Patent ID: 7607724

Claim:
An apparatus comprising a support structure movable between an erected position and a collapsed position and comprising a threaded shaft, a first collapsible assembly having a first portion pivotally mounted on the threaded shaft through a first hub, a second collapsible assembly having a second portion pivotally mounted on the threaded shaft through a second hub, at least one of the first and second hubs being threadably engaged to the threaded shaft such that the first and second hubs are relatively movable toward and away from each other through a rotation of the threaded shaft to move the support structure between the erected and collapsed positions, the first collapsible assembly including first and second struts pivotally mounted on the first hub, the second collapsible assembly including third and fourth struts pivotally mounted on the second hub, the apparatus further comprising a first seat pole pivotally connected to the first and third struts, a second seat role pivotally connected to the second and fourth struts, and a seat connected to the first and second seat poles and adapted for the seating of a person thereon.