BICYCLE DRIVES
First Claim
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1. A device for driving the driven chain of a bicycle, said device comprising a rotatably mounted sprocket wheel for engaging said chain, crank arms mounted on opposite sides of said sprocket wheel to rotate about the same axis as said sprocket wheel, and resilient means connecting said crank arms and sprocket wheel.
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Abstract
A bicycle in which the pedals drive the sprocket wheel through intermediate spring means so as to provide drive from energy stored in the springs at dead center positions.
9 Citations
2 Claims
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1. A device for driving the driven chain of a bicycle, said device comprising a rotatably mounted sprocket wheel for engaging said chain, crank arms mounted on opposite sides of said sprocket wheel to rotate about the same axis as said sprocket wheel, and resilient means connecting said crank arms and sprocket wheel.
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2. A device as claimed in claim 1 in which said crank arms extend in opposite directions, and said resilient means are coil springs compressed between projections on said sprocket wheel and crank arms.
Specification
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Current AssigneeKunio Uchino
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Original AssigneeKunio Uchino
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InventorsUchino, Kunio
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Primary Examiner(s)Gerin, Leonard H.
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Application NumberUS05/360,038Time in Patent Office456 DaysField of Search74/243PC,411US Class Current474/156CPC Class CodesB62M 1/105 using elastic elements
