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:
Apr. 29, 1997
Filed:
Oct. 22, 1993
Applicant:
Inventors:
Koichi Haruta, Sodegaura, JP;
Yuichiro Terashi, Sodegaura, JP;
Assignee:
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ; B23K / ;
U.S. Cl.
CPC ...
21912163 ; 21912174 ;
Abstract
A laser beam having a circular cross section is irradiated obliquely with respect to a line vertical to a irradiating surface of material including a metal or by shaping the laser beam through an optical system of an irradiation unit, and then the laser beam having an elliptical shape is irradiated on the irradiating surface to thereby suppress weld defects such as weld cracks in weld joints of a difficult-to-weld material such as aluminum alloy.