Patents by Inventor Tomu Sugimura

Tomu Sugimura 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).

  • HYDRAULIC CIRCUIT AND METHOD FOR CONTROLLING THE SAME
    Publication number: 20110158821
    Abstract: A hydraulic circuit includes a pump driven by a motor, an inverter for controlling the motor, and an accumulator. The inverter controls rotational speed of the motor such that the pump always discharges hydraulic fluid at a fixed flow rate, which is the sum of an average necessary flow rate and an adjustment flow rate. The accumulator operates, when the fixed flow rate and a necessary flow rate differ, in order to accumulate or discharge the hydraulic fluid to thereby secure the necessary flow rate.
    Type: Application
    Filed: December 16, 2010
    Publication date: June 30, 2011
    Inventors: Nobuyuki Sugimura, Tomu Sugimura