Apparatus for gas diffusion

Claim 1

A swing type air distributor for treating waste water within a basin comprising: support means affixed to the top surface of a wall of the basin; at least two separate elongated support members laterally spaced from each other along said wall affixed to said support means, said support members depending vertically from the support means into said basin; a header generally horizontally disposed within said basin proximate the floor of same, and being connected to the lower ends of Said support members; a plurality of hollow diffusers coupled to said header; a conduit for supply of air under pressure to said diffusers via said header; each of said support members comprising upper and lower legs having a hinge therebetween which permits raising the header to a location proximate the top surface of said basin; said support means comprising spaced stanchions on said wall; a shaft supported by said stanchions; means for driving said shaft; and a cable connecting the lower leg of each of said support members to said shaft so that as the drive means rotates the shaft, the support members and attached header are drawn upwardly by the cables to a position proximate the top surface of said wall.