Dynamic support system for a chair to provide a user multiple supported positions

A dynamic support system with enhanced adjustability mounted to a chair to permit a user situated thereon to be supported in one of a plurality of positions, the chair comprising a base frame assembly disposed on a ground surface and comprising a pair of mounting tubes, the dynamic support system comprising:

• a seat assembly coupled to the base frame assembly of the chair and comprising a cushion and a pair of support plate assemblies coupled to opposing sides of the cushion, each support plate assembly in the pair of support plate assemblies comprising a central interface plate coupled to one of the pair of mounting tubes in the chair and disposed between an inner interface plate and an outer interface plate, the central interface plate of each support plate assembly in the pair of support plate assemblies comprising a pair of pivot slots, the inner and outer interface plates of each support plate assembly in the pair of support plate assemblies coupled to the cushion by a pair of bolts extending through the inner interface plate, the pair of pivot slots in the central interface plate and the outer interface plate of each support plate assembly;
• and
• a pair of armrests pivotably mounted to the pair of outer interface plates in the pair of support plate assemblies, each armrest in the pair of armrests configured to pivotably adjust relative to one of the pair of outer interface plates to an elevated position and a folded position;
• wherein the seat assembly is configured to support the user on the cushion and enable slidable adjustments of the cushion between an anterior position and a posterior position as permitted by movement of each pair of bolts within the pair of pivot slots in each support plate assembly in the pair of support plate assemblies.