Patent ID: 7234775

Claim:
A seat assembly comprising: (a) a seat; (b) a backrest; and (c) a mounting assembly mounting said seat in a near horizontal orientation for balanced movement along an upwardly concaved arcuate seat path having a center of curvature above the seat and forward of the backrest, said mounting assembly further mounting said backrest in a near vertical orientation for balanced movement independently of said seat along a forwardly concaved arcuate back path having a center of curvature above the seat and forward of the backrest; wherein said mounting assembly includes a pedestal, a U-shaped frame mounted to the pedestal with a pair of upwardly extending frame arms, a U-shaped seat support cradle pivotally mounted between said frame arms from proximate a top of said frame arms and downwardly depending therefrom, said seat being carried by said seat cradle for pivotal movement relative to said frame arms, and said mounting assembly further including a U-shaped back support assembly pivotally mounted to said frame arms and extending rearwardly thereof, a biasing assembly biasing the back support assembly to a near horizontal orientation, said backrest being mounted to said back support assembly.