Patents by Inventor Takesi Kikukawa

Takesi Kikukawa 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).

  • Rotary type photoelectric switch
    Patent number: 4831253
    Abstract: A rotary type photoelectric switch comprises a rotary shaft rotated by an external force, a light interrupting plate coupled to the rotary shaft, a light-emitting element for emitting light, and a light-receiving element for receiving the light of the light-emitting element, wherein the light interrupting plate swings to enter into and exit from the lightpath formed between the light-emitting element and the light-receiving element. A stopper remote from the rotary shaft regulates the stroke of the light-interrupting plate, and a wavy spring or magnet reduce bounce of the plate.
    Type: Grant
    Filed: August 6, 1987
    Date of Patent: May 16, 1989
    Assignee: Omron Tateisi Electronics Co.
    Inventors: Yutaka Omura, Takesi Kikukawa