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IPC-Stelle: F22D 1/28 1-Punkt Untergruppe [Version 2013.01, 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; ENGINE PLANTS IN GENERAL; STEAM ENGINES
F02 Hierarchieinformationen		COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F03 Hierarchieinformationen		MACHINES OR ENGINES FOR LIQUIDS; 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
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
F21 Hierarchieinformationen		LIGHTING; HEATING
F21 Hierarchieinformationen		LIGHTING
F22 Hierarchieinformationen		STEAM GENERATION
F22B Hierarchieinformationen		METHODS OF STEAM GENERATION; STEAM BOILERS (steam engine plants where engine aspects predominate F01K; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J 3/00; 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; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J 3/00)
F23 Hierarchieinformationen		COMBUSTION APPARATUS; COMBUSTION PROCESSES
F24 Hierarchieinformationen		HEATING; RANGES; VENTILATING
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 [4]
F28 Hierarchieinformationen		HEAT EXCHANGE IN GENERAL
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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