Patent ID: 7857394

Claim:
A wheelchair seat back assembly comprising a seat back and mounting hardware for mounting the wheelchair seat back in relation to wheelchair seat posts, the mounting hardware comprising a tube clamp having inner and outer parts with flats defining a V-shaped geometry, with the inner and outer parts contacting each other at a rear end of the clamp, the tube clamp having a swivel pin engagable with a fastener that fastens the inner and outer parts together, the swivel pin being angularly displaceable to support the fastener at various angles in relation to the tube clamp, the swivel pin together with the flats and V-shaped geometry permitting the tube clamp to fit wheelchair seat posts of various sizes, wherein the clamp forms a third class lever, with the contact between the inner and outer parts forming a fulcrum at a rear end of the clamp, the front end of the clamp applying a clamp force to the wheelchair posts, and the fastener in conjunction with the swivel pin providing an axial load at a position intermediate of the rear end and front end of the clamp, wherein the mounting hardware comprises a mounting pin configured to be mounted in relation to one of the wheelchair seat posts or the seat back and a pin receiver configured to be mounted in relation to the other one of the wheelchair seat posts or the seat back, the mounting pin being structured to be received by the pin receiver to mount the seat back in relation to the wheelchair seat posts; and wherein the pin receiver is supported in relation to a mounting bracket by fasteners that pass through one or more slots in the mounting bracket, the fasteners mounting the pin receiver in relation to the mounting bracket, the slots being oversized to permit the pin receiver to be angularly adjustable in relation to the mounting bracket.