| F | SK | MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
| F01 | USK | ENGINES OR PUMPS |
| F01 | KL | MACHINES OR ENGINES IN GENERAL (combustion engines F02; machines for liquids F03 , F04); ENGINE PLANTS IN GENERAL; STEAM ENGINES |
| F01K | UKL | STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; steam generation F22; nuclear power plants, engine arrangements therein G21D) |
| F01K 1/00 | HGR | Steam accumulators (use of accumulators in steam engine plants F01K 3/00) |
| F01K 1/02 | UGR1 | | . | for storing steam otherwise than in a liquid |
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| F01K 1/04 | UGR1 | | . | for storing steam in a liquid, e.g. Ruth type (in alkali to increase steam pressure F22B 1/20) |
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| F01K 1/06 | UGR2 | | . . | Internal fittings facilitating steam distribution, steam formation, or circulation (acting during charging or discharging F01K 1/08; fittings facilitating circulation through multiple accumulators F01K 1/14) |
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| F01K 1/08 | UGR1 | | . | Charging or discharging of accumulators with steam (peculiar to multiple accumulators F01K 1/12) |
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| F01K 1/10 | UGR1 | | . | specially adapted for superheated steam |
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| F01K 1/12 | UGR1 | | . | Multiple accumulators; Charging, discharging, or regulating peculiar thereto |
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| F01K 1/14 | UGR2 | |
| F01K 1/16 | UGR1 | | . | Other safety or regulating means |
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| F01K 1/18 | UGR2 | |
| F01K 1/20 | UGR1 | | . | Other steam-accumulator parts, details, or accessories |
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| F01K 3/00 | HGR | Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) |
| F01K 3/02 | UGR1 | | . | Use of accumulators and specific engine types; Regulating thereof |
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| F01K 3/04 | UGR2 | | . . | the engine being of multiple-inlet-pressure type |
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| F01K 3/06 | UGR2 | | . . | the engine being of extraction or non-condensing type |
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| F01K 3/08 | UGR1 | | . | Use of accumulators, the plant being specially adapted for a specific use |
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| F01K 3/10 | UGR2 | | . . | for vehicle drive, e.g. for accumulator locomotives |
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| F01K 3/12 | UGR1 | | . | having two or more accumulators |
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| F01K 3/14 | UGR1 | | . | having both steam accumulator and heater, e.g. superheating accumulator (steam superheaters per se F22G) |
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| F01K 3/16 | UGR2 | | . . | Mutual arrangement of accumulator and heater |
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| F01K 3/18 | UGR1 | | . | having heaters (having both steam accumulator and heater F01K 3/14; steam heaters per se F22) |
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| F01K 3/20 | UGR2 | | . . | with heating by combustion gases of main boiler |
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| F01K 3/22 | UGR3 | | . . . | Controlling, e.g. starting, stopping |
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| F01K 3/24 | UGR2 | | . . | with heating by separately-fired heaters |
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| F01K 3/26 | UGR2 | |
| F01K 5/00 | HGR | Plants characterised by use of means for storing steam in an alkali to increase steam pressure, e.g. of Honigmann or Koenemann type |
| F01K 5/02 | UGR1 | | . | used in regenerative installation |
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| F01K 7/00 | HGR | Plants characterised by the use of specific types of engine (F01K 3/02 takes precedence); Plants or engines characterised by their use of special steam systems, cycles, or processes (reciprocating-piston engines using uniflow principle F01B 17/04); Regulating means peculiar to such systems, cycles, or processes; Use of withdrawn or exhaust steam for feed-water heating |
| F01K 7/02 | UGR1 | | . | the engines being of multiple-expansion type (the engines being only of turbine type F01K 7/16; the engines using steam of critical or over-critical pressure F01K 7/32; the engines being of extraction or non-condensing type F01K 7/34) |
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| F01K 7/04 | UGR2 | | . . | Regulating means peculiar thereto |
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| F01K 7/06 | UGR1 | | . | the engines being of multiple-inlet-pressure type (F01K 7/02 takes precedence; the engines being only of turbine type F01K 7/16; the engines using steam of critical or over-critical pressure F01K 7/32; the engines being of extraction or non-condensing type F01K 7/34) |
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| F01K 7/08 | UGR2 | | . . | Regulating means peculiar thereto |
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| F01K 7/10 | UGR1 | | . | characterised by the engine exhaust pressure (the engines being only of turbine type F01K 7/16; the engines using steam of critical or over-critical pressure F01K 7/32; the engines being of extraction or non-condensing type F01K 7/34) |
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| F01K 7/12 | UGR2 | |
| F01K 7/14 | UGR3 | | . . . | Regulating means peculiar thereto |
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| F01K 7/16 | UGR1 | | . | the engines being only of turbine type (the engines using steam of critical or over-critical pressure F01K 7/32; the engines being of extraction or non-condensing type F01K 7/34) |
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| F01K 7/18 | UGR2 | | . . | the turbine being of multiple-inlet-pressure type |
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| F01K 7/20 | UGR3 | | . . . | Regulating means peculiar thereto |
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| F01K 7/22 | UGR2 | | . . | the turbines having inter-stage steam heating |
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| F01K 7/24 | UGR3 | | . . . | Regulating or safety means peculiar thereto |
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| F01K 7/26 | UGR2 | | . . | the turbines having inter-stage steam accumulation |
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| F01K 7/28 | UGR3 | | . . . | Regulating means peculiar thereto |
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| F01K 7/30 | UGR2 | | . . | the turbines using exhaust steam only |
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| F01K 7/32 | UGR1 | | . | the engines using steam of critical or over-critical pressure |
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| F01K 7/34 | UGR1 | | . | the engines being of extraction or non-condensing type; Use of steam for feed-water heating (feed-water heaters in general F22D) |
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| F01K 7/36 | UGR2 | | . . | the engines being of positive-displacement type |
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| F01K 7/38 | UGR2 | | . . | the engines being of turbine type |
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| F01K 7/40 | UGR2 | | . . | Use of two or more feed-water heaters in series |
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| F01K 7/42 | UGR2 | | . . | Use of desuperheaters for feed-water heating |
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| F01K 7/44 | UGR2 | | . . | Use of steam for feed-water heating and another purpose |
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| F01K 9/00 | HGR | Plants characterised by condensers arranged or modified to co-operate with the engines (by condensers structurally combined with engines F01K 11/00; steam condensers per se F28B) |
| F01K 9/02 | UGR1 | | . | Arrangements or modifications of condensate or air pumps |
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| F01K 9/04 | UGR1 | | . | with dump valves to by-pass stages |
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| F01K 11/00 | HGR | Plants characterised by the engines being structurally combined with boilers or condensers |
| F01K 11/02 | UGR1 | | . | the engines being turbines |
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| F01K 11/04 | UGR1 | | . | the boilers or condensers being rotated in use |
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| F01K 13/00 | HGR | General layout or general methods of operation, of complete plants |
| F01K 13/02 | UGR1 | | . | Regulating, e.g. stopping or starting |
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| F01K 15/00 | HGR | Adaptations of plants for special use |
| F01K 15/02 | UGR1 | | . | for driving vehicles, e.g. locomotives (arrangements in vehicles, see the relevant vehicle classes) |
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| F01K 15/04 | UGR2 | | . . | the vehicles being waterborne vessels |
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| F01K 17/00 | HGR | Use of steam or condensate extracted or exhausted from steam engine plant (for heating feed-water F01K 7/34; returning condensate to boiler F22D) |
| F01K 17/02 | UGR1 | | . | for heating purposes, e.g. industrial, domestic (F01K 17/06 takes precedence; domestic- or space-heating systems, e.g. central-heating systems, in general F24D 1/00 , F24D 3/00 , F24D 9/00) [3] |
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| F01K 17/04 | UGR1 | | . | for specific purposes other than heating (F01K 17/06 takes precedence) |
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| F01K 17/06 | UGR1 | | . | Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel of plant |
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| F01K 19/00 | HGR | Regenerating or otherwise treating steam exhaust from steam engine plant (plants characterised by use of means for storing steam in an alkali to increase steam pressure F01K 5/00; returning condensate to boiler F22D) |
| F01K 19/02 | UGR1 | | . | Regenerating by compression |
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| F01K 19/04 | UGR2 | | . . | in combination with cooling or heating |
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| F01K 19/06 | UGR2 | |
| F01K 19/08 | UGR2 | | . . | compression done by injection apparatus, jet blower, or the like |
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| F01K 19/10 | UGR1 | | . | Cooling exhaust steam other than by condenser; Rendering exhaust steam invisible |
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| F01K 21/00 | HGR | Steam engine plants not otherwise provided for |
| F01K 21/02 | UGR1 | | . | with steam generation in engine cylinders |
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| F01K 21/04 | UGR1 | | . | using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas (direct-contact steam generators in general F22B) |
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| F01K 21/06 | UGR1 | | . | Treating live steam, other than thermodynamically, e.g. for fighting deposits in engine |
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| F01K 23/00 | ZWE |
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| F01K 23/00 | HGR | Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids |
| F01K 23/02 | UGR1 | | . | the engine cycles being thermally coupled |
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| F01K 23/04 | UGR2 | | . . | condensation heat from one cycle heating the fluid in another cycle |
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| F01K 23/06 | UGR2 | | . . | combustion heat from one cycle heating the fluid in another cycle |
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| F01K 23/08 | UGR3 | | . . . | with working fluid of one cycle heating the fluid in another cycle |
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| F01K 23/10 | UGR3 | | . . . | with exhaust fluid of one cycle heating the fluid in another cycle |
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| F01K 23/12 | UGR1 | | . | the engines being mechanically coupled (F01K 23/02 takes precedence) |
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| F01K 23/14 | UGR2 | | . . | including at least one combustion engine |
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| F01K 23/16 | UGR2 | | . . | all the engines being turbines (F01K 23/14 takes precedence) |
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| F01K 23/18 | UGR1 | | . | characterised by adaptation for specific use |
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| F01K 25/00 | HGR | Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for |
| F01K 25/02 | UGR1 | | . | the fluid remaining in the liquid phase |
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| F01K 25/04 | UGR1 | | . | the fluid being in different phases, e.g. foamed |
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| F01K 25/06 | UGR1 | | . | using mixtures of different fluids (plants using mixtures of steam and gas F01K 21/04) |
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| F01K 25/08 | UGR1 | |
| F01K 25/10 | UGR2 | | . . | the vapours being cold, e.g. ammonia, carbon dioxide, ether |
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| F01K 25/12 | UGR2 | | . . | the vapours being metallic, e.g. mercury |
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| F01K 25/14 | UGR2 | | . . | using industrial or other waste gases |
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| F01K 27/00 | HGR | Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for |
| F01K 27/02 | UGR1 | | . | Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat |
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