Patent ID: 7100983

Claim:
A lumbar flexing, buttocks seating apparatus comprising: (a) a buttocks seat; (b) a base; (c) a block affixed to an upper face of the base; (d) a ball socket defined by the block, the socket being open to a top of the block; (e) a ball disposed in and confined to the socket; (f) a threaded post projecting from the ball outwardly through the socket opening, the post being axially rotatable and tiltable about its ball over a range; (g) a bracket threadably engaged on the post and affixed to the underside of the seat for supporting the seat on the post, the seat squarely facing upright when the post is vertical; (h) a hand wheel affixed to the post for rotating the post relative to the bracket and the base to selectively raise or lower the seat relative to the base; and (i) a resilient bias for urging the post to be vertical unless a seated user flexes his or her lumbar with sufficient force to overcome the bias.