Patent ID: 8408267

Claim:
Connecting piece for a vacuum line and a suction opening, the connecting piece comprising: an essentially cylindrical main body having a first end and a second end, the main body having a through bore extending from a first opening at the first end to a second opening at the second end; an at least partially circumferential first collar at the first end of the main body, the first collar protruding radially inward into the through bore and sized and arranged such that a conduit inserted into the through bore at the second end and having an outside diameter sized to substantially match an inner diameter of the through bore will be stopped from exiting the first end of the main body by the first collar; and an at least partially circumferential second collar at the second end of the main body, the second collar protruding radially outward from the main body and sized and arranged such that a conduit placed over the main body at the first end and having an inside diameter sized to substantially match an outer diameter of the main body will be stopped from extending beyond the second end of the main body by the second collar.