Patents by Inventor Satosi Kumamoto

Satosi Kumamoto 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).

  • Shaft rotation driving apparatus for machine tool
    Patent number: 5966988
    Abstract: A shaft rotation driving apparatus for a machine tool having a main spindle for rotating a tool or a workpiece, comprises: a magnetic anisotropic rotor formed integral with the main spindle itself or with a rotary sleeve itself fitted to the main spindle; a stator disposed coaxially along an outer circumference of the magnetic anisotropic rotor; a field winding wound around the stator, for magnetizing the rotor in a predetermined direction; and an armature winding wound around the stator, for providing a rotative force to the rotor.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: October 19, 1999
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Katsuyosi Aiso, Sakasi Adati, Tosihiro Igarasi, Sin Tanoue, Satosi Kumamoto, Masanori Wakuda
  • Shaft rotation driving apparatus for machine tool
    Patent number: 5761962
    Abstract: A shaft rotation driving apparatus for a machine tool having a main spindle for rotating a tool or a workpiece, comprises: a magnetic anisotropic rotor formed integral with the main spindle itself or with a rotary sleeve itself fitted to the main spindle; a stator disposed coaxially along an outer circumference of the magnetic anisotropic rotor; a field winding wound around the stator, for magnetizing the rotor in a predetermined direction; and an armature winding wound around the stator, for providing a rotative force to the rotor.
    Type: Grant
    Filed: March 12, 1996
    Date of Patent: June 9, 1998
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Katsuyosi Aiso, Sakasi Adati, Tosihiro Igarasi, Sin Tanoue, Satosi Kumamoto, Masanori Wakuda
  • Shaft rotation driving apparatus for machine tool
    Patent number: 5549015
    Abstract: A shaft rotation driving apparatus for a machine tool having a main spindle for rotating a tool or a workpiece, comprises: a magnetic anisotropic rotor formed integral with the main spindle itself or with a rotary sleeve itself fitted to the main spindle; a stator disposed coaxially along an outer circumference of the magnetic anisotropic rotor; a field winding wound around the stator, for magnetizing the rotor in a predetermined direction; and an armature winding wound around the stator, for providing a rotative force to the rotor.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: August 27, 1996
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Katsuyosi Aiso, Sakasi Adati, Tosihiro Igarasi, Sin Tanoue, Satosi Kumamoto, Masanori Wakuda
  • Apparatus for producing high-speed rotation
    Patent number: 5525851
    Abstract: An apparatus for producing high-speed rotation has a rotary shaft integrally having a first rotor with magnetic anisotropy, and a rotary sleeve disposed around the rotary shaft. The rotary sleeve has a first stator surrounding to the first rotor and integrally has a second rotor having magnetic anisotropy. The first stator has a field winding for magnetizing the first rotor in a predetermined direction. This winding is also an armature winding because it undergoes high-speed rotation with the second rotor. The rotary sleeve is received in a housing which has a second stator surrounding the second rotor. The second stator has a field winding for magnetizing the second rotor in a predetermined direction and for producing high-speed rotation of the second rotor. By analogy, the housing can become a further rotary sleeve, constructed similarly to the above-mentioned rotary sleeve.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: June 11, 1996
    Assignee: Toshiba Kikai Kabushiki Kaisha
    Inventors: Satosi Kumamoto, Sin Tanoue, Masanori Wakuda