| 摘要 |
A motor-less leg-powered curved treadmill produced that allows people to walk, jog, run, and sprint without making any adjustments to the treadmill other than shifting the user's center of gravity forward and backwards. A closed loop treadmill belt running between front and rear pulley rollers is formed with a low friction running surface of transverse wooden, plastic or rubber slats attached to each other in a resilient fashion. Since an essential feature of treadmill is the concave shape of the running surface of belt in its respective upper portion, to insure that this shape is maintained during actual use. This prevents the lower portion of the treadmill belt from drooping down (i.e., it must be held taut), to prevent the concave top portion to be pulled taut into a flat shape between the front and rear pulley rollers. |
| 主权项 |
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 an upper concave portion of said treadmill surface; wherein said means for said treadmill running surface is maintained in a concave configuration is a plurality of transverse parallel slats forming a continuous closed loop treadmill belt suspended by a pair of pulleys set apart horizontally; said continuous closed loop treadmill belt having a lower concave portion forming a lower concave contour, wherein said belt forms a slackened drooping catenary curve; wherein said closed loop treadmill belt is a closed loop array of said plurality of transverse parallel slats; wherein each said transverse slat is made of a material with sufficient resiliency and strength and weight to lie on and conform to a concave row of upper support peripheral bearings located at each peripheral side of said upper concave portion of said treadmill frame of said motor-less, leg-powered curved treadmill, wherein each said transverse parallel slat includes a plurality of fins descending downward from each said slat, each said fin of each said slat extending perpendicular down from each said slat, and each said fin being spaced apart from along a width of the slat, and parallel to, each adjacent fin of each said slat. |
