Patent ID: 8439442

Claim:
A dynamic seating assembly, comprising: (a) an upper pivot plate secured to a seating portion; (b) a lower pivot plate disposed beneath the upper pivot plate; (c) a pivot bar disposed between the upper pivot plate and the lower pivot plate, the pivot bar pivotally coupled to the upper pivot plate at first and second locations such that the upper pivot plate is moveable with respect to the pivot bar about a first pivot axis, the pivot bar pivotally coupled to the lower pivot plate at third and fourth locations such that the pivot bar is moveable with respect to the lower pivot plate about a second pivot axis that is substantially perpendicular to the first pivot axis; (d) a bottom plate disposed beneath the lower pivot plate, the bottom plate secured to a lower supporting structure; and (e) a pushrod assembly moveably disposed between the bottom plate and the lower pivot plate, wherein the pushrod assembly is moveable between a first position, wherein a portion of the pushrod assembly is engageable with the pivot bar to prevent substantial movement of the pivot bar about the second pivot axis, and a second position, wherein the portion of the pushrod assembly is disengaged from the pivot bar to allow movement of the pivot bar about the second pivot axis.