Safety circulation system

Details Safety circulation system Safety circulation system

1982-03-18

1983-09-06

Artis, Henry K.

Baths, closets, sinks, and spittoons

Pool type

Accessory

4507, 4541, 4544, E04H 316, E04H 318, E04H 319

Patent

active

044020945

ABSTRACT:
A liquid circulation system having a tank or tub of liquid and an external recirculation pump with one or more suction ports in the tank, and a submerged return port from the pump, having each suction port adjacent to, and preferably annular to, a return port. The entrapment of large objects in the suction port or ports is prevented by close proximity between the suction and return ports, particularly when the return flow constitutes a high-velocity jet as in hot tubs or spas.

REFERENCES:
patent: 3377632 (1968-04-01), Peterson
patent: 3483863 (1969-12-01), Vane
patent: 3902202 (1975-09-01), Strange, Jr.
patent: 3940807 (1976-03-01), Baker et al.
patent: 3986217 (1976-10-01), Doerr et al.
patent: 4262371 (1981-04-01), Berry et al.
patent: 4320541 (1982-03-01), Neenan
patent: 4335854 (1982-06-01), Reynoso
patent: 4339833 (1982-07-01), Mandell
patent: 4340039 (1982-07-01), Hibband et al.

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