Patents by Inventor Hisao Nakao

Hisao Nakao 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).

  • Filter press
    Patent number: 4512889
    Abstract: A filter press of the type having a multiplicity of filter plates adapted to be sequentially separated from one another, one or more at a time, to allow removal of cakes from filter cloths between each two adjacent plates. A pair of filter cloths covering the opposed surfaces of each two adjacent plates are supported by support means adapted to allow up and down movement of the cloths between the two plates when separated from each other. Drive means for moving the cloths upwardly comprise a filter-cloth suspension-bar driving mechanism adapted for ready engagement with and disengagement from a filter-cloth suspension bar to which are secured the upper ends of the cloths.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: April 23, 1985
    Assignee: Ishigaki Kiko Co., Ltd.
    Inventors: Ichiro Noda, Yasuhiro Suekane, Hisao Nakao
  • Filter press
    Patent number: RE32635
    Abstract: A filter press of the type having a multiplicity of filter plates adapted to be sequentially separated from one another, one or more at a time, to allow removal of cakes from filter cloths between each two adjacent plates. A pair of filter cloths covering the opposed surfaces of each two adjacent plates are supported by support means adapted to allow up and down movement of the cloths between the two plates when separated from each other. Drive means for moving the cloths upwardly comprise a filter-cloth suspension-bar driving mechanism adapted for ready engagement with and disengagement from a filter-cloth suspension bar to which are secured the upper ends of the cloths.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: April 5, 1988
    Assignee: Ishigaki Koko Co., Ltd.
    Inventors: Ichiro Noda, Yasuhiro Suekane, Hisao Nakao