Stair-climbing apparatus for wheelchair

Land vehicles – Step or abutment ascending type vehicle – With endless track

Patent

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Details

180 82, 180907, 280289WC, 280DIG10, 410 7, A61G 500, B62B 502, B62B 902, B62D 5500

Patent

active

045562296

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. The support includes a frame element pivotal on the support about a horizontal axis transverse to the tracks and a device for securing the frame element to the wheelchair on the support.

REFERENCES:
patent: 4432426 (1984-02-01), Misawa

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