Patents by Inventor Shinpei Denoh

Shinpei Denoh 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 blank material suitable for oil drilling non-magnetic stabilizer
    Patent number: 4472207
    Abstract: A method of manufacturing a blank for an oil drilling stabilizer, which includes the steps of hot-working a stock of non-magnetic steel into a rod-like shape work item with a bulging large-diameter portion at a median point between opposite ends thereof; subjecting the resulting rod-like work item to an ordinary heat treatment solution and a machining operation to obtain a semi-finished work item of a shape substantially conforming with the desired shape; and then subjecting the semi-finished work item to cold axial compressive working in a die cavity of a complementary shape and within a work hardening temperature range.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: September 18, 1984
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Shushi Kinoshita, Shinpei Denoh, Yoshio Kitamura