Silent chain

Patent No. 7,972,234

Issued: July 5, 2011
Filed: April 29, 2010
Priority: Sept. 28, 2005 (Japan)

Inventors: Sakamoto; Naoji (Nabari, JP)
Assignee: BorgWarner Inc. (Auburn Hills, MI)

String vibration is reduced without causing friction loss. A silent chain is comprised of a multiple number of link plates, each of which has a pair of tooth portions and pin holes and which are laminated laterally and longitudinally and guide plates which are arranged at outermost positions of the link plates. The link plates and the guide plates are connected by connecting pins. In this construction, some of the guide plates are made heavier than that of other guide plates and are irregularly mixed in a longitudinal direction of the chain. Thus, the natural frequency can be changed in an arbitrary chain span and string vibration may be reduced without causing friction loss.

Reference to Related Applications

This is a divisional patent application of co-pending U.S. application Ser. No. 12/477,242, filed on Jun. 3, 2009, entitled "SILENT CHAIN" which is a divisional patent application of U.S. application Ser. No. 11/535,556, filed on Sep. 27, 2006, entitled, "SILENT CHAIN", which claimed one or more inventions which were disclosed in Japanese application number 2005-281751, filed Sep. 28, 2005, entitled "SILENT CHAIN". The benefit under 35 USC.sctn.119(a) of the Japanese application is hereby claimed, and the aforementioned applications is are hereby incorporated herein by reference.

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