B - Operations – Transporting – 62 – L
Patent
B - Operations, Transporting
62
L
188/109
B62L 1/06 (2006.01) B62L 3/08 (2006.01) B62L 5/00 (2006.01)
Patent
CA 1184859
ABSTRACT A brake system for bicycles includes a clasp type rim brake having a stirrup with arms which are resiliently deflectable so as to clasp shoes against opposite sides of the rim of a wheel upon the stirrup being drawn radially outwards, a powerful clasping action being provided by guides in wedging engagement with portions of the stirrup. The radially outward movement of the stirrup is preferably provided by an actuator operated by a pedal crankshaft of the bicycle, the brake being applied to a rear wheel of the bicycle and a chain drive between the crankshaft and the rear wheel including a lost motion linkage so as to help avoid brake lock-up. Upon pedalling of the bicycle, the lost motion is taken up against a progressive bias applied by a spring. The actuator may also operate a front brake being connected to it by a cable having some resilience, whilst being connected to the rear brake by a rigid link. To further assist in preventing lock-up, the guides may have provision for a limited degree of tangential displacement of the brake stirrup relative to the rim.
410949
Boyd Winnett
Ridout & Maybee Llp
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