1. CPC Sections
  2. CPC Section F
  3. CPC Class F01
  4. CPC Subclass F01K
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
F01K
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) [2018-08]
NOTE

  • Attention is drawn to the notes preceding class F01, especially as regards the definitions of "steam" and "special vapour".
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
F01K 1/00
Steam accumulators (use of accumulators in steam engine plants F01K 3/00) [2013-01]
F01K 1/02
.
for storing steam otherwise than in a liquid [2013-01]
F01K 1/04
.
for storing steam in a liquid, e.g. Ruth's type (in alkali to increase steam pressure F22B 1/20) [2013-01]
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) [2013-01]
F01K 1/08
.
Charging or discharging of accumulators with steam (peculiar to multiple accumulators F01K 1/12) [2013-01]
F01K 1/10
.
specially adapted for superheated steam [2013-01]
F01K 1/12
.
Multiple accumulators; Charging, discharging or control specially adapted therefor [2017-02]
F01K 1/14
. .
Circulation [2013-01]
F01K 1/16
.
Other safety or control means [2017-02]
F01K 1/18
. .
for steam pressure [2013-01]
F01K 1/20
.
Other steam-accumulator parts, details, or accessories [2013-01]
Steam engine plants [2013-01]
F01K 3/00
Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein (regenerating exhaust steam F01K 19/00) [2013-01]
F01K 3/002
.
{Steam conversion} [2013-01]
F01K 3/004
.
{Accumulation in the liquid branch of the circuit} [2013-01]
F01K 3/006
.
{Accumulators and steam compressors} [2013-01]
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)} [2013-01]
F01K 3/02
.
Use of accumulators and specific engine types; Control thereof [2017-02]
F01K 3/04
. .
the engine being of multiple-inlet-pressure type [2013-01]
F01K 3/06
.
the engine being of extraction or non-condensing type {(F01K 3/004 takes precedence)} [2013-01]
F01K 3/08
.
Use of accumulators and the plant being specially adapted for a specific use [2013-01]
F01K 3/10
. .
for vehicle drive, e.g. for accumulator locomotives [2013-01]
F01K 3/12
.
having two or more accumulators [2013-01]
F01K 3/14
.
having both steam accumulator and heater, e.g. superheating accumulator (steam superheaters per se F22G) [2013-01]
F01K 3/16
. .
Mutual arrangement of accumulator and heater [2013-01]
F01K 3/18
.
having heaters (having both steam accumulator and heater F01K 3/14; steam heaters per se F22) [2013-01]
F01K 3/181
. .
{using nuclear heat (F01K 3/26 takes precedence)} [2013-01]
F01K 3/183
. . .
{one heater being a fired superheater} [2013-01]
F01K 3/185
. .
{using waste heat from outside the plant (F02G 5/00 takes precedence)} [2013-01]
F01K 3/186
. .
{using electric heat} [2013-01]
F01K 3/188
. .
{using heat from a specified chemical reaction} [2013-01]
F01K 3/20
. .
with heating by combustion gases of main boiler [2013-01]
F01K 3/205
. . .
{more than one circuit being heated by one boiler} [2013-01]
F01K 3/22
. . .
Controlling, e.g. starting, stopping (F01K 7/00, F01K 13/02 take precedence) [2013-01]
F01K 3/24
. .
with heating by separately-fired heaters [2013-01]
F01K 3/242
. . .
{delivering steam to a common mains} [2013-01]
F01K 3/245
. . .
{delivering steam at different pressure levels (F01K 3/247 takes precedence)} [2013-01]
F01K 3/247
. . .
{one heater being an incinerator} [2013-01]
F01K 3/26
. .
with heating by steam [2013-01]
F01K 3/262
. . .
{by means of heat exchangers} [2013-01]
F01K 3/265
. . . .
{using live steam for superheating or reheating} [2013-01]
F01K 3/267
. . .
{by mixing with steam, e.g. LOFFLER-boiler} [2016-08]
F01K 5/00
Plants characterised by use of means for storing steam in an alkali to increase steam pressure, e.g. of Honigmann or Koenemann type [2013-01]
F01K 5/02
.
used in regenerative installation [2013-01]
F01K 7/00
Steam engine 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); Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating [2017-02]
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) [2013-01]
F01K 7/025
. .
{Consecutive expansion in a turbine or a positive displacement engine} [2013-01]
F01K 7/04
. .
Control means specially adapted therefor [2017-02]
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) [2013-01]
F01K 7/08
. .
Control means specially adapted therefor [2017-02]
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) [2013-01]
F01K 7/12
. .
of condensing type [2013-01]
F01K 7/14
. . .
Control means specially adapted therefor [2017-02]
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) [2013-01]
F01K 7/165
. .
{Controlling means specially adapted therefor} [2017-02]
F01K 7/18
. .
the turbine being of multiple-inlet-pressure type [2013-01]
F01K 7/20
. . .
Control means specially adapted therefor [2017-02]
F01K 7/22
. .
the turbines having inter-stage steam heating [2013-01]
F01K 7/223
. . .
{Inter-stage moisture separation} [2013-01]
F01K 7/226
. . .
{Inter-stage steam injection} [2013-01]
F01K 7/24
. . .
Control or safety means specially adapted therefor [2017-02]
F01K 7/26
. .
the turbines having inter-stage steam accumulation [2013-01]
F01K 7/28
. . .
Control means specially adapted therefor [2017-02]
F01K 7/30
. .
the turbines using exhaust steam only [2013-01]
F01K 7/32
.
the engines using steam of critical or overcritical pressure [2013-01]
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) [2013-01]
F01K 7/345
. .
{Control or safety-means particular thereto} [2013-01]
F01K 7/36
. .
the engines being of positive-displacement type [2013-01]
F01K 7/38
. .
the engines being of turbine type [2013-01]
F01K 7/40
. .
Use of two or more feed-water heaters in series [2013-01]
F01K 7/42
. .
Use of desuperheaters for feed-water heating [2013-01]
F01K 7/44
. .
Use of steam for feed-water heating and another purpose [2013-01]
F01K 9/00
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) [2013-01]
F01K 9/003
.
{condenser cooling circuits} [2013-01]
F01K 9/006
.
{Vacuum-breakers} [2013-01]
F01K 9/02
.
Arrangements or modifications of condensate or air pumps [2013-01]
F01K 9/023
. .
{Control thereof} [2013-01]
F01K 9/026
. .
{Returning condensate by capillarity} [2013-01]
F01K 9/04
.
with dump valves to by-pass stages [2013-01]
F01K 11/00
Plants characterised by the engines being structurally combined with boilers or condensers [2013-01]
F01K 11/02
.
the engines being turbines [2013-01]
F01K 11/04
.
the boilers or condensers being rotated in use [2013-01]
F01K 13/00
General layout or general methods of operation of complete plants [2017-08]
F01K 13/003
.
{Arrangements for measuring or testing (in general G01)} [2013-01]
F01K 13/006
.
{Auxiliaries or details not otherwise provided for} [2013-01]
F01K 13/02
.
Controlling, e.g. stopping or starting [2017-02]
F01K 13/025
. .
{Cooling the interior by injection during idling or stand-by} [2013-01]
F01K 15/00
Adaptations of plants for special use {(F01K 7/02 takes precedence)} [2013-01]
F01K 15/02
.
for driving vehicles, e.g. locomotives [2024-01]
F01K 15/025
. .
{the vehicle being a steam locomotive} [2013-01]
F01K 15/04
. .
the vehicles being waterborne vessels [2013-01]
F01K 15/045
. . .
{Control thereof (F01K 3/22, F01K 7/00, F01K 13/02 take precedence)} [2013-01]
F01K 17/00
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}) [2013-01]
F01K 17/005
.
{by means of a heat pump (heat pumps systems per se F25B)} [2013-01]
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) [2013-01]
F01K 17/025
. .
{in combination with at least one gas turbine, e.g. a combustion gas turbine} [2013-01]
F01K 17/04
.
for specific purposes other than heating (F01K 17/06 takes precedence) [2013-01]
F01K 17/06
.
Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant [2013-01]
F01K 19/00
Regenerating or otherwise treating steam exhausted from steam engine plant ({F01K 3/006 takes precedence} plants characterised by use of means for storing steam in an alkali to increase steam pressure F01K 5/00; returning condensate to boiler F22D) [2013-01]
F01K 19/02
.
Regenerating by compression [2013-01]
F01K 19/04
. .
in combination with cooling or heating [2013-01]
F01K 19/06
. .
in engine cylinder [2013-01]
F01K 19/08
. .
compression done by injection apparatus, jet blower, or the like [2013-01]
F01K 19/10
.
Cooling exhaust steam other than by condenser; Rendering exhaust steam invisible [2013-01]
F01K 21/00
Steam engine plants not otherwise provided for [2013-01]
F01K 21/005
.
{using mixtures of liquid and steam or evaporation of a liquid by expansion} [2013-01]
F01K 21/02
.
with steam-generation in engine-cylinders [2013-01]
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) [2013-01]
F01K 21/042
. .
{pure steam being expanded in a motor somewhere in the plant (F01K 21/045 takes precedence)} [2013-01]
F01K 21/045
. .
{Introducing gas and steam separately into the motor, e.g. admission to a single rotor through separate nozzles} [2013-01]
F01K 21/047
. .
{having at least one combustion gas turbine} [2013-01]
F01K 21/06
.
Treating live steam, other than thermodynamically, e.g. for fighting deposits in engine [2017-08]
F01K 23/00
Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids [2013-01]
F01K 23/02
.
the engine cycles being thermally coupled [2013-01]
F01K 23/04
. .
condensation heat from one cycle heating the fluid in another cycle [2013-01]
F01K 23/06
. .
combustion heat from one cycle heating the fluid in another cycle [2013-01]
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)} [2013-01]
F01K 23/062
. . . .
{the combustion bed being pressurised (pressurised fluid bed combustion per se F23C 10/16)} [2013-01]
F01K 23/064
. . .
{in combination with an industrial process, e.g. chemical, metallurgical} [2024-01]
F01K 23/065
. . .
{the combustion taking place in an internal combustion piston engine, e.g. a diesel engine} [2013-01]
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)} [2013-01]
F01K 23/068
. . . .
{in combination with an oxygen producing plant, e.g. an air separation plant} [2013-01]
F01K 23/08
. . .
with working fluid of one cycle heating the fluid in another cycle [2013-01]
F01K 23/10
. . .
with exhaust fluid of one cycle heating the fluid in another cycle (F01K 17/025 takes precedence) [2013-01]
F01K 23/101
. . . .
{Regulating means specially adapted therefor (F01K 23/105, F01K 23/108 take precedence)} [2013-01]
F01K 23/103
. . . .
{with afterburner in exhaust boiler} [2013-01]
F01K 23/105
. . . . .
{Regulating means specially adapted therefor} [2013-01]
F01K 23/106
. . . .
{with water evaporated or preheated at different pressures in exhaust boiler} [2013-01]
F01K 23/108
. . . . .
{Regulating means specially adapted therefor} [2013-01]
F01K 23/12
.
the engines being mechanically coupled (F01K 23/02 takes precedence) [2013-01]
F01K 23/14
. .
including at least one combustion engine [2013-01]
F01K 23/16
. .
all the engines being turbines (F01K 23/14 takes precedence) [2013-01]
F01K 23/18
.
characterised by adaptation for specific use [2013-01]
F01K 25/00
Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for [2013-01]
F01K 25/005
.
{the working fluid being steam, created by combustion of hydrogen with oxygen} [2013-01]
F01K 25/02
.
the fluid remaining in the liquid phase [2013-01]
F01K 25/04
.
the fluid being in different phases, e.g. foamed [2017-08]
F01K 25/06
.
using mixtures of different fluids (plants using mixtures of steam and gas F01K 21/04) [2013-01]
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)} [2013-01]
F01K 25/08
.
using special vapours [2013-01]
F01K 25/085
. .
{the vapour being sulfur} [2013-01]
F01K 25/10
. .
the vapours being cold, e.g. ammonia, carbon dioxide, ether [2013-01]
F01K 25/103
. . .
{Carbon dioxide (F01K 25/065 takes precedence)} [2013-01]
F01K 25/106
. . .
{Ammonia (F01K 25/065 takes precedence)} [2013-01]
F01K 25/12
. .
the vapours being metallic, e.g. mercury [2013-01]
F01K 25/14
. .
using industrial or other waste gases [2013-01]
F01K 27/00
Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for [2013-01]
F01K 27/005
.
{by means of hydraulic motors} [2013-01]
F01K 27/02
.
Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat [2013-01]