Swash Plate Patents (Class 310/82)
  • Patent number: 10274102
    Abstract: A valve actuator for a valve has an electric motor which comprises a rotor and a stator, and further a magnetic detent brake with at least one detent magnet for holding the rotor in a detent position. The least one rotor magnet is arranged on the rotor and co-operates with the detent brake.
    Type: Grant
    Filed: June 25, 2015
    Date of Patent: April 30, 2019
    Assignee: Buerkert Werke GmbH
    Inventor: Klaus Beck
  • Patent number: 9863238
    Abstract: A submersible electrical machine includes a first magnetic package spaced axially from a second magnetic package, a first stator displaced axially from the first magnetic package by a first air gap, a second stator displaced axially from the second magnetic package by a second air gap. The electrical machine can be operated as a generator or as a motor. When operating as a generator, a turbine can rotate the magnetic packages relative to the stators in response to fluid flowing axially across the electrical machine.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 9, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Jerome Miles, Scott Dahlgren, Craig Boswell, Scott Wolston, Jacques Orban, Daniel Madsen
  • Patent number: 9469334
    Abstract: Disclosed are a reducer and an electric power steering apparatus having the same. According to the present invention, an input shaft, a driving shaft, and a pinion shaft are coaxially arranged. Thus, a conventional configuration, in which a motor inevitably protrudes, can be improved to prevent the motor from interfering with the other structures. Therefore, a layout configuration in an apparatus can be compactly formed.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: October 18, 2016
    Assignee: MANDO CORPORATION
    Inventors: Kyung Min Ko, Jung Sik Park, Seong Ho Choi
  • Patent number: 9281736
    Abstract: A virtual ellipse electric motor and methods are presented. A fulcrum bears a nutating dynamic load, and a wobble plate is rotationally coupled to the fulcrum and nutates around the fulcrum. The wobble plate includes an inner pericyclic gear and an outer pericyclic gear, and a stationary gear meshes with the outer pericyclic gear and provides leverage to the wobble plate. The rotational output plate meshes with the inner pericyclic gear and rotates in response to rotation of the wobble plate. The stator includes an electromagnet and electromagnetically attracts a first side of the wobble plate such that a second side of the wobble plate is leveraged against the stationary gear and the rotational output plate.
    Type: Grant
    Filed: March 23, 2013
    Date of Patent: March 8, 2016
    Assignee: The Boeing Company
    Inventors: Robert J. Atmur, William P. Sargent
  • Patent number: 9184641
    Abstract: An eccentrically rotating apparatus has a rotating table 5, a bearing board 4 and a support board 2 spaced apart from each other in a vertical direction and having a common axis C arranged on a base plate 1. The rotating table 5 has a support pole 6 and a weight 7. The support board 2 has a support tip 2a connected to the bearing board 4 with a predetermined space apart and movably arranged on the base plate 1. The apparatus includes a sensor 11 for detecting a position of the weight 7 and a driving unit 9 activated by detected signals from the sensor 11. The rotating table 5 is eccentrically rotated such that the driving unit 9 pushes up the support board 2 at a time when the sensor 11 detects the weight 7.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: November 10, 2015
    Assignee: Tsugane Machine Company Limited
    Inventor: Sachio Tsugane
  • Patent number: 9024505
    Abstract: A swashplate system includes a rotating outer ring and a non-rotating inner ring, the rotating outer ring being adapted to carry a coil of wire and the non-rotating inner ring being adapted to carry a first and a second magnet. The first and second magnets create a magnetic field and an electrical current is created as the coil of wire passes through the magnetic field as the rotating outer ring rotates.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: May 5, 2015
    Assignee: Textron Innovations Inc.
    Inventors: Jordan Doyle, James Mast, Cristos Bias
  • Patent number: 8704413
    Abstract: An electromagnetic step-by-step wobbling micromotor comprises an inner component and an annular component being external to the inner one. The outer component may be a stator and the inner component a rotor, or vice versa. The inner component has three or more poles with a winding on each pole, and an external surface facing an internal surface of the outer component. During the operation of the micromotor each winding is powered. The external and internal surfaces have toothed surfaces. Each tooth has a peak radius which is different from the valley radius.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: April 22, 2014
    Assignee: Scuola Superiore di Studi Universitari e di Perfezionamento Sant'Anna
    Inventors: Cesare Stefanini, Paolo Dario, Maria Chiara Carrozza, Sarah De Cristofaro
  • Patent number: 8598754
    Abstract: The invention relates to a rotary electric machine with an eccentric rotor that comprises a stator and an eccentric rotor, the stator including a plurality of magnetic poles circumferentially distributed in order to define a closed cylindrical space, the rotor having a generally cylindrical shape with a diameter lower than that of said closed space and including a plurality of magnetic poles circumferentially distributed, the rotor rotating inside the closed space, wherein the machine further includes a shaft depending on the rotational component of the rotor, said machine being characterized in that, at the area of electromagnetic interaction between the stator and the rotor, the evolute of a stator pole and the evolute of a rotor pole have substantially equal lengths.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: December 3, 2013
    Assignee: Delachaux S.A.
    Inventor: Gilles Lacour
  • Patent number: 8358042
    Abstract: The present invention provides a small-size light-weight electric motor integrated hydraulic motor which is simple in configuration, integrally includes an electric motor and a hydraulic motor, and is capable of efficiently operating, by being configured such that: a swash plate type hydraulic motor and an electric motor driven by the swash plate type hydraulic motor are provided in one casing; the casing is filled with oil; a driving shaft of the swash plate type hydraulic motor is configured to extend from a front end portion of the casing up to a rear end portion thereof and be supported at the front and rear end portions of the casing; the swash plate type hydraulic motor and a rotor of the electric motor are provided in series at the driving shaft; and a stator of the electric motor is fixed to an inner side portion of the casing.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: January 22, 2013
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Masahiro Yamada, Ryo Yamamoto
  • Publication number: 20080197732
    Abstract: An adjustable bent housing comprises a stator connector, an adjustable housing having a first axial deviation and a first offset point and a plurality of spaced teeth, a crown which is disposed between the stator connector and the adjustable housing, and has a plurality of spaced teeth which are complementary to the adjustable housing teeth, means for rotatably engaging the crown to the stator connector and a slotted mandrel disposed within the crown and having a threaded connection to the stator connector at one end, and a threaded connection to the adjustable housing at the other end. The slotted mandrel has a second axial deviation and a second offset point The first offset point and the second offset point are aligned when the adjustable bent housing is assembled, creating a single offset point.
    Type: Application
    Filed: February 16, 2007
    Publication date: August 21, 2008
    Inventor: Nicu CIOCEANU
  • Patent number: 6710483
    Abstract: A revolution type actuator having a movable member performing a revolution motion includes a movable member capable of revolving with respect to a fixed member, a plurality of conducting paths which are provided on a face parallel to a trajectory face of the above-mentioned revolution motion and through which currents flow in mutually intersecting directions, power supply which flows currents having different phases through the above-mentioned plurality of conducting paths, and a magnetic field generator which forms a magnetic field perpendicular to the above-mentioned conducting path, in which the above-mentioned movable member revolves due to an electromagnetic force generated by an interaction between a current flowing through said conducting path and a magnetic field generated by the above-mentioned magnetic field generator.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: March 23, 2004
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Tomohiro Ota, Katsuhiro Hirata, Hitoshi Kitano, Yoshikazu Shikata
  • Patent number: 6664711
    Abstract: A harmonic motor includes a first annular member, a second member, and device for flexing the first annular member. The first annular member has a longitudinal axis and is flexible. The second member is substantially coaxially aligned with the first annular member. One of the first annular and second members is rotatable about the longitudinal axis, and the other of the first annular and second members is nonrotatable about the longitudinal axis. The flexing device flexes the first annular member into at least two spaced-apart points of contact with the second member and sequentially flexes the first annular member to rotate the at least two points of contact about the longitudinal axis which rotates the rotatable one of the first annular and second members about the longitudinal axis. The flexing device is nonrotatable about the longitudinal axis.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: December 16, 2003
    Assignee: Delphi Technologies, Inc.
    Inventor: Thomas A. Baudendistel
  • Patent number: 6661139
    Abstract: A motor-gear unit, having an eccentric wheel gear, driven by a rotary drive (3), which eccentric wheel gear has an eccentric element (8), an eccentric wheel (10) rotatably supported on the eccentric element, and a driver (15), and the driver (15) cooperates with the eccentric wheel (10) by intermittent meshing, further having at least one guide bolt (22), which cooperates with the eccentric wheel (10) and both assures the eccentric motion of the eccentric wheel (10) and prevents an undesired rotation of the eccentric wheel 10. It is proposed that the eccentric wheel gear is disposed in a free installation space of the rotary drive (3).
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: December 9, 2003
    Assignee: Robert Bosch GmbH
    Inventor: Frank Moskob
  • Patent number: 6570275
    Abstract: A motor having two degrees of free motion includes: a motor casing; a combined core of cylindrical shape having a plurality of inner teeth inside and a plurality of outer teeth outside and fixedly coupled inside the motor casing; a first coil winding wound on the inner teeth of the combined core; a second coil winding coil wound on the outer teeth of the combined core; a rotating armature having a permanent magnet inside inserted inside the combined core and rotated by an interaction of a magnetic flux formed by the first coil winding and the permanent magnet; a linear armature located at one side of the second coil winding undergoing a linear movement by the flux formed by the second coil winding; a driving shaft penetratingly coupled to the rotating armature and to the linear armature and undergoing rotating and linear movements therewith; and a spring urging the linear armature away from the combined core.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: May 27, 2003
    Assignee: LG Electronics Inc.
    Inventors: Tae Heoung Kim, Jin Soo Park
  • Patent number: 6548926
    Abstract: The subject of the invention is a linear displacement actuator which includes a male part and a female part. One part includes a screw thread and the other part includes at least one peripheral rib which collaborates with the screw thread. The inside diameter of the female part, increased by the depth of the screw thread, is greater than the outside diameter of the male part. The female part bears linear actuators arranged at right angles in a support and is free to be displaced axially with respect to the male part. The linear actuators place the female part in sinusoidal vibration in two perpendicular directions with an appropriate phase shift between the vibrations, and displaces, rotation-wise, the line of contact between the screw thread and the at least one peripheral rib. The screw thread and the peripheral rib remain motionless in terms of rotation and therefore bring about relative linear displacement of the female part and of the male part.
    Type: Grant
    Filed: February 23, 2001
    Date of Patent: April 15, 2003
    Assignee: Meritor Light Vehicle Systems-France
    Inventor: Simon Blair Dobson
  • Patent number: 6548927
    Abstract: A stator (2) is fixed to a casing (1). Bearing supports (5, 6) are fixed to the casing (1), and a rotary shaft (4) is rotatably supported by the bearing supports (5, 6) through bearings (7, 8). A rotor (3) is fixed to the rotary shaft (4), and an orbiting shaft (9) is supported eccentrically and rotatably by the rotary shaft (4) through bearings (10, 11). An upper end of the orbiting shaft (9) is protruded out of the casing (1). An orbiting plate (12) is fixed to the lower section of the orbiting shaft (9), and an Oldham's ring (13) having protrusions (14, 15) is provided between the bearing support (6) and the orbiting plate (12). Grooves (16, 17) orthogonal to each other are provided in the bearing support (6) and the orbiting plate (12), respectively, and the grooves (16, 17) are engaged with the protrusions (14, 15).
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: April 15, 2003
    Assignee: A & A Corporation
    Inventors: Mineo Takahashi, Naotake Yoneda
  • Patent number: 6369477
    Abstract: A roller-type electric motor includes a housing having a hollow interior and an inner wall. A plurality of stator poles each of predetermined magnetic polarity are positioned at the inner wall of the housing, and a roller having an outer surface is positioned for rolling movement within said hollow interior of the housing. A plurality of roller poles each of predetermined magnetic polarity are positioned on the outer surface of the roller so that a first one of the roller poles has a magnetic polarity opposite the magnetic polarity of a first one of the stator poles so that the first roller pole is drawn through magnetic action into contact with the first stator pole.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: April 9, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Richard L. Bonin
  • Patent number: 6326714
    Abstract: The present invention provides an improvement in a two-axis pointing motor (20) having a frame (21) and an armature (22). The armature has an axis (x-x) passing through a point (P). The armature is mounted on the frame for controlled omni-directional pivotal movement of the axis about the point. The motor has a permanent magnet (24) mounted on the armature, and has a plurality of coils (25,25,25,25) mounted on the frame for creating controllable electromagnetic fluxes for urging the armature to pivot about the point. In one aspect, the improvement comprises the coils being positioned such that the entire volume of each of the coils is entirely within an imaginary hemisphere (h) generated about the point. This hemisphere is of arbitrary radius, but encompasses the coils. In another aspect, the improvement comprises the armature having a magnetically-conductive surface (33) which is configured as a segment of a sphere.
    Type: Grant
    Filed: October 27, 1999
    Date of Patent: December 4, 2001
    Assignee: Moog Inc.
    Inventor: Pablo Bandera
  • Publication number: 20010017497
    Abstract: The subject of the invention is a linear displacement actuator which includes a male part and a female part. One part includes a screw thread and the other part includes at least one peripheral rib which collaborates with the screw thread. The inside diameter of the female part, increased by the depth of the screw thread, is greater than the outside diameter of the male part. The female part bears linear actuators arranged at right angles in a support and is free to be displaced axially with respect to the male part. The linear actuators place the female part in sinusoidal vibration in two perpendicular directions with an appropriate phase shift between the vibrations, and displaces, rotation-wise, the line of contact between the screw thread and the at least one peripheral rib. The screw thread and the peripheral rib remain motionless in terms of rotation and therefore bring about relative linear displacement of the female part and of the male part.
    Type: Application
    Filed: February 23, 2001
    Publication date: August 30, 2001
    Inventor: Simon Blair Dobson
  • Patent number: 5892310
    Abstract: A torquer assembly is to exert torques about two mutually orthogonal axes on a platform which is mounted for universal movement about a central swivelling point. To this end, a stator having four pairs of pole pieces is provided. The pole pieces are angularly spaced by 90.degree. about an axis passing through the swivelling point. The pole pieces of each pair define an air gap therebetween. The air gap is limited by spherical surfaces. The spherical surfaces are curved about the swivelling point. Permanent magnets together with the pole pieces and magnetic return loops form magnetic circuits, a magnetic field being generated in the air gaps. An armature with four elongated, arcuate coils angularly offset with respect to each other by 90.degree. is connected with the platform. The coils have circumferentially extending turns. Each of these coils extends, with an arcuate coil section, into the air gap of a respective one of the pairs of pole pieces.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: April 6, 1999
    Assignee: Bodenseewerk Geratetechnik GmbH
    Inventor: Hagen Kempas
  • Patent number: 5854528
    Abstract: An ultrasonic motor has a vibrating body 3 and a moving body 11 supported by a supporting component 7. A rounded lower end of the supporting component is supported in a tapered dent of a supporting base 10, and therefore when a side pressure is applied, it inclines to the supporting base so as to keep the contact between the vibrating body and moving body stable. As a result, a stable motor rotation is always obtained regardless of side pressure. A lead wire 8 is held between a metal elastic element 1 and supporting component, and is pressed against the elastic element. Hence, the lead wire, through contact with the elastic element, is electrically coupled to the common electrode on the upper surface of a piezoelectric element without soldering and without use of conductive resin.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: December 29, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takahiro Nishikura, Masanori Sumihara, Takashi Nojima, Osamu Kawasaki
  • Patent number: 5804898
    Abstract: An electric motor is capable of increased output torque by utilizing both electric energy by an electromagnet and a magnetic energy by a permanent magnet. The electric motor includes a wobble rotor made of a magnetic material including at least one permanent magnet arranged annularly in a circumferential direction therein. A plurality of electromagnets are disposed annularly along with the outer periphery of the rotor. Current switching circuitry energizes the electromagnets in a predetermined sequence and timing. The wobble rotor is supported by a supporting mechanism around a center portion thereof in a pivotally movable manner and is capable of closely approaching or contacting an energized electromagnet at the outer periphery thereof and of wobbling movement with a certain incline toward the energized electromagnet according to the predetermined sequence and timing of the energizing of the electromagnets.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: September 8, 1998
    Assignee: Nihon Riken Co., Ltd.
    Inventor: Teruo Kawai
  • Patent number: 5805375
    Abstract: A microfabricated wobble motor with a positioning arm attached to the wobble motor rotor acts as a fine positioner with bidirectional movement. The primary application is a rotary actuator for the read/write head in a very small magnetic recording disk drive. An integrated head-arm assembly is attached at one end to the rotor of the wobble motor. The other end of the head-arm assembly has a head carrier that is maintained in contact with the disk. Head position error information is read from the disk and used to provide control signals to each of the stator elements. The stator elements are sequentially addressed by applying a voltage from a driver circuit. This causes the rotor to be electrostatically attracted to the activated stators, so that the rotor is movable bidirectionally. The read/write head can thus be moved bidirectionally to any of the data tracks on the disk and maintained on a desired data track for reading or writing data.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: September 8, 1998
    Assignee: International Business Machines Corporation
    Inventors: Long-Sheng Fan, Robert Edward Fontana, Jr., Tomotake Furuhata, Timothy Clark Reiley, Hans Helmut Zappe
  • Patent number: 5793134
    Abstract: In a drive arrangement for driving a pump of the axial-piston type, of which solely the swash-plate member (8) is shown, from a motor (1), the main novel feature is that the motor shaft (9) is directly connected or connectable to the swash-plate member (8), thus eliminating problems caused by a previously used intermediate shaft between the motor shaft and the swash-plate member.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: August 11, 1998
    Assignee: Kew Industri A/A
    Inventor: Erik Kristensen Worm
  • Patent number: 5747915
    Abstract: A nonelectromagnetic motor comprising a base, a bent shaft which is rotable relative to the base wherein the bent shaft comprises a straight portion aligned with a main axis and an offset portion that is offset with respect to the main axis; and a drive means for driving the offset portion of the bent shaft along a generally circular path in a plane perpendicular to the main axis to rotate the bent shaft. The bent shaft and drive means for driving the bent shaft can be selected from piezoelectric, magnetostrictive, rheological and shape memory alloys. The drive means of the nonelectromagnetic motor can additionally comprise a shell which shell surrounds and houses the bent shaft and precesses or gyrates which in turn causes the bent drive shaft to rotate. The nonelectromagnetic motor does not rely on friction for the application of torque upon a rotor.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: May 5, 1998
    Assignee: Sandia Corporation
    Inventor: Gilbert L. Benavides
  • Patent number: 5719458
    Abstract: A power generator includes an electromagnet for generating a rotating magnetic field when being excited by a three-phase alternating current applied thereto, a rotation output shaft rotatably supported on a supporting member in such a manner as to be positioned in the rotating magnetic field, and permanent magnets disposed around the rotation output shaft in such a manner that the polarity thereof is reverse to that of the rotating magnetic field. The permanent magnets are rotated together with the rotation output shaft, and magnetic bodies disposed outside the permanent magnets in such a manner as to be rotated together with the rotation output shaft. A magnetic flux of the permanent magnets passes through the magnetic bodies. Magnetic tooth portions are provided around outer peripheral portions of the magnetic bodies. Each of the magnetic tooth portions has a width being nearly equal to the width of the rotating magnetic field.
    Type: Grant
    Filed: July 5, 1996
    Date of Patent: February 17, 1998
    Assignee: Nihon Riken Co., Ltd.
    Inventor: Teruo Kawai
  • Patent number: 5708311
    Abstract: An integrated electric motor-driven in-line hydraulic pump that includes a housing with an internal shaft, and a cylinder block mounted for rotation on the shaft. The rotor of an electric motor has an internally affixed bearing sleeve that is rotatably supported with respect to the shaft surrounding the cylinder block within the housing. Teeth on the sleeve engage splines on the cylinder block for rotatably coupling the rotor to the cylinder block. The stator of the electric motor is affixed within the housing surrounding the rotor. Pistons are operatively coupled to the cylinder block and engage a yoke plate for obtaining positive displacement pumping action upon energization of the motor. Fluid inlet and outlet ports feed hydraulic fluid through the housing to the cylinder block and pistons, and from the cylinder block to the outlet port.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: January 13, 1998
    Assignee: Vickers, Inc.
    Inventors: Leslie M. Claar, Robert C. Hodges
  • Patent number: 5705869
    Abstract: An axial magnetic thrust bearing stator includes a plurality of laminated cores. Each of the cores is magnetically conductive, situated in a common plane, and symmetrically situated about a center of rotation. A plurality of electrically conductive coils are provided with each coil situated at least partially in a respective one of the cores.
    Type: Grant
    Filed: June 21, 1995
    Date of Patent: January 6, 1998
    Assignee: General Electric Company
    Inventors: Gerald Burt Kliman, Mark Alan Preston
  • Patent number: 5703422
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 30, 1997
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5677583
    Abstract: A electric motor is capable of increased output torque and efficiency in utilizing magnetic energy. The electric motor includes a plurality of electromagnets arranged annularly, each of the electromagnets having a magnetically permeable armature and a winding therearound, and a rotor formed of magnetic material, the rotor being rotatably supported and surrounded by the annularly arranged electromagnets. An output shaft is fixed to the rotor for outputting rotational motion of the rotor. At least one portion of the outer periphery of the rotor is able to approach or contact an energized one of the electromagnets by attracting force thereof. A current control device energizes the electromagnets in a predetermined sequence and timing. At least one electromagnet, among the annularly arranged electromagnets, which is situated at a downstream or forward side of the closest point to the electromagnets on the outer periphery of the rotor relative to the rotational direction thereof, is energized.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: October 14, 1997
    Assignee: Nihon Riken Co., Ltd.
    Inventor: Teruo Kawai
  • Patent number: 5675197
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 7, 1997
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5672923
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 30, 1997
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5656879
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 12, 1997
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5635782
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 3, 1997
    Assignee: Sarcos Group
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5610460
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 11, 1997
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5606209
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: February 25, 1997
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5579290
    Abstract: The stator of the motor comprises two pole pieces (1, 2) which are axially staggered. An axially magnetized cylindrical rotor (5) is disposed in the openings or bores of said pole pieces. The rotor (5) is provided with an external toothing (3) which is continuously engaged with an internal toothing (4) of the stator. In the unexcited stator, the rotor (5) assumes a stable position by attraction to the pole pieces (1, 2). Due to the excitation of the stator by a pulse having a suitable polarity, the rotor is displaced to a diametrically opposed stable position. The toothings (3, 4) stay in engagement during said displacement, resulting in an angular displacement of the rotor, the angle being defined by the difference of the number of teeth of said toothings (3, 4). The motor allows a miniaturization and a simple control by alternating pulses of opposed polarities.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: November 26, 1996
    Assignee: R. Audemars SA
    Inventors: Roberto Zafferri, Marco Brandestini
  • Patent number: 5545943
    Abstract: The variable air-gap type driving detector of the present invention for obtaining low speed and high torque outputs required to drive, for example, joints of industrial robots is provided with an elastic supporting means 22, whose one end is supported on a base stand 21 , for supporting a rotor 5 so as to restrain the rotor 5's autorotation; and an eccentric supporting meals, whose rotation shaft 23b is supported on the base stand 21 in a freely rotatable state, and an outside of whose eccentric shaft 23a is supported inside the motor 5, and further whose rotation shaft 23b rotates with the revolution of the rotor 5; and the driving device of the invention becomes simple in structure and small in size by being composed of using no cranks or only a crank.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: August 13, 1996
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akira Satake, Yoshitaka Onishi, Sotsuo Miyoshi
  • Patent number: 5508572
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 16, 1996
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5497041
    Abstract: In a low speed geared motor, a rotational magnetic field is formed in a stator against S-poles and N-poles in a permanent magnetic ring capable of being elliptically deformed. An external gear is rotated while internally meshing with an internal gear by means of rotation of the elliptical deformation caused in the permanent magnetic ring by the rotational magnetic field. As a result, the external gear is rotated on its axis by a difference between the number of teeth in the external gear and that in the internal gear for one rotation of the elliptical deformation. The rotational component is transmitted to an output shaft through a transmission means while absorbing the elliptically deformed component. With this construction, it is possible to enhance the energy conversion efficiency with a small size, to achieve a longer continuous operation, to almost eliminate backlash and hysteresis, to reduce the angular momentum, to improve.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: March 5, 1996
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventors: Masatoshi Kondoh, Kiyoji Minegishi
  • Patent number: 5479058
    Abstract: A geared motor employing a brushless induction motor in nested arrangement, either concentrically inwardly or concentrically outwardly, with a gear reduction device employing two gear wheels, one with interior teeth and one with exterior teeth, said teeth being meshed together. The difference in the number of teeth is small relative to the total number of teeth of each gear wheel. One of the two gear wheels moves in an eccentric path, is free to rotate relative to the rotor but is driven thereby. The other gear is fixed relative to the housing. An output accommodating the eccentric movement of the free gear derives reduced rotational speed and torque from the system.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: December 26, 1995
    Inventor: Yoshio Seidou
  • Patent number: 5448117
    Abstract: A stepper motor includes a stator with magnetic poles extending radially outward from a central core to form segments of an outer stator surface, an armature ring fitting loosely over the stator, and a rotor with a drive plate rotationally driven by rollers extending from the armature ring into apertures in the drive plate. Current is supplied, according to a sequence, through coils surrounding each magnetic pole, so that the armature ring, being sequentially attracted to adjacent magnetic poles, moves around the stator with a modified orbital motion including an orbital motion, in which the ring is translated around a circular path, and a rotational motion. The stepper motor may also include a stationary cam plate with a number of peripheral notches, into which the rollers are moved individually by the orbital motion.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: September 5, 1995
    Assignee: Consulier Engineering, Inc.
    Inventor: Hubert A. Elliott
  • Patent number: 5426336
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: July 7, 1993
    Date of Patent: June 20, 1995
    Assignee: Sarcos, Inc.
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5338993
    Abstract: An improved motor apparatus includes five motor coils which are connected with a stator and are sequentially energizeable to cause a rotor to nutate and rotate relative to the stator. Control circuitry includes an upper transistor and a lower transistor which are connected with opposite ends of a motor coil. The upper transistor is rendered nonconducting and current is conducted from one end of the motor coil through the lower transistor back to the motor coil to maintain the motor coil energized. A holding circuit is effective to energize one of the coils to maintain gear teeth on the stator and rotor in meshing engagement to hold the rotor against movement to relative to the stator. Annular rim surface areas on the stator and rotor are maintained in abutting engagement during nutation and rotation of the rotor relative to the stator and during holding of the rotor stationary with the gear teeth in meshing engagement.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: August 16, 1994
    Assignee: Eaton Corporation
    Inventors: Edward R. Briggs, Gary H. Daebelliehn, Peter S. Winzen, Donald R. Bellgraph
  • Patent number: 5309041
    Abstract: A step motor comprising two sets of annularly arranged electromagnets and which are disposed in left and right frame bodies respectively in bilateral symmetry, a wobble disc of magnetic body arranged between the sets of electromagnets, a supporting shaft which is pivotally coupled to the center of the light surface of the wobble disc and fixedly coupled to a bearing portion at the center of the right frame body, an output shaft which is fixedly coupled to the center of the left surface of the wobble disc by way of a universal joint and rotatably supported by a bearing portion at the center of the left frame body, a crown gear fixedly arranged on the magnetically permeable armatures of the right set of electromagnets and a crown gear fixedly arranged on the right surface of the wobble disc at the outer circumferential portion thereof which confronts the crown gear on the right set of electromagnets and has teeth different in number from those of the crown gear.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: May 3, 1994
    Assignees: Nihon Riken Kabushiki Kaisha, Teruo Kawai, Keiichiro Asaoka, Tsutomu Asai
    Inventors: Teruo Kawai, Tsutomu Asai
  • Patent number: 5252870
    Abstract: An eccentric-motion motor for driving a utilization mechanism includes a stator defining a closed surface pathway, an armature composed of a permanent magnet rollably disposed on the closed surface pathway, a series of electromagnetic elements disposed in the stator along the closed surface pathway, circuitry for successively energizing the electromagnetic elements to cause them to attract and/or repel the armature so that it rolls along the closed surface pathway, and a coupler mechanism for coupling the armature to the utilization mechanism so that as the armature is caused to roll, the utilization mechanism is powered by the operation of the motor.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: October 12, 1993
    Inventors: Stephen C. Jacobsen, Clark C. Davis
  • Patent number: 5237234
    Abstract: An electrostatic motor comprising a stator and a rotor, one of which is equipped with a plurality of lands to which a voltage is sequentially applied. The other of the stator and rotor is made of conductive material. Rolling contact is established between the stator and rotor along at least one line of contact. The rolling contact is controlled to repetitive first and second paths along first and second surfaces of the stator and rotor, respectively, in which the lengths of the first and second paths are different. Embodiments include a cylindrical motor, a flexible disk motor and a conical motor.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: August 17, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: Robert W. Jebens, William H. Ninke, William S. N. Trimmer
  • Patent number: 5148068
    Abstract: In an electromagnetic actuator for moving an object, a plurality of electromagnetic circuits is provided to produce a moving magnetic field in a substrate. There is disposed a flexible resilient plate wholly or partially made of a magnetic material. When the electromagnetic circuits impart a magnetic force to the magnetic material to produce a traveling wave in the flexible resilient plate. Also, a magnetic fluid may be disposed on the substrate and the flexible resilient plate be disposed in close contact with the surface of the magnetic fluid.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: September 15, 1992
    Assignee: Zexel Corporation
    Inventors: Takeo Kushida, Toshiro Higuchi
  • Patent number: 5142932
    Abstract: A plurality of identical modules are serially connected together with each module including a base plate and a top plate interconnected by a universal joint assembly so that the top plate is adapted to pivotally nutate around the base plate to describe a cone in space. An array of twenty-four electromagnets, sequentially energized in sets of three, are arranged in a ring around the periphery of the base plate. Selective energization of the eight sets of electromagnets causes the rim of the top plate to be magnetically attracted to the energized electromagnets. The tilt of the top pivot plate is detected and controlled over a range of 360.degree., thus permitting a series string of modules to assume any desired elongated configuration.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: September 1, 1992
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Israel A. Moya, Philip A. Studer
  • Patent number: 5093594
    Abstract: A microfabricated, harmonic side-drive "wobble" type micromotor exhibiting increased torque output without the need for air levitation or for insulation on the rotor. Stator pieces are arranged about a circular space. In the center of that space is a bearing. An annular rotor in the space, about the bearing, has an inner surface always in rolling contact with the bearing. The outer surface of the rotor is separated from the stator by an air gap.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: March 3, 1992
    Assignee: Massachusetts Institute of Technology
    Inventor: Mehran Mehregany