Suspension wheelchair and wheelchair frame

Details Suspension wheelchair and wheelchair frame Suspension wheelchair and wheelchair frame

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.

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"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).

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