Patents by Inventor Kanehiro Hanayama

Kanehiro Hanayama 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).

  • Hub structure for a rotary wing aircraft
    Patent number: 5228834
    Abstract: A bearingless hub structure for a rotary-wing aircraft is provided, the structure including a hub body adapted to be securely connected to a rotor mast, a plurality of flexible beam members provided integrally with the hub body to extend radially outwardly, a pitch housing encircling each of the flexible beam members, and having a radially outward end portion which is rigid with a radially inward end portion of a rotor blade, a spherical bearing positioned adjacent to a radially inward end portion of the flexible beam member for supporting the pitch housing, a lead-lag damper positioned between the flexible beam member and the pitch housing, and the flexible beam members each having a flexible plate portion which is of a low bending rigidity in a flapping direction, a flexible portion provided radially outwardly of the flexible plate portion having a low bending rigidity in the lead-lag direction, and a twist-flex portion provided radially outwardly of the flexible portion.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: July 20, 1993
    Assignees: Kawasaki Jukogyo Kabushiki, Japan as Represented by Director General, Technical Research & Development Institute, Japan Defence Agency
    Inventors: Keizou Yamamoto, Takahiro Ichihashi, Kanehiro Hanayama, Shunichi Bandoh, Asao Kakinuma, Tadashi Wakatsuki