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Float-controlled humidifier

  • US 4,913,140 A
  • Filed: 08/17/1988
  • Issued: 04/03/1990
  • Est. Priority Date: 09/07/1987
  • Status: Expired due to Term
First Claim
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1. Apparatus for humidifying gases comprising:

  • a gas chamber having an inlet and an outlet to enable gases to be passed through said chamber;

    a water compartment below and interconnected with said gas chamber;

    a microporous wall between and common to said gas chamber and water compartment, said microporous wall being permeable to water vapor but substantially impermeable to liquid water;

    at least one float in said gas chamber;

    a water inlet means;

    a water conduit leading from said inlet means to said water compartment; and

    at least one water control valve comprising a movable valve member connected to said at least one float for operation thereby and a valve seat on said water conduit between said water inlet means and compartment, so that when more than a predetermined amount of water enters said gas chamber from said water compartment, said at least one float is raised by said water and actuates said movable valve member relative to and into closing engagement with said valve seat to prevent further entry of water into said water compartment.

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