Motor vehicles – Special driving device – Stepper
Patent
1980-10-14
1983-08-30
Mitchell, David M.
Motor vehicles
Special driving device
Stepper
180 922, 180DIG3, 280 522, 280242WC, 280289WC, 280DIG10, 297DIG4, B62B 502
Patent
active
044011784
ABSTRACT:
A stair climbing wheelchair carrier comprising a handle assembly and base, the handle assembly for securing the wheelchair to the carrier, means for securing the handle assembly to the base, the base comprising a pair of spaced endless tracks having climbing lugs on the outside surface thereof, each of the endless tracks entrained around a pair of rollers and passing under the outer surface of a runner, one of the rollers situate proximate one end of the runner, the other proximate the other end, the runner being bent intermediate its ends to form a first portion extending away from one of the rollers and a second portion extending away from the first portion towards the second roller at an angle of between about 125.degree. and about 145.degree. to the first portion, the length of track extending under the second portion and around the roller proximate the second portion being such as to extend over the usual bottom step of a staircase when the carrier is positioned proximate the bottom of the staircase, and the disposition of the first portion of the runner being such as to overlie the surface on which the wheelchair carrier is used whereby the track engaging the surface or stair is fully supported.
REFERENCES:
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patent: 2262352 (1941-11-01), Arnold et al.
patent: 2481402 (1949-07-01), Dederick
patent: 3111331 (1963-11-01), Locke
patent: 3133742 (1964-05-01), Richison et al.
patent: 3146841 (1964-09-01), Locke
patent: 3191953 (1965-06-01), Aysta
patent: 3195910 (1965-07-01), Steiner
patent: 3276531 (1966-10-01), Hale et al.
patent: 3288234 (1966-11-01), Feliz
patent: 4156478 (1979-05-01), Kroeger
Hill Mitchell J.
Hughes Ivor M.
Mitchell David M.
Stair Aid Corporation of North America
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