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IPC-Stelle: F22D 1/28 1-Punkt Untergruppe [Version 2010.01, Sprache EN - English]

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Symbol		Titel
A Hierarchieinformationen		SECTION A — HUMAN NECESSITIES
B Hierarchieinformationen		SECTION B — PERFORMING OPERATIONS; TRANSPORTING
C Hierarchieinformationen		SECTION C — CHEMISTRY; METALLURGY
D Hierarchieinformationen		SECTION D — TEXTILES; PAPER
E Hierarchieinformationen		SECTION E — FIXED CONSTRUCTIONS
F Hierarchieinformationen		SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
F01 Hierarchieinformationen		ENGINES OR PUMPS
F01 Hierarchieinformationen		MACHINES OR ENGINES IN GENERAL (combustion engines F02; machines for liquids F03, F04); ENGINE PLANTS IN GENERAL; STEAM ENGINES
F02 Hierarchieinformationen		COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01); HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F03 Hierarchieinformationen		MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids F01; positive-displacement machines for liquids F04); WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F04 Hierarchieinformationen		POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS (portable fire extinguishers with manually-operated pumps A62C 11/00, with power-driven pumps A62C 25/00; charging or scavenging combustion engines by pumps F02B; engine fuel-injection pumps F02M; ion pumps H01J 41/12; electrodynamic pumps H02K 44/02)
F15 Hierarchieinformationen		ENGINEERING IN GENERAL
F15 Hierarchieinformationen		FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
F16 Hierarchieinformationen		ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
F17 Hierarchieinformationen		STORING OR DISTRIBUTING GASES OR LIQUIDS (water supply E03B)
F21 Hierarchieinformationen		LIGHTING; HEATING
F21 Hierarchieinformationen		LIGHTING (electric aspects or elements, see section H, e.g. electric light sources H01J, H01K, H05B)
F22 Hierarchieinformationen		STEAM GENERATION (chemical or physical apparatus for generating gases B01J; chemical generation of gas, e.g. under pressure, Section C; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J; generating combustion products of high pressure or high velocity F23R; water heaters not for steam generation F24H, F28; cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers, F28G)
F22B Hierarchieinformationen		METHODS OF STEAM GENERATION; STEAM BOILERS (steam engine plants where engine aspects predominate F01K; domestic central-heating systems using steam F24D; heat exchange or heat transfer in general F28; generation of vapour in the cores of nuclear reactors G21)
F22D Hierarchieinformationen		PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER; FEED-WATER SUPPLY; CONTROLLING WATER LEVEL; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN BOILERS (chemical treatment of water, e.g. purification, C02F; enclosed heat-exchange apparatus in general F28D; controlling in general G05)
F22D 1/00 Hierarchieinformationen		Feed-water heaters, e.g. preheaters
F22D 1/02 Hierarchieinformationen		. with water tubes arranged in the boiler furnace, fire tubes, or flue ways (heat-exchange tubes in general F28F)
F22D 1/04 Hierarchieinformationen		. . the tubes having plain outer surfaces, e.g. in vertical arrangement
F22D 1/06 Hierarchieinformationen		. . . in horizontal arrangement
F22D 1/08 Hierarchieinformationen		. . the tubes having fins, ribs, gills, corrugations, or the like on their outer surfaces, e.g. in vertical arrangement
F22D 1/10 Hierarchieinformationen		. . . in horizontal arrangement (hollow fire-bars, grates, or the like used as water tubes F23H 3/02)
F22D 1/12 Hierarchieinformationen		. . Control devices, e.g. for regulating steam temperature
F22D 1/14 Hierarchieinformationen		. . Safety or venting devices (safety devices for boilers in general F22B 37/42)
F22D 1/16 Hierarchieinformationen		. with water tubes arranged otherwise than in the boiler furnace, fire tubes, or flue ways
F22D 1/18 Hierarchieinformationen		. . and heated indirectly
F22D 1/20 Hierarchieinformationen		. . and directly connected to boilers
F22D 1/22 Hierarchieinformationen		. . and provided for rotary movement
F22D 1/24 Hierarchieinformationen		. with fire tubes or flue ways traversing feed-water vessels
F22D 1/26 Hierarchieinformationen		. with means, other than tubes, to separate water and heating medium, e.g. bulk heaters without internal flues or tubes, jacketted smoke-boxes or flues
F22D 1/28 Hierarchieinformationen		. for direct heat transfer, e.g. by mixing water and steam
F22D 1/30 Hierarchieinformationen		. . with stages, steps, baffles, dishes, circular troughs, or other means to cause interrupted or cascading fall of water
F22D 1/32 Hierarchieinformationen		. arranged to be heated by steam, e.g. bled from turbines
F22D 1/34 Hierarchieinformationen		. . and returning condensate to boiler with main feed supply
F22D 1/36 Hierarchieinformationen		. Water and air preheating systems
F22D 1/38 Hierarchieinformationen		. . Constructional features of water and air preheating systems
F22D 1/40 Hierarchieinformationen		. Combinations of exhaust-steam and smoke-gas preheaters (for locomotives F22D 1/42)
F22D 1/42 Hierarchieinformationen		. specially adapted for locomotives
F22D 1/44 Hierarchieinformationen		. . Smoke-gas preheaters
F22D 1/46 Hierarchieinformationen		. . Exhaust-steam preheaters
F22D 1/48 Hierarchieinformationen		. . Details
F22D 1/50 Hierarchieinformationen		. incorporating thermal de-aeration of feed-water (de-aeration produced in the course of direct heat transfer F22D 1/28; thermal de-aeration of water per seB01D 19/00, C02F 1/20; valves for venting F16K 24/04) [3]
F22D 3/00 Hierarchieinformationen		Accumulators for preheated water
F22D 5/00 Hierarchieinformationen		Controlling water feed or water level; Automatic water feeding or water-level regulators (steam traps F16T; measuring or indicating instruments G01; for indicating water level G01F; level control in general G05D 9/00)
F22D 7/00 Hierarchieinformationen		Auxiliary devices for promoting water circulation (adaptation of boilers for promoting water circulation F22B 37/34)
F22D 11/00 Hierarchieinformationen		Feed-water supply not provided for in other main groups
F22G Hierarchieinformationen		SUPERHEATING OF STEAM (steam-separating arrangements in boilers F22B 37/26)
F23 Hierarchieinformationen		COMBUSTION APPARATUS; COMBUSTION PROCESSES
F24 Hierarchieinformationen		HEATING; RANGES; VENTILATING (protecting plants by heating in gardens, orchards, or forests A01G 13/06; baking ovens and apparatus A21B; cooking devices other than ranges A47J; forging B21J, B21K; specially adapted for vehicles, see the relevant subclasses of classes B60-B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)
F25 Hierarchieinformationen		REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES
F26 Hierarchieinformationen		DRYING
F27 Hierarchieinformationen		FURNACES; KILNS; OVENS; RETORTS (specially adapted for a purpose covered by a single other class and specifically mentioned in that class, see the class in question, e.g. bakery ovens A21B, glass melting furnaces C03B, coke or gas-making apparatus C10B, C10J, apparatus for cracking hydrocarbons C10G, blast furnaces C21B, converters for making steel C21C, furnaces for heat treatment of metal C21D; furnaces for electroslag or arc remelting of metals C22B 9/00; enamelling ovens C23D; combustion apparatus F23; electric heating H05B) [4]
F28 Hierarchieinformationen		HEAT EXCHANGE IN GENERAL (heat-transfer, heat-exchange or heat-storage materials C09K 5/00; arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F24F 13/30)
F41 Hierarchieinformationen		WEAPONS; BLASTING
F41 Hierarchieinformationen		WEAPONS
F42 Hierarchieinformationen		AMMUNITION; BLASTING
F99 Hierarchieinformationen		SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
G Hierarchieinformationen		SECTION G — PHYSICS
H Hierarchieinformationen		SECTION H — ELECTRICITY

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