Patent ID: 8720926
Filing Date: 2014-05-13
Classification: A61G

Abstract:
1. A mobility chair, comprising: a frame having a base portion and axle support flanges extending from said base portion; a first wheel set having first and second wheels axially spaced apart along a first axle axis by a first wheel spacing dimension and secured to said axle support flanges of said frame at respective first and second axles extending outwardly from said axle support flanges along said first axle axis, wherein a first radius of at least one of said first and second wheels defining a first axle height, said first wheel spacing dimension being at least twice said first axle height, and first and second mutually perpendicular axle planes extending through said first axle axis, said first axle plane vertically dividing said chair into front and rear portions; a seat having a base portion with a seating surface defining a seating zone below said second axle plane at which a user sits facing generally forwardly, said seating zone extending rearward of said first axle plane at a position so that said chair is capable of being forwardly pivoted about said first axle axis under only gravitational force when the user leans forwardly while remaining seated at said seating zone, said seat including side walls and a rear wall extending upwardly from a perimeter of said seating zone, said side walls disposed at said axle support flanges with said first and second axles protruding from respective said side walls, wherein said side walls define a seat width dimension of said seat that is only slightly smaller than said first wheel spacing dimension; and a second wheel set having at least one third wheel for limiting rearward pivoting motion of said chair about said first axle axis, said third wheel being positioned rearwardly of said first axle plane and defining a lower third wheel tangent point distal from said first axle plane and contained within a first lower plane that is perpendicular to said first axle plane, said first lower plane extending through a first wheel set tangent point of said first and second wheels at an intersection with said first axle plane.