Bicycle Chain Guide
OwnerEric Raymond Twersinventor
Life of this patent
Estimating the term…
Abstract
The present invention reduces or eliminates suspension induced lower portion chain grow for rear derailer equipped bicycle drive trains using a pivoting mount for the common chain guide pulley. Attached about or near concentric with the chain ring and bottom bracket this mounting plate has a pivotally connected link to the suspension. The chain guide pulley is positioned to “take-up” or store some lower portion of chain length around the chain ring. Suspension activation creates pivotal movement of the guide mounting plate to relieve suspension induced chain grow by releasing some or the entire taken-up length of the lower portion of the drive chain.
Claims4
A bicycle comprising:
- a rear suspension, a plurality of cogs concentric to the rear axle, a rear derailer for changing gears and accommodating for differing required chain length and a driven front chain ring;
- to which is attached, concentric with the chain ring, a pivotally connected mounting plate supporting one of a guide pulley, a pulley and guide block or slide and also having the mounting plate linked to the rear suspension by a pivotally connected link.
(canceled)
(canceled)
(canceled)
Dependencies are inferred from the claim text.