Patents by Inventor Hajimu Horiuchi

Hajimu Horiuchi 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 for preventing the discoloration of areas around indentation in spot welding
    Patent number: 4536637
    Abstract: A method for preventing discoloration of the area around an indentation in spot welding is provided in which the weld zone and its surrounding area are masked with a non-oxidizing gas such as argon gas, helium gas, nitrogen gas or a mixture of argon gas and carbon dioxide gas from ambient atmospheric air and spot welding is carried out in the atmosphere of the non-oxidizing gas to prevent the discoloration from occurring at the weld zone of a metal sheet under the influence of heat during spot welding.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: August 20, 1985
    Assignee: Kawasaki Jukogyo Kabushiki Kaisha
    Inventors: Hajimu Horiuchi, Akira Sakaguchi