Stair-climbing wheelchair carrier

Details Stair-climbing wheelchair carrier Stair-climbing wheelchair carrier

2008-03-25

2008-03-25

Winner, Tony (Department: 3611)

Land vehicles

Step or abutment ascending type vehicle

With endless track

C180S008700, C180S008200

Reexamination Certificate

active

11176650

ABSTRACT:
An extension/retraction cylinder stops or starts tilting the platform of the stair-climbing wheelchair carrier based on a detection signal from an inclination sensor provided in the crawler drive unit. When the crawler drive unit is detected to be not tilted, the tilting motion of the platform is stopped at an intermediate angle (e.g. 20°) of a maximum preset angle (e.g. 40°). When the crawler drive unit is detected to be tilted, the platform is tilted up to the maximum preset angle, and as soon as the crawler drive unit is detected not to be tilted after tilting, the platform is driven so as to decrease its inclination angle relative to the crawler drive unit. Thus, a comfortable and usable stair-climbing wheelchair carrier can be provided.

REFERENCES:
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patent: 4627508 (1986-12-01), Auer
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patent: 4688813 (1987-08-01), Misawa et al.
patent: 4771839 (1988-09-01), Misawa
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patent: 5197558 (1993-03-01), Misawa
patent: 6237705 (2001-05-01), Nakatani et al.
patent: 0 839 705 (1998-05-01), None
patent: 2551862 (1996-08-01), None

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