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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS (steam engine plants, special vapour plants, plants operating on either hot gas or combustion-product gases together with other fluid F01K; gas-turbine plants F02C; jet-propulsion plants F02K); USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
NOTE
-
Attention is drawn to the notes preceding class F01.

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Hot gas positive-displacement engine plants (positive-displacement engine plants characterised by the working gas being generated by combustion in the plant F02G 3/00)
F02G 1/02
.
of open-cycle type
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F02G 1/04
.
of closed-cycle type
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. .
the engine being operated by expansion and contraction of a mass of working gas which is heated and colled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engine
F02G 1/0435
. . .
{
the engine being of the free piston type
}
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. . .
having at least two working members, e.g. pistons, delivering power output
F02G 1/0445
. . . .
{
Engine plants with combined cycles, e.g. Vuilleumier
}
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F02G 1/045
. . .
Controlling
F02G 1/047
. . . .
by varying the heating or cooling
F02G 1/05
. . . .
by varying the rate of flow or quantity of the working gas
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F02G 1/053
. . .
Component parts or details
F02G 1/0535
. . . .
{
Seals or sealing arrangements
}
F02G 1/055
. . . .
Heaters or coolers
F02G 1/057
. . . .
Regenerators
F02G 1/06
.
Controlling
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Positive-displacement engine plants characterised by the working gas being generated by combustion in the plant
F02G 3/02
.
with reciprocating-piston engines
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Profiting from waste heat of combustion engines, not otherwise provided for
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F02G 5/02
.
Profiting from waste heat of exhaust gases
F02G 5/04
. .
in combination with other waste heat from combustion engines
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F02G 2242/00
Ericsson-type engines having open regenerative cycles controlled by valves
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F02G 2242/02
.
Displacer-type engines
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F02G 2242/04
. .
having constant working volume
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F02G 2242/06
. . .
with external drive displacers
F02G 2242/08
. . . .
having gas actuated valves, e.g. "Bush engines"
F02G 2242/10
. . . .
having mechanically actuated valves, e.g. "Gifford" or "McMahon engines"
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F02G 2242/30
. .
having variable working volume
F02G 2242/32
. . .
Regenerative displacers with independent pistons
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F02G 2242/40
.
Piston-type engines
F02G 2242/42
. .
having a single piston regenerative displacer attached to the piston, e.g. "Gifford-McMahon" engines
F02G 2242/44
. .
having two pistons and reverse flow regenerators
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F02G 2243/00
Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
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F02G 2243/02
.
having pistons and displacers in the same cylinder
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F02G 2243/04
. .
Crank-connecting-rod drives
F02G 2243/06
. . .
Regenerative displacers
F02G 2243/08
. . .
External regenerators, e.g. "Rankine Napier" engines
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F02G 2243/20
. .
each having a single free piston, e.g. "Beale engines"
F02G 2243/202
. . .
resonant
F02G 2243/204
. . .
non-resonant
F02G 2243/206
. . .
externally excited
F02G 2243/22
. .
with oscillating cylinders
F02G 2243/24
. .
with free displacers
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F02G 2243/30
.
having their pistons and displacers each in separate cylinders (two-piston machines F02G 2244/00)
F02G 2243/32
. .
Regenerative displacers having parallel cylinder, e.g. "Lauberau" or "Schwartzkopff" engines
F02G 2243/34
. .
Regenerative displacers having their cylinders at right angle, e.g. "Robinson" engines
F02G 2243/36
. .
with twin-expansion cylinders, e.g. "Rainbow" engines
F02G 2243/38
. .
External regenerators having parallel cylinders, e.g. "Heinrici" engines
F02G 2243/40
. .
with free displacers
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F02G 2243/50
. .
having resonance tubes
F02G 2243/52
. . .
acoustic
F02G 2243/54
. . .
thermo-acoustic
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F02G 2244/00
Machines having two pistons
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F02G 2244/02
.
Single-acting two piston engines
F02G 2244/04
. .
of rotary cylinder type, e.g. "Finkelstein" engines
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F02G 2244/06
. .
of stationary cylinder type
F02G 2244/08
. . .
having parallel cylinder, e.g. "Rider" engines
F02G 2244/10
. . .
having cylinders in V-arrangement
F02G 2244/12
. . .
having opposed pistons
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F02G 2244/50
.
Double acting piston machines
F02G 2244/52
. .
having interconnecting adjacent cylinders constituting a single system, e.g. "Rinia" engines
F02G 2244/54
. .
having two-cylinder twin systems, with compression in one cylinder and expansion in the other cylinder for each of the twin systems, e.g. "Finkelstein" engines
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F02G 2250/00
Special cycles or special engines
F02G 2250/03
.
Brayton cycles
F02G 2250/06
.
Beau de Rochas constant volume cycles
F02G 2250/09
.
Carnot cycles in general
F02G 2250/12
.
Malone liquid thermal cycles
F02G 2250/15
.
Sabathe mixed air cycles
F02G 2250/18
.
Vuilleumier cycles
F02G 2250/21
.
Cooke Yarborough engines
F02G 2250/24
.
Ringbom engines, the displacement of the free displacer being obtained by expansion of the heated gas and the weight of the piston
F02G 2250/27
.
Martini Stirling engines
F02G 2250/31
.
Nano or micro engines
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F02G 2253/00
Seals
F02G 2253/01
.
Rotary piston seals
F02G 2253/02
.
Reciprocating piston seals
F02G 2253/03
.
Stem seals
F02G 2253/04
.
Displacer seals
F02G 2253/06
.
Bellow seals
F02G 2253/08
.
Stem with rolling membranes
F02G 2253/10
.
Piston with rolling membranes
F02G 2253/50
.
Liquid seals
F02G 2253/60
.
Sealing of the lubrication circuit
F02G 2253/80
.
Sealing of the crankcase
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F02G 2254/00
Heat inputs
F02G 2254/05
.
by air
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F02G 2254/10
.
by burners
F02G 2254/11
. .
Catalytic burners
F02G 2254/12
.
by ejectors
F02G 2254/15
.
by exhaust gas
F02G 2254/18
.
using deflectors, e.g. spirals
F02G 2254/20
.
using heat transfer tubes
F02G 2254/30
.
using solar radiation
F02G 2254/40
.
using heat accumulators
F02G 2254/45
.
by electric heating
F02G 2254/50
.
Dome arrangements for heat input
F02G 2254/60
.
using air preheaters
F02G 2254/70
.
by catalytic conversion, i.e. flameless oxydation
F02G 2254/90
.
by radioactivity
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F02G 2255/00
Heater tubes
F02G 2255/10
.
dome shaped
F02G 2255/20
.
Heater fins
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F02G 2256/00
Coolers
F02G 2256/02
.
Cooler fins
F02G 2256/04
.
Cooler tubes
F02G 2256/50
.
with coolant circulation
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F02G 2257/00
Regenerators
F02G 2257/02
.
rotating
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F02G 2258/00
Materials used
F02G 2258/10
.
ceramic
F02G 2258/20
.
having heat insulating properties
F02G 2258/50
.
having frictional properties
F02G 2258/80
.
having magnetic properties
F02G 2258/90
.
Processing of materials
F02G 2260/00
Recuperating heat from exhaust gases of combustion engines and heat from cooling circuits
F02G 2262/00
Recuperating heat from exhaust gases of combustion engines and heat from lubrication circuits
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F02G 2270/00
Constructional features
F02G 2270/005
.
Shells, e.g. a sealed or sealing shell for a Stirling engine
F02G 2270/02
.
Pistons for reciprocating and rotating
F02G 2270/04
.
Roller assemblies connecting opposed pistons
F02G 2270/10
.
Rotary pistons
F02G 2270/15
.
Rotating cylinders
F02G 2270/20
.
Plural piston swash plates
F02G 2270/30
.
Displacer assemblies
F02G 2270/40
.
Piston assemblies
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F02G 2270/42
.
Displacer drives
F02G 2270/425
. .
the displacer being driven by a four-bar mechanism, e.g. a rhombic mechanism
F02G 2270/45
.
Piston rods
F02G 2270/50
.
Crosshead guiding pistons
F02G 2270/55
.
Cylinders
F02G 2270/60
.
Counterweights for pistons
F02G 2270/70
.
Liquid pistons
F02G 2270/80
.
Engines without crankshafts
F02G 2270/85
.
Crankshafts
F02G 2270/90
.
Valves
F02G 2270/95
.
Pressurised crankcases
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F02G 2275/00
Controls
F02G 2275/10
.
for vibration reduction
F02G 2275/20
.
for preventing piston over stroke
F02G 2275/30
.
for proper burning
F02G 2275/40
.
for starting
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F02G 2280/00
Output delivery
F02G 2280/005
.
Medical applications, e.g. for prosthesis or artificial hearts
F02G 2280/10
.
Linear generators
F02G 2280/20
.
Rotary generators
F02G 2280/50
.
Compressors or pumps
F02G 2280/60
.
Heat pumps
F02G 2280/70
.
Clutches
F02G 2290/00
Engines characterised by the use of a particular power transfer medium, e.g. Helium
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013