Patents by Inventor Yoshinori HOKADA

Yoshinori HOKADA 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).

  • Heat exchanger and manufacturing method therefor
    Patent number: 11054195
    Abstract: A heat exchanger includes a tube expansion portion provided on a heat transfer tube such that an outer peripheral surface of the heat transfer tube is pressed against an inner peripheral surface of a first hole provided in a side wall portion of a case, and a first concave surface portion that is provided in a part of an outer surface of the tube expansion portion and forms a first gap, into which brazing material of a first brazed portion advances, between the outer surface of the tube expansion portion and the inner peripheral surface of the first hole. Thus, the attachment strength of the heat transfer tube can be improved by means of a simple configuration.
    Type: Grant
    Filed: September 23, 2019
    Date of Patent: July 6, 2021
    Assignee: NORITZ CORPORATION
    Inventors: Yoshinori Hokada, Gaku Sato, Hideyuki Fujisawa, Yukiko Kashima
  • HEAT EXCHANGER AND MANUFACTURING METHOD THEREFOR
    Publication number: 20200103182
    Abstract: A heat exchanger includes a tube expansion portion provided on a heat transfer tube such that an outer peripheral surface of the heat transfer tube is pressed against an inner peripheral surface of a first hole provided in a side wall portion of a case, and a first concave surface portion that is provided in a part of an outer surface of the tube expansion portion and forms a first gap, into which brazing material of a first brazed portion advances, between the outer surface of the tube expansion portion and the inner peripheral surface of the first hole. Thus, the attachment strength of the heat transfer tube can be improved by means of a simple configuration.
    Type: Application
    Filed: September 23, 2019
    Publication date: April 2, 2020
    Applicant: NORITZ CORPORATION
    Inventors: Yoshinori HOKADA, Gaku SATO, Hideyuki FUJISAWA, Yukiko KASHIMA