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Class Information
Number: 236/21R
Name: Automatic temperature and humidity regulation > Closed fluid heaters > Safety cut-out
Description:










Sub-classes under this class:

Class Number Class Name Patents
236/21B Water heater control with excessive temperature cutoff 28


Patents under this class:

Patent Number Title Of Patent Date Issued
8317511 Control valves for heaters and fireplace devices Nov. 27, 2012
8214060 Building appliance controller with safety feature Jul. 3, 2012
8074892 Appliance control with automatic damper detection Dec. 13, 2011
7891572 Temperature and low water monitoring for boiler systems Feb. 22, 2011
7721972 Appliance control with automatic damper detection May. 25, 2010
6976636 Heater having over temperature shut off control Dec. 20, 2005
6728600 Distributed appliance control system having fault isolation Apr. 27, 2004
6129284 Integrated appliance control system Oct. 10, 2000
5836511 Solar hot water heating system Nov. 17, 1998
5838243 Combination carbon monoxide sensor and combustion heating device shut-off system Nov. 17, 1998
5520327 Electronic thermostat having safety feature May. 28, 1996
5451929 Smoke alarm and air cleaning device Sep. 19, 1995
4986468 Test circuit for system monitoring apparatus Jan. 22, 1991
4984736 Heater for motor vehicles which can be operated on several power settings Jan. 15, 1991
4818970 Fire condition detection and control system for air moving and filtering units Apr. 4, 1989
4750452 Water heater Jun. 14, 1988
4726514 Heating device Feb. 23, 1988
4598668 Apparatus for efficiently controlling the operation of parallel boiler units Jul. 8, 1986
4429682 Automatic safety gas heating device Feb. 7, 1984
4375273 Combustion automatic control system Mar. 1, 1983
4374506 Automatic flue gas heat recovery system Feb. 22, 1983
4367845 Automatic temperature control system for diver heating system Jan. 11, 1983
4295604 Automatic temperature control system for diver heating system Oct. 20, 1981
4240579 Thermostatically controlled heating system Dec. 23, 1980











 
 
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