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Class Information
Number: 392/487
Name: Electric resistance heating devices > Heating devices (class 219 subclass 200) > Continuous flow type fluid heater > Heated line section with heating element internal of flow path > With jacket for heating element
Description: Subject matter wherein the heating element is enclosed by an outer protective covering.

Patents under this class:

Patent Number Title Of Patent Date Issued
8450666 High-efficiency water boiling device May. 28, 2013
7560672 Heated pump with boiling protection Jul. 14, 2009
7188434 Molecular filter dehumidification apparatus and plant Mar. 13, 2007
6736598 Pump with a heatable housing May. 18, 2004
6723968 Conductive U-shaped jumper strap and method of use Apr. 20, 2004
6593554 Method and apparatus for mounting a heater thermostat and temperature sensitive fuse Jul. 15, 2003
6516143 Fluid heating apparatus Feb. 4, 2003
6470836 Water jacket assembly Oct. 29, 2002
6433318 Electric heater assembly with in-line thermostat Aug. 13, 2002
6154608 Dry element water heater Nov. 28, 2000
5882416 Liquid delivery system, heater apparatus for liquid delivery system, and vaporizer Mar. 16, 1999
5872890 Cartridge heater system Feb. 16, 1999
5838880 Ground heating system Nov. 17, 1998
5729653 Fluid warming system Mar. 17, 1998
5482685 Deodorizing apparatus Jan. 9, 1996
5371830 High-efficiency infrared electric liquid-heater Dec. 6, 1994
5257341 Compact in-line thermostatically controlled electric water heater for use with dental instruments Oct. 26, 1993
5220637 Method and apparatus for controllably generating smoke Jun. 15, 1993
5206928 Thermostat-controlled water heating device for a bidet of a water closet with damped cold water inflow Apr. 27, 1993
5170462 Apparatus for supplying heated water to a bidet Dec. 8, 1992
4825043 Electric continuous flow heater for liquid containers Apr. 25, 1989
4786782 Electric instantaneous water heater with enhanced temperature control Nov. 22, 1988
4710610 Electric resistance heater and limit switch assembly Dec. 1, 1987
4684786 Electrically heated fuel pick-up assembly for vehicle fuel tanks Aug. 4, 1987
4578565 Combined electric heating and water inlet/outlet assembly for water heating tanks Mar. 25, 1986
4558207 Electric fluid heater having combined heating and flow control mechanism Dec. 10, 1985
4461347 Heat exchange assembly for ultra-pure water Jul. 24, 1984
4455475 Automatic device for quick heating of liquids, particularly water Jun. 19, 1984
4424767 Instant hot water heater Jan. 10, 1984
4414464 Electrical water heating device with improved internal circulation Nov. 8, 1983
4391459 Instant hot water dispenser Jul. 5, 1983
4390776 Immersion heater Jun. 28, 1983
4358665 Thermal cut-out arrangement for an electric water heater Nov. 9, 1982
4286140 Apparatus for raising a liquid to a given temperature Aug. 25, 1981
4197446 Energy-saving device for domestic water heaters Apr. 8, 1980
4164254 Heat exchange device Aug. 14, 1979
4110602 Method and apparatus for freeing a railroad tank car bottom unloading valve made inoperable by solidified fluids within it Aug. 29, 1978
3999190 Temperature control system for ink jet printer Dec. 21, 1976
3997083 Shaving lather heater and dispenser having heat storing element Dec. 14, 1976
3990612 Heating apparatus for pressurized products Nov. 9, 1976
3979574 Tank type engine heater Sep. 7, 1976
3969605 Thermal pulse type heater for coolant systems and the like Jul. 13, 1976

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