Patent ID: 7121831

Claim:
A balance practicing machine having a seat and a drive assembly that imparts a swinging motion in a longitudinal direction to the seat, said balance practicing machine comprising: a seat base attached to the seat; a plurality of transverse shafts provided on an active frame; a plurality of connector links, each said connector link pivotable on one of said transverse shafts and on said seat base so as to provide swinging motion to said seat base around said transverse shafts; a longitudinal shaft provided on a base member and pivotably supporting said active frame so as to provide a pivoting motion to said active frame around said longitudinal shaft; an output shaft provided in said drive assembly that extends from one side of a power source; and a transmission that converts torque from said output shaft into three movements of said seat through said seat base, in the form of a linear motion in a longitudinal direction, a pivoting motion around said transverse shafts, and a pivoting motion around said longitudinal shaft.