×

EMERGENCY SUMP PUMP APPARATUS

  • US 3,634,842 A
  • Filed: 04/09/1970
  • Issued: 01/11/1972
  • Est. Priority Date: 04/09/1970
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for use with a drainage sump and a source of alternating current, said apparatus including:

  • a sump pump having an electric motor suitable for battery operation, said pump being adapted for use in connection with said sump;

    a rechargeable battery for said motor;

    charging means adapted to be connected to said source and connected to said battery for charging the battery;

    float switch means for said sump providing a closed connection with an excessive amount of liquid in the sump and otherwise an open connection;

    a relay having a solenoid and normally open contact means which are closed when said solenoid is energized;

    first circuit means connecting said float switch means, said battery and said solenoid in series to energize said solenoid when there is a closed connection at said float switch means; and

    second circuit means connecting said contact means, said battery and motor in series to energize said motor with said contact means in the closed position.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×