Method of reinforcing and adjusting a contoured seat cushion

A method of supporting a person in a seated position on a resilient seat cushion, the person having a pelvic area with bony prominences;

• the method comprising:
• positioning the person on a support contour defined by a seat support structure of the seat cushion, the seat support structure formed of resilient flexible material, the seat support structure comprising generally transversely spaced and longitudinally extending longitudinal sides and generally longitudinally spaced and transversely extending transverse sides, the sides intersecting one another at corners, and an upper surface extending between the sides and defining the support contour, the support contour including a cavity portion to receive the pelvic area of the person in the seated position, the cavity portion of the support contour including relief areas at locations adjacent to skin covering the bony prominences of the pelvic area of the person positioned on the seat support structure and also including support areas adjacent to skin covering tissue masses spaced from the bony prominences, the support areas and the relief areas spaced relatively more toward and relatively more away from the tissue masses and the bony prominences, respectively;
• the seat support structure also including a support member located at a corner adjacent to the cavity, the support member having relatively less resilience than the seat cushion;
• positioning the seat support structure with the support areas at locations adjacent to the tissue masses and with the relief areas at locations adjacent to the bony prominences;
• restraining the resilient seat support structure and the support areas of the support contour against outward deformation away from the pelvic area by retaining the support member to at least one of the longitudinal or transverse sides of the seat support structure at a retaining position spaced from the corner where the support member is located;
• establishing a retention length between the support member and the retaining position;
• and
• pivoting the support member about a relatively stationary pivot point by adjusting the retention length;
• and
• changing the shape of the support contour in the cavity at a location adjacent to the corner where the support member is located by pivoting the support member upon adjusting the retention length.