×

Leak sensing alarm and supply shut-off apparatus

  • US 4,845,472 A
  • Filed: 11/06/1986
  • Issued: 07/04/1989
  • Est. Priority Date: 11/06/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. For use with a liquid supply line having a cutoff valve associated therewith, apparatus comprising a detector for detecting the presence of leaked moisture indicative of a fault condition;

  • an actuator coupled to said cutoff valve and detector and operable to actuate said cutoff valve to an "off" position in response to a fault condition;

    first visible condition indicator means for indicating that the apparatus is in an armed state;

    second visible condition indicator means for indicating that the detector senses a fault condition, said second condition indicator means being responsive to said detector;

    electronic circuit means operatively interconnecting said first and said second condition indicator means, whereby sensing of a fault condition deactivates said first condition indicator means and activates said second condition indicator means; and

    a manually operable switch for selectively manually operating said cutoff valve, said manually operable switch being operatively coupled to said first and second condition indicator means to activate both said first and second condition indicator means when said manually operable switch is in a closed condition so as to indicate the condition of said manually operable switch.

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