Gas distributing structure

Claim 1

IN A GAS BURST FLUID AGITATION APPARATUS IN WHICH A PLENUM IS IMMERSED IN A TANK OF LIQUID FOR AGITATION THEREOF AND A GAS FROM A SOURCE THEREOF IS INTRODUCED INTO AND DISTRIBUTED BY THE PLENUM IN INTERMITTENT BURST; A PLENUM STRUCTURE COMPRISING AN ELONGATE HOLLOW TUBE OF FLUID IMPERVIOUS MATERIAL HAVING ONE END THEROF FOR CONNECTION TO A SOURCE OF INTERMITTENT BURSTS OF GAS AND THE OTHER END THEREOF CLOSED OFF, SAID TUBE HAVING A PLURALITY OF SPACED PASSAGEWAYS OF SMALL DIAMETER FORMED IN THE CIRCUMFERENTIAL WALL OF THE TUBE AND ALONG THE LENGTH THEREOF, AN ELONGATED JACKET OF POROUS MATERIAL ADAPTED TO COVER A PORTION OF SAID WALL AND A FLUID IMPERVIOUS RESILIENT GASKET INTERPOSED BETWEEN THE TUBE AND THE JACKET, SAID GASKET HAVING AT LEAST A PAIR OF SEPARATED SLOTS THERETHROUGH, SAID PASSAGEWAYS OF THE TUBE AND SAID SLOTS OF THE GASKET BEING ALINGED WHEREBY SAID PASSAGEWAYS OPEN INTO SAID SLOTS, MEANS FOR CLAMPING SAID TUBE, JACKET AND GASKET TOGTHER FOR FORMING SAID STRUCTURE, THE GAS BEING INTRODUCED INTO THE TUBE PASSING THROUGH THROUGH THE PASSAGEWAYS TO EMERGE IN FINE BUBBLES UNIFORMLY OVER THE FULL LENGTH OF THE JACKET REGARDLESS OF VIRATIONS IN THE THICKNESS OF THE JACKET WALL.