Patents by Inventor Masutaka Sato

Masutaka Sato 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).

  • Device and method for controlling stop of hydraulic press and device and method for detecting trouble of speed selector valve
    Publication number: 20030159599
    Abstract: A rod pressure holding instruction section (67) controls a servo motor (37) to rotate a two-way pump (29) in a counter direction, and to supply hydraulic oil with pressure, which does not exceed pressure applied by an own weight of a ram (5U), to a two-way pump-side piping (49), increasing pressure. A difference between pressure in a rod-side cylinder chamber-side piping (43) of a speed switching valve (47) and pressure in a two-way pump-side piping (49) of the speed switching valve (47) is decreased, thereby decreasing an impact generated when switching the speed switching valve (47) and stopping the ram (5U) at a predetermined position.
    Type: Application
    Filed: December 4, 2002
    Publication date: August 28, 2003
    Inventors: Nobuaki Ariji, Masutaka Sato