Patent ID: 7611447
Filing Date: 2009-11-03
Classification: A61H,A63B

Abstract:
1. A leg exercise device having: a rigid base; two first separately sealed variable volume chambers mounted on or partially defined by the base; two second separately sealed variable volume chambers mounted on or partially defined by the base; a volume of fluid less than the combined maximum volume of the first and second chambers being located in each pair of first and second chambers; two first surfaces, each sized and located to receive a respective first part of each of a user's feet and convey compressive force between the first part and a respective first chamber, and two second surfaces, each sized and located to receive a respective second part of each of a user's feet and convey compressive force between the second part and a respective second chamber, and a valve; at least one passageway interconnecting each of said chambers with said valve; said valve having first and second states, wherein: