Motorcycle braking linkage

Claim 1

For combination with a motorcycle having a frame, a wheel braking surface, a braking pad, a fluid pressure responsive actuator operable to urge the pad against said surface, and a pivotally mounted brake pedal, the combination comprising a. a mount adapted for attachment to the frame, b. a braking cylinder on the mount and having a pressurized fluid outlet communicable with said actuator and a plunger movable relative to the cylinder to pressurize fluid therein, c. a plunger actuating lever pivotally connected to the mount to swing between retracted position relative to the cylinder and advanced position in which the plunger is moved to pressurize fluid in the cylinder, d. and a crank pivotally connected to the mount, the crank having a first arm with lost motion pivotal connection to said actuating lever, and a second arm with operative connection to said brake pedal, said lost motion connection increasing the mechanical advantage of force transmission from the crank to the actuating lever as the crank is rotated counterclockwise by the pedal to swing the actuating lever from retracted to advanced position, e. said crank defining a pivot axis, said lost motion connection including a guide shoulder and a follower movable lengthwise along said guide shoulder relatively close to said axis as the crank pivots counterclockwise, the guide shoulder and follower respectively located on said crank first arm and on said actuating lever.