Patent ID: 7350824

Claim:
A drain fitting and vacuum and pressure line system for receiving and maintaining vacuum and positive pressures, said system comprising: a drain fitting having an integral, unitary body, said unitary body comprising: (a) a lower section comprising a curvilinear outer wall substantially uniform in thickness with a concave inner surface and a convex outer surface, said wall encompassing a space and substantially surrounding an opening means having a first width for the passage of vacuum suction and positive pressure forces, said space extending substantially the entire length of the lower section and being completely defined by and encompassed within the concave inner surface, the space comprising a finite area completely open between the concave inner surface and the opening means; and (b) an upper section upstanding from, and concentric to, the lower section said upper section being totally outside of and extending away from the space encompassed by the outer wall and having a second width smaller than the first width, said upper section comprising first and second concentrically aligned cylindrical segments of equal length, each said cylindrical segment having an outer surface which completely circumscribes the full length of the segment without outer surface interruption, each segment located outside of said space and extending the full length of the upper section; said upper section further comprising a through passage located within the second segment enclosed, without outer surface interruption, by the second segment, said passage extending the full length of said second segment and having two open ends, one end being open to the space; and a channel located between the first and second segments, said channel being enclosed, without surface interruption, by the first and second segments, and extending the full length of the segments and having one open end and one closed end proximal the convex outer surface; and at least one elongated, unitary length vacuum and positive pressure line independent of any separate line connector means, said line having an open end with a diameter which conforms in size to the upper section of the fitting, said open end of the line being in adjacent, co-joined, direct contact with the upper section of the drain fitting, forming a contiguous, direct joint between the vacuum and positive pressure line and the drain fitting independent of any intervening separate line connector means.