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Power transmission drive system

Imported: 24 Feb '17 | Published: 06 Jan '04

John Alan Mohr, Jeffery Dwight Lofgren, Vinod Pius Raju, Travis Ray Toline

USPTO - Utility Patents

Abstract

A drive system comprising a driver pulley, a driven pulley (

22), and a belt (

10). The belt (

10) has a pulley engaging surface (

16) comprised of a plurality of transversely extending self-tracking teeth (

18). The driven pulley (

22) has a non-grooved, crownless belt engaging surface (

24). The material (

20) forming the pulley engaging surface (

16) of the belt (

10) having a relatively low coefficient of friction, and the material (

28) forming the belt engaging surface (

24) of the driven pulley (

22) having a relatively high coefficient of friction.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described by way of example and with reference to the accompanying drawings in which:

FIG. 1 illustrates a synchronous drive belt;

FIG. 2 is a cross-sectional view of a drive belt wound about a pulley; and

FIG. 3 is a side view of a drive belt wound about a pulley.

Claims

1. A drive system comprising a driver pulley, a driven pulley (

22), and a belt (

10), the belt (

10) having a pulley engaging surface (

16) comprised of a plurality of transversely extending teeth (

18) having a self-tracking profile causing the belt to track to only a single path when traveling on a correspondingly grooved pulley, and the driven pulley (

22) has a non-grooved, crownless belt engaging surface (

24), the combination being characterized by:

2. A drive system in accordance with claim 1 wherein the driven pulley (

22) is flangeless.

3. A drive system in accordance with claim 1 wherein the material (

20) forming the pulley engaging surface (

16) of the belt (

10) has a coefficient of friction of not more than 0.45.

4. A drive system in accordance with claim 1, wherein the material (

28) forming the belt engaging surface (

24) of the driven pulley (

22) has a coefficient of friction of 0.45 or greater.

5. A drive system in accordance with claim 1 wherein the driver pulley and the belt (

10) have a dynamic coefficient of friction of 0.20 to 0.45.