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| Number | Title | Issue Date |
| 6976052 | Spa control system An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, an... | 12/13/2005 |
| 6965815 | Spa control system An improved spa control system is disclosed. The invention describes a spa control system which calculates the time required to heat the water in the spa system to a desired temperature. From that information, the heating rate of the spa system can be determined, an... | 11/15/2005 |
| 6886756 | Method and apparatus for controlling and providing electrical connections for a boiler A method and apparatus for providing an electronic controller for a boiler is provided. A method and apparatus for providing a boiler with consolidated electronic connections is also provided. ... | 05/03/2005 |
| 6648235 | Control method of thermostatic system A control method of a thermostatic system for a hot water heater is provided where when the water temperature in the hot water heater is too large, a first electromagnetic valve is controlled to be open and a second electromagnetic valve is controlled to ... | 11/18/2003 |
| 5946926 | Variable flow chilled fluid cooling system The present invention improves efficiency, and thereby save energy, in compressed fluid types of cooling systems, avoids instability in chiller controls, and thus provides for stable operation of a chiller in a cooling system, and provides a novel, improv... | 09/07/1999 |
| 5092519 | Control system for water heaters A control system for a gas water heater including a fuel rate control valve, a water flow switch to control the fuel rate valve, an inlet water temperature switch to reduce fuel flow when inlet temperature is high, a temperature switch at the water outlet... | 03/03/1992 |
| 5039007 | Water and air heating system A heating system in which water is heated by means of a gas heater or the like in which the heated water can be used for washing and the like or for making hot drinks such as coffee and the like, and in which the heated water can also be used to heat air ... | 08/13/1991 |
| 4738395 | Fluid flow rate detector and system A fluid flow rate detector for controlling an electric switch in a circuit for regulating fluid flow, the detector including inner and outer portions where fluid is received in the inner portion and flows out into the outer portion through perforations in... | 04/19/1988 |
| 4678116 | Water heater A compact continuous flow energy efficient gas fired water heater/boiler for use in residential, commercial and industrial buildings wherein cold water enters the heater and flows downward through an outer annulus and then rises up through an inner annulu... | 07/07/1987 |
| 4627416 | Water heater A water heater is disclosed having a heat exchanger, a main burner means for heating the heat exchanger, a standing burner, a main fuel passage means for supplying fuel to the main burner, a manual valve on the main fuel passage means which is operable by... | 12/09/1986 |
| 4556168 | Rapid response water heating and delivery system A rapid response water heating and delivery system having a flow restrictor which creates a pressure differential within the water inlet point to the heating system which is sensed by a pressure differential switch for activating the heating elements of t... | 12/03/1985 |
| 4549525 | Oil and gas water heater A heater system having improved efficiency and performance embodies air and fuel regulator valves, water and air supply jackets, and flow directors for the hot combustion gas generated by the heater burner which gas passes through a central flue in a wate... | 10/29/1985 |
| 4505253 | Water heater A water heater is disclosed having a main burner for heating a heat exchanger and a standing burner, and is also provided with an electromagnetic safety valve which is opened by a manual operation member and which is kept in its valve open condition by th... | 03/19/1985 |
| 4497434 | Detector of the flowing of a fluid in a pipe and energy saving device for a hot water system using this detector A fluid flow sensor, comprising a tubular element having a greater diameter than and vertically mounted on a pipe for serially interconnecting two portions of this pipe. One portion is connected to the upper end of the tubular element while the other port... | 02/05/1985 |
| 4431132 | Control valve systems for gas water heaters A control valve system for a gas-fired, instantaneous water heater is disclosed. The valve has a "snap" action constructed to inhibit the supply to the burner of insufficient amounts of gas to ensure reliable ignition. In one example, a flexible diaphragm... | 02/14/1984 |
| 4385724 | Apparatus for controlling the water temperature of a spa An improved temperature sensing and control apparatus for a spa is described, which control apparatus is located at the spa. A switching means is disposed in the series electrical circuit of a water heating mechanism. The switching means is remotely contr... | 05/31/1983 |
| 4171771 | Central heating systems A central heating system comprising a heat exchanger, heat dissipating means, and a connecting piping circuit for liquid flow, has a pump capable of pumping the liquid around the circuit at a lower or a high flow rate, the flow rate of liquid being sensed... | 10/23/1979 |
| 4147159 | Temperature controlled instantaneous water heating apparatus An instantaneous, automatic gas water heater for a hot water system having a cold water supply conduit connected to a plurality of loosely wound small heat exchange tubes which, in turn are connected to a hot water outlet conduit having faucets. The heat ... | 04/03/1979 |
