Patents by Inventor Etsuo Tamegai

Etsuo Tamegai 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).

  • Piston ring
    Patent number: 5531195
    Abstract: A piston ring developed to prevent aluminum deposition and adhesion thereon is disclosed. The piston ring includes a ring-shaped piston ring main body including upper, lower, outer circumferential surfaces. An anti-abrasion surface treatment layer is formed on at least the lower surface of the main body, and a polybenzimidazole resin coating film including a solid lubricant, is formed on a surface of the anti-abrasion surface treatment layer.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: July 2, 1996
    Assignee: Nippon Piston Ring Co., Ltd.
    Inventors: Motonobu Onoda, Takeshi Tsuchiya, Etsuo Tamegai, Katsuaki Ogawa, Makoto Murata