Abstract: An apparatus for moving a wheelchair having a pair of upright rear frame members has a support adapted to engage underneath the wheelchair in an upright condition of same with the chair pivotal on the support between erect and inclined positions. At least two endless tracks on the support carry same and the wheelchair thereon so that the tracks allow the wheelchair to move on an incline. A frame element pivotal on the support about a horizontal axis transverse to the tracks carries a vertically displaceable transverse mount having outer ends respectively juxtaposed with the wheelchair frame members. An adjustment spindle extending along and rotatable about a horizontal axis through the mount ends adjacent the frame members has oppositely threaded ends at the outer ends engaged in respective mounting blocks axially slidable in the outer mount ends and threaded on the adjustment-spindle ends.

Abstract: An apparatus for moving a wheelchair on a flight of steps has a support adapted to engage underneath the wheelchair in an upright condition of same with the chair pivotal on the support between erect and inclined positions. Two or more endless tracks on the support carry same and the wheelchair thereon so that the tracks allow the wheelchair to move over uneven terrain and up and down stairs. A latch is displaceable on the support between a holding position securing the wheelchair in the inclined position and a freeing position permitting the wheelchair to move freely between its positions. A safety device connected to the latch is responsive to the inclination of the tracks relative to the horizontal for blocking the latch from moving into the freeing position when the tracks are inclined at more than a predetermined angle to the horizontal. Thus the wheelchair cannot be released from the support when same is moving on an incline. The latch is provided with a pedal to displace it into the freeing position.