Patents by Inventor Toyoki Kurosawa

Toyoki Kurosawa 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).

  • Emergency valve incorporating thermal foamable plastic material
    Patent number: 4072159
    Abstract: This emergency valve comprises a thermal foamable plastics element or a valve operation gear with a built-in thermal foamable plastics element, which is functioned by thermal foaming and expansion of the built-in thermal foamable plastics, and if a fire broken out near the valve, the valve should be automatically and non-reversibly closed or opened by the valve operation gear which is functioned by thermal foamed plastics or thermal foamed plastics in itself.
    Type: Grant
    Filed: December 19, 1975
    Date of Patent: February 7, 1978
    Inventor: Toyoki Kurosawa