Variable riser seating system
OwnerJames R. Macintyreinventor
Life of this patent
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Abstract
The seating section of a seating system is variable in slope between high riser and low riser positions forward ends of the pivotable treads forming a deck surface overlap confronting ends of adjacent treads, and lever arms maintain the treads substantially level irrespective of inclination of the underlying support beams. The arms are pivotable between angular and upright positions and extend between each of the treads and the beams. The forward ends of the treads are supported on support plates mounted on the support beams in a low riser height position of the seating section, and the lever arms support the forward ends of the treads on the support plates in a high riser position of the seating section.
Claims6
A seating section of a seating system, comprising a pair of spaced longitudinal support beams and an occupant supporting deck surface mounted on the beams, the beams having an adjustable inclination to the horizontal and sloping downwardly in a forward direction, means for adjusting the inclination of the beams between a first position and a steeper second position, the deck surface comprising transversely extending treads pivotally mounted at one end thereof to said beams, ends of said treads opposite said one end overlapping adjacent treads, lever arms for maintaining said treads substantially level irrespective of the inclination of said beams, said arms being pivotable between angular and upright positions and extending between each of said treads and said beams, support plates fixedly mounted on said beams each adjacent the one end of the pivotally mounted treads, said opposite ends of said treads being supported solely on said support plates in a low riser height in said first position and said lever arms supporting said opposite ends on said support plates in a high riser height of said second position.
Dependencies are inferred from the claim text.