Patent ID: 8007418
Filing Date: 2011-08-30
Classification: A63B

Abstract:
1. A resistance training device comprising: a fluid filled dual volume system having at least one essentially closed end; a slidable piston element designed to produce compression and rarefaction within the separate volumes of said fluid filled dual volume system; Translational motion means extending through said at least one essentially closed end of said dual volume system attached to said slidable piston element for producing the sliding motion of the slidable piston element; at least one valve and one gauge means connected to the fluid filled dual volume system for controlling and monitoring the pressure in the interior of the fluid filled dual volume system; and, a diverter valve connected to said at least one valve for controlling the flow of air from a volume of said dual volume system wherein the air is undergoing compression so as to allow the air leaving the valve to be exhausted into the surrounding atmosphere or to enable it to continue to flow toward at least one valve upstream of a volume of the dual volume system where the air is simultaneously undergoing rarefaction.