Patents Examined by Alexander Moraza
  • Patent number: 11121613
    Abstract: A generator system having a dynamo that contains an armature, a stator and a housing. The armature rotates about a first axis of rotation. The stator is concentrically positioned around the armature. Both the armature and the stator are free to rotate in opposite directions about the first axis of rotation. The housing of the dynamo is connected to a motor that can rotate the dynamo around a second axis of rotation. There is an angle of inclination between the first axis of rotation and the second axis of rotation. This angle of inclination is selectively altered during operation. By changing the angle of inclination between the two axes of rotation, a precession can be created that adds rotational energy to both the armature and the stator. This increases the output of the dynamo and creates a highly efficient electrical generator.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: September 14, 2021
    Inventor: Craig H. Zeyher
  • Patent number: 11121614
    Abstract: An assembly for use in an axial flux motor or generator includes a rotor plate and a magnet, the magnet having a surface that is orthogonal to a magnetization direction of the magnet. The rotor plate is adapted to engage a rotor shaft that rotates about an axis of rotation, and the magnet is attached to the rotor plate. The rotor plate and magnet are configured and arranged such that, if the rotor plate and the magnet are separated from all other magnetic field generating components, then a distance between a first plane that intercepts a first point on the surface and to which the axis of rotation is normal and a second plane that intercepts a second point on the surface and to which the axis of rotation is normal is substantially greater than zero.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: September 14, 2021
    Assignee: E-Circuit Motors, Inc.
    Inventor: George Harder Milheim
  • Patent number: 11090795
    Abstract: A hand-held electric power tool includes a housing, a connecting seat, and an elastic member. The connecting seat is configured to couple a battery pack to the hand-held electric power tool along a first straight line whereby the battery pack and the hand-held electric power tool are electrically connected via the connecting seat. The connecting seat is operative to move along the first straight line and along a second straight line perpendicular to the first straight line. The elastic member is configured to movably connect the connecting seat to the housing, and is configured to generate a force at least along a third straight line inclined from the first straight line enabling the connecting seat and the battery pack to contact each other.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: August 17, 2021
    Assignee: Nanjing Chervon Industry Co., Ltd.
    Inventors: Jie Ren, Yuexiang Zhang
  • Patent number: 11088591
    Abstract: A motor comprising a frame and one or a plurality of magnets disposed inside the frame, wherein a gap extending in a circumferential direction is provided between an inner peripheral surface of the frame and an outer peripheral surface of the magnet, and the magnet and the frame arranged at both sides of the gap are coupled together in a rotational shaft direction by means of an adhesive.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: August 10, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Akiko Ikuta, Masaki Ogushi
  • Patent number: 11081849
    Abstract: The present invention relates to a slip ring, a motor, and a vehicle having same, the slip ring comprising: a cylindrical slip ring body; a plurality of blades formed protruding in the lengthwise direction of the slip ring body on an end portion of the slip ring body; and a brush contacting part disposed on the outer circumferential surface of the slip ring body, wherein the slip ring body and the blades are integrally formed. Accordingly, the motor, by means of the rotation of the blades, can dissipate frictional heat generated from friction between a brush and the slip ring and thus reduce the effects of heat, and can also guide and disperse airborne dust generated from friction between the brush and the slip ring to the outside.
    Type: Grant
    Filed: November 7, 2016
    Date of Patent: August 3, 2021
    Assignee: LG INNOTEK CO., LTD.
    Inventor: Hyun Soo Yu
  • Patent number: 11056958
    Abstract: A rotor of an electric motor includes a rotating shaft, a rotor core and a commutator fixed to the rotating shaft, and a first sleeve, a second sleeve and a third sleeve arranged around the rotating shaft. The first sleeve is located on a side of the rotor core away from the commutator and abuts against the rotor core, the second sleeve is located between the rotor core and the commutator, and the third sleeve is located on a side of the commutator away from the rotor core.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: July 6, 2021
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Jingxin Shi, Sijun Zhao, Luyan Bi, Pingman Zhang, Xionghui Liu, Lang Dai, Cong Lv, Feifei Huang, He Chi, Baoqiang Cheng, Seungpun Ho, Dawei Zhou, Zhijun Li, Zhiyu Chen
  • Patent number: 11038404
    Abstract: A rotary machine, in particular an electric machine, has a shaft, which extends in an axial direction and which has a cavity, and a heat pipe, in which a first thermal medium is arranged. The rotary machine is characterized in that the heat pipe is designed as an annular chamber, which surrounds the cavity. Improved cooling for the rotary machine is ensured by this arrangement.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: June 15, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Andreas Huber, Thinh Nguyen-Xuan, Nicolas Brossardt
  • Patent number: 11038388
    Abstract: A rotor of a rotary electric machine includes a rotor core of an approximately annular shape which has plural sets of plural magnet insertion holes arranged radially, the plural sets being arranged in a circumferential direction with a predetermined gap, and plural permanent magnets which are inserted into the magnet insertion holes, respectively. Each permanent magnet has a circular arc shape in a radial section, and a curved surface thereof is convex toward a rotation shaft of the rotor. Plural permanent magnets which are respectively inserted into the radially arranged plural magnet insertion holes in each set includes a first permanent magnet which is positioned on an outer circumferential surface side and a second permanent magnet which is positioned on a rotation shaft side and has a radial thickness equal to or larger than a radial thickness of the first permanent magnet.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: June 15, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Shingo Soma, Yoshihisa Kubota
  • Patent number: 11038391
    Abstract: A stator includes a cylindrical core with a plurality of longitudinally extending slots, a first winding set formed as a first cascaded wire in two radial layers of the slots, a second winding set formed as a second cascaded wire in two other radial layers of the slots, and a jumper connecting the first and second wires. A first winding set may have three cascaded phase wires in first and second layers of the slots, and a second winding set may have three cascaded phase wires in third and fourth layers of the slots. A winding set of a first phase may have a first cascaded wire in two radial layers of a first one of the slots, and a winding set of a second phase may have a second cascaded wire in two other radial layers of the first one of the slots.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: June 15, 2021
    Assignee: BorgWarner Inc.
    Inventor: Kirk Neet
  • Patent number: 11027406
    Abstract: The hand machine tool according to the invention has an integrated tool or a tool holder 2 to receive a tool 4. An electric motor 5 serves to drive the tool 4 or the tool holder 2. A battery pack 18 for supplying power to the electric motor 5 can be pushed into a guide 23 in a first direction. A plurality of electrical contacts 31 for contacting counter contacts 32 of the battery pack 18 are disposed in a contact holder 36. Wires 40, which are connected in each case to one of the electrical contacts 31, have cores which extend in a wave-like manner in the first direction 28 adjacent to the electrical counter contact 32.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: June 8, 2021
    Assignee: Hilti Aktiengesellschaft
    Inventors: Helmut Burger, Thomas Thanner, Rene Richter
  • Patent number: 11025123
    Abstract: A motor includes a stator unit and a rotor rotatable relative to the stator unit. The stator unit includes a stator, a resin portion, a support portion, and an annular recess. The stator includes a stator core, an insulator, and a conducting wire wound around the stator core with the insulator interposed therebetween. The resin portion covers at least part of the stator. The support portion supports the stator. At an end portion of the stator unit on one side in an axial direction, the recess is recessed toward another side in the axial direction. The resin portion is positioned further in a radially outer direction than the recess. The rotor includes an annular projection extending toward the other side in the axial direction. At least part of the projection is accommodated in the recess.
    Type: Grant
    Filed: May 21, 2018
    Date of Patent: June 1, 2021
    Assignee: NIDEC CORPORATION
    Inventors: Yuta Yamasaki, Takaya Okuno, Yoshihisa Kitamura, Tadayuki Kanatani, Hideki Aoi, Shoki Yamazaki
  • Patent number: 11000933
    Abstract: In an angle electric power tool 1 in which an output axis P intersects and is orthogonal to a motor axis J, a battery attachment portion 40 is provided to the rear of a grip 30 so as to extend in the rearward direction and a battery pack 50 is configured to be attached to an upper surface of said battery attachment portion 40. Because of this configuration, the battery pack 50 does not directly come into contact with a working surface W, thereby preventing flaws and scratches on the working surface W.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 11, 2021
    Assignee: MAKITA CORPORATION
    Inventor: Junya Ishikawa
  • Patent number: 11002289
    Abstract: A rotary electric machine includes a stator, a rotor, a plurality of coils, and a plurality of flow enhancement members. Each coil has a compound outer surface along major sections thereof with an insulating layer disposed therealong. The compound outer surfaces of each pair of adjacent coils define a channel extending along adjacent major sections of each adjacent pair of coils. One of the flow enhancement members is disposed within each channel between the adjacent major sections of each pair of adjacent coils, with each flow enhancement member defining a gap between the compound outer surface of one of the coils and the flow enhancement member through which cooling fluid may flow.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: May 11, 2021
    Assignee: Caterpillar Inc.
    Inventors: Jonathan M. Baumann, Rodwan T. Adra, Timothy J. Schlack, Gregory T. Austin
  • Patent number: 10998787
    Abstract: An electric machine includes a stator core defining slots and hairpins disposed in the slots. The hairpins are selectively joined at connections to form windings that include at least first and second radial layers. Each connection is disposed in one of the layers. The connections are staggered such that the connections of the first layer are circumferentially offset from the connections of the second layer to increase clearance for tooling that forms the connections.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: May 4, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Franco Leonardi, Feng Liang
  • Patent number: 10995820
    Abstract: A flywheel apparatus that magnetically unloads a top rotor bearing is described. The apparatus includes a flywheel housing, a rotor with a vertical axis of rotation that includes a magnetic material, a magnet configured to apply a desired upward off-loading force along the vertical axis of rotation, an upper bearing connected to an upper shaft of the rotor, and a bearing housing disposed between the upper bearing and the flywheel housing that substantially prevents downward axial motion of the upper bearing. The magnet includes an electromagnet. A force sensor is used to measure a force on the upper bearing which is provided as input to a controller that updates the current to the electromagnet. The rotor is maintained in a fixed axial position and a spring disposed below a lower bearing absorbs axial dimension growth of the rotor.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: May 4, 2021
    Inventors: Seth R. Sanders, Peter Thomas Tennessen, Daniel Bakholdin, Matthew Brandon Garten, Mark J. Holloway, Matthew K. Senesky
  • Patent number: 10985642
    Abstract: A power transmission device includes: a high speed magnet rotor which includes a magnet array which is magnetized in a radial direction; a low speed magnet rotor which includes a magnet array which is magnetized in a circumferential direction; and an inductor rotor which allows magnetic fluxes from the magnet array of the high speed magnet rotor to pass, and the high speed magnet rotor, the low speed magnet rotor and the inductor rotor are concentrically arranged and the magnet array of the low speed magnet rotor is formed such that homopolar surfaces of neighboring magnets face each other in the circumferential direction.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: April 20, 2021
    Assignee: SANYO DENKI CO., LTD.
    Inventors: Satoshi Sugita, Yuqi Tang, Yasushi Misawa, Shigenori Miyairi
  • Patent number: 10985630
    Abstract: A cooling fan module includes a fan and a PMDC motor. The PMDC motor includes a stator and a rotor. The stator has 2P magnetic poles. The rotor includes a rotary shaft, a rotary core, a commutator, and a winding. The rotor core includes m×P pole teeth. The commutator includes k×m×P commutator segments. Adjacent pole teeth define therebetween winding slots for receiving the winding. The winding includes winding units each having P coils. Each of two ends of each winding unit includes a lead-out line connected to the commutator segment. Any two lead-out lines extending out of different winding slots are spaced from each other at locations outside the commutator segments.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: April 20, 2021
    Assignee: Johnson Electric International AG
    Inventors: Rui Feng Qin, Fei Liu
  • Patent number: 10971977
    Abstract: Provided is a stator for a rotary electric machine which can suppress the mechanical effects of thermal expansion and contraction of a fixing member for fixing a temperature detector, on a temperature detection element. The stator for a rotary electric machine includes a stator coil, a temperature detection unit including a temperature detection element, a protection member extending in a longitudinal direction to cover the temperature detection unit, and a fixing member serving as a positioning mechanism for the temperature detection unit with respect to a stator coil. The fixing member includes a clamp portion for fixing the protection member, and the clamp portion clamps the protection member at a position where the clamp portion does not overlap the temperature detection element in a longitudinal direction of the protection member.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: April 6, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuichiro Baba, Taku Ito
  • Patent number: 10971980
    Abstract: A rotor in one embodiment includes an annular rotor main unit and a fitting portion that extends inward or outward one of an inner circumference and an outer circumference of the rotor main unit to be connected with a rotary shaft. The fitting portion is formed at a position at which a centerline of the fitting portion is offset in parallel with respect to a normal line that is associated with a tangent line of the one of the inner circumference and the outer circumference.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: April 6, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Hiroshi Abe, Takashi Nakagawa
  • Patent number: 10960530
    Abstract: System for cooling a power tool. One exemplary power tool includes a housing including an air intake and an air exhaust. The power tool further includes a motor and a fan configured to pull cooling air into the housing through the air intake, and exhaust the cooling air out of the housing through the air exhaust. The power tool further includes a plurality of field-effect transistors (FETs). The FETs couple the stator coils to a power source. The power tool further includes a FET board within the housing. The power tool further includes a heat sink within the housing. The heat sink includes a first mounting portion and a second mounting portion. Each of the mounting portions includes a horizontal fin extending toward a respective side of the housing. A plurality of vertical fins extends from a top surface of each of the horizontal fins.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: March 30, 2021
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Nikos A. Gainacopulos, Michael R. Sande, Michael A. Matthews, Derek J. Schwab, Steve Cunningham