Patents by Inventor Kiyoshi Hagimoto

Kiyoshi Hagimoto 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).

  • Scroll-type fluid machine with specific inner curve segments
    Patent number: 4856973
    Abstract: A scroll-type fluid machine includes a stationary spiral element and a revolving spiral element having a substantially identical configuration and a central small chamber defined between abutting points of both the spiral elements a volume of which is adapted to be reduced to substantially zero with relative rotation of both the spiral elements. Basically, each of the both spiral elements is formed of an outer curve segment and an inner curve segment formed of involute curves and a connection inner curve expressed by a particular equation and a connection outer curve expressed by another particular equation formed between the outer and inner curve segment. The strength of the spiral elements can be enhanced or a delivery port having a large area can be provided.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: August 15, 1989
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Takahisa Hirano, Kiyoshi Hagimoto, Kimiharu Takeda
  • Rotary type fluid machine
    Patent number: 4678415
    Abstract: A rotary type fluid machine including a stationary spiral element and a revolving spiral element respectively having a substantially identical configuration and disposed therein 180 degrees apart from each other in mutually nested relationship, the revolving spiral element being adapted to revolve in solar motion relationship with respect to the stationary spiral element with a radius of revolutionary motion .rho.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: July 7, 1987
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Takahisa Hirano, Kiyoshi Hagimoto