Hydro-massage tub control system

Baths – closets – sinks – and spittoons – Tubs – Combined with diverse means

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Details

45440, 732930, 733010, 2194920, 2194940, 2195060, 250231019, 3406190, 417 380, A61H 3302, F24H 110, G01D 534, F04B 4900

Patent

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050797840

ABSTRACT:
A control system for hydro-massage tub systems in which water is circulated through a pump and heater from the tub back to a plurality of jets in the tub to create a turbulent massaging action. The system is comprised of an activating device, a pump, a switch activating circuit, a heater with proportional control and a water level sensing safety system. The pump is controlled by a switching and timing circuit that limits the time the pump is on which is slaved to a heater control circuit to prevent operation of the heater unless the pump is circulating water. The proportional heater control circuit maintains the water temperature within a degree or two of a preset temperature by proportionally reducing power as the temperature approaches the preset limit. The activating device transmits a ignal to the switching and timer circuit when a mechanical plunger isolated from electrical circuits is operated. The level sensing device monitors the water level in the tub and interrupts or prevents operation of the switching and timing circuit unless water is at a level which activates the level sensing signal transmission circuit.

REFERENCES:
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patent: 4061988 (1977-12-01), Lewandowski
patent: 4169293 (1979-10-01), Weaver
patent: 4233694 (1980-11-01), Janosko et al.
patent: 4260862 (1981-04-01), Orcutt
patent: 4289963 (1981-09-01), Everett
patent: 4337388 (1982-06-01), July
patent: 4398284 (1983-08-01), Pryor
patent: 4464936 (1984-08-01), McIntire et al.
patent: 4564962 (1986-11-01), Castleberry et al.
patent: 4604633 (1986-08-01), Kimura et al.
patent: 4763365 (1988-08-01), Gerondale et al.
patent: 4780917 (1988-11-01), Hancock
patent: 4797958 (1989-01-01), Guzzini
Spa and Sauna, Dec. 1987, pp. 1, 29, 54 and 66.

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