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A telescopic seating system generally includes an innermost lower riser assembly and successive outer elevated riser assemblies. Each elevated riser assembly includes a dual deck surface and a telescopic leg assembly. Each elevated riser assembly supports a toothed belt drive system which provides t

A telescopic seating system generally includes an innermost lower riser assembly and successive outer elevated riser assemblies. Each elevated riser assembly includes a dual deck surface and a telescopic leg assembly. Each elevated riser assembly supports a toothed belt drive system which provides the interface between each adjacent elevated riser assembly and the motive force to extend and retract the riser system. In operation, electric motors of the toothed belt drive system on each elevated riser assembly are driven by a controller to extend and retract the telescopic seating system between a fully extended position, a half-deployed position and a storage position. The half-deployed position utilizes the dual deck surface to provide half the seating capacity of each riser at twice the rise between each seating row to thereby accommodate particular venues.

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What is claimed is: 1. A telescopic seating riser assembly comprising:a dual deck surface;a telescopic leg assembly attached to said dual deck surface; anda toothed belt drive system mounted to said telescopic leg assembly and including an electric motor that rotates a shaft about an axis to drive a

What is claimed is: 1. A telescopic seating riser assembly comprising:a dual deck surface;a telescopic leg assembly attached to said dual deck surface; anda toothed belt drive system mounted to said telescopic leg assembly and including an electric motor that rotates a shaft about an axis to drive a toothed timing belt in a direction transverse the axis, wherein said toothed timing belt is a continuous belt that engages a first and a second pulley mounted to a horizontal leg of said telescopic leg assembly.