Patent ID: 9200464
Filing Date: 2015-12-01
Classification: E04H

Abstract:
1. A swimming pool safety drain comprising: (a) a base having a bottom and having end walls and upwardly diverging sidewalls extending therefrom to form an open top enclosure, said sidewalls including at least one upwardly extending positioning keyway therein to receive a mating key; (b) a cover having a periphery, said cover removably secured to said enclosure forming an input slot about said periphery between said cover and said walls to permit water to enter the enclosure from the pool; (c) a drain outlet formed in the bottom of said base for connection to a low pressure side of a swimming pool pump of a pool recirculation system; (d) a safety bridge mounted in said enclosure between said sidewalls and positioned over said drain outlet, said safety bridge extending for a predetermined horizontal length, said predetermined horizontal length creating water flow from any point at said input slot to said drain outlet that is a greater distance than a straight line from said point to said drain outlet; (e) the total area of said input slot greater than the total area of said outlet to maintain a water flow rate at said input lower than water flow rate at said outlet; (f) said safety bridge including a downwardly extending keying surface mating with the respective keyway of said sidewalls and insertable in said enclosure between said sidewalls with said keying surface contacting said keyway to position said safety bridge over said drain outlets; and (g) wherein said upwardly extending positioning keyway is cone shaped and extends outwardly from a sidewall, and wherein said safety bridge keying surface is cone shaped and is insertable and snappable into place in the enclosure between the sidewalls with the keying surface mating with the keyway; whereby said safety bridge may be cemented in place to become a permanent portion of the safety drain.