Gas and liquid contact apparatus – Fluid distribution – Valved
Patent
1990-08-07
1992-02-04
Chiesa, Richard L.
Gas and liquid contact apparatus
Fluid distribution
Valved
137854, 2102212, 239145, 261122, B01F 304
Patent
active
RE0338125
ABSTRACT:
A diffuser for introducing gas in bubbles into liquid held in an aeration tank [comprising] having a body member having a backing surface and passaging extending from a gas inlet to an outlet at the backing surface, and a flexible, gas permeable membrane covering the backing surface and secured at its periphery to the body member in sealing relationship thereto. The membrane is [adapted to distend] distendable and [move] moves away from the backing surface upon delivery of gas under pressure to diffuser, with the gas flowing through the distended portion of the membrane and into the liquid in the form of relatively small gas bubbles, and [adapted to collapse] collapses into engagement with the backing surface when gas under pressure is not delivered to the difuser. A check valve [comprising] has a movable valve member on the membrane and a valve seat on the backing surface enables flow of gas into the space between backing surface and the membrane, and blocks flow of liquid into the passaging in the body member.
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Parkson Corporation catalog excerpt, "Diffused Aeration Products", date unknown.
Nokia catalog excerpt, Catalog No. 8.6.0, Apr. 1977.
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