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Indent Level
Color Curly Brackets (indicating CPC extensions to IPC)

CPC
COOPERATIVE PATENT CLASSIFICATION
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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; nuclear power plants, engine arrangements therein G21D)
NOTE
-
Attention is drawn to the notes preceding class F01, especially as regards the definitions of "steam" and "special vapour".

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Steam accumulators (use of accumulators in steam engine plants F01K 3/00)
F01K 1/02
.
for storing steam otherwise than in a liquid
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F01K 1/04
.
for storing steam in a liquid, e.g. Ruth`s type (in alkali to increase steam pressure F22B 1/20)
F01K 1/06
. .
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)
F01K 1/08
.
Charging or discharging of accumulators with steam (peculiar to multiple accumulators F01K 1/12)
F01K 1/10
.
specially adapted for superheated steam
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F01K 1/12
.
Multiple accumulators; Charging, discharging or regulating peculiar thereto
F01K 1/14
. .
Circulation
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F01K 1/16
.
Other safety or regulating means
F01K 1/18
. .
for steam pressure
F01K 1/20
.
Other steam-accumulator parts, details, or accessories
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Guide Heading:
Steam engine plants
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Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00)
F01K 3/002
.
{
Steam conversion
}
F01K 3/004
.
{
Accumulation in the liquid branch of the circuit
}
F01K 3/006
.
{
Accumulators and steam compressors
}
F01K 3/008
.
{
Use of steam accumulators of the Ruth type for storing steam in water; Regulating thereof (Ruth accumulators per se F01K 1/04)
}
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F01K 3/02
.
Use of accumulators and specific engine types; Regulating thereof
F01K 3/04
. .
the engine being of multiple-inlet-pressure type
F01K 3/06
.
the engine being of extraction or non-condensing type
{
(F01K 3/004 takes precedence)
}
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F01K 3/08
.
Use of accumulators and the plant being specially adapted for a specific use
F01K 3/10
. .
for vehicle drive, e.g. for accumulator locomotives
F01K 3/12
.
having two or more accumulators
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F01K 3/14
.
having both steam accumulator and heater, e.g. superheating accumulator (steam superheaters per se F22G)
F01K 3/16
. .
Mutual arrangement of accumulator and heater
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F01K 3/18
.
having heaters (having both steam accumulator and heater F01K 3/14; steam heaters per se F22)
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F01K 3/181
. .
{
using nuclear heat (F01K 3/26 takes precedence)
}
F01K 3/183
. . .
{
one heater being a fired superheater
}
F01K 3/185
. .
{
using waste heat from outside the plant (F02G 5/00 takes precedence)
}
F01K 3/186
. .
{
using electric heat
}
F01K 3/188
. .
{
using heat from a specified chemical reaction
}
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F01K 3/20
. .
with heating by combustion gases of main boiler
F01K 3/205
. . .
{
more than one circuit being heated by one boiler
}
F01K 3/22
. . .
Controlling, e.g. starting, stopping (F01K 7/00, F01K 13/02 take precedence)
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F01K 3/24
. .
with heating by separately-fired heaters
F01K 3/242
. . .
{
delivering steam to a common mains
}
F01K 3/245
. . .
{
delivering steam at different pressure levels (F01K 3/247 takes precedence)
}
F01K 3/247
. . .
{
one heater being an incinerator
}
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F01K 3/26
. .
with heating by steam
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F01K 3/262
. . .
{
by means of heat exchangers
}
F01K 3/265
. . . .
{
using live steam for superheating or reheating
}
F01K 3/267
. . .
{
by mixing with steam e.g. LOFFLER-boiler
}
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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
.
used in regenerative installation
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Plants characterised by the use of specific types of engine (F01K 3/02 takes precedence); Plants or engines characterised by their e 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
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F01K 7/02
.
the engines being of multiple-expansion type (the engines being only of turbine type F01K 7/16; the engines using steam of critical or overcritical pressure F01K 7/32; the engines being of extraction or non-condensing type F01K 7/34)
F01K 7/025
. .
{
Consecutive expansion in a turbine or a positive displacement engine
}
F01K 7/04
. .
Regulating means peculiar thereto
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F01K 7/06
.
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)
F01K 7/08
. .
Regulating means peculiar thereto
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F01K 7/10
.
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
. .
of condensing type
F01K 7/14
. . .
Regulating means peculiar thereto
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F01K 7/16
.
the engines being only of turbine type (the engines using steam of critical or overcritical pressure F01K 7/32; the engines being of extraction or non-condensing type F01K 7/34)
F01K 7/165
. .
{
Regulating means specially adapted therefor
}
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F01K 7/18
. .
the turbine being of multiple-inlet-pressure type
F01K 7/20
. . .
Regulating means peculiar thereto
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F01K 7/22
. .
the turbines having inter-stage steam heating
F01K 7/223
. . .
{
Inter-stage moisture separation
}
F01K 7/226
. . .
{
Inter-stage steam injection
}
F01K 7/24
. . .
Regulating or safety means peculiar thereto
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F01K 7/26
. .
the turbines having inter-stage steam accumulation
F01K 7/28
. . .
Regulating means peculiar thereto
F01K 7/30
. .
the turbines using exhaust steam only
F01K 7/32
.
the engines using steam of critical or overcritical pressure
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F01K 7/34
.
the engines being of extraction or non-condensing type; Use of steam for feed-water heating (feed-water heaters in general F22D)
F01K 7/345
. .
{
Control or safety-means particular thereto
}
F01K 7/36
. .
the engines being of positive-displacement type
F01K 7/38
. .
the engines being of turbine type
F01K 7/40
. .
Use of two or more feed-water heaters in series
F01K 7/42
. .
Use of desuperheaters for feed-water heating
F01K 7/44
. .
Use of steam for feed-water heating and another purpose
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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 23/04 takes precedence)
F01K 9/003
.
{
condenser cooling circuits
}
F01K 9/006
.
{
Vacuum-breakers
}
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F01K 9/02
.
Arrangements or modifications of condensate or air pumps
F01K 9/023
. .
{
Control thereof
}
F01K 9/026
. .
{
Returning condensate by capillarity
}
F01K 9/04
.
with dump valves to by-pass stages
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Plants characterised by the engines being structurally combined with boilers or condensers
F01K 11/02
.
the engines being turbines
F01K 11/04
.
the boilers or condensers being rotated in use
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General lay-out or general methods of operation of complete plants
F01K 13/003
.
{
Arrangements for measuring or testing (in general G01)
}
F01K 13/006
.
{
Auxiliaries or details not otherwise provided for
}
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F01K 13/02
.
Regulating, e.g. stopping or starting
F01K 13/025
. .
{
Cooling the interior by injection during idling or stand-by
}
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Adaptations of plants for special use
{
F01K 7/02 takes precedence
}
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F01K 15/02
.
for driving vehicles, e.g. locomotives (arrangements in vehicles, see the relevant vehicle classes)
F01K 15/025
. .
{
the vehicle being a steam locomotive
}
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F01K 15/04
. .
the vehicles being waterborne vessels
F01K 15/045
. . .
{
Control thereof (F01K 3/22, F01K 7/00, F01K 13/02 take precedence)
}
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Using steam or condensate extracted or exhausted from steam engine plant (for heating feed-water F01K 7/34; returning condensate to boiler F22D)
{
F01K 7/36 takes precedence
}
F01K 17/005
.
{
by means of a heat pump (heat pumps systems per se F25B)
}
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F01K 17/02
.
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)
F01K 17/025
. .
{
in combination with at least one gas turbine, e.g. a combustion gas turbine
}
F01K 17/04
.
for specific purposes other than heating (F01K 17/06 takes precedence)
F01K 17/06
.
Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
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Regenerating or otherwise treating steam exhausted 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 3/006 takes precedence
}
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F01K 19/02
.
Regenerating by compression
F01K 19/04
. .
in combination with cooling or heating
F01K 19/06
. .
in engine cylinder
F01K 19/08
. .
compression done by injection apparatus, jet blower, or the like
F01K 19/10
.
Cooling exhaust steam other than by condenser; Rendering exhaust steam invisible
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Steam engine plants not otherwise provided for
F01K 21/005
.
{
using mixtures of liquid and steam or evaporation of a liquid by expansion
}
F01K 21/02
.
with steam-generation in engine-cylinders
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F01K 21/04
.
using mixtures of steam and gas; Plants generating or heating steam by bringing water or steam into direct contact with hot gas (
{
F01K 25/005, F02B 47/02 take precedence; injecting water or steam into a as gas turbine plant F02C 3/305
}
; direct-contact steam generators in general F22B)
F01K 21/042
. .
{
pure steam being expanded in a motor somewhere in the plant (F01K 21/045 takes precedence)
}
F01K 21/045
. .
{
Introducing gas and steam separately into the motor, e.g. admission to a single rotor through separate nozzles
}
F01K 21/047
. .
{
having at least one combustion gas turbine
}
F01K 21/06
.
Treating live steam, other than thermo-dynamically, e.g. for fighting deposits in engine
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Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
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F01K 23/02
.
the engine cycles being thermally coupled
F01K 23/04
. .
condensation heat from one cycle heating the fluid in another cycle
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F01K 23/06
. .
combustion heat from one cycle heating the fluid in another cycle
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F01K 23/061
. . .
{
with combustion in a fluidised bed (plants with a fluidised-bed combustor comprising only gas-turbines F02C 3/205; fluidised-bed apparatus per se B01J 8/18; fluidised-bed combustors F23C 10/00; fluidised-bed steam-boilers F22B 31/0007)
}
F01K 23/062
. . . .
{
the combustion bed being pressurised (pressurised fluid bed combustion per se F23C 10/16)
}
F01K 23/064
. . .
{
in combination with an industrial process e.g. chemical, metallurgical (particularly adapted for a specific process see the relevant classes)
}
F01K 23/065
. . .
{
the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
}
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F01K 23/067
. . .
{
the combustion heat coming from a gasification or pyrolysis process, e.g. coal gasification (gas turbines with fuel gasifiers F02C 3/28)
}
F01K 23/068
. . . .
{
in combination with an oxygen producing plant, e.g. an air separation plant
}
F01K 23/08
. . .
with working fluid of one cycle heating the fluid in another cycle
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F01K 23/10
. . .
with exhaust fluid of one cycle heating the fluid in another cycle (F01K 17/025 takes precedence)
F01K 23/101
. . . .
{
Regulating means specially adapted therefor (F01K 23/105, F01K 23/108 take precedence)
}
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F01K 23/103
. . . .
{
with afterburner in exhaust boiler
}
F01K 23/105
. . . . .
{
Regulating means specially adapted therefor
}
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F01K 23/106
. . . .
{
with water evaporated or preheated at different pressures in exhaust boiler
}
F01K 23/108
. . . . .
{
Regulating means specially adapted therefor
}
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F01K 23/12
.
the engines being mechanically coupled (F01K 23/02 takes precedence)
F01K 23/14
. .
including at least one combustion engine
F01K 23/16
. .
all the engines being turbines (F01K 23/14 takes precedence)
F01K 23/18
.
characterised by adaptation for specific use
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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 25/005
.
{
the working fluid being steam, created by combustion of hydrogen with oxygen
}
F01K 25/02
.
the fluid remaining in the liquid phase
F01K 25/04
.
the fluid being in different phase, e.g. foamed
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F01K 25/06
.
using mixtures of different fluids (plants using mixtures of steam and gas F01K 21/04)
F01K 25/065
. .
{
with an absorption fluid remaining at least partly in the liquid state, e.g. water for ammonia (F01K 5/00 takes precedence)
}
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F01K 25/08
.
using special vapours
F01K 25/085
. .
{
the vapour being sulfur
}
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F01K 25/10
. .
the vapours being cold, e.g. ammonia, carbon dioxide, ether
F01K 25/103
. . .
{
Carbon dioxide (F01K 25/065 takes precedence)
}
F01K 25/106
. . .
{
Ammonia (F01K 25/065 takes precedence)
}
F01K 25/12
. .
the vapours being metallic, e.g. mercury
F01K 25/14
. .
using industrial or other waste gases
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Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
F01K 27/005
.
{
by means of hydraulic motors
}
F01K 27/02
.
Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
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Last Modified: 10/10/2013