A - Human Necessities – 61 – G
Patent
A - Human Necessities
61
G
280/34
A61G 5/02 (2006.01) B62M 1/14 (2006.01)
Patent
CA 1123868
ABSTRACT OF THE DISCLOSURE There is disclosed a self-propelling and steering attachment for a wheel-chair, of the type having larger diameter rear wheels and smaller diameter front swivel wheels. The attachment can be installed and removed by the user while remaining seated in the wheel-chair. The attachment comprises a sleeve, a steering post rotatably supported by the sleeve, a ground-engaging steering and propelling wheel carried by the lower end of the steering post, a crank mechanism carried by the top end of the steering post, a power transmission connecting the crank and the steering and propelling wheel, a framework which is quickly connect- able to, and disconnectable from, the front frame portion of the wheel- chair, and a pair of superposed longitudinally-extending bars inter- connecting the framework and the sleeve. The upper bar is rigid with the sleeve at one end and pivots relative to the framework at the other end. The lower bar is pivotally connected to the sleeve and the framework and is extensible and retractable, being provided with a locking pin to lock this bar to a retracted, adjusted length. For installation of the attachment, the user first rigidly connects the framework to the wheel-chair front frame portion, while the locking pin is removed, then he pushes forwardly on the crank mechanism or on the upper portion of the steering post to cause the latter to attain a more upright position, therefore causing the front swivel wheels of the wheel-chair to raise off the ground. With this movement, the lower bar has retracted and the user then inserts the locking pin to lock the lower bar in retracted position. The resultant assembly behaves like a tricycle, including the two larger diameter rear wheels of the wheel-chair and the front-propelling and steerable wheel of the attachment. For removing the attachment, the user first pushes forwardly on the crank mechanism to release the lock pin, which can then be removed, whereby the front swivel wheels are lowered onto the ground, and then the framework can be removed from the wheel-chair front frame portion. The attachment may be installed on foldable or rigid wheel-chairs and on wheel-chairs of different widths.
346459
Boivin Bernard
Lesperance Pierre
LandOfFree
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