F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
188/107
F16D 65/00 (2006.01) B62L 5/00 (2006.01)
Patent
CA 1267368
ABSTRACT A pedal crankshaft operated actuator for a bicycle brake has a link, chain or strap clutch actuated by a pilot clutch in the form of a spring wrapping the crankshaft. In one arrangment, the actuator is formed by a yoke having a jaw engageable with one side of the crankshaft, a link pivotally connected to the yoke and having a jaw engageable with the other side of the crankshaft, and a pair of light spring coils surrounding the crankshaft and having a bight engaging the link outwardly of the jaw so that rotation of the crankshaft in a reverse direction locks the spring to the crankshaft and causes the jaws of the link and the yoke to seize the crankshaft. The link folds relative to the yoke to enable the assembly to be inserted into the pedal crankshaft housing, until a lever arm attached to the yoke drops through an aperture in the housing. In another arrangement, a light weight spring clutch transmits torque from the crankshaft to the lever upon back pedalling, and reaction from the torque causes the lever to tilt and engage a strap clutch locking the lever to the crankshaft as the braking forces are increased.
507377
Boyd Winnett
Ridout & Maybee Llp
LandOfFree
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