Patents by Inventor Katutoshi Mizumoto

Katutoshi Mizumoto 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).

  • Method for manufacturing high strength isotropic graphite piston components
    Patent number: 5525276
    Abstract: A method for manufacturing a high strength isotropic graphite including a kneading step to mix an aggregate consisting of carbonaceous fine powder with a pitch binder a molding step to mold the raw material prepared by re-pulverizing the kneaded mixture using rubber press method and a carbonizing and graphitizing step to fire carbonize and graphitize the molded product. The aggregate uses a fine mosaic coke powder as the aggregate, which mosaic coke powder is finely pulverized in a jet mill to an average particle size of 1 .mu.m or less and a maximum particle size of 5 .mu.m or less, and has a surface average electrostatic field intensity of 1.2.times.10.sup.4 esu/cm.sup.2 or more. The invention provides a high strength isotropic graphite having a high bending strength of 120 MPa or more, which is suitable for piston components of gasoline engines and provides a method for manufacturing high strength isotropic graphite.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: June 11, 1996
    Assignee: Tokai Carbon Company Ltd.
    Inventors: Seiichi Okuyama, Katutoshi Mizumoto, Sakae Ikegami