Patents by Inventor Hironobu Kishi

Hironobu Kishi 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 a bearing structure of a wiper arm
    Patent number: 5319851
    Abstract: A method for manufacturing a bearing for a wiper arm structure includes the steps of: a) forming the bearing by sintering so that the outer peripheral surface of the bearing includes rough sintered surfaces of protruding ridges and recessed portion; b) sizing only the sintered surfaces of the protruding ridges without processing the recessing portions to smooth only outer peripheral surfaces of the protruding ridges so that the outer peripheral surfaces define a circular cross-section for the bearing, the sintered surfaces of the recessed portions remaining in a rough sintered condition relative to the outer peripheral surfaces of the protruding ridges which are sizing-processed; and c) forming a resin material on the outer peripheral surface of the bearing by insert molding.
    Type: Grant
    Filed: January 12, 1993
    Date of Patent: June 14, 1994
    Assignee: Mitsuba Electric Manufacturing Co., Ltd.
    Inventors: Ryu Ikezawa, Hironobu Kishi