Patent attributes
A flexible resilient seat back, a chair including the seat back and methods of using the chair. The seat back includes an integral sheet material having rigidity sufficient to maintain its shape absent a deforming force; the sheet material having relatively upper and lower portions considered in a direction from top toward bottom, an area of the sheet material approximately at the juncture of the upper and lower portions protruding more forwardly than the major extent of the upper and lower portions, and the sheet material resiliently flexible permitting limited (controlled) deformation during use generally in a prescribed manner in response to force to bend the upper portion of the sheet material relative to the lower portion in a direction front to back and/or in a sidewise direction while supporting the back of the user. A method using and exercising using the chair with seat back.
