US Patent 8141944 Collapsible chair having reduced linkages

An apparatus includes a seat frame having an expanded configuration and a collapsed configuration. The seat frame includes a support member and four elongate members. A first elongate member is of a first pole type, a second elongate member is of a second pole type, and a third and fourth elongate member are of a third pole type defined by a length and a shape. Each of the elongate members are pivotably connected to the support member. When the seat frame is in the expanded configuration, the first and second elongate members have a first end disposed at a front portion of the seat frame and a second end disposed at a back portion of the seat frame; and the third and the fourth elongate member have a first end disposed at the back portion of the frame and a second end disposed at the front portion of the frame.