Spa safety drain

Details Spa safety drain Spa safety drain

1977-03-14

1978-09-26

Levy, Stuart S.

Baths, closets, sinks, and spittoons

Dry closets

With heating meas

4180, 4292, 128 66, 210416R, E04H 319, A61H 900, A61H 3302

Patent

active

041158784

ABSTRACT:
A safety drain for a spa having a recirculating water pump is arranged to prevent entrapment, against the drain, of an object or person that may inadvertently block flow of water through the drain. The drain body, having a first fitting connected to the suction line of the pump, is provided with a second fitting connected to a vent conduit that has an end open to atmosphere at a point above water level. A by-pass conduit interconnecting the pump suction line and the vent conduit avoids disablement of the safety function of the vent conduit if the latter should become blocked within the drain.

REFERENCES:
patent: 1999277 (1935-04-01), Boosey
patent: 2689017 (1954-09-01), Schmid
patent: 3288134 (1966-11-01), Reich
patent: 3345982 (1967-10-01), Guiler
patent: 3571818 (1971-03-01), Jacuzze
patent: 3940807 (1976-03-01), Baker et al.
patent: 3943580 (1976-03-01), Carter

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