Patents by Inventor Tosio Izumi

Tosio Izumi 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).

  • Vibrating compressor
    Patent number: 4320448
    Abstract: A vibrating compressor wherein an alternating voltage is applied from a d-c power source to a drive coil vibrating in a magnetic field via a d-c/a-c converter circuit is disclosed. An alternating voltage of a square wave form is applied to the drive coil of the vibrating compressor in such a manner as to avoid the timing at which a counter electromotive force generated in the drive coil intersects with zero level.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: March 16, 1982
    Assignee: Sawafuji Electric Co., Ltd.
    Inventors: Yukio Okuda, Naohiro Katayama, Tosio Izumi