Wheeled conveyance
OwnerWilliam David Steadmaninventor
Life of this patent
Estimating the term…
Abstract
A wheelchair having a track along which front wheels are slidably moveable between a conventional forward position and a rearward position in which the conventional rear wheels are lifted off the ground thereby to permit the rear wheels to be moved up a curb.
Claims57
A wheeled conveyance, the conveyance (10, 100) comprising a first main wheel arrangement (12, 112) which is located towards a rear of the conveyance (10, 110), characterised in that the conveyance (10, 110) also comprises a second wheel arrangement (24, 124) slidably movable between a first position in front of the main wheel arrangement (12, 112) and a second rearward position wherein the second wheel arrangement (24, 124) and is lower than the first wheel arrangement (12, 112) the first wheel arrangement is spaced from a support surface engaged by the second wheel arrangement.
A wheel chair comprising:
- a) a seat and frame assembly including a main frame and a rearwardly mounted seat;
- b) a spaced pair of rear wheels rotatively mounted on the frame near opposite sides of the seat;
- c) a spaced pair of auxiliary wheels mounted on a forward portion of the main frame;
- d) an auxiliary frame pivotally connected to the main frame and defining a pair of spaced tracks;
- e) a pair of front wheel assemblies respectively moveably supported by the tracks for movement between a forward position and a rearward position;
- and,
- f) the seat and frame assembly being supported by the front and rear wheels when the front wheels are in the forward position and by the front and auxiliary wheels when the front wheels are in the rearward position.
Dependencies are inferred from the claim text.