Patent ID: 6893052

Claim:
A connecting arrangement for coolant lines, the connecting arrangement comprising: a first coupling piece connectable seal-tight to a first line endpiece; a second coupling piece connectable seal-tight to a second line endpiece; said first and second coupling pieces having first and second bores, respectively, and said first and second bores communicating with said first and second line endpieces, respectively; a single screw joining said first and second coupling pieces so as to cause said first and second line endpieces to communicate with each other via said first and second bores; said first and second coupling pieces having first and second sealing surfaces facing toward each other; a seal unit disposed between said first and second coupling pieces; said seal unit including a plastic cap and a sealing ring seated in said plastic cap; a non-compressible body disposed between said first and second coupling pieces at a distance from said single screw which is so configured that a lever action arises when said single screw is manipulated to draw said first and second coupling pieces toward each other with said lever action leading to a uniform pressing of said sealing ring between said first and second sealing surfaces; said first and second sealing surfaces extending radially and being laterally offset from said single screw on a side of said single screw facing away from said non-compressible body; and, said plastic cap and one of said first and second coupling pieces conjointly defining a latching interface so as to permit said seal unit to be mounted on said one coupling piece so as to place said sealing ring between said first and second sealing surfaces before said single screw is manipulated to draw said coupling pieces and said sealing surfaces toward each other.