Wheel lock for a wheelchair
AssigneeSunrise Medical HHG Inc.
InventorJose Angel Otaola Amirola
Life of this patent
Estimating the term…
Abstract
A wheel lock for a wheelchair, where the wheelchair has a rear drive wheel, includes a housing adapted to be mounted on the wheelchair. The housing has two pivot points spaced apart in a forward/rearward direction. A wheel contact arm has a pivot shaft pivotally mounted about one of the pivot points. The wheel contact arm has a wheel engagement edge adapted to contact the rear drive wheel. The wheel lock also includes an actuation lever pivotally mounted about the other of the pivot points, and a linkage connecting the wheel contact arm and the actuation lever. The housing, the pivot shaft, the actuation lever and the linkage form a four bar linkage. Pivoting of the actuation lever causes pivoting of the wheel contact arm to engage the wheel contact edge with the rear drive wheel.
Claims20
A wheel lock for a wheelchair having a rear drive wheel, the wheel lock comprising:
- a housing adapted to be mounted on the wheelchair, the housing having two pivot points spaced apart in a forward/rearward direction;
- a wheel contact arm having a pivot shaft pivotally mounted about one of the pivot points, the wheel contact arm having a wheel engagement edge adapted to contact the rear drive wheel;
- an actuation lever pivotally mounted about the other of the pivot points;
- and
- a linkage connecting the wheel contact arm and the actuation lever;
- wherein the housing, the pivot shaft, the actuation lever and the linkage form a four bar linkage, whereby pivoting of the actuation lever causes pivoting of the wheel contact arm to engage the wheel contact edge with the rear drive wheel.
A wheelchair including a frame, a rear drive wheel, and a wheel lock, the wheel lock comprising:
- a housing mounted on the wheelchair, the housing having two pivot points spaced apart in a forward/rearward direction;
- a wheel contact arm having a pivot shaft pivotally mounted about one of the pivot points, the wheel contact arm having a wheel engagement edge adapted to contact the rear drive wheel;
- an actuation lever pivotally mounted about the other of the pivot points;
- and
- a linkage connecting the wheel contact arm and the actuation lever;
- wherein the housing, the pivot shaft, the actuation lever and the linkage form a four bar linkage, whereby pivoting of the actuation lever causes pivoting of the wheel contact arm to engage the wheel contact edge with the rear drive wheel.
A wheelchair including a frame, a right hand rear drive wheel and a left hand rear drive wheel, a left hand wheel lock and a right hand wheel lock, each wheel lock comprising:
- a housing mounted on the wheelchair, the housing having two pivot points spaced apart in a forward/rearward direction;
- a wheel contact arm having a pivot shaft pivotally mounted about one of the pivot points, the wheel contact arm having a wheel engagement edge adapted to contact a rear drive wheel;
- an actuation lever pivotally mounted about the other of the pivot points;
- and
- a linkage connecting the wheel contact arm and the actuation lever;
- wherein the housing, the pivot shaft, the actuation lever and the linkage form a four bar linkage, whereby pivoting of the actuation lever causes pivoting of the wheel contact arm to engage the wheel contact edge with the rear drive wheel;
- and
- wherein the housing, actuation lever and linkage of each of the left hand wheel lock and the right hand wheel lock are substantially identical.
Dependencies are inferred from the claim text.