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. 26, 1991
Filed:
Sep. 22, 1989
Stephen N Miskin, Sandy, UT (US);
Kurt M Lloyd, Pewaukee, WI (US);
Harnischfeger Engineers, Inc., Brookfield, WI (US);
Abstract
A mast connecting structure is disclosed in which the mast includes a lower end having upper plate connected to the lower end of a mast, and lower plate spaced from the upper plate and connected to a base on which the mast is to be mounted. Tensioned connecting device connect the upper plate and lower plate means together to thereby mount the mast on the base. The connecting may comprise bolts having threaded ends and nuts threaded on the bolts. The bolts have an elongated length sufficient to span the thickness of the upper and lower plate means through which the volts pass plus the distance of the space between the upper and lower plate. The long bolt length increases the volume of the bolt body which results in an increased stress distribution and thereby an increased ability to withstand stress due to impact loading of the connecting structure. The mast end and mast base are preferably held apart at a spaced distance by support device such as spacer tubes positioned between the upper and lower plate and coaxially with the connecting bolts.