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:
Nov. 20, 2001
Filed:
Oct. 29, 1998
Robert A. Gregor, New Berlin, WI (US);
David S. Austin, Oak Creek, WI (US);
Bucyrus International, Inc., South Milwaukee, WI (US);
Abstract
An excavator base is fabricated on-site by first erecting a substructure of beams on a concrete foundation. Large flat plates are placed on the substructure, welded together at their adjacent edges, and cut at a perimeter to form a bottom plate. A prefabricated center section is welded to the bottom plate. Upright diaphragms and edge plates are assembled on the bottom plate and welded to each other and to the bottom plate. Large flat plates are assembled on the top of the diaphragms, and edge plates, and are welded thereto and to each other. The welded plates are cut at a perimeter to complete a top plate. The base is then removed from the substructure. Alternately, the top plate can be formed on the substructure first and then removed and set aside for later use. Adjacent plates are held flat for welding using brackets and wedges.