Patent ID: 7270376

Claim:
In a seating apparatus for preventing muscle fatigue and cushioning the spine to increase lordosis in the lumbar spine, the improvement which comprises, in combination: a wedge-shaped cushion having a top and a bottom, whereby the top is substantially planar parallel to a surface upon which the seating apparatus stands, and a bottom which houses two projecting members each in the geometric configuration of a ray whose vertex is at a back portion of the seating apparatus, which abuts a user's back when seated for improving venous outflow from the lower extremities in the sitting position by decreasing venous obstruction at the femoral vein level; and using parameters including a distance measurement for a user's ischial tuberosities to optimize receiving pelvis weight bearing on each of the ischial tuberosities of the involved user by altering the relative orientation of the two projecting members each in the geometric configuration of a ray whose vertex is at the back portion of the seating apparatus.