Stair-climbing apparatus

Details Stair-climbing apparatus Stair-climbing apparatus

2008-01-08

2008-01-08

Nguyen, George B. (Department: 3609)

Land vehicles

Step or abutment ascending type vehicle

With endless track

C180S008200, C180S009320, C180S326000

Reexamination Certificate

active

07316405

ABSTRACT:
An apparatus for climbing and descending stairs or other obstacles has three flexibly connected sections and a pair of crawler belt systems on opposite sides of the unit. Each of the crawler belt systems comprised of three crawler belts are driven by one of a pair of motors that directly drives a pinion that engages two of the crawler belts, one of which then drives the last crawler belt through another pinion. The stair-climbing apparatus also includes a mounting platform for coupling a carrier device such as a wheelchair or a box. In order to provide cushioning and stability for movements from a horizontal surface to an inclined surface and vice versa, shock absorbers are provided between the three sections. A linear actuator is also provided to provide stabilization as well as the ability to raise and lower both the stair-climbing crawler unit as well as the wheelchair, providing three modes of operation including manually wheel driven mode, motor wheel driven mode, and motor crawler driven mode.

REFERENCES:
patent: 3166138 (1965-01-01), Dunn, Jr.
patent: 3288234 (1966-11-01), Feliz
patent: 3529688 (1970-09-01), Bruce
patent: 3869011 (1975-03-01), Jensen
patent: 4401178 (1983-08-01), Studer
patent: 4432426 (1984-02-01), Misawa
patent: 4556229 (1985-12-01), Bihler et al.
patent: 4564080 (1986-01-01), Pagett
patent: 4566550 (1986-01-01), Misawa
patent: 4618155 (1986-10-01), Jayne
patent: 4671369 (1987-06-01), Tiffin et al.
patent: 4771839 (1988-09-01), Misawa
patent: 4794999 (1989-01-01), Hester
patent: 4898256 (1990-02-01), Lehner
patent: 4915184 (1990-04-01), Watkins
patent: 5123495 (1992-06-01), Littlejohn et al.
patent: 5158309 (1992-10-01), Quigg
patent: 5197558 (1993-03-01), Misawa
patent: 5263547 (1993-11-01), Alber
patent: 5395129 (1995-03-01), Kao
patent: 5423563 (1995-06-01), Wild
patent: 5577567 (1996-11-01), Johnson et al.
patent: 6158536 (2000-12-01), Misawa
patent: 6237705 (2001-05-01), Nakatani et al.
patent: 6341784 (2002-01-01), Carstens
patent: 6405816 (2002-06-01), Kamen et al.
patent: 6443251 (2002-09-01), Morrell et al.
patent: 6484829 (2002-11-01), Cox
patent: 6619414 (2003-09-01), Rau
patent: 6857490 (2005-02-01), Quigg

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