Patents by Inventor Tusaka Siina

Tusaka Siina 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).

  • Automatic welding with arc striking retry
    Patent number: 4772776
    Abstract: A welding expectation path is taught beforehand, and an operation for striking an electric arc is executed at a point on the path. If the electric arc does not appear, the operation for striking the electric arc is executed at a different point on the path. When the electric arc has appeared, a welding torch is once returned to a welding start expectation point while the electric arc is held, and it performs welding from the welding start expectation point toward a welding end expectation point.
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: September 20, 1988
    Assignees: Hitachi, Ltd., Hitachi Keiyo Engineering Co. Ltd.
    Inventor: Tusaka Siina