Apparatus and method for producing ambulatory motion

Amusement devices: toys – Figure toy or accessory therefor – Having mechanism or manipulatable means to move figure or...

Reexamination Certificate

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C446S330000

Reexamination Certificate

active

06866557

ABSTRACT:
An ambulatory mechanical leg system drives a mechanical leg (100, 21) with a crank (91) to pivot about a pivot axis (102) to produce uniform rectilinear motion at the distal end (41) of the leg (100, 21) during a stride stroke (51) portion of a crank revolution or cycle and then lifts the distal end (41) to fast-return it in a step stroke (61) during the remainder of the revolution to a starting point for the next stride stroke (51). The crank (91), leg (100, 21) and pivot axis (102) sizes and proportional lengths or distances are modeled to an angular profile that produces nearly constant velocity, and mechanical structures maintain nearly rectilinear motion, of the distal end (41) of the leg (100, 21) during the stride stroke (51).

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