Abstract: The wheelchair of the present invention permits a patient to manually rotate handwheels which operate a drive mechanism to selectively propel the wheelchair, raise and lower the wheelchair seat between a standing and a sitting position or raise the footrest for the wheelchair to elevate a patient onto a portion of a wheelchair support seat in the standing position. As the seat moves to a raised position, a front section thereof pivots downwardly relative to a rear section and the rear section is contoured to support the buttocks of a patient.

Abstract: A lightweight, two piece wheelchair wherein both pieces are separable and optionally foldable. The wheelchair is driven manually by rotating a pair of opposed handwheels, one of which is contacted by each of the occupant's hands. When a seat positioning crank is rotated by the wheelchair occupant, a seat raising mechanism is activated which moves the seat from a horizontal sitting position to an inclined but substantially vertical position toward the front of the wheelchair. As the seat is raised, the contour of the seat is altered to provide added comfort for the occupant in the standing position.

Abstract: A lightweight, optionally foldable wheelchair which allows the user maximum control over both travel direction and seat position. The wheelchair is driven manually by an arrangement of drive gears, which are actuated by a drive gear selector and operated by rotating a pair of opposed handwheels, one of which is contacted by each of the occupant's hands. One of four or more different gears may be selected, including a "Forward Only" and a "Reverse Only" gear, which allow travel only in the direction selected. A dual function shift lever supports the drive gear selector and may be activated to disengage the drive gears and engage a seat positioning gear. When the seat positioning gear is engaged, rotation of the handwheels by the wheelchair occupant will activate a seat raising mechanism which moves the seat from a horizontal sitting position to a substantially vertical position toward the rear of the wheelchair.