Patents by Inventor Yutaka Mabuchi

Yutaka Mabuchi 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).

  • Sliding element, sliding structure including the sliding element, and method for producing microscopic surface structure in the sliding element
    Publication number: 20030128903
    Abstract: A sliding structure including first and second sliding elements made of metal and including first and second sliding surfaces relatively slidable via a lubricating oil film therebetween, in which at least one of the first and second sliding surfaces having a microscopic surface structure including a base portion, dimples inward recessed from the base portion and separated from one another, and a peripheral portion defining the opening area of each of the dimples and extending along a periphery of each of the dimples. A ratio of a sum of opening areas of the dimples to an area of the at least one of the first and second surfaces is in a range of 5% to 60%. The peripheral portion has a height smaller than a thickness of the lubricating oil film.
    Type: Application
    Filed: November 8, 2002
    Publication date: July 10, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yoshiteru Yasuda, Makato Kano, Yutaka Mabuchi, Shinji Asano, Kenshi Ushijima
  • Cam lobe piece of built-up type camshaft
    Publication number: 20030033901
    Abstract: A cam lobe piece of a built-up type camshaft for an internal combustion engine. The built-up type camshaft includes a hollow shaft fixedly inserted in a shaft opening of the cam lobe piece upon diametrical expansion of the hollow shaft. The cam lobe piece comprises a base circle section having the shaft opening, and a cam lobe section formed integral with the base circle section.
    Type: Application
    Filed: July 2, 2002
    Publication date: February 20, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yoshimi Sugaya, Makoto Iwakiri, Takao Mitsuno, Kou Takayama, Hirokazu Fukagawa, Takayuki Hirao, Kimio Nishimura, Kouji Itakura, Mitsushi Oyanagi, Yutaka Mabuchi, Akira Fujiki, Yukihiro Maekawa, Yoshio Okada
  • Method of producing sintered metal sprocket and sprocket produced by the method
    Patent number: 6488736
    Abstract: A sintered metal sprocket for a silent chain is produced by the following steps. A base mixture is prepared, which contains a powder metallurgical iron powder, a lubricant and a graphite powder. Then, the base mixture is subjected to a compression molding while being heated at above approximately 100° C. thereby to produce a green compact. Then, the green compact is subjected to a sintering at a temperature above approximately 1180° C. For much improving the mechanical performance of the sprocket thus sintered, the same may be subjected to a carbonizing hardening or an induction hardening.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: December 3, 2002
    Assignees: Nissan Motor Co., Ltd., Hitachi Powdered Metals Co., Ltd.
    Inventors: Katsuhiko Ueda, Makoto Iwakiri, Yoshimi Sugaya, Yutaka Mabuchi, Masato Yamaguchi, Akira Fujiki, Yukihiro Maekawa, Masakazu Wada
  • Method of producing sintered metal sprocket and sprocket produced by the method
    Publication number: 20010038801
    Abstract: A sintered metal sprocket for a silent chain is produced by the following steps. A base mixture is prepared, which contains a powder metallurgical iron powder, a lubricant and a graphite powder. Then, the base mixture is subjected to a compression molding while being heated at above approximately 100° C. thereby to produce a green compact. Then, the green compact is subjected to a sintering at a temperature above approximately 1180° C. For much improving the mechanical performance of the sprocket thus sintered, the same may be subjected to a carbonizing hardening or an induction hardening.
    Type: Application
    Filed: March 19, 2001
    Publication date: November 8, 2001
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Katsuhiko Ueda, Makoto Iwakiri, Yoshimi Sugaya, Yutaka Mabuchi, Masato Yamaguchi, Akira Fujiki, Yukihiro Maekawa, Masakazu Wada