Patents by Inventor Tutomu Ichikawa

Tutomu Ichikawa 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).

  • Scroll type compressing apparatus having strengthened scroll member
    Patent number: 4904169
    Abstract: A scroll type compressing apparatus includes stationary and movable scroll wraps each having a strengthened inner end wall surface portion, and minimizes an excessive compression of a gaseous fluid in a compressing cell defined by the scroll wraps. The inner end wall surface portion is formed by an arcuate surface and a straight line surface tangent to an involute generating base circle from a line contacting point of one of the scroll wraps at which the inner end portion of the other scroll wrap contacts the inner wall surface of one of the scroll wraps when the gaseous fluid in the compressing cell is compressed at a prescribed target compression ratio.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: February 27, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Tutomu Ichikawa