192 clutches and power-stop control – Vortex-flow drive and clutch – With brake
Patent
1987-11-12
1989-08-15
Bonck, Rodney H.
192 clutches and power-stop control
Vortex-flow drive and clutch
With brake
188 2417, B60K 4126, B62L 500
Patent
active
048566292
ABSTRACT:
A pedal actuated caliper brake actuating mechanism for a bicycle having a multi-gear chain drive includes an elongate lever mounted on the bicycle frame for resiliently resisted pivotal movement from a rest position about an axis generally coincident with that of the pedal driven main sproket. The lever is formed with two upwardly facing abutment surfaces closely spaced from opposite sides of the path of movement of the main sprocket teeth along the lower rear quadrant of the sprocket. An arm pivotally mounted at its lower end on the lever carries a horizontal roller at its upper end which projects above and laterally across both abutment surfaces and the sprocket tooth path. A resilient member fixed at one end to the arm carries a plate at its upper end which projects into the sprocket tooth path at an inclination such that the teeth slide past the plate during forward rotation of the sprocket and positively engage the plate and drive it downwardly upon reverse rotation of the sprocket. Downward movement of the plate pivots the arm to shift the roller below a downwardly moving tooth of the sprocket which in turn drives the roller into engagement with the abutment surfaces of the lever to depress the lever. Depression of the lever first actuates a mechanism to frictionally engage the rear sprocket for minimal rotation relative to the frame and then tensions a cable to apply the brake.
REFERENCES:
patent: 3966229 (1976-06-01), Foster
patent: 4030774 (1977-06-01), Foster
patent: 4093261 (1978-06-01), Persson
patent: 4134481 (1979-01-01), Calderazzo
patent: 4260044 (1981-04-01), Foster
patent: 4261449 (1981-04-01), Foster
patent: 4638890 (1987-01-01), Lohman
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