Patents by Inventor Masashi Era

Masashi Era 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).

  • Roll for a rolling mill, method of producing the same and the rolling mill incorporating the roll
    Patent number: 4697320
    Abstract: A method of producing a long-life roll for a rolling mill manufacturing a rolled sheet having brightness. At least the surface of the roll barrel is made of steel containing carbide, the average grain size of which is not greater than 0.6 .mu.m, and the areal ratio of the carbide in the matrix is 6-30%. The roll is manufactured by canning steel powder produced by an RST process into a metal cylindrical container in a vacuum, sintering the powder in the cylindrical container by hot isostatic pressing, working the sintered body into the cnfiguration of a roll by machining and further giving it a heat treatment and finishing work. The roll and a rolling mill incorporating the roll are also disclosed.
    Type: Grant
    Filed: June 28, 1984
    Date of Patent: October 6, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Joo Ishihara, Toshio Ogawa, Masashi Era, Ken-ichi Sato