Elevator belt assembly with noise and vibration reducing grooveless jacket arrangement

Abstract

An elevator load bearing assembly includes a plurality of cords within a jacket. The cords are spaced from an exterior surface on the jacket such that the spacing remains generally constant along the length of the belt. The jacket has a smooth, uninterrupted exterior surface for contacting sheaves as the belt moves in the elevator system. A method of making the inventive belt assembly is disclosed. The inventive belt assembly minimizes the possibility for generating an annoying, audible sound and vibration during elevator operation.

We claim: 
     
         1 . An elevator belt assembly, comprising:
 a plurality of cords aligned generally parallel to a longitudinal axis of the belt along a length of the belt; and   a jacket over the cords, the jacket including a generally smooth, uninterrupted exterior surface extending along the entire belt length that is adapted to contact other components in an elevator system as the belt moves, wherein the jacket comprises a waxless polyurethane.   
     
     
         2 . The elevator belt assembly of  claim 1 , wherein the plurality of cords are all of the same construction.