Patent ID: 7794376
Filing Date: 2010-09-14
Classification: A63B

Abstract:
1. An exercise machine for exercising abdominal muscles comprising: a base supporting said machine on a relatively flat surface including a rear part, center part and a front part, said rear part having two feet engaging said flat surface and an elevated center portion, said front part being lower than said rear part having either a bar directly engaging said flat surface or a bar with one or more feet engaging said floor, said center part including a diagonal member running from a top end proximal to said elevated center portion of said rear part to said front part, said seat being attached to said diagonal member at approximately a middle point of the diagonal member, and a backrest attached to said diagonal member at the top end of the diagonal member that is proximal to the elevated center portion of the rear part of the base; a pivot member attached to said diagonal member at a pivot point, said pivot member having a front part including a set of foot bars and a mounting for a removable weight, said pivot member also having a rear part with a mounting for a removable counterweight; a generally horizontal chest push member located above said seat and pivotally attached to said rear part of said base and also mechanically coupled through a force-multiplying linkage to said pivot member; wherein pushing on said chest push member causes said pivot member to pivot so that said foot bars pivot upward, and wherein said force-multiplying linkage is adjustable to provide a plurality of different force ratios.