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Safety device for avoiding entrapment at a water reservoir drain having a secondary blowing pump

  • US 5,865,601 A
  • Filed: 02/06/1998
  • Issued: 02/02/1999
  • Est. Priority Date: 02/06/1998
  • Status: Expired due to Fees
First Claim
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1. An apparatus for automatically dislodging a person or thing trapped at the drain of a liquid reservoir having a liquid reservoir pump in fluid communication with the drain at a reservoir pump inlet, said apparatus comprising:

  • (a) a pressure pump and a valve coupled together in fluid communication with each other, said pressure pump having an inlet coupled in fluid communication with a liquid source and said valve having an outlet coupled in fluid communication with the drain; and

    (b) an electrical circuit that automatically shuts-off power to the liquid reservoir pump whenever the drain becomes obstructed, while energizing said pressure pump and opening said valve to permit the generation of positive pressure into the drain to dislodge the obstruction.

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