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Apparatus for aerating a liquid

  • US 3,880,965 A
  • Filed: 11/24/1972
  • Issued: 04/29/1975
  • Est. Priority Date: 11/24/1972
  • Status: Expired due to Term
First Claim
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1. APPARATUS FOR DIFFUSING A GAS INTO A LIQUID, COMPRISING A FLEXIBLE SHEET-LIKE THERMOPLASTICS MATERIAL FORMING AN ELONGATED TUBE HAVING OPPOSITE END PORTIONS, MEANS ENGAGING SAID END PORTIONS OF SAID TUBE AND ARRANGED FOR POSITIONING SAID TUBE GENERALLY HORIZONTALLY WITHIN THE LIQUID, SAID TUBE HAVING A GAS PERMEABLE UPPER PORTION CONTINUOUSLY ALONG THE LENGTH THEREOF AND FORMED BY PERMANENTLY OPENED PORES WITHIN SAID FLEXIBLE SHEET-LIKE MATERIAL TO PROVIDE FOR THE ESCAPE OF MICROBUBBLES OF GAS FROM SAID TUBE UPWARDLY INTO THE LIQUID ABOVE SAID TUBE, SAID TUBE HAVING A SUBSTANTIALLY GAS IMPERMEABLE LOWER PORTION TO AVOID THE ESCAPE OF GAS FROM THE SAID LOWER PORTION OF SAID TUBE, SAID TUBE BEING INFLATABLE TO A SUBSTANTIALLY CIRCULAR CROSS-SECTIONAL CONFIGURATION WHEN SAID TUBE IS SUBMERGED IN THE LIQUID AND GAS IS SUPPLIED TO SAID TUBE TO PROVIDE FOR MAXIMUM GAS FLOW THROUGH SAID TUBE, SAID TUBE BEING COLLAPSIBLE TO A GENERALLY FLAT CONFIGURATION IN RESPONSE TO THE PRESSURE OF THE LIQUID WHEN THE GAS SUPPLY IS CUT OFF TO AVOID THE SEEPAGE OF LIQUID INTO SAID TUBE, SUPPORT MEANS INCLUDING AN ELONGATED SUBSTANTIALLY RIGID SUPPORT MEMBER EXTENDING LONGITUDINALLY BELOW THE CENTER OF SAID TUBE, AND MEANS CONNECTING SAID TUBE TO SAID SUPPORT MEMBER INTERMEDIATE SAID END PORTIONS OF SAID TUBE AND COOPERATING TO PROVIDE FOR FLEXING OF SAID TUBE BETWEEN SAID SUBSTANTIALLY CIRCULAR CONFIGURATION AND SAID GENERALLY FLAT CONFIGURATION.

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