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:
Feb. 21, 1978
Filed:
Sep. 20, 1976
Applicant:
Inventor:
Peter O Harken, Pewaukee, WI (US);
Assignee:
Vanguard, Inc., Pewaukee, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66D / ;
U.S. Cl.
CPC ...
254188 ; 114109 ; 308 18 ; 3081 / ;
Abstract
A plurality of adjacent sheaves are disposed around a common shaft. Each sheave carries a plurality of ball bearings engaged between an inner race of the sheave and the shaft. The ball bearings in one sheave are exposed on one side and bear against an adjacent sheave around the shaft such that friction between a sheave and the shaft and between adjacent sheaves is minimized.