Drive system with contoured cavity

摘要

The present invention is an improved drive system for a personal vehicle comprising: a frame with a steerable front wheel and rear wheel connected to a drive axle connected to a crank arm by a drive linkage; a roller rotatably attached to the crank arm; a pedal pivotally attached to the frame having a cavity for receiving the roller; a contoured wear bar carried by the cavity for contacting the perimeter of the roller; a major arch included in the contoured wear bar contacting the roller when the pedal is on a down stroke; a minor arch included in the contoured wear bar for providing additional power when the pedal is near the end of its down stroke; and, a major front slope included in the wear bar for contacting the roller when the pedal is in its upstroke to place the pedal at its highest most position.

主权项

1. An improved drive system for a personal vehicle comprising:
a frame having a steerable front wheel and a rear wheel connected to a drive axle; a crank arm connected to said drive axle by a drive linkage so that when said crank arm rotates, said drive axle causes said rear wheel to rotate thereby providing locomotion; a roller rotatably attached to said crank arm; a pedal pivotally attached to said frame having a cavity for receiving said roller; a contoured wear bar carried by an upper surface of said cavity for contacting the perimeter of said roller; a major arch included in said contoured wear bar contacting said roller when said pedal is on a down stroke; and, a major front slope included in said wear bar for contacting said roller when said pedal is in its upstroke to place the pedal at its highest most position.