Other

Eric G Gunderson

Dennis E Gunderson

An abrasive liquid pump having a pump housing and a piston component configured for slidable movement within the pump housing. The pump housing has a bottom housing portion with a bottom end and a bottom mid-pump end and a top housing portion with a top end and a top mid-pump end. The top portion is removably attached to the bottom portion. The piston component has a top piston assembly on one end having at least one sealing component for sealable engagement against an inner surface of the top housing portion and a bottom piston assembly on the other end having at least on sealing component for sealable engagement against an inner surface of the bottom housing portion.

Abrasive liquid pump apparatus and method

The present invention is directed to a filtering system and method of filtering an aqueous medium, such as water in an aquarium tank. The aquarium water is brought into contact with a filtering medium, preferably a biological filtering medium. The filtering medium purifies the aquarium water by removing impurities from the aquarium water. At a certain time, the water is rapidly removed from the filtering medium, preferably by siphoning action. The process and system provides the biological filtering medium with exposure to air necessary to sustain the life and activity of the bacteria growing on the biological medium. At the same time, the system purifies the aquarium water.

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Madison, WI, United States of America

Eric G Gunderson