Occupant weight operated chair

Claim 1

An occupant weight operated chair having a seat and a reclining back wherein the force required to recline the back is substantially uniform throughout the range of reclining movement and is controlled by the chair occupant's weight comprising, in combination, a seat formed of a stiffly flexible material having front and rear portions, and a concave upper configuration and a convex lower configuration between said portions, a back having upper and lower portions and a rear exterior surface, a transition connection portion formed of a stiffly flexible material interposed between and interconnecting said seat rear portion and said back lower portion, said transition connection having a concave upper configuration and a convex lower configuration between said seat and back, a support having a front attachment to said seat front portion and a rear pivot located rearwardly of the point of attachment of said seat rear portion to said transition connection portion, a link pivotally mounted on said support rear pivot and affixed to said back lower portion at a fixed predetermined position defining a rear attachment, the dimension between said front attachment to said rear attachment along the configuration of said seat and transition connection being greater than the straight line dimension between said front and rear attachments whereby reclining of said back about said pivot to deform said transition connection and seat rear portion raises said seat rear portion, the chair occupant's weight upon said seat rear portion automatically adjusting the force required to recline said back.