Patent ID: 9433545
Filing Date: 2016-09-06
CPC Classification: A61G

Claim Text:
1. A wheelchair provided with an auxiliary drive device for hands-free propulsion of the wheelchair, comprising: at least one chair frame, the auxiliary drive device having laterally arranged drive wheels, which are connected to a wheel shaft and rotatable about a wheel axis, a seat arranged between the drive wheels, a pair of auxiliary wheels disposed beneath the seat for supporting the weight of a user carried on the seat and spaced apart from the drive wheels, wherein a seating area of the seat is arranged to be tiltable about a tilting axis that extends in a direction that is transverse to the wheel axis of the drive wheels, the tilting axis of the seat being in a middle between the driving wheels and above the wheel shaft; and wherein the seat is connected to the wheel shaft of the drive wheels by lever joints, tooth rack drives or gear drives, such that movement of the wheelchair in a first direction is effected by tilting the seat in a tilting direction that is transverse to the first direction of movement of the wheelchair.