Abstract: A sensor arrangement for a wheelchair wheel that has a running wheel with a hub and a hand rim includes a running wheel fastening arrangement that is fastened to the running wheel, a hand rim fastening arrangement that is fastened to the hand rim and at least one sensor that detects a movement of the hand rim fastening arrangement relative to the running wheel fastening arrangement. Two restoring elements are provided on the running wheel fastening arrangement and rest against the hand rim arrangement with a prestressing force at least in the zero position. Both restoring elements rest against at least one stop of the running wheel fastening arrangement in the zero position of the sensor arrangement.

Abstract: An operating- and braking-assistance device for wheelchairs is attachable on the frame of a wheelchair. The device has at least one motorized pinion (15), which is driveable in both directions and which engages on an inner gear (14) that is attachable to the rim (11) of a wheel (10) of the wheelchair.

Abstract: A transporting device has wheels, a stair climbing unit having climbing legs, an electric motor provided for driving of the stair climbing unit, a drive shaft which is driven by the electric motor and is formed as a crank shaft located symmetrically to a central longitudinal axis of the device, the drive shaft having halves each rotatably supporting a first crank for the climbing leg and a second crank for the wheel.

Abstract: A transporting device has a frame, wheels arranged on the frame, and a step climbing unit including an electric motor, first eccentric levers driven by the electric motor, second eccentric levers rotatably supported on the first eccentric levers supports on which the second eccentric levers are rotatably supported and which have lower ends provided with supporting elements, and a transmission provided between the first and second eccentric levers and having a transmission ratio 1:2.