Patents by Inventor Leo Arai

Leo Arai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11418093
    Abstract: An electric motor includes a front housing positioned on a load side and including an annular groove in an inner surface of the front housing, a winding wound around a stator core and including a coil end projecting forward from the stator core and disposed in the annular groove, and a heat conductive resin filled in the annular groove and configured to be in contact with both the coil end and the front housing.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: August 16, 2022
    Assignee: Fanuc Corporation
    Inventor: Leo Arai
  • Patent number: 11211738
    Abstract: The present invention provides a composite-cable relay device that connects individual wiring lines of a composite cable to two or more motor-side connectors included in a motor, the composite-cable relay device including: two or more relay-side connectors that are connected to the respective motor-side connectors; hollow housings that are secured to at least one of the relay-side connectors; a relay cable that possesses flexibility and that connects the hollow housings and the other relay-side connectors, wherein a connecting portion to which the composite cable is connected is provided in the hollow housings, and, in the interior of the hollow housing, wiring to be connected to the relay-side connector secured to the hollow housing and wiring to be connected to the relay cable branch off from each other.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: December 28, 2021
    Assignee: FANUC CORPORATION
    Inventors: Hidetoshi Uematsu, Leo Arai
  • Publication number: 20210066846
    Abstract: The present invention provides a composite-cable relay device that connects individual wiring lines of a composite cable to two or more motor-side connectors included in a motor, the composite-cable relay device including: two or more relay-side connectors that are connected to the respective motor-side connectors; hollow housings that are secured to at least one of the relay-side connectors; a relay cable that possesses flexibility and that connects the hollow housings and the other relay-side connectors, wherein a connecting portion to which the composite cable is connected is provided in the hollow housings, and, in the interior of the hollow housing, wiring to be connected to the relay-side connector secured to the hollow housing and wiring to be connected to the relay cable branch off from each other.
    Type: Application
    Filed: July 23, 2020
    Publication date: March 4, 2021
    Applicant: Fanuc Corporation
    Inventors: Hidetoshi UEMATSU, Leo ARAI
  • Patent number: 10886812
    Abstract: A stator of the present invention includes: a stator core; a front housing which is arranged on a front end portion side of the stator core; and a back housing which is arranged on a back end portion side of the stator core, where the stator further includes: a first sealant which is individually provided between the stator core and the front housing and between the stator core and the back housing; and a second sealant which is provided so as to coat the outer side of the stator core in a radial direction with the first sealant, and the first sealant and the second sealant are formed of the same curable resin integrally with each other. A motor of the present invention includes the stator and a rotor which is supported on the inner side of the stator such that the stator can be rotated with respect to the stator.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: January 5, 2021
    Assignee: FANUC CORPORATION
    Inventor: Leo Arai
  • Patent number: 10742081
    Abstract: A rotor includes: cylindrical rotor core blocks fixed to the rotary axis to be adjacent in an axial direction, the rotor core blocks including insertion portions disposed at intervals in an end surface in the axial direction so as to extend in the axial direction, and slots disposed at intervals in a circumferential direction so as to extend in the axial direction, the insertion portions of adjacent rotor core blocks facing each other and being successive to each other, and the slots facing each other and being successively each other; fixing pins having elasticity in an orthogonal planar direction orthogonal to the axial direction, the fixing pins being inserted to the insertion portions facing each other in the axial direction to fix the rotor core blocks to be adjacent in an axial direction; and magnets disposed in the slots to extend across the rotor core blocks.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: August 11, 2020
    Assignee: FANUC CORPORATION
    Inventor: Leo Arai
  • Publication number: 20200244144
    Abstract: An electric motor includes a front housing positioned on a load side and including an annular groove in an inner surface of the front housing, a winding wound around a stator core and including a coil end projecting forward from the stator core and disposed in the annular groove, and a heat conductive resin filled in the annular groove and configured to be in contact with both the coil end and the front housing.
    Type: Application
    Filed: January 16, 2020
    Publication date: July 30, 2020
    Applicant: Fanuc Corporation
    Inventor: Leo Arai
  • Publication number: 20190123606
    Abstract: A rotor includes: cylindrical rotor core blocks fixed to the rotary axis to be adjacent in an axial direction, the rotor core blocks including insertion portions disposed at intervals in an end surface in the axial direction so as to extend in the axial direction, and slots disposed at intervals in a circumferential direction so as to extend in the axial direction, the insertion portions of adjacent rotor core blocks facing each other and being successive to each other, and the slots facing each other and being successively each other; fixing pins having elasticity in an orthogonal planar direction orthogonal to the axial direction, the fixing pins being inserted to the insertion portions facing each other in the axial direction to fix the rotor core blocks to be adjacent in an axial direction; and magnets disposed in the slots to extend across the rotor core blocks.
    Type: Application
    Filed: October 10, 2018
    Publication date: April 25, 2019
    Applicant: FANUC CORPORATION
    Inventor: Leo ARAI
  • Publication number: 20190109509
    Abstract: A stator of the present invention includes: a stator core; a front housing which is arranged on a front end portion side of the stator core; and a back housing which is arranged on a back end portion side of the stator core, where the stator further includes: a first sealant which is individually provided between the stator core and the front housing and between the stator core and the back housing; and a second sealant which is provided so as to coat the outer side of the stator core in a radial direction with the first sealant, and the first sealant and the second sealant are formed of the same curable resin integrally with each other. A motor of the present invention includes the stator and a rotor which is supported on the inner side of the stator such that the stator can be rotated with respect to the stator.
    Type: Application
    Filed: September 26, 2018
    Publication date: April 11, 2019
    Applicant: FANUC CORPORATION
    Inventor: Leo ARAI
  • Patent number: 10122229
    Abstract: A motor according to an embodiment of the present invention includes a rotor having a rotor core and a plurality of magnetic poles including permanent magnets provided in the rotor core; and a stator having a stator core in which a plurality of teeth disposed on the side of the outer periphery of the rotor so as to be opposed to the plurality of magnetic poles and slots for containing armature winding wound around the plurality of teeth are formed.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: November 6, 2018
    Assignee: FANUC CORPORATION
    Inventor: Leo Arai
  • Publication number: 20170141630
    Abstract: A motor according to an embodiment of the present invention includes a rotor having a rotor core and a plurality of magnetic poles including permanent magnets provided in the rotor core; and a stator having a stator core in which a plurality of teeth disposed on the side of the outer periphery of the rotor so as to be opposed to the plurality of magnetic poles and slots for containing armature winding wound around the plurality of teeth are formed.
    Type: Application
    Filed: November 15, 2016
    Publication date: May 18, 2017
    Applicant: FANUC CORPORATION
    Inventor: Leo Arai