US Patent 7883143 Collapsible portable child seat

A collapsible chair has an inner frame with multiple inner cross members configured in an X structure, an outer frame with multiple outer cross members configured in an X structure, a surface coupled to the inner frame and the outer frame, and a seat support extending downward from the surface and configured to support a child. The multiple inner cross members configured in an X structure each have a first inner brace member pivotally connected to a second inner brace member. Similarly, the multiple outer cross members configured in an X structure each have a first outer brace member pivotally connected to a second outer brace member.