Patent ID: 7387404

Claim:
Protective tubular light with multi-part covers ( 60 , 70 , 80 ), consisting of a transparent light tube ( 10 ), a lamp ( 13 ) positioned therein, and a lamp support ( 11 ) whose mountings ( 12 ) support the lamp ( 13 ), such that the multi-part covers ( 60 , 70 , 80 ) tightly seal the light tube ( 10 ) at both ends and consist of an outer cover part ( 60 ) installed on the light tube ( 10 ), an inner cover part ( 80 ) which meshes into the outer cover part ( 60 ) and exhibits a threaded part ( 81 ), and an adjusting ring ( 70 ), which is mounted onto the threaded part ( 81 ) and whose cams ( 71 ) engage with the threaded part ( 81 ), and such that axial displacement of the inner cover part ( 80 ) relative to the outer cover part ( 60 ) causes expansion of a sealing ring ( 62 ) by a tension cone ( 83 ) so as to cause the sealing ring ( 62 ) to press against the inner wall of the light tube ( 10 ), and such that an electrical connecting cable runs through one of the two covers ( 60 , 70 , 80 ) and is electrically connected to a coupling part ( 40 ) inside the light tube ( 10 ), to which coupling part ( 40 ) mates with a plug part ( 30 ) that is electrically connected to the mounting ( 12 ) of the lamp ( 13 ), wherein the coupling part ( 40 ) is solidly connected to the inner cover part ( 80 ) and the plug part ( 30 ) is solidly connected to the lamp support ( 11 ) and the contacts between the coupling part ( 40 ) and the plug part ( 30 ) align in an axial direction of the light tube ( 10 ) and are positioned in collinear fashion such that the plug part ( 30 ) and the coupling part ( 40 ) can be connected and disconnected by rotation of the adjusting ring ( 70 ).