Stair climbing device

Details Stair climbing device Stair climbing device

2009-08-26

2011-11-22

Shriver, II, J. Allen (Department: 3618)

Motor vehicles

Special driving device

Stepper

C280S005200

Reexamination Certificate

active

08061460

ABSTRACT:
A stair climbing device, adapted for a wheel chair, including at least one climbing element which is adapted to be moved on a circular path so that it can get in contact with the next step of a stair and lift or lower the stair climbing device on the next step. The stair climbing device includes a drive motor for providing a driving force for moving the at least one climbing element on the circular path, wherein the movement of the at least one climbing element on the circular path is carried out with a non-constant rotational speed. A gear transmission assembly is provided between the drive motor and the at least one climbing element which gear transmission assembly is adapted to cyclically vary the rotational speed of the at least one climbing element with respect to the rotational speed of the drive motor.

REFERENCES:
patent: 3198534 (1965-08-01), Porter
patent: 3304094 (1967-02-01), Wenger
patent: 3930551 (1976-01-01), Cragg
patent: 4550924 (1985-11-01), Alber
patent: 4790548 (1988-12-01), Decelles et al.
patent: 4993912 (1991-02-01), King et al.
patent: 5263547 (1993-11-01), Alber
patent: 5579857 (1996-12-01), Abe et al.
patent: 6003624 (1999-12-01), Jorgensen et al.
patent: 6164398 (2000-12-01), Alber
patent: 6328120 (2001-12-01), Haussler et al.
patent: 6336642 (2002-01-01), Carstens
patent: 6386552 (2002-05-01), Bierma
patent: 6484829 (2002-11-01), Cox
patent: 6752400 (2004-06-01), Nakatsukasa et al.
patent: 6805209 (2004-10-01), Hedeen
patent: 6857490 (2005-02-01), Quigg
patent: 6935447 (2005-08-01), Bierma
patent: 7316405 (2008-01-01), Kritman et al.
patent: 7384046 (2008-06-01), Le Masne De Chermont
patent: 7422079 (2008-09-01), Hsiao
patent: 7475745 (2009-01-01), DeRoos
patent: 7654348 (2010-02-01), Ohm et al.
patent: 2003/0051568 (2003-03-01), Liao
patent: 2006/0145433 (2006-07-01), Kim
patent: 2008/0093131 (2008-04-01), Couture et al.
patent: 19912932 (1999-03-01), None
patent: 29721477 (1999-06-01), None
patent: 102004043778 (2005-04-01), None
patent: 7228259 (1995-08-01), None
patent: 0012371 (2000-03-01), None
Office Action Report; JP App. No. 2009-208945; issued Mar. 9, 2010.

Affiliated with

Also associated with

Rating

Stair climbing device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stair climbing device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stair climbing device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4299469