Patents by Inventor Akito Kubota

Akito Kubota 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).

  • Method of manufacturing louver fins for use in heat exchanger
    Patent number: 4034453
    Abstract: A method for producing louver fins for use in a heat exchanger, comprising the steps of forming in a sheet of thin fin blank a plurality of cylindrical collars in each of which a heat conductive tube is inserted, forming a plurality of bridge-shaped protruded louvers in parallel with the rows of cylindrical collars, inserting pilot pin in one of the cylindrical collars for predetermining a transverse width of the louver fin by measuring from the cylindrical collar, and cutting the blank sheet into the predetermined transverse width for obtaining a multiplicity of fin louvers with the predetermined width from the blank sheet.
    Type: Grant
    Filed: August 17, 1976
    Date of Patent: July 12, 1977
    Assignee: Hitachi, Ltd.
    Inventors: Syuuji Tomita, Yosihiro Miura, Akito Kubota