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Anesthesia humidifier

  • US 4,152,379 A
  • Filed: 05/26/1977
  • Issued: 05/01/1979
  • Est. Priority Date: 05/26/1977
  • Status: Expired due to Term
First Claim
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1. A gas humidifying apparatus, comprising in combination:

  • a generally enclosed chamber adapted to contain a water reservoir;

    a highly flexible umbrella-shaped member mounted in said chamber with the open concavity thereof facing said water reservoir, and with the peripheral edge of said member normally extending beneath said water, whereby the interior of said member defines with said water surface a gas accumulation space;

    gas inlet means communicating with said gas accumulation space for introducing gas to be humidified therein;

    gas outlet means communicating with the chamber space external to said member;

    at least portions of the peripheral edge of said member being upwardly displaceable by a positive pressure differential established in said gas accumulation space with respect to said chamber space in consequence of gas flow between said inlet and said outlet, and said displaced edge portions being self-restorable to said normal position upon said gas pressures being equalized across said accumulation and chamber spaces;

    whereby the resultant intermittent displacements of said member edge above said water level enables intermittent flow of humidified gas from said accumulation space and through said chamber space to said gas outlet means;

    said displacements of said peripheral edge from said water serving further to agitate the said water and surface thereof to promote intimate contact between said gas and said water to effect improved humidification of said gas.

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