Patents by Inventor Kazuhisa Ichimoto

Kazuhisa Ichimoto 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).

  • Horizontal multi-cylinder rotary compressor
    Patent number: 5314318
    Abstract: A plurality of vane chambers on the back side of vanes are caused to function as pump chambers using the reciprocating movement of the vanes to pressure-feed a lubricating oil to a compressor mechanism unit. A taper hole at one of the vane chambers for drawing the lubricating oil, a hole on another chamber for mitigating back pressure and a taper hole between the chambers are provided to improve the pressure feeding capability. In addition, the lubricating oil having been supplied to the compressor mechanism unit is supplied to the slide surfaces of crank portions from an oil hole of each crank portion through an oil passage at the center of the rotating shaft and is further distributed optimally to slide bearing portions by oil guide grooves.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: May 24, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Hiroaki Hata, Kazuhisa Ichimoto, Kazunori Morita, Junichi Fukayama