Patent ID: 8210993
Filing Date: 2012-07-03
Classification: A63B

Abstract:
1. An elliptical exercise apparatus comprising: a frame unit including a base frame; a crank wheel unit disposed on said frame unit and including two crank arms; two link units disposed respectively on left and right sides of said frame unit, each of said link units including a pedal rod connected pivotally to one of said crank arms, a pedal plate disposed on a rear end portion of said pedal rod, a handle connected pivotally to said frame unit, and a link rod connected pivotally to said pedal rod and said handle; and an adjustment unit including a motor mounted on said frame unit, a threaded rod connected drivenly to said motor, a pull unit connected pivotally to said frame unit and connected drivenly to said threaded rod, and two roller sets connected pivotally to and disposed respectively on left and right sides of said pull unit, each of said roller sets being mounted on and being disposed in rolling contact with said pedal rod of a respective one of said link units, said roller sets being limitedly movable toward or away from an axis of rotation of said crank arms by a pulling action of said pull unit; wherein each of said roller sets includes a roller support connected pivotally to one of said left and right sides of said pull unit, at least one supporting roller connected to said roller support, and a limiting roller connected to said roller support and spaced apart from said supporting roller, said pedal rod of each of said link units extending through one of said roller sets between said supporting roller and said limiting roller; wherein said pedal rod has a front end portion opposite to said rear end portion and connected pivotally to one of said crank arms, and an intermediate portion between said front and rear end portions, said handle having a bottom end portion, said link rod having two opposite ends connected pivotally and respectively to said bottom end portion of said handle and said intermediate portion of said pedal rod, said intermediate portion of said pedal rod extending through the respective one of said roller sets between said supporting roller and said limiting roller.