Patents by Inventor Haruo Yokoyama

Haruo Yokoyama 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).

  • Rail grinding apparatus
    Patent number: 5303514
    Abstract: A rail grinding apparatus for railroad rails has a grinding belt wrapped around motor-driven pulleys which are rotatably mounted on a frame. The frame is supported on the surface of a rail by rollers which bear the weight of the grinding apparatus. A noise guard surrounds the grinding belt to reduce noise.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: April 19, 1994
    Assignees: Sumikin Osaka Plant Engineering Co., Ltd., Railway Technical Research Institute, Sumitomo Metal Technology Inc.
    Inventors: Hirotsugu Oishibashi, Soji Fujimori, Muneyuki Ohara, Haruo Yokoyama, Akihiro Hosokawa, Kosuke Nagai, Hideshi Miyazaki