Patents by Inventor Hiroyuki Mikami

Hiroyuki Mikami 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).

  • Publication number: 20020145352
    Abstract: The present invention provides a permanent magnet rotating electric machine comprising a stator, a rotor having a rotor core and permanent magnets inserted into the rotor core, wherein the permanent magnets are shaped like an arc convex toward the stator and a flat surface facing toward the stator is provided at a tip end portion of each of the teeth of the stator.
    Type: Application
    Filed: February 27, 2001
    Publication date: October 10, 2002
    Inventors: Mamoru Kimura, Haruo Koharagi, Hiroyuki Mikami, Miyoshi Takahashi
  • Publication number: 20020145353
    Abstract: A permanent magnet type rotating electrical machine characterized by reduced vibration and noise, or improved efficiency. In a permanent magnet type rotating electrical machine comprising a stator 10 provided with concentrated winding and a rotor with permanent magnets 24 embedded in the rotor core 21, induced voltage waveform is improved by formation of two grooves or holes (flux barriers) extending in the axial direction for each magnetic pole on the bridge 25 of the core between the permanent magnet insertion hole 23 and the outer surface of rotor 20 in such a way that they are placed at an equally spaced interval over the entire circumference of the rotor 20.
    Type: Application
    Filed: September 26, 2001
    Publication date: October 10, 2002
    Inventors: Mamoru Kimura, Haruo Koharagi, Hiroyuki Mikami, Miyoshi Takahashi
  • Patent number: 6462451
    Abstract: The present invention provides a permanent magnet rotating electric machine comprising a stator, a rotor having a rotor core and permanent magnets inserted into the rotor core, wherein the permanent magnets are shaped like an arc convex toward the stator and a flat surface facing toward the stator is provided at a tip end portion of each of the teeth of the stator. With such configuration, the distortion factor of the waveform of an induced voltage in the permanent magnet rotating electric machine.
    Type: Grant
    Filed: February 27, 2001
    Date of Patent: October 8, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Mamoru Kimura, Haruo Koharagi, Hiroyuki Mikami, Miyoshi Takahashi
  • Patent number: 5076314
    Abstract: A nozzle flapper mechanism includes an electrostrictive device, a plate member coupled to the electrostrictive device, a nozzle having an orifice facing the electrostrictive device or the plate member, and a controller for applying a voltage to the electrostrictive device to keep a nozzle back pressure constant or vary the nozzle back pressure. The electrostrictive device comprises a shim, piezoelectric ceramics members disposed on the shim, and thin-film electrodes disposed on the piezoelectric ceramics members, the electrodes having an area smaller than that of the piezoelectric ceramics members, the piezoelectric ceramics members having one end directly fixed in position on a stationary member.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: December 31, 1991
    Assignee: SMC Corporation Sohka Kojo
    Inventors: Motoshige Ikehata, Hiroyuki Mikami, Naoto Inayama, Katsuhiko Odajima
  • Patent number: 5012835
    Abstract: A nozzle flapper mechanism includes an electrostrictive device, a plate member coupled to the electrostrictive device, a nozzle having an orifice facing the electrostrictive device or the plate member, and a controller for applying a voltage to the electrostrictive device to keep a nozzle back pressure constant or vary the nozzle back pressure. The electrostrictive device comprises a shim, piezoelectric ceramics members disposed on the shim, and thin-film electrodes disposed on the piezoelectric ceramics members, the electrodes having an area smaller than that of the piezoelectric ceramics members, the piezoelectric ceramics members having one end directly fixed in position on a stationary member.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: May 7, 1991
    Assignee: SMC Corporation
    Inventors: Motoshige Ikehata, Hiroyuki Mikami, Naoto Inayama, Katsuhiko Odajima
  • Patent number: 4934401
    Abstract: A nozzle flapper mechanism includes an electrostrictive device, a plate member coupled to the electrostrictive device, a nozzle having an orifice facing the electrostrictive device or the plate member, and a controller for applying a voltage to the electrostrictive device to keep a nozzle back pressure constant or vary the nozzle back pressure. The electrostrictive device comprises a shim, piezoelectric ceramics members disposed on the shim, and thin-film electrodes disposed on the piezoelectric ceramics members, the electrodes having an area smaller than that of the piezoelectric ceramics members, the piezoelectric ceramics members having one end directly fixed in position on a stationary member.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: June 19, 1990
    Assignee: SMC Corporation
    Inventors: Motoshige Ikehata, Hiroyuki Mikami, Naoto Inayama