Mobile rocking wheelchair with position locking means

Claim 1

A mobile rocking wheelchair, comprising: a mobile base support unit said unit including an H-shaped frame having a pair of outer wheel support members and a cross support member connecting said pair of wheel support members, each of said wheel support members having a pair of substantially identical wheels mounted thereto; a single pedestal mounted on said unit H-shaped frame cross support member and having substantially parallel four bar linkage assembly means mounted thereon for providing a rocking motion to a chair unit mounted on said assembly means, including a fixed support frame mounted on said assembly means with said chair unit mounted thereon, said assembly means including a first fixed frame bar mounted onto said pedestal and three pairs of interconnected pivotable bars mounted on opposite sides of said frame bar to provide said rocking motion, a first and second pair of said interconnected bars are mounted at one end to said frame bar and the third pair of bars is interconnected to the second ends of said respective first and second pair of bars, said support frame being unitarily mounted by a chair support bar onto said third pair of bars, said first pair of bars having a length substantially shorter then said second pair of bars and said second pair of bars having a length substantially shorter than said third pair of bars and said frame bar having a length greater than the lengths of said first, second and third pair of bars; and locking means for locking said chair unit into a non-rocking position.