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Liquid-tank debris extraction system and method of operation thereof

  • US 6,352,645 B1
  • Filed: 07/17/2000
  • Issued: 03/05/2002
  • Est. Priority Date: 07/17/2000
  • Status: Active Grant
First Claim
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1. 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.

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