Patents by Inventor Masuhiro Onoyama

Masuhiro Onoyama 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).

  • Lubricating oil composition for use with sintered porous bearings
    Patent number: 5631211
    Abstract: Lubricating oil composition for use with sintered porous bearings includes a poly-.alpha.-olefin hydride or ethylene-.alpha.-olefin copolymer hydride containing base oil to which at least one additive selected from the group consisting of zinc dialkyl dithiophosphate, molybdenum dialkyl dithiocarbide, molybdenum dialkyl dithiophosphate and a sulfur-phosphorus containing extreme pressure additive is added in an amount of 0.01 to 5 parts by weight per 100 parts by weight of the base oil.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: May 20, 1997
    Assignee: Kabushiki Kaisha Sankyo Seiki Seisakusho
    Inventors: Hisaya Nakagawa, Michiaki Takizawa, Teruhiko Ohtaki, Katsumi Nagano, Masuhiro Onoyama, Tetsuo Ichimaru
  • Lubricating fluid composition for dynamic pressure bearing
    Patent number: 5629274
    Abstract: A lubricating fluid composition for dynamic pressure bearings which supports a shaft by dynamic pressure, said lubricating fluid composition comprising fine magnetic particles dispersed in a base oil solvent, to which solvent is added an amine anti-gelling agent.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: May 13, 1997
    Assignees: Sankyo Seiki Mfg. Co., Ltd., Taiho Industries Co., Ltd.
    Inventors: Masamichi Hayakawa, Toshihiro Kobayashi, Kazuya Shimizu, Yuusuke Matsumura, Masuhiro Onoyama, Katsumi Nagano
  • Lubricating fluid composition for dynamic pressure bearing
    Patent number: 5627147
    Abstract: A lubricating fluid composition for dynamic pressure bearings which supports the shaft of the bearing by dynamic pressure, wherein the lubricating fluid composition comprises fine magnetic particles dispersed in a base oil solvent which comprises a hydrogenated poly-.alpha.-olefin (PAO) and a polyol ester.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: May 6, 1997
    Assignees: Sankyo Seiki Mfg. Co., Ltd., Taiho Industries Co., Ltd.
    Inventors: Masamichi Hayakawa, Toshihiro Kobayashi, Kazuya Shimizu, Yuusuke Matsumura, Masuhiro Onoyama, Katsumi Nagano