Abstract: An electromechanical system for securing a wheelchair to the floor of a transportation vehicle. The system is operable by a wheelchair encumbent or vehicle driver through the use of a multiple position switch which controls a motor actuated tie down hook and a pair of adjustable chocks so that the wheelchair wheels are secured directly to the vehicle floor with the wheelchair remaining in a horizontal position.

Abstract: An improved seat for a wheelchair having a forward section for supporting the occupant's thigh areas and a rearward section hingedly attached to the forward section for supporting the occupant's buttocks area. The rearward section is attached to a linear actuator which moves the rearward section downward such that the occupant is aupported by the forward section of the seat and the back rest of the wheelchair, thus permitting air circulation around the buttocks area and blood circulation in the buttocks region to prevent breakdown of skin and flesh in the buttocks area. An automatic control is provided to periodically lower and raise the rearward seat section without attention of the occupant.