Land vehicles – Wheeled – Occupant propelled type
Patent
1996-09-03
1998-03-17
Johnson, Brian L.
Land vehicles
Wheeled
Occupant propelled type
2803041, 280283, 280642, B62B 710
Patent
active
057278024
ABSTRACT:
A wheelchair frame includes a pair of side frame assemblies, a connector connecting the two side frame assemblies, a seat, caster wheel mountings, drive wheel mountings, and a leg rest mounting. Each of the side frame assemblies have an upper frame member and a lower frame member. The upper frame member is pivotally connected at its forward end to the forward portion of the lower frame member and supported at its rearward end by a suspension support member (i.e., shock absorber) connected to the rearward end of the lower frame member. The seat is attached between the upper frame members of each side frame assembly. With this configuration, the upper frame members and the seat are free to pivot about the pivotal connection between the upper frame member and the lower frame member. In operation, the upper frame members and seat "float" up and down on the shock absorber to provide cushioning to the user. With this novel configuration, the drive wheels, caster wheels and the lower frame members remain relatively rigid and therefore maintain stability, wheel alignment and maneuverability of the wheelchair. The invention also includes a foldable embodiment of the suspension wheelchair.
REFERENCES:
patent: 521463 (1894-06-01), Smith-Fraser
patent: 1246721 (1917-11-01), Crawford
patent: 1739260 (1929-12-01), Roe
patent: 2347754 (1944-05-01), Shay
patent: 2365003 (1944-12-01), Reinholz
patent: 2448992 (1948-09-01), Love et al.
patent: 2476769 (1949-07-01), Rideout
patent: 2482827 (1949-09-01), Black
patent: 3223431 (1965-12-01), Gottfried et al.
patent: 3917312 (1975-11-01), Rodaway
patent: 3976152 (1976-08-01), Bell
patent: 4078817 (1978-03-01), Ferguson et al.
patent: 4190263 (1980-02-01), Powers
patent: 4310167 (1982-01-01), McLaurin
patent: 4455031 (1984-06-01), Hosaka
patent: 4572533 (1986-02-01), Ellis et al.
patent: 4641848 (1987-02-01), Ayers
patent: 4861056 (1989-08-01), Duffy, Jr. et al.
patent: 5004259 (1991-04-01), Ayers et al.
patent: 5064211 (1991-11-01), Huttenhuis et al.
patent: 5076390 (1991-12-01), Haskins
patent: 5261684 (1993-11-01), Soto
patent: 5267745 (1993-12-01), Robertson et al.
patent: 5409247 (1995-04-01), Robertson et al.
patent: 5590893 (1997-01-01), Robinson et al.
patent: 5593173 (1997-01-01), Williamson
"CD Your Wheelchair?, Damp It, or Dump It|," CD Cellasto.RTM. Damper, Spronken Orthopedie N. V., Genk, Belgium.
"Shock Absorbers for Wheelchairs," News & Notes, Mechanical Engineering, pp. 37-38, Mar. 1994.
"California Cruzer" (product brochure).
Chu Kevan L.
Garven, Jr. Douglas M.
Everest & Jennings International Ltd.
Johnson Brian L.
Savitt Gary
LandOfFree
Suspension wheelchair and wheelchair frame does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Suspension wheelchair and wheelchair frame, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suspension wheelchair and wheelchair frame will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-951149