Patents by Inventor Daisuke Kitagawa

Daisuke Kitagawa 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: 20160214311
    Abstract: A disclosed method for producing an elongated filler-containing fluororesin sheet includes: a step (I) of forming a strip member from a strip sheet containing a fluororesin, a filler, and a forming aid; and a step (II) of forming an elongated sheet strip by rolling the strip member in a longitudinal direction of the strip member. In the step (I), the strip member is formed by bending the strip sheet in such a manner that quadrilaterals formed on a surface of the strip member, each defined by two strip member side edges extending in the longitudinal direction of the strip member and two strip sheet side edges of the strip sheet that crosses a region between the two strip member side edges are parallelograms each having an acute angle ? as an interior angle and that the parallelograms are arranged in the longitudinal direction of the strip member.
    Type: Application
    Filed: September 11, 2014
    Publication date: July 28, 2016
    Inventors: Daisuke KITAGAWA, Kenichi TAGAWA, Kimiaki TAUCHI, Yoshinari TAKAYAMA
  • Publication number: 20160137105
    Abstract: A vehicle seat having a seat back and seat cushion connected to the seat back, the seat back and seat cushion being retractable to a retraction floor disposed lower than a vehicle body floor, is described. The vehicle seat includes: a support base connected to the vehicle body floor, disposed below the seat cushion, and pivotally connected to a lower end of the seat back; a detachable leg having an upper end attached to the seat cushion and lower end connectable to the support base; a leg retaining member attached to the support base to detachably retain the lower end of the detachable leg; and a base cover that covers the support base. The leg retaining member is disposed at a rear side of a front end of a portion of the base cover in a front to back direction of the seat to cover the support base from above.
    Type: Application
    Filed: June 12, 2014
    Publication date: May 19, 2016
    Inventors: Takeshi Akutsu, Daisuke Kitagawa, Taro Murayama
  • Publication number: 20150321589
    Abstract: A seat device includes a seat back frame; right and left cushion side frames respectively disposed at right and left sides of a lower part of the seat back frame; a cover fixing member for fixing a cover covering a surface of a cushion pad(s) attached to one of the right and left cushion side frames. The cover fixing member extends downward from the cushion side frame and extends in the front-rear direction. The seat device further includes a cover fastener for fastening the cover to the cover fixing member. The cover fastener includes an engaging portion engaging with the cover fixing member and a main fastener integrally formed with the engaging portion. The main fastener extends in the front-rear direction. The cushion side frame is fitted with a rotation regulating member for regulating the rotation of the cover fastener about the engaging portion.
    Type: Application
    Filed: November 18, 2013
    Publication date: November 12, 2015
    Applicant: TS TECH CO., LTD.
    Inventors: Hirotaka TAKEI, So IWAKATA, Daisuke KITAGAWA
  • Patent number: 9153761
    Abstract: The present invention provides a thermally-conductive sheet excellent in heat dissipation properties. The thermally-conductive sheet includes a polymer matrix and a thermally-conductive filler dispersed in the polymer matrix. The present invention is a thermally-conductive sheet including a polymer matrix and non-spherical particles of a thermally-conductive filler that are dispersed in the polymer matrix. At least a part of the thermally-conductive filler particles are oriented in a thickness direction of the sheet.
    Type: Grant
    Filed: October 3, 2012
    Date of Patent: October 6, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Yoshinari Takayama, Takafumi Hida, Daisuke Kitagawa, Kenichi Tagawa, Kunio Nagasaki, Ryoichi Matsushima, Susumu Kiyohara, Toshio Uota
  • Patent number: 8985818
    Abstract: The LED mounting substrate of the present invention includes a thermally conductive layer (thermally conductive sheet (10)) made of a composition containing boron nitride powder and a fluororesin, and the fluororesin contains polytetrafluoroethylene. The thermally conductive layer has a thermal conductivity of 2 W/(m·K) or more. The thermally conductive layer has a reflectance of 0.80 or more at wavelengths of 380 nm, 470 nm, and 650 nm.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: March 24, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Daisuke Kitagawa, Yoshinari Takayama, Ichiro Suehiro, Hideyuki Usui, Takashi Oda
  • Patent number: 8945453
    Abstract: The present invention provides a method for producing a PTFE fiber that makes it possible, unlike the emulsion spinning process, to obtain a polytetrafluoroethylene (PTFE) fiber, particularly a long PTFE fiber, without using a matrix material, is more productive than conventional production methods such as a slit yarn process, and is capable of enhancing mechanical properties and the degree of freedom in diameter of the obtained fiber. The method for producing the PTFE fiber of the present invention includes the step of reducing a diameter of a string-shape PTFE-containing solid material (a first solid material) by drawing the first solid material at a temperature equal to or higher than a melting point of PTFE. The first solid material can be obtained from a PTFE-containing solid material (a second solid material) containing water and a surfactant, by reducing an amount of the water contained in the second solid material.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: February 3, 2015
    Assignees: Nitto Denko Corporation, National University Corporation Kyoto Institute of Technology
    Inventors: Daisuke Kitagawa, Takashi Wano, Hideki Yamane, Yoshihito Takagi
  • Patent number: 8895881
    Abstract: A power window switch has a case, a substrate disposed in the case, a window operation knob disposed on the case, a window lock button disposed on a front side of the window operation knob on the case, a window operation switch mechanism disposed in the case and activated in accordance with an operation of the window operation knob, a window lock switch mechanism disposed in the case and activated in accordance with an operation of the window lock button, and a connector having a terminal with a first terminal end protruding from the case and a second terminal end connected to the substrate. The window lock switch mechanism includes two conductive plate springs, and a pressing unit for pressing the plate springs.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: November 25, 2014
    Assignee: Omron Automotive Electronics Co., Ltd.
    Inventors: Takashi Nose, Manabu Sakai, Yasuhide Tanaka, Hidetoshi Yoshikawa, Akira Goto, Shiho Nakano, Takuya Nishioka, Tomohiro Takahashi, Yoshifumi Ohwa, Keiichi Shimizu, Daisuke Kitagawa, Kosuke Hirano, Masahiko Hara, Hiroaki Ohta
  • Publication number: 20140251588
    Abstract: The present invention provides a heat dissipating member containing a fluorine resin and a thermally-conductive filler and having good adhesive properties. The present invention is a heat dissipating member including: a porous base material containing a fluorine resin and a thermally-conductive filler; and an adhesive material contained in pores of the porous base material. The fluorine resin contains polytetrafluoroethylene.
    Type: Application
    Filed: October 3, 2012
    Publication date: September 11, 2014
    Inventors: Kenichi Tagawa, Yoshinari Takayama, Daisuke Kitagawa
  • Publication number: 20140252404
    Abstract: The present invention provides a thermally-conductive sheet excellent in heat dissipation properties. The thermally-conductive sheet includes a polymer matrix and a thermally-conductive filler dispersed in the polymer matrix. The present invention is a thermally-conductive sheet including a polymer matrix and non-spherical particles of a thermally-conductive filler that are dispersed in the polymer matrix. At least a part of the thermally-conductive filler particles are oriented in a thickness direction of the sheet.
    Type: Application
    Filed: October 3, 2012
    Publication date: September 11, 2014
    Inventors: Yoshinari Takayama, Takafumi Hida, Daisuke Kitagawa, Kenichi Tagawa, Kunio Nagasaki, Ryoichi Matsushima, Susumu Kiyohara, Toshio Uota
  • Publication number: 20130312936
    Abstract: The present invention provides a heat dissipating member having excellent heat dissipation properties and suitable for use in an oil environment. The present invention is a heat dissipating member including: a porous base material containing a fluorine resin and a thermally-conductive filler; and an oil contained in pores of the porous base material. The fluorine resin contains polytetrafluoroethylene. The heat dissipating member can be produced, for example, by a method including the steps of: (1) stacking and rolling together a plurality of sheet-shaped formed bodies each containing a polytetrafluoroethylene-containing fluorine resin, a thermally-conductive filler, and a molding aid, so as to obtain a rolled laminated sheet; (2) removing the molding aid from the obtained rolled laminated sheet to obtain a porous base material; and (3) impregnating the obtained porous base material with an oil.
    Type: Application
    Filed: October 20, 2011
    Publication date: November 28, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Daisuke Kitagawa, Yoshinari Takayama, Toshio Uota
  • Publication number: 20130309485
    Abstract: A thermally conductive film (10) includes a matrix (12) made of a resin and flaky filler particles (14) dispersed in the matrix (12). The flaky filler particles (14) each has a flaky filler body (16) made of boron nitride and a ?-ferrite coating (18) on the filler body (16), and are oriented in a through-thickness direction of the thermally conductive film (10). The resin is, for example, polyimide.
    Type: Application
    Filed: January 18, 2012
    Publication date: November 21, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yoshinari Takayama, Kenichi Tagawa, Daisuke Kitagawa, Tatsuhiro Takahashi, Koichiro Yonetake, Hiroshi Awano, Takumi Shoji, Mitsuteru Tada
  • Publication number: 20120325636
    Abstract: A power window switch has a case, a substrate disposed in the case, a window operation knob disposed on the case, a window lock button disposed on a front side of the window operation knob on the case, a window operation switch mechanism disposed in the case and activated in accordance with an operation of the window operation knob, a window lock switch mechanism disposed in the case and activated in accordance with an operation of the window lock button, and a connector having a terminal with a first terminal end protruding from the case and a second terminal end connected to the substrate. The window lock switch mechanism includes two conductive plate springs, and a pressing unit for pressing the plate springs.
    Type: Application
    Filed: June 21, 2012
    Publication date: December 27, 2012
    Applicant: OMRON AUTOMOTIVE ELECTRONICS CO., LTD.
    Inventors: Takashi Nose, Manabu Sakai, Yasuhide Tanaka, Hidetoshi Yoshikawa, Akira Goto, Shiho Nakano, Takuya Nishioka, Tomohiro Takahashi, Yoshifumi Ohwa, Keiichi Shimizu, Daisuke Kitagawa, Kosuke Hirano, Masahiko Hara, Hiroaki Ohta
  • Publication number: 20120230043
    Abstract: The LED mounting substrate of the present invention includes a thermally conductive layer (thermally conductive sheet (10)) made of a composition containing boron nitride powder and a fluororesin, and the fluororesin contains polytetrafluoroethylene. The thermally conductive layer has a thermal conductivity of 2 W/(m·K) or more. The thermally conductive layer has a reflectance of 0.80 or more at wavelengths of 380 nm, 470 nm, and 650 nm.
    Type: Application
    Filed: November 26, 2010
    Publication date: September 13, 2012
    Applicant: NITTO DENKO CORPORATION
    Inventors: Daisuke Kitagawa, Yoshinari Takayama, Ichiro Suehiro, Hideyuki Usui, Takashi Oda
  • Publication number: 20110223427
    Abstract: The method of producing an electrically insulating thermally conductive sheet of the present invention includes the steps of (I) preparing a plurality of sheet materials consisting essentially of a fluororesin containing polytetrafluoroethylene, thermally conductive inorganic particles, and a forming aid; (II) stacking the plurality of sheet materials on one another and rolling the stacked sheet materials together; and (III) removing the forming aid. In the production method of the present invention, the step (I) and the step (II) may be repeated alternately. The sheet material that can be used in the production method of the present invention is, for example, a base sheet obtained by forming a mixture composed of a fluororesin containing polytetrafluoroethylene, thermally conductive inorganic particles, and a forming aid into a sheet, or a laminated sheet obtained by stacking a plurality of base sheets on one another and rolling them together.
    Type: Application
    Filed: November 12, 2009
    Publication date: September 15, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takashi Wano, Daisuke Kitagawa, Yoshinari Takayama
  • Publication number: 20100203332
    Abstract: The present invention provides a method for producing a PTFE fiber that makes it possible, unlike the emulsion spinning process, to obtain a polytetrafluoroethylene (PTFE) fiber, particularly a long PTFE fiber, without using a matrix material, is more productive than conventional production methods such as a slit yarn process, and is capable of enhancing mechanical properties and the degree of freedom in diameter of the obtained fiber. The method for producing the PTFE fiber of the present invention includes the step of reducing a diameter of a string-shape PTFE-containing solid material (a first solid material) by drawing the first solid material at a temperature equal to or higher than a melting point of PTFE. The first solid material can be obtained from a PTFE-containing solid material (a second solid material) containing water and a surfactant, by reducing an amount of the water contained in the second solid material.
    Type: Application
    Filed: June 16, 2008
    Publication date: August 12, 2010
    Applicants: Nitto Denko Corporation, National University Corporation Kyoto Institute of Technology
    Inventors: Daisuke Kitagawa, Takashi Wano, Hideki Yamane, Yoshihito Takagi