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:
Jul. 01, 1997
Filed:
Sep. 29, 1995
Harvey J Kallenberger, Wind Lake, WI (US);
Harnischfeger Corporation, St. Francis, WI (US);
Abstract
Heavy machinery comprising a lower support structure having an upper surface, and an upper structure having a generally horizontal lower surface facing the upper surface of the lower structure, the upper structure being supported above the lower structure for rotation relative to the lower structure about a generally vertical axis, and the lower surface of the upper structure having therein an upwardly extending recess surrounding the axis to provide space for a person working on the machinery, the recess being defined at least in part by an upper wall above and generally parallel to the lower surface, and by a plurality of generally planar facets surrounding the axis, each of the facets extending transversely to the upper wall and to the lower surface.