Chainguard

Details Chainguard Chainguard

1985-11-14

1987-01-27

Leppink, James A.

Endless belt power transmission systems or components

Guard or housing for belt or pulley

403344, B62J 1300

Patent

active

046392408

ABSTRACT:
A bicycle chainguard having a housing shaped to cover the top run of a bicycle chain with a curved forward end portion extending at least partially around a front sprocket. The housing has a pair of keyhole-shaped through-slots formed in a vertical wall. Clamps encircle seat and down tubes on the frame of the bicycle. Each clamp has a lug extending into a corresponding through-slot. Each lug has a shank with a diameter sized to fit within the through-slot, and an enlarged head sized to pass through an enlarged end portion of the keyhole-shaped through-slot. The longitudinal axis of each through-slot is oriented tranversely to the axis of the corresponding frame tube enabling assembly of the lug in the slot in a wide range of positions along the axial length of the through-slot to accommodate a range of angular orientations of the frame tubes for different model or style bicycles. Preferably, each lug will be off-center on its clamp to extend the range of frame tube angles which can be accommodated by the chainguard.

REFERENCES:
patent: 671816 (1901-04-01), Cooley
patent: 2584788 (1952-02-01), Cich
patent: 4507105 (1985-03-01), Stottmann et al.

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