Device for driving wheels of wheelchair, has concentric drive ring connected with each drive wheel and pivot provided with handle at end and two friction carriers at another end

摘要

The device has a concentric drive ring (5) connected with each drive wheel. A pivot (1) is provided with a handle (2) at an end and two friction carriers (4) at another end. The pivot and spacer (8) carry or form elements of a rotation angle limiter. The pivot and spacer consist of a catch body (10) and a catch surface or a catch edge. The friction carriers have a cylindrical body, which is made up of a mechanically firm material with good static friction characteristic, e.g. sintered bronze. The friction carriers have a keyway, which is coated with a material, e.g. hard rubber.