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:
Jun. 06, 1989
Filed:
Jun. 02, 1988
David A Boatwright, Columbia, SC (US);
Robert Duncan, Fork Township, Lexington County, SC (US);
Kenneth K Klapper, Columbia, SC (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A welding apparatus has a welding chamber with an access opening allowing passage of a cladding tube end fitted with an end plug to a welding position therein. A rotatable end plug stop assembly disposed in the chamber and axially aligned with the access opening is adapted to engage the end plug when inserted in the welding chamber. An end of a electrode of a girth welding assembly disposed in the welding chamber adjacent to the rotatable end plug and tube end and in generally orthogonal relation thereto is operable to form a girth weld circumferentially joining the end plug and cladding tube end. An end seal welding assembly mounted to the end plug stop assembly and having an electrode with an end disposed adjacent to and in axial alignment with an axial bore of the end plug is operable to form an end seal weld therein. The end seal welding assembly also defines a path for flow of a fill gas along the electrode and both into the welding chamber and the end plug axial bore before formation of the end seal weld therein. The end plug stop assembly includes an end stop which receives an end seal welding electrode and flow of fill gas along the electrode, and an end plug-engaging insert adapted to fit in the end stop and engage the end plug leading end portion.