Walking exercise apparatus

Claim 1

An improved walking exercise apparatus, .comprising: a main frame consisting of a left upright upright support, a right upright support and a base with its ends connected to the respective bottom ends of said left and right upright supports, said base having a transversely disposed rotary shaft provided thereon; a positive drive means consisting of an upper drive chain wheel and a lower drive chain wheel respectively disposed at the ends of said right upright support, said lower drive chain wheel being coaxially secured with one end of said rotary shaft, said upper drive chain wheel and said lower drive chain wheel each having a section of a drive chain engaging a circumferential rim thereof, said drive chain on said upper drive chain wheel having both ends connected to the ends of said drive chain on said lower drive chain wheel by means of two lath-like rigid connecting elements, one of said connecting elements being cut into two parts at a suitable position, said two parts having fixedly provided therein respective screw rods which are joined and positioned by means of a hollow sleeve fitted thereon, said sleeve having both ends pivotally provided with respective adjusting screws which screwably lock with said screw rods to allow axial pulling or releasing of said positive drive means; a reverse drive means consisting of an upper drive wheel and a lower drive wheel respectively disposed at the ends of said left upright support, said lower drive wheel thereof being coaxially secured with the other end of said rotary shaft, said upper drive chain wheel and said lower drive chain wheel each having a section of a drive chain engaging a circumferential rim thereof, said drive chain on said upper drive chain wheel having both ends connected to the ends of said drive chain on said lower drive chain wheel by means of two lath-like rigid connecting elements which are arranged in a slanting position and a cross relationship, one of said connecting elements being cut into two parts at a middle section thereof, said parts being joined by two connecting strips of a pre-determined length such that a space is defined between said connecting strips for passage of the other of said connecting elements; and two suspension bars respectively, pivotally disposed at the inner sides of said left and right upright supports near their upper ends, said suspension bars being coaxially secured with said upper drive chain wheels of said left and right upright supports respectively to allow forward and rearward pivotal swinging movement, said suspension bars respectively having a foot rest at a bottom end thereof.