Patent ID: 6352645
Filing Date: 2002-03-05
Classification: B01D

Abstract:
A system for extraction of debris from a liquid, said system comprising:a reversible motor, said motor being a first part of a submersible vacuum unit configured to be completely submersed in said liquid; a pump coupled to said motor, said pump being a second part of said submersible vacuum unit; a filtration unit removably coupled to said pump and incorporating a filter configured to entrap said debris, said filtration unit being a third part of said submersible vacuum unit; and a control unit electrically coupled to said motor and configured to determine a rotational direction of said motor from outside said liquid, wherein said pump passes a portion of said liquid through said filtration unit as a forward flow when said control unit causes said motor to operate in a forward rotational direction, and wherein said pump passes a portion of said liquid through said filtration unit as a reverse flow when said control unit causes said motor to operate in a reverse rotational direction.