Patents by Inventor Hirotaka Kanazawa

Hirotaka Kanazawa 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 manufacturing a shaft structure having a spherical bulb
    Patent number: 4368572
    Abstract: A shaft structure comprising a shaft and a hollow spherical shell having diametrically aligned holes which are of a diameter smaller than the outer diameter of the shaft. The shell is secured to the shaft at the aligned holes by radially deforming the shaft. The method for manufacturing the shaft structure includes steps of forming the shell from a tubular blank by swaging the blank so that the opposite ends of the blank bite into the shaft to secure it firmly to the shaft.
    Type: Grant
    Filed: October 15, 1980
    Date of Patent: January 18, 1983
    Assignees: Toyo Kogyo Co., Ltd., Delta Kogyo Co., Ltd.
    Inventors: Hirotaka Kanazawa, Yoshikazu Yasuda, Kozo Harada, Susumu Yoshida