Patents by Inventor Ryuichi Kuboki

Ryuichi Kuboki 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).

  • Cutting oil composition for processing cemented carbide skiving hob
    Patent number: 4171558
    Abstract: A cutting oil composition for processing a cemented carbide skiving hob, which comprises (a) a base oil and (b) an effective amount to prevent wear of at least one additive blended therein selected from the group consisting of a metal-containing dithiophosphoric acid compound, a sulfonate, a phenate, a carboxylate and a phosphonate of an alkaline earth metal, and an alkyl- or arylphosphoric acid ester, the cutting oil composition having a viscosity at 100.degree. F. of from about 3 to about 25 centistokes. The use of the cutting oil composition can obviate the compression collapse of the edge of a tool and give finished gears of good quality.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: October 23, 1979
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Hideo Igrashi, Toshimitsu Hirose, Ryuichi Kuboki, Masato Ainoura