| 摘要 |
A treadmill exercising apparatus comprising a generally planar frame equipped with a planar slider bed and head and tail rollers journalled respectively at the head and tail ends of the frame, which rollers are formed from steel and are provided with elastomeric material crowns, over which rollers an endless nylon belt is trained, with the slider bed having a dry canvas top surfacing across which the upper run of the belt rides, and with the frame at its head end being equipped with a cross member in which are threadedly mounted in spaced apart relation a pair of threaded screw members that adjustably support the head end of the frame, with each of said screw members being journalled in its own foot for rotational movement with respect thereto, and with the threaded screw members being coupled together adjacent their upper ends for simultaneous manual operation in the same direction in forward and reverse directions. The screw members shift from an angled position to a substantially vertical position, in firm supporting relation to the treadmill frame, when operated to shift the treadmill frame from horizontal position to the maximum grade effect position.
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