Patents by Inventor Kazuma Shimizu

Kazuma Shimizu 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).

  • Apex seal for rotary piston engines with separate sealing and support pieces
    Patent number: 4317648
    Abstract: An apex seal for rotary piston engines which comprises an elongated sealing piece and an elongated support piece which are superposed throughout their lengths. A side piece is provided at one end of the superposed pieces and has an inclined inward surface which is engaged with a correspondingly inclined end surface of the sealing piece but spaced from a correspondingly inclined end surface of the support piece. A spring is provided for urging the support and side pieces toward the inner wall of the rotor housing.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: March 2, 1982
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Kazuma Shimizu, Haruhiko Satow
  • Gas seal means for rotary piston engines
    Patent number: 4225295
    Abstract: Rotary piston engine has a rotor which is applied with coatings of a fluoride resin at each side surface in the vicinity of side seals so as to fill clearance between the rotor side surface and the adjacent inner surface of the side housing whereby an improved gas-tightness is obtained.
    Type: Grant
    Filed: October 26, 1978
    Date of Patent: September 30, 1980
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Kazuma Shimizu, Shiso Kariyama, Yoshimitsu Takeda, Masato Yoshimura
  • Corner seal means for rotary piston engines
    Patent number: 4222720
    Abstract: Rotary piston engine having a substantially polygonal rotor provided at each apex portion with an apex seal and corner seals. The corner seal is so arranged that it is forced under the gas pressure introduced in a space behind it toward the side housing. A filler member comprised of a non-rigid material such as a heat resistant rubber or a suitable composite material is provided in a clearance between the corner seal and an adjacent end of the apex seal so as to prevent gas leakage through the clearance.
    Type: Grant
    Filed: August 22, 1978
    Date of Patent: September 16, 1980
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Kazuma Shimizu, Yoshitaka Nomoto, Shisou Kariyama