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: 20100315074
    Abstract: A rotation angle detector, comprises a magnet having at least a top surface, a bottom surface and a peripheral surface, that is fixed at a detectable rotation body and the same is rotated as integral therewith, a magnetic detecting unit for detecting a strength of a magnetism for the magnet, that is arranged at a peripheral corner part as in vicinity thereof to be formed with the top surface or the bottom surface and with the peripheral surface of the magnet and an arithmetic processing unit for calculating a rotation angle of the detectable rotation body with using an output of the magnetic detecting unit. A part to be formed by removing a part of the peripheral corner part as all around thereof forms a connecting face to correspond between the top surface or the bottom surface and the peripheral surface, and the magnetic detecting unit is arranged at the connecting face as in vicinity thereof.
    Type: Application
    Filed: September 28, 2007
    Publication date: December 16, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin
  • Patent number: 7842628
    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: Grant
    Filed: June 17, 2004
    Date of Patent: November 30, 2010
    Assignee: Teijin Fibers Limited
    Inventors: Satoshi Yasui, Seiji Mizohata, Takeshi Yamaguchi, Kengo Tanaka
  • Publication number: 20100185412
    Abstract: A rotation angle detector for detecting an absolute rotation angle of a detectable rotation body to be rotated a multiple number thereof comprises a first rotation body to be rotated as a cycle of a rotation angle Tc corresponding to a rotation of the detectable rotation body, a first detecting unit for detecting the rotation angle of the first rotation body, a second rotation body to be rotated due to the first rotation body or the detectable rotation body and to be rotated as a cycle of a rotation angle Tm with corresponding to the rotation of the detectable rotation body, that is different from the cycle of the rotation angle Tc regarding the first rotation body.
    Type: Application
    Filed: September 28, 2007
    Publication date: July 22, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin
  • Publication number: 20100148764
    Abstract: A rotation angle detector for detecting the rotation angle of a rotator to be measured which detects the flux density, generated depending on rotation of the rotator to be measured, of a ring-like magnet fixed to the rotator by means of a magnetic detection element. Since a soft magnetic member is interposed between the ring-like magnet and the rotator, rotation angle of the rotator can be measured accurately without being affected by the material or diameter of the rotator or the fixing state of the rotation angle detector to the rotator. Consequently, a rotation angle detector for detecting the rotation angle of a rotator to be measured accurately without being affected by the material or diameter of the rotator or the fixing state of the rotation angle detector to the rotator is presented.
    Type: Application
    Filed: November 16, 2007
    Publication date: June 17, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Fumihiko Abe, Kengo Tanaka, Dongzhi Jin
  • Publication number: 20100109655
    Abstract: A rotation angle detector for detecting rotation angle of a rotator to be measured is provided. The detector includes a magnet which is fixed to the rotator to be measured and is rotated with the rotator to be measured and plural magnetic detection means respectively arranged at a prescribed angle, for detecting intensity of magnetic field generated by the magnet and outputting signals of electric charge based on the intensity of magnetic field. The detector further includes drive means for driving the plural magnetic detection means, where the drive means is capable of simultaneously changing magnetic sensitivities of the plural magnetic detection means in the same ratio. The detector further includes rotation angle calculation means for calculating rotation angle of the rotator to be measured based on signals output from the plural magnetic detection means.
    Type: Application
    Filed: September 13, 2007
    Publication date: May 6, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Kengo Tanaka, Fumihiko Abe, Dongzhi Jin
  • Publication number: 20100060272
    Abstract: A rotation angle detector for detecting a rotation angle of a detectable rotation body, comprises: a primary rotation body to be attached to the detectable rotation body and to rotate as integral with the detectable rotation body; a secondary rotation body to rotate as a predetermined rotation ratio for the primary rotation body; a primary rotation detection mechanism to output a signal to be varied periodically as corresponding to a rotation of the primary rotation body; a secondary rotation detection mechanism to output a signal to be varied periodically as corresponding to a rotation of the secondary rotation body; a signal processing unit to calculate the rotation angles of the primary and the secondary rotation bodies using the signals that the primary and the secondary rotation detection mechanisms output; and an operation processing unit to calculate the rotation angle of the detectable rotation body, based on the calculated rotation angle of the primary or of the secondary rotation body, and on a rela
    Type: Application
    Filed: June 14, 2007
    Publication date: March 11, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Kengo Tanaka, Fumihiko Abe, Dongzhi Jin
  • Publication number: 20100045271
    Abstract: To provide a rotation angle detector, which is characterized in that the rotation angle detector is for detecting a rotation angle of a measurable rotation body, by which it becomes able to measure the rotation angle of the measurable rotation body with an accuracy as higher even in a case where there may be happened such as an axial backlash or the like on an axis of rotation in the measurable rotation body, and then such a rotation angle detector 1 comprises: a magnetic detecting element 40, for detecting a magnetic flux density of a magnet 10 that is designed to be attached onto the measurable rotation body and then to be rotated as integral with the measurable rotation body, wherein the magnetic detecting element 40 is arranged at a position as approximately intermediate in a path from a north pole to a south pole according to a line of magnetic force due to the magnet 10, and then thereby it becomes able to measure the rotation angle of the measurable rotation body with the accuracy as higher even in the
    Type: Application
    Filed: December 14, 2007
    Publication date: February 25, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Kengo Tanaka, Fumihiko Abe, Dongzhi Jin
  • Publication number: 20100007341
    Abstract: A rotation angle detection device for detecting rotation angle of a rotator to be measured includes magnetic detection elements which are fixed to the circumference of the rotating body to be measured and detect magnetic flux density of magnet which is rotated with said rotating body to be measured. The device can calculate rotation angle of the rotating body to be measured from outputs of the magnetic detection elements. The device also includes magnetic bodies having two edge portions in positions where the magnet is inserted and are arranged along an area where a magnetic line of force of the magnet is formed.
    Type: Application
    Filed: December 14, 2007
    Publication date: January 14, 2010
    Applicant: THE FURUKAWA ELECTRIC CO., LTD
    Inventors: Kengo Tanaka, Fumihiko Abe
  • Publication number: 20090260124
    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 high water-absorbing, self-elongating yarns (1) to a mean length B of lower water-absorbing, self-elongating yarns (2) arranged in the same direction as that of the yarn (1) property is adjusted to 0.9 or less, the wetted fabric exhibits a change in roughness of 5% or more.
    Type: Application
    Filed: June 29, 2009
    Publication date: October 22, 2009
    Applicant: TEIJIN FIBERS LIMITED
    Inventors: Satoshi YASUI, Seiji Mizohata, Takeshi Yamaguchi, Kengo Tanaka
  • Publication number: 20080168845
    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: March 6, 2008
    Publication date: July 17, 2008
    Applicant: 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: 7360459
    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 22, 2006
    Date of Patent: April 22, 2008
    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: 7254992
    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: Grant
    Filed: May 29, 2003
    Date of Patent: August 14, 2007
    Assignee: The Furukawn Electric Co., Ltd.
    Inventors: Takehisa Ishihara, Tomotaka Watanabe, Fumihiko Abe, Dongzhi Jin, Kengo Tanaka
  • 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