Patent ID: 7209032

Claim:
A transmission device for motor vehicles for transmitting signals about tire condition variables from a wheel to an electronic evaluating or control unit arranged in an area of a vehicle body, comprising at least one sensor subassembly ( 14 , 15 , 44 ) for the detection of tire condition variable, the at least sensor subassembly being arranged in a wheel mounted rotatably at the body by way of wheel hub ( 3 ), and a coupling device integrated into the wheel hub and composed of a rotor and a non-rotating stator for producing a field coupling, and including field coupling elements ( 20 , 22 , 27 a , 27 b , 29 a , 29 b , 30 a , 30 b , 34 a , 34 b , 39 a , 39 b , 42 , 43 ) arranged opposite each other, isolated by a narrow air slot ( 24 ), wherein the wheel has a tire with a tread area and the at least one sensor subassembly is mounted in the tread area of the tire, wherein a rotating part of a coupling device for establishing an electrically conductive and detachable connection of the sensor device with a non-rotating part of the coupling device is arranged in the vehicle wheel, and wherein an energy supply subassembly ( 13 ′, 44 ) cooperates with the at least one sensor subassembly ( 15 ) stationarily fixed in the tread area of the tire by way of a field coupling ( 16 ) for the energy supply of the measuring device, wherein the transmission of energy occurs in the way of a transponder.