Patents by Inventor Kengo Tanaka

Kengo Tanaka 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: 20070017305
    Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.
    Type: Application
    Filed: September 22, 2006
    Publication date: January 25, 2007
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
  • Publication number: 20070004303
    Abstract: A stretchable composite fabric appropriate to sports wear and under wear is a woven or knitted fabric including a composite yarns (A) formed from stretchable yarns (1) having a self-elongation of 5% or more upon absorbing water and an elongation at break of 200% or more and non-stretchable yarns (2) having a self-elongation less than 5% upon absorbing water, and yarns (B) including stretchable yarns (3) having a self-elongation less than 5% upon absorbing water and an elongation at break of 30% or more, wherein the yarns (1) and (2) in a sample taken from the composite fabric respectively have a length L1 and a length L2, the ratio L1/L2 is 0.9 or less, and the yarns (1) can self-elongate upon absorbing water and shrink upon drying.
    Type: Application
    Filed: October 18, 2004
    Publication date: January 4, 2007
    Inventors: Kengo Tanaka, Kenji Iwashita
  • Patent number: 7121153
    Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: October 17, 2006
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
  • Publication number: 20060223400
    Abstract: A woven or knitted fabric, formed from two types of yarns different in self-elongating property upon absorbing water and capable of facilitating the air-permeability when wetted with water, is constituted so that a ratio A/B of a mean length A of yarns (1) having a high water-absorbing, self-elongating property to a mean length B of yarns (2) arranged in the same direction as that of the yarn (1) and having a lower water-absorbing, self-elongating property than that of the yarn (1) is adjusted to 0.9 or less.
    Type: Application
    Filed: June 17, 2004
    Publication date: October 5, 2006
    Inventors: Satoshi Yasui, Seiji Mizohata, Takeshi Yamaguchi, Kengo Tanaka
  • Publication number: 20050247140
    Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.
    Type: Application
    Filed: July 20, 2005
    Publication date: November 10, 2005
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
  • Patent number: 6937009
    Abstract: A rotation sensor comprising: a stator of the rotation sensor; a rotator arranged around the stator in a rotatable manner relative to the stator, so as to detect a rotated-angle variation of a detection target correspondingly to an overlapped state of the rotator with the stator; and a casing for accommodating the rotator therein; wherein at least a part of an outer peripheral surface of the rotator is slidable relative to an inner surface of the casing for accommodating the rotator and stator therein, so that the rotator is constantly smoothly rotated, to thereby accurately detect the rotated-angle variation of the measurement target.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: August 30, 2005
    Assignee: The Furukawa Co., Ltd.
    Inventors: Takehisa Ishihara, Tomotaka Watanabe, Fumihiko Abe, Dongzhi Jin, Kengo Tanaka
  • Patent number: 6925893
    Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: August 9, 2005
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
  • Patent number: 6860159
    Abstract: The rotation sensor (10) has a cylindrical first rotor (11) made of an insulating magnetic material, having conductor layers (11a) arranged circumferentially, the first rotor being attached to a rotating first shaft (5a) at a predetermined axial position; a fixed core (12) having an exciting coil (12b), the core being fixed to a fixing member with a space secured in the axial direction with respect to the first shaft; a second rotor (13) having nonmagnetic metal bodies (13b) arranged circumferentially to oppose the conductor layers respectively, the second rotor being attached to a second shaft located adjacent to and rotating relative to the first shaft (5a) and being located between the first rotor (11) and the fixed core (12); and oscillating device connected to the exciting coil (12b), the oscillating device transmitting an oscillation signal of a specific frequency.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: March 1, 2005
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Dongzhi Jin, Fumihiko Abe, Masahiro Hasegawa, Tsuyoshi Nakamoto, Kengo Tanaka, Kazuhiko Matsuzaki, Kosuke Yamawaki
  • Publication number: 20040051521
    Abstract: A rotation sensor comprising: a stator of the rotation sensor; a rotator arranged around the stator in a rotatable manner relative to the stator, so as to detect a rotated-angle variation of a detection target correspondingly to an overlapped state of the rotator with the stator; and a casing for accommodating the rotator therein; wherein at least a part of an outer peripheral surface of the rotator is slidable relative to an inner surface of the casing for accommodating the rotator and stator therein, so that the rotator is constantly smoothly rotated, to thereby accurately detect the rotated-angle variation of the measurement target.
    Type: Application
    Filed: June 20, 2003
    Publication date: March 18, 2004
    Inventors: Takehisa Ishihara, Tomotaka Watanabe, Fumihiko Abe, Dongzhi Jin, Kengo Tanaka
  • Publication number: 20040050180
    Abstract: A rotation sensor includes a first rotor constituted by a magnetic material and having an outer face that has first conductive layers disposed in two levels as viewed in the direction of a rotation axis and second conductive layers disposed outwardly of and between the first conductive layers, a second rotor having metal members corresponding to the first conductive layers of the first rotor, and a stationary core having a stationary core body that accommodates therein two exciting coils that are spaced from each other in the direction of the rotation axis. The second rotor is disposed between the first rotor mounted to a first shaft and the stationary core fixed to a stationary member, and is mounted to a second shaft which is rotatable relative to the first shaft.
    Type: Application
    Filed: September 17, 2002
    Publication date: March 18, 2004
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin, Kazuhiko Matsuzaki, Tsuyoshi Nakamoto, Masakazu Matsui, Hideharu Yonehara, Tomotaka Watanabe, Kosuke Yamawaki, Takahiro Ueno
  • Publication number: 20040011146
    Abstract: A rotation-sensored rotary connector includes: a rotary connector for electrically connecting an electrical component installed on a steering to a vehicle-body side; and a rotation sensor for detecting a rotational angle of the steering; wherein the rotation sensor includes a rotor to be directly mounted on a steering shaft, and the rotary connector includes a rotor to be rotated in compliance with the rotor of the rotation sensor, thereby allowing to detect the rotational angle of the steering with an excellent precision.
    Type: Application
    Filed: May 29, 2003
    Publication date: January 22, 2004
    Inventors: Takehisa Ishihara, Tomotaka Watanabe, Fumihiko Abe, Dongzhi Jin, Kengo Tanaka
  • Patent number: 6672175
    Abstract: A rotation sensor provided with a first rotor fixed to a shaft, a second rotor fixed to the same or other shaft and adjoining the first rotor, and a core having a resonance coil, arranged around the first rotor, and which coil forms a magnetic circuit working with the first rotor. The first rotor is formed of a magnetic material comprising an insulator; an irregular magnetic field is formed with the core; and the second rotor is provided with a conductor cutting across areas of different intensities of the irregular magnetic field in accordance with the difference of the angle of rotation when a difference in the angle of relative rotation occurs at a shaft position where the first rotor is fixed and at a shaft position where the second rotor is fixed.
    Type: Grant
    Filed: August 20, 2002
    Date of Patent: January 6, 2004
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Dongzhi Jin, Fumihiko Abe, Kengo Tanaka
  • Publication number: 20030051562
    Abstract: A rotation sensor provided with a first rotor fixed to a shaft, a second rotor fixed to the same or other shaft and adjoining the first rotor, and a core having a resonance coil, arranged around the first rotor, and which coil forms a magnetic circuit working with the first rotor. The first rotor is formed of a magnetic material comprising an insulator; an irregular magnetic field is formed with the core; and the second rotor is provided with a conductor cutting across areas of different intensities of the irregular magnetic field in accordance with the difference of the angle of rotation when a difference in the angle of relative rotation occurs at a shaft position where the first rotor is fixed and at a shaft position where the second rotor is fixed.
    Type: Application
    Filed: August 20, 2002
    Publication date: March 20, 2003
    Inventors: Dongzhi Jin, Fumihiko Abe, Kengo Tanaka
  • Publication number: 20030051563
    Abstract: A rotation sensor provided with a first rotor fixed to a shaft, a second rotor fixed to the same or other shaft and adjoining the first rotor, and a core having a resonance coil, arranged around the first rotor, and which coil forms a magnetic circuit working with the first rotor. The first rotor is formed of a magnetic material comprising an insulator; an irregular magnetic field is formed with the core; and the second rotor is provided with a conductor cutting across areas of different intensities of the irregular magnetic field in accordance with the difference of the angle of rotation when a difference in the angle of relative rotation occurs at a shaft position where the first rotor is fixed and at a shaft position where the second rotor is fixed.
    Type: Application
    Filed: August 20, 2002
    Publication date: March 20, 2003
    Inventors: Dongzhi Jin, Fumihiko Abe, Kengo Tanaka
  • Patent number: 6532831
    Abstract: To provide a rotation sensor for detecting a relative rotation angle, which shows little variation in detection accuracy even in the presence of disturbances. The rotation sensor detects a variation in impedance of each of two exciting coils (12b) which is produced depending on the strength of eddy currents induced in first and second rotors (11, 13), and determines a relative rotation angle on the basis of a difference between the amounts of both variations. A first conductive layer (11a) is provided on at least one of the opposite sides of the first rotor as viewed along a rotation axis, and consists of a plurality of portions arranged in a circumferential direction of the first rotor with predetermined spaces between. The stationary core (12) is so arranged that a core body (12a) holding the two exciting coils (12b) is symmetrical with respect to a plane normal to the rotation axis.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: March 18, 2003
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Dongzhi Jin, Fumihiko Abe, Kengo Tanaka
  • Patent number: 6481296
    Abstract: A rotation sensor (10) provided with a first rotor (11) fixed to a predetermined position in the axial direction of the shaft, a second rotor (12) fixed to the shaft (5) adjoining the first rotor, and a magnetic material core (13) having a resonance coil (13c) arranged around the first rotor and forming a magnetic circuit working with the first rotor. The first rotor (11) is formed by a magnetic material comprised of an insulator, an irregular magnetic field is formed with the magnetic material core, and the second rotor (12) is provided with a conductor cutting across areas of different intensities of the irregular magnetic field in accordance with the difference of the angle of rotation when a difference in the angle of relative rotation occurs at a shaft position where the first rotor is fixed and a shaft position where the second rotor is fixed.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: November 19, 2002
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Dongzhi Jin, Fumihiko Abe, Kengo Tanaka, Kazuhiko Matsuzaki, Masahiro Hasegawa, Kosuke Yamawaki
  • Publication number: 20020078764
    Abstract: The rotation sensor (10) has a cylindrical first rotor (11) made of an insulating magnetic material, having conductor layers (11a) arranged circumferentially, the first rotor being attached to a rotating first shaft (5a) at a predetermined axial position; a fixed core (12) having an exciting coil (12b), the core being fixed to a fixing member with a space secured in the axial direction with respect to the first shaft; a second rotor (13) having nonmagnetic metal bodies (13b) arranged circumferentially to oppose the conductor layers respectively, the second rotor being attached to a second shaft located adjacent to and rotating relative to the first shaft (5a) and being located between the first rotor (11) and the fixed core (12); and oscillating device connected to the exciting coil (12b), the oscillating device transmitting an oscillation signal of a specific frequency.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 27, 2002
    Inventors: Dongzhi Jin, Fumihiko Abe, Masahiro Hasegawa, Tsuyoshi Nakamoto, Kengo Tanaka, Kazuhiko Matsuzaki, Kosuke Yamawaki
  • Publication number: 20020043115
    Abstract: To provide a rotation sensor for detecting a relative rotation angle, which shows little variation in detection accuracy even in the presence of disturbances.
    Type: Application
    Filed: November 8, 2001
    Publication date: April 18, 2002
    Inventors: Dongzhi Jin, Fumihiko Abe, Kengo Tanaka
  • Publication number: 20010004849
    Abstract: A rotation sensor (10) provided with a first rotor (11) fixed to a predetermined position in the axial direction of the shaft, a second rotor (12) fixed to the shaft (5) adjoining the first rotor, and a magnetic material core (13) having a resonance coil (13c) arranged around the first rotor and forming a magnetic circuit working with the first rotor. The first rotor (11) is formed by a magnetic material comprised of an insulator, an irregular magnetic field is formed with the magnetic material core, and the second rotor (12) is provided with a conductor cutting across areas of different intensities of the irregular magnetic field in accordance with the difference of the angle of rotation when a difference in the angle of relative rotation occurs at a shaft position where the first rotor is fixed and a shaft position where the second rotor is fixed.
    Type: Application
    Filed: February 21, 2001
    Publication date: June 28, 2001
    Inventors: Dongzhi Jin, Fumihiko Abe, Kengo Tanaka, Kazuhiko Matsuzaki, Masahiro Hasegawa, Kosuke Yamawaki
  • Patent number: 6141015
    Abstract: A method of determining collision occurring in a virtual space generated by a system using a computer includes the steps of preparing, for drawing data approximating a virtual object in the virtual space by a plurality of rectangular parallelepipeds, machine readable first shape data for collision determination approximating the virtual object by a plurality of rectangular parallelepipeds smaller in number than rectangular parallelepipeds of the drawing data, and determining, as a prescribed point moving in the virtual space moves, whether the prescribed point and the virtual object satisfy a predetermined collision condition or not, based on a coordinate of the prescribed point in the virtual space and the first shape data, by computer calculation. An apparatus for implementing this method is also disclosed.
    Type: Grant
    Filed: March 4, 1998
    Date of Patent: October 31, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kengo Tanaka