Patents by Inventor Masaaki Nishiwaki

Masaaki Nishiwaki 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).

  • Patent number: 8789666
    Abstract: A friction couple including a frictionally rubbing member that contains at least one of a binder and a filler, in which the binder and the filler have a modulus of elasticity of 1 GPa or higher and 15 GPa or lower, no softening point or no glass transition point in the range of ?50° C. or higher and 200° C. or lower, and a compressive strength of 50 MPa or higher at 25° C. and 25 MPa or higher at 200° C.; and a frictionally rubbed member. The ratio of the maximum value tan ?(Max) to the minimum value tan ?(Min) of the loss tangent tan ? of the frictionally rubbing member obtained through a dynamic viscoelastic measurement performed at a frequency of 0.1 Hz or higher and 20 Hz or lower and in the range of ?50° C. or higher and 250° C. or lower after thermoforming is 5 or less.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: July 29, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Abe, Masaaki Nishiwaki, Hiroshi Isono, Yukihiro Shiomi, Hiroyuki Fujikawa, Satoshi Wakamatsu
  • Patent number: 8492466
    Abstract: A friction material including: an amorphous resin that has a chain-like polymer structure; and other components that constitute the friction material and that are components other than the amorphous resin, wherein dispersion treatment is preliminarily carried out in which the amorphous resin is dispersed in at least one of the other components, and a manufacturing method of the friction material.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: July 23, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Abe, Masaaki Nishiwaki, Hiroshi Isono, Hiroyuki Fujikawa, Satoshi Wakamatsu, Yoshio Shimura, Yuji Nagasawa
  • Patent number: 8469161
    Abstract: A friction couple including: a first friction member that contains a metallic material and includes a first friction surface; and a second friction member that includes a second friction surface that contacts the first friction surface and that contains an oxidation film developer that accelerates formation of an oxidation film on at least one of the first friction surface and the second friction surface by oxidizing the metallic material when the first friction surface and the second friction surface contact each other.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: June 25, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, Advics Co., Ltd.
    Inventors: Kenji Abe, Masaaki Nishiwaki, Hiroshi Isono, Hiroyuki Fujikawa, Satoshi Wakamatsu, Yoshio Shimura, Yuji Nagasawa
  • Patent number: 8247472
    Abstract: A friction material including: an amorphous resin that has a chain-like polymer structure; and other components that constitute the friction material and that are components other than the amorphous resin, wherein dispersion treatment is preliminarily carried out in which the amorphous resin is dispersed in at least one of the other components, and a manufacturing method of the friction material.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: August 21, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Abe, Masaaki Nishiwaki, Hiroshi Isono, Hiroyuki Fujikawa, Satoshi Wakamatsu, Yoshio Shimura, Yuji Nagasawa
  • Publication number: 20120085605
    Abstract: A friction couple including a frictionally rubbing member that contains at least one of a binder and a filler, in which the binder and the filler have a modulus of elasticity of 1 GPa or higher and 15 GPa or lower, no softening point or no glass transition point in the range of ?50° C. or higher and 200° C. or lower, and a compressive strength of 50 MPa or higher at 25° C. and 25 MPa or higher at 200° C.; and a frictionally rubbed member. The ratio of the maximum value tan ?(Max) to the minimum value tan ?(Min) of the loss tangent tan ? of the frictionally rubbing member obtained through a dynamic viscoelastic measurement performed at a frequency of 0.1 Hz or higher and 20 Hz or lower and in the range of ?50° C. or higher and 250° C. or lower after thermoforming is 5 or less.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 12, 2012
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Abe, Masaaki Nishiwaki, Hiroshi Isono, Yukihiro Shiomi, Hiroyuki Fujikawa, Satoshi Wakamatsu
  • Publication number: 20110281962
    Abstract: A friction material including: an amorphous resin that has a chain-like polymer structure; and other components that constitute the friction material and that are components other than the amorphous resin, wherein dispersion treatment is preliminarily carried out in which the amorphous resin is dispersed in at least one of the other components, and a manufacturing method of the friction material.
    Type: Application
    Filed: July 29, 2011
    Publication date: November 17, 2011
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Abe, Masaaki Nishiwaki, Hiroshi Isono, Hiroyuki Fujikawa, Satoshi Wakamatsu, Yoshio Shimura, Yuji Nagasawa
  • Publication number: 20100174010
    Abstract: A friction material including: an amorphous resin that has a chain-like polymer structure; and other components that constitute the friction material and that are components other than the amorphous resin, wherein dispersion treatment is preliminarily carried out in which the amorphous resin is dispersed in at least one of the other components, and a manufacturing method of the friction material.
    Type: Application
    Filed: October 8, 2009
    Publication date: July 8, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji ABE, Masaaki NISHIWAKI, Hiroshi ISONO, Hiroyuki FUJIKAWA, Satoshi WAKAMATSU, Yoshio SHIMURA, Yuji NAGASAWA
  • Publication number: 20100163353
    Abstract: A friction couple including: a first friction member that contains a metallic material and includes a first friction surface; and a second friction member that includes a second friction surface that contacts the first friction surface and that contains an oxidation film developer that accelerates formation of an oxidation film on at least one of the first friction surface and the second friction surface by oxidizing the metallic material when the first friction surface and the second friction surface contact each other.
    Type: Application
    Filed: October 9, 2009
    Publication date: July 1, 2010
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.
    Inventors: Kenji ABE, Masaaki Nishiwaki, Hiroshi Isono, Hiroyuki Fujikawa, Satoshi Wakamatsu, Yoshio Shimura, Yuji Nagasawa
  • Publication number: 20060283672
    Abstract: A friction device includes at least one pair of sliding surfaces which are brought into contact with each other. The friction device comprises a friction material containing silicon carbide, and a mate material in which a cermet layer containing tungsten carbide is formed in a sliding surface of the mate material.
    Type: Application
    Filed: November 16, 2005
    Publication date: December 21, 2006
    Applicants: Toyota Jidosha Kabushiki Kaisha, Advics Co., Ltd.
    Inventors: Satoru Tsurubuchi, Hitoshi Ikeuchi, Masaaki Nishiwaki, Shigeru Ichikawa, Hiroyuki Fujikawa, Satoshi Wakamatsu, Tatsuhisa Kubota, Yuji Nagasawa, Kazunori Yoshida, Yoshio Shimura, Shigeru Hotta
  • Patent number: 6644892
    Abstract: A cable holder is deposited and fixed on an inner wall of a sewage pipe made of resin and supports an optical fiber for communication, which is passed through the pipe. The cable holder has a longitudinal section similar to that of an inverted pot and a narrowed inlet opening, and is provided with a pair of claws arranged in the axial direction of a pipe at its upper part. A cable holder driving device is raised in a state where the cable holder is heated and a pair of claws are pressure-fitted into the inner wall of the pipe. The pressure-fitting is carried out to such a degree that the cable fitted to and supported by the cable holder is brought into contact with the inner wall of the pipe. After the cable holder is cooled down and fixed, the cable passed through the pipe is pushed in the cable holder through its inlet opening.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: November 11, 2003
    Assignees: NihonHume Corporation, Consec Corporation
    Inventors: Masaaki Nishiwaki, Akira Kobayashi
  • Publication number: 20020187008
    Abstract: The cable holder is deposited and fixed on the ceiling part of a sewage pipe made of resin and supports an optical fiber for communication, which is passed through the pipe. The cable holder has a longitudinal section similar to that of an inverted pot and a narrowed inlet opening, and is provided with a pair of claws arranged toward the axial direction of a pipe at its upper part. A cable holder driving device is raised in a state where the cable holder is heated, wherein a pair of claws are pressure-fitted into the ceiling part of the pipe. The pressure-fitting is carried out to such a degree that the cable fitted to and supported by the cable holder is brought into contact with the inner wall of the pipe. After the cable holder is cooled down and fixed, the cable passed through the pipe is pushed in the cable holder through the inlet opening.
    Type: Application
    Filed: June 8, 2001
    Publication date: December 12, 2002
    Inventors: Masaaki Nishiwaki, Akira Kobayashi
  • Patent number: 5229955
    Abstract: A detecting apparatus for detecting a frictional coefficient of the road surface on which an automotive vehicle travels. In the detection apparatus, a plurality of condition amounts related to at least one of the vehicle in braking operation, turning operation and a weather condition during travel of the vehicle are detected. Fuzzy inference is carried out on the detected conditional amounts to determine the compatibility of road surface frictional coefficients corresponding with the detected condition amounts. The fuzzy inference outputs are used to calculate a road surface frictional coefficient.
    Type: Grant
    Filed: March 8, 1991
    Date of Patent: July 20, 1993
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masaaki Nishiwaki, Hiroshi Harada, Hisanori Kaneko