Patent ID: 8573951

Claim:
A pool recirculation pump safety system comprising: a power supply assembly operable to selectively supply operating power to a recirculation pump motor; an entrapment detection assembly operable to detect a change in a recirculation system parameter indicative of swimmer entrapment at a suction intake opening; and a timer assembly operable to automatically bypass the entrapment detection assembly for a predetermined time period upon energization of the system; wherein, during operation of the recirculation pump motor, the system is configured to secure operating power to the recirculation pump motor upon detection of the indicative recirculation system parameter change after the predetermined time period; wherein the power supply assembly includes a power relay having a relay coil, the relay coil permitting supply of power to the recirculation pump motor only when energized; wherein the entrapment detection assembly includes a switch that closes only when the indicative recirculation system parameter rises reaches a predetermined threshold, the switch being arranged in series with the relay coil; and wherein the timer assembly includes a time delay relay that closes only during the predetermined time period, the time delay relay being arranged in series with the relay coil and in parallel with the switch.