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. 19, 1993
Filed:
Aug. 24, 1992
Gary L Dunkle, Wichita, KS (US);
Harper Trucks, Inc., Wichita, KS (US);
Abstract
A hand truck stair crawler assembly having a new and novel stair engaging crawler assembly mounted on a conventional hand truck assembly. The stair engaging crawler assembly includes a pair of spaced, cooperating stair crawler assemblies secured to the hand truck assembly, each having a main roller support assembly with a main roller assembly connected thereto. The main roller support assembly includes a pair of spaced bearing retainer plates secured by a plate connector assembly to the hand truck assembly. The main roller assembly includes a plurality of spaced roller bearings mounted within the bearing retainer plates and having an endless belt member mounted thereon for engagement with stairs for traversing thereof. The roller bearing member is of a special design having a central body portion with outer end belt retaining sections to support the endless belt member having contact and support entirely on a plurality of cooperating roller bearing members.