US Patent 11260711 Connection device, connection system and tractor-trailer combination

A connection device for connecting of electrical and pneumatic lines between a tractor and a trailer having a first end, a second end, and at least two lines connecting the two ends, wherein at least a first pneumatic plug element and at least a first electrical plug element is arranged at the first end and wherein a first plug-in unit is arranged at the second end, having at least a first pneumatic connecting element and at least a first electrical connecting element.