US Patent 7458641 Single frame sling chair

A sling chair includes a back frame member having side rails held in substantially parallel relation by a pair of cross bar members. In one embodiment, the cross bar members are generally curved so as to extend away from the back faces of the side rails, forming a concave back structure which can receive a sling member and, eventually, a seated occupant. The cross bar members are adapted to retain the sling member in secure fashion through upper and lower backrest assemblies, resulting in better support and more efficient assembly. This also facilitates separate provisioning of decorative features to improve the chair's aesthetic qualities.