Patents by Inventor Toshinori Shimada

Toshinori Shimada 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 of fixing flange to peripheral edge of a disc spring
    Patent number: 5140733
    Abstract: A cone-shaped disc spring having a central circular portion, a peripheral portion concentric with the circular portion, and an intermediate portion connecting the central circular portion with the peripheral portion, the central circular portion and said peripheral portion being in planes spaced from each other in a direction perpendicular to the planes, the intermediate portion being corrugated and having at least two spiral corrugations extending from two points spaced around the perimeter of the circular portion, said points being at equal angular intervals from each other, each spiral corrugation having an equal width over the entire length thereof. A method of placing a flange over the peripheral edge of the disc spring involving using punches to form an L-shaped flange blank of the peripheral edge in a series of steps.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: August 25, 1992
    Assignee: Tatsuta Electric Wire & Cable Co., Ltd.
    Inventors: Toshinori Shimada, Shinichi Ohgashi, Shigeaki Motokawa, Kihachi Onishi