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. 06, 1992
Filed:
Mar. 14, 1991
John J McGettigan, Middletown Twp., Delaware County, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
Methods and apparatus for milling a flat surface on a large scale assembly, such as the horizontal joint surface of the outer structure of a steam turbine, are disclosed. In a preferred embodiment, lateral and longitudinal drive means are installed on a lower base assembly which is specifically adapted to be mounted and leveled by engaging portions of the structure to be machined. Sliding platforms are engaged with drive means, and a milling head is mounted to the platforms to provide the capability to move the milling head both laterally and longitudinally along the surface to be machined. In a preferred embodiment, the milling head is affixed to a platform that permits indexing the milling head to a position where it may extend beyond the maximum travel of the drive means and thereby machine the corners or otherwise inaccessible areas of the structure.