# US 7,461,416 B2 · Portable spa heater

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- Number: US 7,461,416 B2
- Document ID: US7461416B2
- Status: Granted
- Kind: B2
- Application number: 11/436,627
- Filed: 2006-05-19
- Published: 2006-11-23
- Granted: 2008-12-09
- Earliest claimed: 2005-05-20
- Inventors: John J. Stover
- Web page: https://patentgrep.com/patent/US7461416B2

## CPC

- E04H 4/129: {Systems for heating the water content of swimming pools (solar collectors using pools F24S10/17, F24S10/10; by solar radiation F24S20/02)}
- E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D)

## Abstract

A portable water heating system for use with a spa. The heating system circulates water from a spa, heats the water and returns the heated water to the spa. The portable heating system includes a housing that encloses a heater and a pump; a water intake hose; a water outlet hose; and a thermostat. The heating system may also include temperature-setting dials and flow and pressure regulating switches. A thermostat is also disposed within the portable spa heating system and is attached to the heater. The thermostat may be set to a predetermined temperature so that the heater, and therefore water temperature, may be controlled.

## Claims

### Claim 1

A portable heater unit for heating water contained in a water reservoir of a spa, said portable heater unit consisting of:
a housing;
a carrying handle affixed atop the housing;
an electric heater disposed within the housing;
an electrically connected thermostat assembly disposed within the housing for regulating the temperature of water flowing out of the heater, said thermostat assembly including a dial-type regulator externally disposed on the housing for adjusting the outflow water temperature from the heater and a display external of the housing for displaying the outflow water temperature from the heater;
a pump disposed within the housing;
an electric cord and male plug for connecting said pump and heater to a source of electricity;
a water conduit at a discharge end of the pump for flowing water through the heater;
a water intake hose extending between the pump and the spa for pumping water out of the water reservoir of the spa;
water flow sensors interposed on the water conduit at the discharge end of the pump;
light indicators attached to the housing and electrically connected to the water flow sensors for indicating water flow status; and
a water outlet hose extending from the heater to the spa for returning water to the spa;
whereby, the portable heater unit regulates water temperature and monitors water flow as water is drawn from the water reservoir of the spa through the water intake hose and circulated from the pump to the water heater, wherein the water is heated and discharged through a water outlet hose then circulated back into the spa water reservoir.

### Claim 2 (depends on 1)

A portable heater unit according to claim 1, wherein the housing is made from a material selected for the group consisting of plastic, aluminum and metal.