Patent ID: 7631941

Claim:
An orthopedic chair, comprising: an orthopedic chair frame operably coupled to a seating system, wherein the seating system comprises a fabric having at least one layer (L n ), wherein n=0, −1, −2, . . . −i, wherein n=0 represents the at least one layer (L n ) of a load bearing surface that contacts a load, wherein n=−1, −2, . . . −i, represents successive layers of the underlying at least one layer (L n ) of the load bearing surface, wherein n=−i, represents a bottom underlying layer (L n ) of the load bearing surface, wherein the fabric consists essentially of a polyurethane fiber and a fiber that is chemically different from the polyurethane fiber, and wherein the fabric has been stretched between members of the chair frame so that the fabric's percent elongation approaches but is less than the percent elongation for the Young's Modulus.