Patent ID: 6348024
Filing Date: 2002-02-19
Classification: A63B

Abstract:
A tread exercising machine comprising: two parallel symmetrical side walls (10), a plurality of serially arranged steps (20) that may produce predetermined recycling action, and a housing (60) mounted on said two side walls (10), wherein,each of said two side walls (10) has one opposite side pre-fit with a cam groove (11) and a chain guide groove (12) each having a symmetrical track, each of said two side walls (10) has two opposite ends pivoted with a shaft (16), each shaft (16) is respectively secured with a sprocket (17) located adjacent to an inner side of said side wall (10), a chain (30) is mounted between two opposite chain (17), said chain (30) is inserted into said chain guide groove (12) of said side wall (10); each of said steps (20) has two end faces each provided with a protruding shaft (21) and a retaining shaft (22) respectively, said protruding shaft (21) has a free end secured with a bearing (211), said bearing (211) is inserted into said cam groove (11) of said side wall (10) to form a rolling state, said retaining shaft (22) has an end portion combined with said chain (30) at a position with a preset span, said two chains (30) are driven by a driver (40), so that each of said steps (20) produce a predetermined movement with said track of said cam groove (11) and said chain guide groove (12), thereby forming a stepwise slope region (100), and a smooth platform region (110).