Patent ID: 9005085
Filing Date: 2015-04-14
Classification: A63B

Abstract:
1. A motor-less, leg-powered curved treadmill comprising: a treadmill frame; said treadmill frame supporting a treadmill running surface; said treadmill running surface having a top concave surface, said treadmill running surface being of such a length as compared to the length of said treadmill frame to permit it to assume a required concave upper contour; a means for maintaining said treadmill running surface in said required concave upper contour, said treadmill running surface providing a running surface during exertion of walking or running force upon said upper concave portion of said treadmill surface; said treadmill running surface is maintained in a concave configuration; wherein said means is an array of a plurality of parallel axles extending across said treadmill frame; each said parallel axle of said plurality of parallel axles each having a plurality of staggered roller wheels permanently affixed to said respective parallel axles, wherein when a runner touches said treadmill running surface of said staggered roller wheels with the runner's foot, said roller wheels freely spin under the runner's foot touching said staggered roller wheels, wherein further as the runner increases running speed, said staggered roller wheels spin with more force; wherein further said roller wheels are staggered adjacent to each other with one set of rollers on a respective axle extending partially next to another set of rollers on another respective adjacent axle to minimize respective horizontal and vertical gaps between adjacent overlapping roller wheels created by one descending surface of a respective roller wheel from its apex and one ascending surface of an adjacent respective roller wheel to its respective apex, thereby rattle vibration of said rotating roller wheels against a foot of a runner is minimized; wherein said parallel axles of said motor-less, leg-powered curved treadmill extend out on one side of said frame to end in timing belt pulleys, wherein a timing belt rotates around said timing belt pulleys and engages all said axles such that if only one wheel of said array is turned, all wheels of said array turn.