Land vehicles – Step or abutment ascending type vehicle – With endless track
Patent
1993-04-07
1995-03-07
Hill, Mitchell J.
Land vehicles
Step or abutment ascending type vehicle
With endless track
180 82, 180 930, 180 932, 180907, 280DIG10, A61G 506, B62D 5504
Patent
active
053951298
ABSTRACT:
This invention relates to a wheel chair which is composed of a seat, a track device, a cushion device and an angle-regulate device so as to make the wheel chair can cross over the ditch or go up or down the stairs, when going up the stairs, user must lift the main wheels upwardly so as to make the track assembly contact the ground, then sliding the seat to the front slant part of the guide groove by its rollers, when the wheel chair going up to the last stairs, it can be returned to the horizontal position by means of the cushion device, when going down the stairs, user must slide the seat to the rear slant part of the guide groove, then going down the stairs by means of the track assembly, furthermore when the wheel chair crossing over the ditch, user must move first the seat to rear part of the wheel chair until the front part of the track assembly run over the ditch, then moving the seat to the front part so as to make the wheel chair cross over the ditch.
REFERENCES:
patent: 3231290 (1966-01-01), Weyer
patent: 3869011 (1975-03-01), Jensen
patent: 5158309 (1992-10-01), Quigg
Hill Mitchell J.
Klein David I.
Rosenberg Morton J.
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