Patent ID: 8418274

Claim:
A drain clean-out device of a vacuum drainage system for unclogging a clogged drain, comprising a hollow tubular structure having a first end, a first end portion, a second end, and an exterior surface, a sealing member receiving portion located on the exterior surface of the hollow tubular structure at the first end portion of the structure, and a sealing member mountable on the sealing member receiving portion for creating a seal between the sealing member and the exterior service of the structure and between the sealing member and a clogged drain when the structure, with the sealing member mounted thereon, is positioned over a clogged drain, with the sealing member being in contact with an entrance to the drain or with a surface surrounding the entrance to the drain, the hollow tubular structure being adapted to receive an end portion of a vacuum hose of the vacuum drainage system, the hollow tubular structure having a rim formed at the second end of the structure, the exterior surface of the hollow tubular structure being threaded near the second end of the structure, the device further including a jam nut having a nut wall and a flange extending inwardly from the nut wall, the nut wall having a portion that is threaded for engaging the threaded exterior surface of the hollow tubular structure near the second end of the structure, a washer positioned on the rim of the hollow tubular structure and having a portion that extends inwardly beyond the rim of the structure, a seal created when the flange of the jam nut presses the washer against the rim of the hollow tubular structure when the jam nut is threaded onto the threaded exterior surface of the structure near the second end of the structure sealing between the flange and the rim, and a sealing surface formed on the portion of the washer extending inwardly beyond the rim of the hollow tubular structure for creating a press-fit seal between the sealing surface and a vacuum hose of the vacuum drainage system when the vacuum.