Patent ID: 6386324
Filing Date: 2002-05-14
Classification: B66B,D07B,Y10S

Abstract:
A driven traction sheave for an elevator system, the elevator system including a car, a counterweight and a plurality of flat tension members interconnecting the car and the counterweight, each tension member having a width w, a thickness t measured in the bending direction, and a wide polyurethane engagement surface defined by the width dimension of the tension member, wherein each tension member has an aspect ratio, defined as the ratio of width w relative to thickness t, of greater than one, wherein the traction sheave comprises:a plurality of traction surfaces, each configured to receive the wide polyurethane engagement surface of one of the tension members, each traction surface having a profile that is complementary to the wide polyurethane engagement surface of the tension member, the traction surfaces collectively having sufficient traction with the wide polyurethane engagement surfaces to move the car and the counterweight when the traction surfaces receive the wide polyurethane engagement surfaces and the traction sheave is driven.