Patents by Inventor Shigetoshi Jhogan

Shigetoshi Jhogan 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).

  • Friction agitation joining tool
    Patent number: 6915939
    Abstract: A friction agitation joining tool (10A, 10B) includes a rotor (11) having an end portion to be pressed onto at least one of surfaces of joining members (11a, 1b) and a probe (13) to be inserted into a joining portion (3) of the joining-members (1a, 1b), wherein the probe (13) has a diameter smaller than a diameter of the rotor (11). An end face (12) of the end portion of the rotor (11) is formed into a concave surface dented from a periphery of the end face (12) toward a rotational center of the end face (12). The probe (13) is protruded from the rotational center of the end face (12). The end face (12) is provided with a spiral groove (15) or an annular groove (16) surrounding the probe (13). By performing the joining operation with the joining tool (10A, 10B), a joined member with a good joint can be obtained.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: July 12, 2005
    Assignee: Showa Denko K.K.
    Inventors: Takenori Hashimoto, Shigetoshi Jhogan, Yoshitaka Nagano
  • Friction agitation joining tool, friction agitation joining method and joined member manufacturing method
    Publication number: 20040108359
    Abstract: A friction agitation joining tool (10A, 10B) includes a rotor (11) having an end portion to be pressed onto at least one of surfaces of joining members (11a, 1b) and a probe (13) to be inserted into a joining portion (3) of the joining-members (1a, 1b), wherein the probe (13) has a diameter smaller than a diameter of the rotor (11). An end face (12) of the end portion of the rotor (11) is formed into a concave surface dented from a periphery of the end face (12) toward a rotational center of the end face (12). The probe (13) is protruded from the rotational center of the end face (12). The end face (12) is provided with a spiral groove (15) or an annular groove (16) surrounding the probe (13). By performing the joining operation with the joining tool (10A, 10B), a joined member with a good joint can be obtained.
    Type: Application
    Filed: August 29, 2003
    Publication date: June 10, 2004
    Inventors: Takenori Hashimoto, Shigetoshi Jhogan, Yoshitaka Nagano