Patent ID: 7651445

Claim:
An elliptical trainer comprising: a base having a bottom frame having a front end and a rear end; and a support mounted on and protruding up from the bottom frame near the front end and having opposite sides; a flywheel mounted rotatably on one side of the support of the base and having an axle mounted axially and securely through the flywheel, mounted rotatably through the support and having two ends; and two cranks securely and radially mounted respectively on the ends of the axle and each crank having an inner end mounted securely on the axle and an outer end; two four-bar linkages pivotally connected respectively on the opposite sides of the support of the base and pivotally connected eccentrically to the flywheel, and each four-bar linkage having a front link mounted pivotally on the support of the base and having an upper end, a lower end and an intermediate pivot formed between the upper end and the lower end and mounted rotatably on the outer end of one of the cranks of the flywheel; a rear link mounted pivotally on the support of the base and having an upper end; a lower end; an intermediate pivot formed between the upper end and the lower end of the rear link and mounted rotatably on the support; and a lower joint mounted securely on the rear link; an upper coupler connected pivotally between the upper ends of the front and rear links; and two lower links connected pivotally to the lower ends of the respective front and rear links, protruding backwards from the lower end of the rear links and having rear ends; two pedals mounted on the rear ends of the respective lower links; and two handle assemblies mounted pivotally on the support of the base and pivotally connected respectively to and corresponding respectively to the rear links.