Patents
Sitemap › F28 - Heat exchange in general › F28D - Heat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact; Heat storage plants or apparatus in general › F28D 21 - Heat-exchange apparatus not covered by any of the groups
Patents for F28D 21 - Heat-exchange apparatus not covered by any of the groups (2,512)
05/1981
05/12/1981US4266513 Flue heat exchanger
04/1981
04/29/1981EP0027478A1 Heat extractor for the recovery of heat from flue gases
03/1981
03/19/1981WO1981000760A1 Heat recovery system
03/10/1981US4254758 Vortex heat reclaiming system
03/10/1981US4254618 Cooling air cooler for a gas turbofan engine
02/1981
02/18/1981EP0024064A1 Complementary device for a heating installation
02/11/1981EP0023757A1 Ventilation heat exchanger
02/04/1981EP0023317A1 Device for recovering heat from flue gas and heat exchanger therefor
01/1981
01/27/1981US4246887 Heat recovery and solar assist heating system
01/06/1981US4243177 Chimney heat capturing system
12/1980
12/30/1980US4241874 Heat exchanger
12/30/1980CA1092597A1 Process and apparatus for heat exchange between fluids
11/1980
11/26/1980EP0019492A2 Gas conditioning system, especially air conditioning system
11/25/1980US4235286 Heat reclaiming flue pipe
11/11/1980US4232732 Heat arrester boot for room stove
11/11/1980US4232654 Heat recovery device for use in return air duct of forced air furnace for recovering heat from the flue of such furnace
10/1980
10/21/1980CA1088045A1 Modular heat exchangers with a common flue
10/15/1980EP0017256A2 Heat exchanger
10/14/1980CA1087410A1 Energy recovery system
09/1980
09/16/1980US4222349 Stack exhaust heat recycling system
08/1980
08/26/1980US4219073 Heat saver device
08/26/1980CA1084481A1 Heat rejection system
08/19/1980US4217877 Energy-saving forced-air furnace
08/12/1980CA1083546A1 Device for improving the efficiency of central hot- water heating systems
08/05/1980US4215741 Heat exchanger
07/1980
07/08/1980US4211610 Apparatus for heat and mass transfer
07/08/1980CA1080946A1 Method of winding a tube coil, and an arrangement for performing said method
06/1980
06/25/1980EP0012491A1 Heat-and-moisture exchanger, and ventilating device and air-conditioner including such heat-and-moisture exchanger
06/10/1980US4206875 Heat recovery apparatus
06/10/1980US4206742 Heat extractor and shield for room stoves and the like
06/03/1980CA1078823A1 Method for the utilization of the heat energy of sewage
06/03/1980CA1078820A1 Heat and moisture transferring system
05/1980
05/13/1980CA1077467A1 Heat reclaim system
03/1980
03/25/1980US4194488 Home heating system
03/18/1980CA1073636A1 Dual temperature isotopic exchange process and a device for the application of said process
02/1980
02/26/1980US4190035 Fluid heater
02/26/1980CA1072332A1 Method of and apparatus for utilization of waste energy
02/12/1980US4188167 Apparatus for aligning an inspection or repair device with a selected tube in a heat exchanger
02/12/1980US4187899 Method and apparatus for exchanging heat between fluids
02/12/1980US4187675 Compact air-to-air heat exchanger for jet engine application
01/1980
01/29/1980US4185685 Waste heat recovery system and method
01/22/1980US4184856 Countercurrent air flow, heat exchange
01/22/1980US4184536 Heat rejection system
01/15/1980US4183399 Heat pipe recuperator
12/1979
12/11/1979US4177766 Heat recovery system for furnaces and the like
12/04/1979US4176787 Heat recovery device for use in return air duct of forced air furnace
12/04/1979US4176709 Stack-type heat exchanger
12/04/1979CA1067484A1 Economizer
11/1979
11/28/1979EP0005463A1 Mechanism and method for extracting tubes
11/27/1979US4175518 Preheater device for hot water heaters
11/06/1979US4173125 Energy recovery system
10/1979
10/30/1979CA1065219A1 Heat exchange panel
10/23/1979US4171773 Fire jet air displacement heat exchanger device
10/16/1979US4171089 Heat exchanger
08/1979
08/14/1979US4164210 Pulse combustion system for heating of air
08/14/1979CA1060336A1 Method for producing heat by absorption
08/07/1979US4163430 Heat recovery and filter system and process for furnace exhaust gases
06/1979
06/12/1979US4157706 Water heater
04/1979
04/24/1979US4151399 Heat exchange units
04/17/1979US4149591 Heat exchange modules
04/17/1979US4149585 Process and apparatus for heat exchange between fluids
04/03/1979US4147303 Heat-saving smoke pipe attachment
04/03/1979US4147135 Device for reducing flue gas heat losses
03/1979
03/13/1979US4143816 Fireplace heating system
03/06/1979US4142679 Building heating system
02/1979
02/06/1979US4138062 Furnace air circulation system
02/06/1979US4137965 Waste heat recovery system
12/1978
12/12/1978US4129176 Heat recovery systems
11/1978
11/07/1978US4124061 Thermal energy storage unit
10/1978
10/31/1978US4122999 Forced air heating system
10/31/1978US4122801 Waste energy hot water heater
10/24/1978CA1040945A1 Waste water heat recovery unit
10/10/1978US4119080 Heat transfer and conditioning unit
10/03/1978US4117883 Heat retriever
09/1978
09/12/1978CA1038367A2 Package heat exchanger system for heating and cooling
09/05/1978US4111357 High energy saving heat exchanger for furnaces
08/1978
08/08/1978US4105389 Method of winding a tube coil, and an arrangement for performing said method
08/01/1978US4103735 Heat exchanger
06/1978
06/06/1978US4093022 Heat exchanger
04/1978
04/18/1978US4084745 Waste heat utilization system
03/1978
03/21/1978US4079888 Heat recovery system for forced air furnaces
03/21/1978US4079778 Heating system
03/14/1978US4078602 Heat exchanger for recovering waste heat
01/1978
01/03/1978US4066210 Chimney heat reclaimer
11/1977
11/08/1977US4057034 Process fluid cooling system
10/1977
10/11/1977US4053106 System for utilizing heat contained in flue gas
10/11/1977US4052962 Economizer device for exploiting the thermal output of heating installations
10/04/1977US4051898 Static heat-and-moisture exchanger
09/1977
09/27/1977US4050628 Heat reclaimer
09/20/1977US4048962 Water tank heated by smoke from a furnace
08/1977
08/30/1977US4044950 Combined heat-exchanger and supplemental air circulator for hot-air furnaces
08/23/1977US4043014 Method of making a waste flue heat recovery device
08/09/1977US4040804 Water permeable paper sheet
07/1977
07/26/1977US4037786 Energy recovery and storage system
06/1977
06/28/1977US4031862 Heat exchanger for hot flue gases, layer of graphite or carbon
05/1977
05/31/1977US4026353 Heat exchangers
05/31/1977US4026347 Method and apparatus for the alternate heating and cooling of a heat exchanger of a heating and cooling system
05/03/1977US4020895 Method and apparatus for the alternate heating and cooling of a heat exchanger of a heating and cooling apparatus
04/1977
04/19/1977US4018216 Heat exchange apparatus
04/12/1977US4017277 Direct contact water heating system and process
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