Patents by Inventor Mitsuharu Nakahara

Mitsuharu Nakahara 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).

  • Variable compression system for internal combustion engines
    Patent number: 4516537
    Abstract: A variable compression system for internal combustion engines whose compression ratio is varied by hydraulic regulation of back and forth movement of a sub-piston slidably mounted within a sub-cylinder communicated with a combustion chamber, comprising a control valve for controlling pressure oil supply to a pressure oil chamber formed on a back face of the sub-piston and communicated, via passages, with a spill port for pressure oil release which is formed in a hollow, reciprocative member cooperatively connected to the sub-piston and relatively movably mounting a spilling regulation member thereon.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: May 14, 1985
    Assignee: Daihatsu Motor Company
    Inventors: Mitsuharu Nakahara, Tomio Ishida, Norifumi Honjo, Yoshitaka Yoshida