Design and Development of a Pressure and Cycle Control for Dynamic Seat Cushions

Book excerpt: "The advent of long range aircraft has created a requirement for maximum long term seating comfort. Research and development have evolved an efficient Dynamic Seat Cushion. Successful operation of a Dynamic Seat Cushion depends on close control of air pressure and inflation cycles. Engineering problems in design and development of this close control involve air pressure regulation, manual control, inflation and deflation valving, and cycle timing. The application of this control to aircraft use imposed additional requirements of light weight, small size, and reliability over wide ranges of environment and long term continuous use."--Abstract.