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:
Oct. 09, 2012
Filed:
Sep. 26, 2008
Toru Nakajima, Tsuchiura, JP;
Hikaru Yamamoto, Tsukuba, JP;
Toru Nakajima, Tsuchiura, JP;
Hikaru Yamamoto, Tsukuba, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
In a plate assembling step, a gap () is formed between a leading end portion (A) of a groove () provided on an upright plate () and a lower plate (). An arc is generated from a welding wire () toward a back surface (C) side of the groove () through the gap (), to form a satisfactory penetration bead () on the back surface (C) side of the groove (). Next, the welding wire (), the lower plate (), the groove () of the upright plate () and the penetration bead () are fused to form a first-layer welding bead (), thereby firmly joining the lower plate () and the groove () of the upright plate (). The first and second welding steps are performed continuously after performing the plate assembling step, to enhance workability at the time of welding the lower plate () and the upright plate ().