Mark D Reynolds

US Patent:

20080032835, Feb 7, 2008

Filed:

Aug 3, 2007

Appl. No.:

11/833856

Inventors:

Mark A. Reynolds - San Jose CA, US

International Classification:

F16H 59/00

US Classification:

474 80

Abstract:

A multiple sprocket chain guide includes a guide structure mounted onto the movable metal cage of a conventional front bicycle derailleur such that the entire guide structure moves between inner and outer gear positions with the movable cage. The guide structure includes opposing outer and inner guide plates and a bridge that is rigidly connected between the guide plates to define a chain guide channel for directing the bicycle's chain onto a selected front sprocket. When the derailleur is positioned to guide the chain onto the outer front sprocket, the outer guide plate is positioned over the outer bash guard such that a gap there between is smaller than the height of the chain, thereby preventing derailment. When the derailleur is positioned to guide the chain onto the inner front sprocket, the inner guide plate is positioned over an inner plate to prevent derailment in a similar manner.