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:
Jan. 15, 2002
Filed:
Jan. 03, 2000
Kimio Nakayama, Naka-gun, JP;
Mitsubishi Nuclear Fuel Co., Ltd., Naka-gun, JP;
Abstract
Welding operations on a grid support housed in a welding chamber is carried out using a laser welding apparatus placed outside the welding chamber. In the interior space of the chamber, a pair of supply nozzles 44 are disposed on each of the mutually orthogonal edge sections of two top and bottom glass surfaces of the roughly cubic chamber An inert gas is ejected in a planar stream from the blast slot openings provided on each supply nozzle along the top and bottom glass surfaces and side glass surfaces. The glass surfaces that face many welding sections of the grid support are shielded by the sweeping action in two directions, and the glass surfaces that oppose lesser number of welding sections are shielded by the sweeping action in one direction with the inert gas. Fumes and plasmas produced from welding sections are thus swept away before they can reach the glass surfaces, and are discharged with the spent inert gas.