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Air-powered filter arrangement

  • US 7,316,775 B2
  • Filed: 11/30/2004
  • Issued: 01/08/2008
  • Est. Priority Date: 11/30/2004
  • Status: Active Grant
First Claim
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1. A filter, comprising:

  • a filter housing configured to mount internally to an aquarium;

    a removable filter cartridge positioned within the filter housing, the filter cartridge defining first and second chambers within the filter housing, the first and second chambers being oriented in a side-by-side arrangement; and

    a pneumatic intake assembly arranged to fill the first chamber of the filter housing with unfiltered water, the unfiltered water reaching a first water level during operation of the filter;

    wherein during operation water flows from the first chamber, through the filter cartridge, and into the second chamber only by gravity feed and without use of a water pump.

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