Gearwheel Ab

Zafena Ab

Stefan Ericsson

Christian Malm

The present invention relates to a wheelchair wheel attachment and gear change adaptor unit for a geared wheelchair wheel having a hub which comprises an attachment shaft protruding to one side thereof, and where gear change is actuated by axial manipulation of a rod running within the shaft in a cylindrical bore which is concentric with the shaft. An adaptor housing () is designed to receive and support the shaft in an opening (). Locking means are provided for releasably locking the shaft to the adaptor housing () such that the shaft cannot move out from the adaptor housing () until the locking means are released. A gear shift plunger () is arranged for hydraulic activation within the adaptor housing () such as to, upon activation when the wheelchair wheel is attached to the adaptor unit, push the rod outwards of the adaptor housing () towards the hub for effecting gear change in the hub.

Growing community of inventors

Mullsjö, Sweden

Stefan Ericsson