Patent ID: 7992584
Filing Date: 2011-08-09
Classification: A61H

Abstract:
1. A walker comprising: A) a structural assembly having first and second substantially straight elongate members each having lower and upper ends and a spacer member for keeping said first and second elongate members at a parallel and spaced apart relationship with respect to each other; B) first and second supporting elongate base assemblies each including a pad assembly having a bottom surface that selectively comes in contact with a supporting surface, said supporting base assemblies being mounted substantially perpendicularly to said lower ends, each of said base assemblies having forward and rear ends; and C) first and second wheel assemblies mounted to each of the forward and rear ends, respectively, of said first and second supporting elongate base assemblies, each wheel assembly having at least one wheel with a corresponding centrally disposed axle at a cooperative location for said wheels to protrude beyond said bottom surfaces, each of said wheel assemblies further including a retracting assembly for causing said first and second wheel assemblies to retract upon the application of a force of a predetermined magnitude to said structural assembly to urge said bottom surfaces against said supporting surface and said retracting assembly further including a spring housing coplanarly mounted to said forward and rear ends, each spring housing having two opposite guide slots with cooperative dimensions to receive a slidable bushing with a through hole for journaling said axles transversally disposed with respect to the straight elongate base assemblies and the wheels rotate on the axles passed through said slots and a spring member for biasing said bushing so that when said force is below a predetermined magnitude said first and second wheels provide the support for said walker.