Bicycle sprocket chain damper

Endless belt power transmission systems or components – Guard or housing for belt or pulley – Extending along entire length of belt run

Patent

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Details

2803043, B62J 1302

Patent

active

053972759

ABSTRACT:
For damping undesirable whipping of a bicycle sprocket chain, especially of a mountain bike when it is being ridden rapidly downhill over rough terrain, and thereby preventing chain suck, a segment of the return run of the chain extending tangentially forwards from the pitch circle of the idler sprocket towards the pitch circle of the drive sprocket in use, is encased within a tube. The tube is mounted by a bracket to the axle of the idler sprocket, and is loose and slippery enough to permit desirable running of the drive chain, while restraining and preventing undesirable deviations, especially in a vertical plane (i.e., transversally or laterally of the running path of the drive chain). Conveniently, the tube may be a self-recoiling longitudinally split member for ease of installation on the chain, and its bracket can be springly clipped over the conventional mounting structure of the idler sprocket.

REFERENCES:
patent: 599884 (1898-03-01), Wills
patent: 611750 (1898-10-01), Fulford
patent: 650238 (1900-05-01), Gubbins et al.
patent: 1001971 (1911-08-01), McKellar
patent: 1435611 (1922-11-01), Lewis
patent: 3939730 (1976-02-01), Dehaan
patent: 4054063 (1977-10-01), Perrin
patent: 4158402 (1979-06-01), Romans
patent: 4194413 (1980-03-01), Hentze
patent: 4786071 (1988-11-01), Nagano
patent: 4960402 (1990-10-01), Klein

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