Patents by Inventor Katsuya Sugahara

Katsuya Sugahara 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).

  • Shaft for an electric motor with DC brake
    Patent number: 4663550
    Abstract: A motor with DC brake having a DC electromagnetic brake (10) arranged on the shaft (14) of the rotor (16) thereof, in which a partial shaft (14b) extending through and outward from the DC electromagnetic brake (10) is formed of a nonmagnetic metal material. A partial shaft (14a) extending through the rotor (16) is formed of a free cutting metal material, and partial shafts (14a) and (14b) are coaxially united to form the integral shaft (14) at a junction (18) by friction welding.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: May 5, 1987
    Assignee: Fanuc LTD
    Inventors: Shigeki Kawada, Yoichi Amemiya, Masatoyo Sogabe, Katsuya Sugahara