Silent chain 

Patent No. 7,056,248

Issued: June 6, 2006
Filed: August 28, 2003

Inventor: Butterfield; Roger P. (Trumansburg, NY)
Assignee: BorgWarner Inc. (Auburn Hills, MI) 

A Hybrid Roller/Silent chain that has the wear resistance of a roller chain combined with the noise performance of a silent chain. This is accomplished with the use of bushings that allow increased bearing area for the articulating members of the chain, specifically by allowing load to be transmitted through both the inside and outside diameter of the bushing in the same plane.

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