Patent ID: 7201707
Filing Date: 2007-04-10
Classification: A63B

Abstract:
1. An elliptical exercise machine comprising: a frame; at least two crankshafts rotationally connected to said frame; a rail attached to said crankshafts so that said rail traverses a path in conjunction with the rotation of said crankshafts; a footskate capable of reciprocating motion on said rail; an interface arm, said interface arm having a distal and proximal end and a length therebetween, said proximal end of said interface arm being connected to said rail; an inverted pendulum arm having a proximal and distal end and a length therebetween, said inverted pendulum arm rotating about an axis of rotation located toward said proximal end of said inverted pendulum arm; a coupler connecting said distal end of said interface arm to said inverted pendulum arm at a point along said length of said inverted pendulum arm, said distance between said coupler and said first axis defining a first radius; and a transfer arm having a proximal and distal end and a length therebetween, the transfer arm being attached at said proximal end to said inverted pendulum arm, said transfer arm also being connected at said distal end to said footskate, said distance between said proximal end of said transfer arm and said first axis defining a second radius; wherein said interface arm causes said inverted pendulum arm to reciprocate about said first axis, which in turn causes said transfer arm to make said footskate reciprocate on said rail; and wherein said first radius and said second radius are adjustable relative to each other.