| 摘要 |
A weighted, elastically deformable conduit having discharge openings spaced along the length thereof and adapted to be submerged beneath the surface of a liquid to be agitated, aerated or displaced by means of compressed air discharged from said openings, is described. The conduit wall is sufficiently thin and flexible so that the conduit collapses under the influence of the liquid pressure on the outside of same when the supply of pressurized air to the interior of the conduit is shut off. In addition, the discharge outlets are located in those portions of the conduit wall adjacent the weight retaining means. Both these features contribute towards the elimination of foreign material from the interior of the conduit, especially around the discharge openings, which might tend to clog the latter.
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