Patents by Inventor Mitsuhiro Tamura

Mitsuhiro Tamura 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: 11088589
    Abstract: A power transmission device having a motor which includes a stator around which a coil is wound, a motor frame which covers the stator, and a cover which covers an axial end portion of the motor frame. In addition, the cover is formed of a non-conductive material, and a shortest creeping distance between a coil end of the coil and the cover is shorter than 6.3 mm.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: August 10, 2021
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Koji Moritani, Mitsuhiro Tamura
  • Publication number: 20210163646
    Abstract: Expandable resin particles that have a reduced VOC content, a method of producing the expandable resin particles, and a foamed molded product that has reduced VOC emission are provided. The expandable resin particles contain a base material resin containing, as a structural unit, a styrene unit and an acrylonitrile unit and an expanding agent. The expandable resin particles have a styrene content and an ethylbenzene content each of which is not more than a specific amount.
    Type: Application
    Filed: February 8, 2021
    Publication date: June 3, 2021
    Applicant: KANEKA CORPORATION
    Inventors: Atsushi Iida, Mitsuhiro Tamura, Yoichi Ohara
  • Patent number: 10989276
    Abstract: A gear motor includes a speed reducer and a motor. The speed reducer includes an internal gear, an external gear, an input shaft having an oscillating portion oscillating the external gear, an oscillating bearing which is disposed between the external gear and the oscillating portion, and an input bearing which supports the input shaft, the input shaft includes a protrusion portion which protrudes from the motor side such that a rotor of the motor is provided in the protrusion portion, and includes a bearing disposition section in which the input bearing is disposed and a rotor disposition section in which the rotor is disposed in this order from the speed reducer side toward the motor side, an outer diameter of the rotor disposition section is equal to or less than an outer diameter of the bearing disposition section, and a rotor magnet is directly fixed to the rotor disposition section.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: April 27, 2021
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Koji Moritani, Mitsuhiro Tamura
  • Publication number: 20210053210
    Abstract: A robot includes a first joint and a second joint positioned on a base end side from the first joint. A first speed reducer is incorporated in the first joint. A second speed reducer is incorporated in the second joint. A volume proportion of a resin occupying a constituent member of the first speed reducer is larger than a volume proportion of a resin occupying a constituent member of the second speed reducer.
    Type: Application
    Filed: August 21, 2020
    Publication date: February 25, 2021
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Patent number: 10895306
    Abstract: An eccentrically oscillating type reduction gear includes an internal gear, an external gear which meshes with the internal gear, and an eccentric body which oscillates the external gear. The external gear is formed of a resin, and the internal gear has an internal gear main body which is formed of a resin, and an outer pin which is rotatably disposed in a pin groove provided in the internal gear main body and is formed of a material having a thermal conductivity higher than that of the resin constituting the internal gear main body.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: January 19, 2021
    Assignee: SUMITOMO HEAVY INDUSTRIES CO., LTD.
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Publication number: 20210010566
    Abstract: An eccentric oscillation type speed reducer includes: an external gear which meshes with the internal gear; an eccentric body shaft which oscillates the external gear; and an input shaft bearing which supports the eccentric body shaft. The casing and the external gear are made of resin, and the input shaft bearing is made of metal.
    Type: Application
    Filed: September 29, 2020
    Publication date: January 14, 2021
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Patent number: 10830312
    Abstract: An eccentric oscillation type speed reducer includes: an internal gear; an external gear which meshes with the internal gear; an eccentric body shaft which oscillates the external gear; and a carrier disposed at a side portion of the external gear in an axial direction, in which the carrier includes a first carrier which is disposed on one side in the axial direction of the external gear, and a second carrier which is disposed on the other side in the axial direction of the external gear, a driven member is connected to the first carrier, the first carrier is made of metal, and the second carrier is made of resin.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: November 10, 2020
    Assignee: SUMITOMO HEAVY INDUSTRIES CO., LTD.
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Publication number: 20200325976
    Abstract: A gear device includes an internal gear and an external gear that meshes with the internal gear, in which the internal gear is made of a resin, the external gear is made of a material having a smaller linear expansion coefficient than the resin, and PCDs of the internal gear and the external gear before use of the gear device are set such that lost motion becomes 0 min or more and 15 min or less due to a difference in a thermal expansion amount between the internal gear and the external gear at a time of use of the gear device.
    Type: Application
    Filed: April 2, 2020
    Publication date: October 15, 2020
    Inventor: Mitsuhiro Tamura
  • Patent number: 10786848
    Abstract: An expandable poly methyl methacrylate particle including a polymer, which is obtained by a process including polymerizing monomers including 100 parts by weight of an acrylic monomer and from 0.05 to 0.15 parts by weight of a polyfunctional monomer. The acrylic monomer includes 90% to 98% by weight of methyl methacrylate and 2% to 10% by weight of an C2-8 alkyl acrylate, relative to a total weight of the methyl methacrylate and the C2-8 alkyl acrylate.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: September 29, 2020
    Assignee: KANEKA CORPORATION
    Inventors: Kirito Suzuki, Mitsuhiro Tamura, Tatsuya Henmi
  • Publication number: 20200200235
    Abstract: There is provided a gear device including an input shaft to which power is input, an internal gear, and an external gear. The input shaft has an input shaft hollow portion that extends in an axial direction, and an internal gear portion that meshes with an input pinion to be rotationally driven. The internal gear portion is configured so that the input pinion internally meshing with the internal gear portion and the input shaft hollow portion do not overlap each other when viewed in the axial direction.
    Type: Application
    Filed: October 29, 2019
    Publication date: June 25, 2020
    Inventors: Akira Yamamoto, Mitsuhiro Tamura
  • Patent number: 10693349
    Abstract: The life estimation system is a life estimation system that estimates a life of the reduction gear including a reduction mechanism. The life estimation system includes a sensor that is to be mounted onto the reduction gear and detects information for identifying a stress generated in a specific part of the reduction gear, and an estimating unit that identifies the stress generated in the specific part based on detection information obtained by the sensor and estimates the life of the specific part based on the identified stress.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: June 23, 2020
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Publication number: 20200191254
    Abstract: A reduction gear includes a reduction mechanism and a component which constitutes the reduction gear and in which a cavity portion is provided, in which the component includes a reinforcement structure which is provided in the cavity portion and forms a void in the cavity portion.
    Type: Application
    Filed: November 21, 2019
    Publication date: June 18, 2020
    Inventors: Masayuki Ishizuka, Mitsuhiro Tamura
  • Publication number: 20200172692
    Abstract: Expandable polystyrene-based resin particles may include a styrene-based monomer, a polysiloxane-containing macro monomer, and a coating composition having a melting point of 40° C. or greater. A coefficient of static friction of a foamed molded product, obtained by pre-expanding the expandable polystyrene-based resin particles and molding the pre-expanded expandable polystyrene-based resin particles, may be 4.0 or less. The expandable polystyrene-based resin particles may have a surface layer part that contains polysiloxane as a main component.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 4, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Mitsuhiro Tamura, Yoichi Ohara
  • Publication number: 20200172693
    Abstract: A method for producing expandable polystyrene-based resin particles, the method including producing polystyrene-based resin particles that comprise a styrene-based monomer and a polysiloxane-containing macro monomer, and impregnating an expanding agent into the polystyrene-based resin particles to produce the expandable polystyrene-based resin particles. The production of the polystyrene-based resin particles comprises the simultaneous addition of an initiator and the polysiloxane-containing macro monomer. The initiator causes the generation of one or more of an alkoxy radical and a carbonate radical.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 4, 2020
    Applicant: KANEKA CORPORATION
    Inventors: Mitsuhiro Tamura, Yoichi Ohara
  • Patent number: 10622867
    Abstract: A drive device configured to drive a container transporting device for transporting a container is provided. The drive device includes a motor which generates power, a brake configured to brake a movement generated by the power of the motor, and a speed reducer which has an output shaft connected to a driven portion of the container transporting device, includes a lubricant enclosed therein, and is configured to decelerate the power of the motor and transmit the decelerated power to the output shaft, in which the speed reducer, the brake, and the motor are disposed in this order from above in a vertical direction, a first seal member configured to block the lubricant is provided between the speed reducer and the brake, and the brake includes an accommodation chamber which accommodates a leaked lubricant in a case where the lubricant enclosed in the speed reducer leaks past the first seal member.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: April 14, 2020
    Assignee: SUMITOMO HEAVY INDUSTRIES, LTD.
    Inventors: Mitsuhiro Tamura, Akira Yamamoto, Koji Moritani
  • Publication number: 20200025277
    Abstract: An eccentrically oscillating type reduction gear includes an internal gear, an external gear which meshes with the internal gear, and an eccentric body which oscillates the external gear. The external gear is formed of a resin, and the internal gear has an internal gear main body which is formed of a resin, and an outer pin which is rotatably disposed in a pin groove provided in the internal gear main body and is formed of a material having a thermal conductivity higher than that of the resin constituting the internal gear main body.
    Type: Application
    Filed: July 12, 2019
    Publication date: January 23, 2020
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Publication number: 20190390735
    Abstract: A reduction gear includes an external gear, an internal gear which meshes with the external gear, a first member which synchronizes with a rotation of the external gear, a second member which synchronizes with a rotation of the internal gear, and a main bearing which is disposed between the first member and the second member, in which one of the first member and the second member is connected to a driven member and the other is fixed to an external member, and the first member, the second member, and the main bearing are formed of a material having a larger Young's modulus and larger specific gravity than those of a material constituting the external gear and the internal gear.
    Type: Application
    Filed: June 6, 2019
    Publication date: December 26, 2019
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Publication number: 20190264780
    Abstract: An eccentric oscillation type speed reducer includes: an internal gear; an external gear which meshes with the internal gear; an eccentric body shaft which oscillates the external gear; and a carrier disposed at a side portion of the external gear in an axial direction, in which the carrier includes a first carrier which is disposed on one side in the axial direction of the external gear, and a second carrier which is disposed on the other side in the axial direction of the external gear, a driven member is connected to the first carrier, the first carrier is made of metal, and the second carrier is made of resin.
    Type: Application
    Filed: February 19, 2019
    Publication date: August 29, 2019
    Inventors: Mitsuhiro Tamura, Akira Yamamoto
  • Publication number: 20190162271
    Abstract: A gear motor includes a speed reducer and a motor. The speed reducer includes an internal gear, an external gear, an input shaft having an oscillating portion oscillating the external gear, an oscillating bearing which is disposed between the external gear and the oscillating portion, and an input bearing which supports the input shaft, the input shaft includes a protrusion portion which protrudes from the motor side such that a rotor of the motor is provided in the protrusion portion, and includes a bearing disposition section in which the input bearing is disposed and a rotor disposition section in which the rotor is disposed in this order from the speed reducer side toward the motor side, an outer diameter of the rotor disposition section is equal to or less than an outer diameter of the bearing disposition section, and a rotor magnet is directly fixed to the rotor disposition section.
    Type: Application
    Filed: November 20, 2018
    Publication date: May 30, 2019
    Inventors: Koji Moritani, Mitsuhiro Tamura
  • Publication number: 20190140526
    Abstract: The life estimation system is a life estimation system that estimates a life of the reduction gear including a reduction mechanism. The life estimation system includes a sensor that is to be mounted onto the reduction gear and detects information for identifying a stress generated in a specific part of the reduction gear, and an estimating unit that identifies the stress generated in the specific part based on detection information obtained by the sensor and estimates the life of the specific part based on the identified stress.
    Type: Application
    Filed: October 29, 2018
    Publication date: May 9, 2019
    Inventors: Mitsuhiro Tamura, Akira Yamamoto