shaft ... | 12/11/2007 |
| 7268504 | Stator position feedback controller Stator position feedback controller. A first position monitoring device responds to the position of a stator supported for relative motion by a machine base. A second position monitoring device responds to the position of a carriage with respect to the machine base.... | 09/11/2007 |
| 7259492 | Rotor axial activation modulation of electric machinery due to reverse torque The invention involves installation of a helical nut structure, or a helical nut and ball or roller bearing structure, between an electric machinery transmission shaft and a driven transmission element. Depending on the torque between the electric machinery rotor, a... | 08/21/2007 |
| 7218018 | Actuator An actuator includes a casing, a stationary member having a coil member and mounted in the casing and a movable member having a moving element and supported by the casing. The moving element has a shaft and is supported by the casing so as to be moved in an axial di... | 05/15/2007 |
| 7116030 | High-speed synchronous motor An electric motor for operation at very high speeds comprises a ferromagnetic stator (11), a ferromagnetic rotor (13) having a rotor core (16) with a plurality of reluctance poles (17) spaced from the stator by an air gap (G), and a rotor... | 10/03/2006 |
| 6543355 | Roller for a rotary press A roller or a cylinder that is useable in a rotary printing press can accomplish both circumferential as well as axial movement. At least one component of an electric motor can accomplish both the axial and the circumferential movement of the roller. This... | 04/08/2003 |
| 6498445 | Oscillation apparatus for oscillating roller An oscillation apparatus includes an oscillation mechanism for reciprocating an oscillating roller which can be rotated in the circumferential direction and can be reciprocated along the axial direction; an oscillation-width adjustment mechanism for adjus... | 12/24/2002 |
| 6429611 | Rotary and linear motor A rotary and linear motor having a rotor, a casing and a plurality of stator coils mounted to the interior of the casing spaced from the rotor and radially spaced apart around the rotor. A rotary and linear motor control circuit is operative to receive in... | 08/06/2002 |
| 6384549 | Rotating electric motor system capable of vibrating and method for operating a rotating electric motor capable of vibrating The invention concerns a rotating electric motor system capable of vibrating and a method for operating a rotary electric motor capable of vibrating. The system comprises an electric motor having a rotor and a stator, the rotor and the stator forming a un... | 05/07/2002 |
| 6331687 | Control method and device for a switchgear actuator A current interrupter (4) includes a current interrupting device (4) having at least one movable contact (71); an actuator (8) coupled to the movable contact (71) of the current interrupter (4); a feedback sensor (14) for monitoring movement of the actuat... | 12/18/2001 |
| 6265839 | Hoist transfer drive system having X and Y-linear motors A drive system for transferring a work load suspended from a hoist from one work processing stage to another in a series of stages. Included in the system is an X-linear motor which causes the hoist to travel along a horizontal path running from stage to ... | 07/24/2001 |
| 6091167 | Double coil actuator An electric voice coil actuator includes two coils slidingly mounted on a ferromagnetic housing. The coils, which are connected to each other in most applications, are mounted co-axially for linear reciprocal movement in respective magnetic fields. The no... | 07/18/2000 |
| 6016039 | Control processes for linear voice coil actuator A controller for a voice coil actuator includes sensors that are connected with the actuator probe to monitor both the linear and angular position of the probe, as well as the axial and rotational forces on the probe. Using predetermined instructions, the... | 01/18/2000 |
| 5959374 | Electromagnetic actuator An electromagnetic actuator includes an actuator rod having a plurality of magnetic assemblies disposed about a longitudinal axis of the actuator rod. Each plurality of magnetic assemblies develops alternating magnetic flux along the longitudinal axis. Th... | 09/28/1999 |
| 5844335 | Electric motor A light-weight and small-size electric motor in which linear movement can be obtained without requiring any special movement conversion mechanism. The electric motor includes a rotor (4), a rotary shaft (5, 6, 5a) coupled to the rotor (4), and a screw mec... | 12/01/1998 |
| 5693989 | Linear pulse motor A linear pulse motor includes a stator core manufactured easily and windings for phases disposed in the circumferential direction of the stator core and the length thereof is not lengthened in the shaft direction even when a multi-phase linear pulse motor... | 12/02/1997 |
| 5679988 | Rocking motor A rocking motor comprises a coil wound around a hollow coil bobbin. A rotor is rotatably mounted at a position close to an end portion of the coil bobbin. The rotor has a center shaft and a permanent magnet and is magnetized with two poles such that the p... | 10/21/1997 |
| 5627418 | Combined linear-rotary stepping motor A combined linear-rotary stepping motor shares stator iron plates and mover iron cores for a linear motor portion and a rotary motor portion without lengthening the length in the shaft direction. The combined linear-rotary stepping motor includes a stator 1 ha... | 05/06/1997 |
| 5600189 | Electromagnetic actuator having a cylindrical translation coil and a toroidal rotation coil, actuator unit comprising the actuator and a measurement system, and machine comprising the actuator or the actuator unit An electromagnetic actuator (1) comprises two actuator sections which are translatable relative to one another along an actuator axis (1a) and which are rotatable about the actuator axis, a first actuator section (1) comprising a coil system and a second ... | 02/04/1997 |
| 5446323 | Actuator with translational and rotational control An apparatus for precisely moving and positioning a manufacturing component includes a housing on which a magnet is mounted. An electrical coil is wound around a coil piston which is slidingly mounted on the housing for movement within the magnetic field ... | 08/29/1995 |
| 5376871 | Method of controlling position of rotary shaft in magnetic bearing In a magnetic bearing carrying a rotary shaft in the air, the rotary shaft is required to rotate substantially at the same position. In controlling the position of the rotary shaft, a first exciting current If is supplied to a plurality of firs... | 12/27/1994 |
| 5315189 | Actuator with translational and rotational control An actuator for precisely moving and positioning a manufacturing component includes a housing on which a magnet is mounted. An electrical coil is wound around a coil piston which is slidingly mounted on the housing for movement within the magnetic field g... | 05/24/1994 |
| 5229696 | Servomechanism In a servomechanism, the stator and the rotor each have disk-shaped iron parts between which a disk-ring-shaped axial air gap is formed. The stator and rotor windings are fashioned as spiral-shaped conductor paths/interconnects on insulating layers which ... | 07/20/1993 |
| 5159253 | Control device for a vibration wave motor The present invention relates to a vibration wave motor of the type in which an electro-mechanical energy conversion element is disposed on a vibration member and a frequency voltage is applied to the element to form a travelling vibration wave on the vib... | 10/27/1992 |
| 5093596 | Combined linear-rotary direct drive step motor A combined linear-rotary direct drive step motor, having a rotary section and a linear section in a single housing, comprising a cylindrically shaped variable reluctance linear step motor; a modified hybrid permanent-magnet rotary step motor; and a common... | 03/03/1992 |
| 5051635 | Ball-splined shaft assembly A ball-splined shaft assembly suitable for use in a robot arm or the like is provided. The assembly includes a shaft formed with a plurality of circumferential grooves spaced apart from one another at a predetermined pitch and a pair of longitudinal groov... | 09/24/1991 |
| 4908558 | Spherical motion simulator A flight motion simulator includes a unit under test supported on a stationary frame for angular and translational movement along pitch, roll, and yaw axes. A rotor element is secured to the unit under test and has a spherical configuration. Magnetic bear... | 03/13/1990 |
| 4747668 | Optical scanning unit An optical scanning unit with an objective for focussing a beam into a scanning spot on the surface of an information carrier and an electromagnetic drive for continuous correction of the position of the objective with respect to the information carrier. ... | 05/31/1988 |
| 4739241 | Spherical motor particularly adapted for robotics A spherical motor particularly adapted for robotic control. The motor comprises a stator housing defining a semispherical socket having an opening of generally polar cap form with a spherical rotor rotatably received in the socket for rotation therein abo... | 04/19/1988 |
| 4715523 | Electromagnetic power drive for a friction welding machine An electromagnetic power drive for a friction welding machine, comprising a magnetic core installed immovably, which carries a power coil connected to a voltage regulator made as a switch and at least one pickup coil connected to an integrator producing v... | 12/29/1987 |
| 4707642 | Actuating device An actuating device comprises a three-dimensionally movable member, a support member for supporting the movable member and an induction unit for imparting an induction force to at least one of the movable member and the support member to three-dimensional... | 11/17/1987 |
| 4620301 | Recording disk drive unit A turntable for placing a recording disk such as an optical information storage disk has a rotatable shaft to which an electrically conductive rotor is fixed. Inner and outer stators are disposed in confronting relation to each other with the rotor interp... | 10/28/1986 |
| 4602848 | Optical apparatus with 5-degree of-freedom positioning device A positioning device for positioning an element, such as an optical element used to direct a radiation beam with respect to tracks on a carrier, with respect to translation along three mutually perpendicular axes and pivoting about two of those axes. Two ... | 07/29/1986 |
| 4587466 | Two axis linear motor for optical focusing and tracking system in optical recording A two axis linear motor for carrying the objective lens for optical focusing and optical tracking in an optical recording system has a stationary structure for providing a magnetic field and a moving armature structure. The stationary structure may have t... | 05/06/1986 |
| 4443743 | Two axis actuator A multiaxis actuator is described which provides force along at least two translational axes through the interaction of multiple windings on a single platen which interact with the field poles of a magnetic member spaced apart a sufficient distance to all... | 04/17/1984 |
| 4421997 | Multiple axis actuator A multi-axis actuator which provides force along three translational and two rotational axes through the interaction of multiple windings on a single platen which interact with the poles of a magnetic member spaced apart a sufficient distance to allow lin... | 12/20/1983 |
| 4286181 | Stepping motor for rotary device A stepping motor mechanism for a rotary device in which one member is indexed linearly and/or rotationally relative to a second rotating member. The indexing member includes at least one portion with a series of equi-distantly spaced ridges and the rotati... | 08/25/1981 |
| 4286197 | Two-coordinate positioning device A positioning device with two coordinates, for the moving of two components relative to each other. The positioning device with two coordinates serves for the exact positioning of a tool or workpiece, preferably of semi-conductor discs, for the purpose of... | 08/25/1981 |
| 4281263 | Hybrid stator and a two-axis induction electric motor constructed therewith A tubular stator capable of creating a magnetic field having both linear and rotary components comprises a tubular magnetic frame formed from longitudinal magnetic elements which are angularly spaced. The magnetic elements have teeth which extend radially... | 07/28/1981 |
