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Class Information
Number: 236/23
Name: Automatic temperature and humidity regulation > Closed fluid heaters > Combined thermostat and flow controlled > One valve
Description: Devices in which the heating means, usually a gas-burner, is controlled by the combined action of a thermostat in the fluid heated and a flow-motor operated by the flow of the fluid heated, the thermostat and motor controlling the movement of a single control-valve.

Patents under this class:

Patent Number Title Of Patent Date Issued
5092519 Control system for water heaters Mar. 3, 1992
4880157 Capacity control for integrated furnace Nov. 14, 1989
4738395 Fluid flow rate detector and system Apr. 19, 1988
4497434 Detector of the flowing of a fluid in a pipe and energy saving device for a hot water system using this detector Feb. 5, 1985
4304249 Control units Dec. 8, 1981
4184457 Water flow responsive control for a liquid heater Jan. 22, 1980

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