Aquarium power head with integral muffler

An aquarium power head for pumping water through a filter system to return it to the aquarium and for aerating the returned water, the power head comprising:

• a pump and a housing enclosing said pump;
• a water conduit located within said housing,
• said pump having an impeller extending into said conduit for urging water of the tank to flow through said conduit;
• an air breather conduit located within said housing and communicating with said water conduit and extending from said water conduit to a source of entering air so that a flow of the water through said water conduit entrains air from said breather conduit into the water in said water conduit;
• and
• wherein said breather conduit comprises a non-absorbent muffler integral with said housing for silencing sound emitted by the entraining of the air in the water.

A power head for an aquarium tank, the power head comprising:

• a pump for pumping water of the aquarium tank;
• a water conduit;
• and
• a housing enclosing said pump and said water conduit, said housing having an inlet port for receiving water and an outlet port for discharging water, said pump and said conduit being serially connected between said inlet port and said outlet port;
• wherein said housing has substantially the shape of a circular cylinder to avoid trapping fish between the housing and a wall of the aquarium tank;
• and
• an air breather conduit communicating with said water conduit for mixing air with the water, said breather conduit being disposed within said housing and entraining air into said water conduit;
• said breather circuit comprising a non-absorbant muffler for silencing sound emitted by the mixing of air with the water, said muffler being located on an outer wall of said housing.

An aquarium power head for pumping water through a filter system to return it to the aquarium and for aerating the returned water, the power head comprising:

• a pump and a housing enclosing said pump;
• a water conduit located within said housing,
• said pump having an impeller extending into said conduit for urging water of the tank to flow through said conduit;
• and
• an air breather conduit communicating with said water conduit and extending from said water conduit to a source of entering air, a flowing of the water through said water conduit entraining air from said breather conduit into the water in said water conduit;
• and
• wherein said breather conduit comprises a muffler integral with said housing for silencing sound emitted by the entraining of the air in the water.
• said muffler comprising a circular path, with the path doubling back around itself to provide a series of concentric circles.

An aquarium power head for pumping water through a filter system to return it to the aquarium and for aerating the returned water, the power head comprising:

• a pump and a housing enclosing said pump;
• a water conduit located within said housing,
• said pump having an impeller extending into said conduit for urging water of the tank to flow through said conduit;
• and
• an air breather conduit communicating with said water conduit and extending from said water conduit to a source of entering air, a flowing of the water through said water conduit entraining air from said breather conduit into the water in said water conduit;
• and
• wherein said breather conduit comprises a muffler integral with said housing for silencing sound emitted by the entraining of the air in the water,
• said muffler comprising a serpentine corridor including a sequence of arcuate passages having differing radii of curvature, said arcuate passages being serially connected to define said serpentine corridor.