The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 2015
Filed:
Sep. 01, 2011
Kensuke Sakai, Tokyo, JP;
Kensuke Sakai, Tokyo, JP;
FUJI JUKOGYO KABUSHIKI KAISHA, Tokyo, JP;
Abstract
In an earth electrode apparatus, a cradle having first, second, and third shanks to which first, second, and third earth electrodes can be attached respectively is coupled to a shaft supported by a base. The cradle is coupled thereto in a tiltable manner. If the surface of a workpiece is irregular or inclined, the cradle tilts for balancing with the workpiece to ensure equal contact pressure for the contact of the first, second, and third earth electrodes with the workpiece, thereby offering stable contact irrespective of surface irregularity or inclination. Since a welding current is split to flow into the first, second, and third earth electrodes through respective points of contact thereof with the workpiece, it is possible to reduce current density at each of the points of contact and to avoid heat generation ascribable to conductive resistance at each of the points of contact.