Patent ID: 6485041
Filing Date: 2002-11-26
Classification: B62K,B62M

Abstract:
A bicycle for recreation, exercise, and transport comprising:a unibody frame having forward, middle, and rear sections wherein said rear section comprises a vertical strut member extending vertically from the rear end of said middle frame section, terminating in a distal vertical strut end portion, a cylindrical frame housing having a passageway mounted on the distal end of said vertical strut for retaining a propulsion sprocket and; a pair of upper separated rear frame bars connected at one end to said cylindrical frame housing and extending downward and rearward at approximately a twenty to fifty degree angle; and a pair of lower rear frame bars separated in parallel extending upward and rearward and each bar connected at one end of the intersection of the rear end of the middle frame section and the bottom end of the vertical strut said upper rear bars and said lower rear bars forming two triangular rear frame sections one on each side and spaced apart for receiving a rear wheel; said rear frame section including a slot for receiving a bicycle wheel axle; a steering member connected to the forward portion of said frame having a front wheel and axle disposed at one end of said steering member and a pair of handlebars and a handlebar support bar adjustably connected to the opposite end of said steering member; a rear wheel connected to the rear frame section, said rear wheel including a rear wheel sprocket, wheel axle and coasting means to allow the bike to coast; a propulsion sprocket rotatably connected to said cylindrical frame housing connected at the top of said vertical strut frame member and having a portion encased within said cylindrical frame housing for rotational movement of said propulsion sprocket; a chain connected between said propulsion sprocket and said rear wheel sprocket; said middle frame section including a right rigid connector pin connected on the right side of said unibody frame and a left rigid connector pin connected on the left side of said unibody frame; a left crank arm and a right crank arm rigidly connected to said propulsion sprocket substantially 180 degrees apart; a right bicycle pedal including a support body having at its front end an elliptical, elongated slot that connects to said middle frame section right connector pin at the front end of said bicycle pedal in an elongated slot, the longitudinal axis of which is parallel to the bicycle pedal body and having a rotatable fastener connected at the rear end portion of said bicycle pedal and to said propulsion sprocket right crank arm; and a left bicycle pedal including a support body at its front end having an elliptical, elongated slot that connects to said left connector pin at the front end of said bicycle pedal support body and having a rotatable fastener connected at the rear end of said left bicycle pedal support body and to said propulsion sprocket left crank arm, said left pedal connected at approximately 180 degrees from said right pedal to said left pedal to said left and right crank arms connected to said propulsion sprocket; whereby said right pedal and said left pedal have coupled forward and backward linear movement at the front of each pedal and the right pedal and the left pedal have circular movement at the rear of each pedal left and right relative to said propulsion sprocket thereby providing a teardrop pedal motion when pedaling said bicycle; said teardrop motion resulting from the combination of linear motion at the front of each pedal and circular motion at the rear of each pedal.