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:
May. 27, 1986
Filed:
Sep. 19, 1984
Takenobu Honda, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A main rope is wound round a sheave and a deflector wheel by three turns, and the sectional shape of those rope grooves of the sheave with which the main rope is held in engagement is formed in the shape of circular arcs, whereby the lifetimes of the main rope and the sheave are lengthened, and an enhanced traction ability is attained. Among the grooves of the driving sheave around which the main rope is wound, those except the grooves around which the main rope is wound first and last are shaped so as to afford greater friction at contact therebetween than the frictional contact of the first and last grooves, or the grooves around which the main rope is wound first and last are rendered higher in hardness than the other grooves, whereby the amounts of wear of the respective grooves are equalized to extend the lifetimes of the rope and the sheave and to prevent the pleasant ride of an elevator from worsening.