The Gates Corporation

William Fraser Lacy

Andrzej Dec

Shawn Xiang Wu

Min Gao

Yuding Feng

Leslee Brown

Karla J Bier

Jennifer E Pease

Douglas D Schelhaas

Patrick Joseph McNamee

Guogong Chen

Kevin Ward

Cindy Cookson

Justin Paulsen

Charlie Ochoa

Cindy Decker

Carol Weber

John Muri

Patrick Joseph Mcnamee

Paul Pearson

Schelhaas Douglas D,

A synchronous belt drive system having: a synchronous belt with a tensile cord of high-modulus fiber such as glass, carbon, PBO, or aramid; a driver sprocket and at least one driven sprocket, at least one of which is an obround sprocket; and a tensioner having: a base having a cylindrical portion extending axially with a radially outer surface and a receiving portion, an eccentric arm pivotally engaged with the radially outer surface, a torsion spring disposed within the receiving portion, the torsion spring applying a biasing force to the eccentric arm, and a pulley journalled to the eccentric arm. Preferably, no one of the eccentric arm, pulley, or torsion spring is axially displaced along an axis A-A from the others. The obround sprocket has a toothed surface and at least one linear portion disposed between two arcuate portions having a constant radius, the linear portion having a predetermined length.

Synchronous belt drive system

A synchronous belt drive system comprising a first obround sprocket having a toothed surface and at least one linear portion disposed between two arcuate portions, the arcuate portions having a constant radius, the linear portion having a predetermined length, a sprocket having a toothed surface, the sprocket engaged to the first obround sprocket by an endless toothed member, and the first obround sprocket having a magnitude and a phase such that an angular displacement timing error between the sprocket and the first obround sprocket is less than 1.5 degree peak to peak.

Growing community of inventors

Westland, MI, United States of America

William Fraser Lacy