Patents by Inventor Takayuki Furuya

Takayuki Furuya 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 shock absorber with pre-loaded valve for linear variation characteristics of damping force
    Patent number: 5042624
    Abstract: A hydraulic shock absorber employs first and second stage disc valves arranged in tandem fashion. The first stage disc valve is provided for acting on a relatively small pressure difference for enhanced damping characteristics at a relatively low piston stroke speed range. On the other hand, the second stage disc valve is provided for acting on a greater pressure difference for generating damping a force at a higher piston stroke speed range. The second stage disc valve is initially pre-loaded at a predetermined magnitude of load so as to set a pressure relief point of the second stage disc valve at a desired piston stroke speed for better damping characteristics of the shock absorber.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: August 27, 1991
    Assignee: Atsugi Unisia Corporation
    Inventors: Takayuki Furuya, Fumiyuki Yamaoka