Motor vehicles – Special driving device – Portable track
Reexamination Certificate
2005-02-22
2005-02-22
Boehler, Anne Marie (Department: 3611)
Motor vehicles
Special driving device
Portable track
C180S009320, C280S005220, C305S191000
Reexamination Certificate
active
06857490
ABSTRACT:
A stair-climbing wheelchair has a pair of track assemblies that can be placed in an operative drive mode to propel the wheelchair along ascending and descending paths of travel relative to an obstacle such as a stairway, curb, or the like. Each track assembly includes a guide member with rollers at opposite ends thereof carrying an endless cleated belt. The guide member is arched between its end sections thereby permitting the endless belt to deflect upwardly between the rollers when the endless belt engages an obstacle such as a step, curb or the like. This permits a smooth gradual transition of the wheelchair onto and/or off the top step of a staircase. Preferably, each track assembly also includes an inclined tail section having a separate endless cleated belt. The track assemblies can also be utilized in connection with remote control and/or unmanned motorized vehicles.
REFERENCES:
patent: 2141421 (1938-12-01), Taylor
patent: 2665175 (1954-01-01), Miller
patent: 2751027 (1956-06-01), McLaughlin
patent: 3191953 (1965-06-01), Aysta
patent: 3231290 (1966-01-01), Wyer
patent: 3276531 (1966-10-01), Hale
patent: 3288234 (1966-11-01), Feliz
patent: 3529688 (1970-09-01), Bruce
patent: 4044850 (1977-08-01), Winsor
patent: 4061199 (1977-12-01), Last
patent: 4077483 (1978-03-01), Randolph
patent: 4155588 (1979-05-01), Danziger et al.
patent: 4401178 (1983-08-01), Studer
patent: 4566551 (1986-01-01), Feliz
patent: 4566707 (1986-01-01), Nitzberg
patent: 5033000 (1991-07-01), Littlejohn et al.
patent: 5158309 (1992-10-01), Quigg
patent: 5335741 (1994-08-01), Rabinovitz et al.
patent: 5338048 (1994-08-01), Medina
patent: 5395129 (1995-03-01), Kao
patent: 5423563 (1995-06-01), Wild
patent: 5577567 (1996-11-01), Johnson et al.
patent: 6003624 (1999-12-01), Jorgensen et al.
patent: 6154690 (2000-11-01), Coleman
patent: 6237705 (2001-05-01), Nakatani et al.
patent: 20030033671 (2003-02-01), Robbins
Boehler Anne Marie
Howson and Howson
LandOfFree
Stair-climbing wheelchair 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 wheelchair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stair-climbing wheelchair will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3486145