Patent ID: 9629763
Date: 2017-04-25
CPC Classifications: A61G,B60R

Claim:
1. A rear steer portable wheelchair having: (a) a pair of side frame assemblies each having an upper tube member and a lower tube member and forward and aft sections; and (b) a scissor hinge assembly mounted on the side frame assemblies, which scissor hinge assembly extends from a central position between the side frame assemblies, which scissor hinge assembly is foldable from between an in-use position to a collapsed position, which scissor hinge assembly includes a hinge comprising a pair of geared hinge linkages, and which hinge linkages are configured to allow a locked hinge arrangement; (c) a pair of front wheels with each wheel being attached to the forward section of the side frame assemblies, (d) a pair of rear wheels for steering, with each wheel being attached to the aft section of the side frame assemblies, (e) a pair of collapsible pushing arms that are attached to the side frame assemblies, (f) a pair of arm rests that are attached to the side frame assemblies, (g) a back support means, which is attached to the aft section of at least one of the side frame assemblies; and (h) a seat support that extends above the scissor hinge assembly and between the side frame assemblies; wherein in use the wheelchair is deployed by (i) spreading the side frame assemblies apart to pull the scissor hinge assembly into a locked position and (ii) putting the pair of collapsible pushing arms into a locked in-use position, and further wherein in use the wheelchair is collapsed by (i) pulling a handle proximate the central position of the scissor hinge assembly to release the locked position of the scissor hinge assembly to pull the side frame assemblies together, and (ii) collapsing the collapsible arms from their locked in-use position to a folded out of use position thereby obtaining a collapsed configuration that is compact, readily lifted, and transportable.