Patent ID: 9457222
Filing Date: 2016-10-04
CPC Classification: A63B

Claim Text:
1. An elliptical exercise machine comprising: a base support structure adapted to be positioned on a support surface; first and second reciprocating foot supports, each foot support having an end movably linked to the base support structure; first and second guide rails for guiding respective first and second foot supports to provide reciprocal movement of the foot supports; the first and second guide rails each comprising an underside; the underside defining a track surface having first and second end portions and at least first and second arch portions, the first arch portion being positioned at a location between the first and second end portions and having a first radius of curvature, and the second arch portion being positioned at one of the first and second end portions and having a second radius of curvature that is less than the first radius of curvature; a drive assembly with a first drive member and a second drive member; a crank arm extending from the first drive member and the second drive member; and first and second rollers connected to the crank arm and movable along the track surface of the underside of the first and second guide rails, respectively; wherein the track surface includes a third arch portion positioned at an end portion of the track surface opposite the second arch portion, the third arch portion having a third radius of curvature that is less than the first radius of curvature; wherein the second radius and the third radius are the same; and wherein the second radius and the third radius each span 14.0 percent to 25.0 percent of the track surface.