Wheelchair safety brakes

Brakes – Vehicle

Patent

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Details

2803041, B60T 104

Patent

active

049879782

ABSTRACT:
A safety brake for use on an invalid wheelchair, specifically for the purpose of making travel up an incline, such as a ramp, easier and safer. When ascending an incline, the user often has difficulty getting a new grip quickly enough to avoid rolling back downhill. The present invention can, at the user's option, be set to permit travel forward only, or backward only. Thus, it permits the user to safely move up an incline either forward or backward without risk of rolling down when changing the grip of the hands. It consists of a somewhat egg shaped (when viewed from the end) cam on a housing, which has longitudinal serrations on both sides to grip the tire, and which housing is rotatably mounted on a core. The core having two cam segments engageable by a spring loaded cam follower which serves to urge the serrations of the housing against the tire of the wheelchair to permit travel in only one direction, depending upon which of the two cam segments the follower is set to engage, at the user's option. The serrations on the housing cam's one side will slide over the tire in one direction while gripping it if it tries to turn in the other direction. This invention will be activated when the brake lever is set in locked position. When the brake lever is released the wheels can rotate in either direction in the normal way.

REFERENCES:
patent: 4589525 (1986-05-01), Phipps et al.
patent: 4887830 (1989-12-01), Fought et al.

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