Patent ID: 7562893

Claim:
An articulating coupling ( 4 ) comprising: a first pivot articulation ( 12 ) pivotable about a vertical axis, which facilitates only pivotal yaw movement between a motor vehicle ( 1 ) and a trailer ( 2 ), having a disc device ( 40 ) with pivoting friction surfaces for damping the pivotal yaw movement between the motor vehicle ( 1 ) and the trailer ( 2 ), the first pivot articulation ( 12 ) being enclosed within a closed space to seal the first pivot articulation ( 12 ) from incoming pollution; and a second pivot articulation ( 21 ) pivotally coupled to the first pivot articulation ( 12 ) and pivotable about two horizontal axes with respect to the vertical pivot axis of the first pivot articulation, to facilitate only pitch movement and rolling movement between the motor vehicle ( 1 ) and the trailer ( 2 ), the second pivot articulation ( 21 ) being laterally immobilized with respect to the first pivot articulation ( 12 ) in a rigid manner to inhibit play therebetween and to transmit only the yaw movement to the first pivot articulation ( 12 ).