Cooperative Patent Classification

CPC Definition - Subclass F02G

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Last Updated Version: 2016.11
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
Definition statement

This place covers:

Hot-gas or combustion product positive-displacement engine plants and use of waste heat of combustion engines, not otherwise provided for.

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)
Definition statement

This place covers:

Hot gas positive-displacement engine plants, e.g. Stirling engines.

References
Limiting references

This place does not cover:

Steam engine plants, special vapour plants, plants operating on either hot gas or combustion-product gases together with other fluid

Gas-turbine plants

Jet-propulsion plants

Informative references

Attention is drawn to the following places, which may be of interest for search:

Positive-displacement engine plants characterised by the working gas being generated by combustion in the plant

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Plant

an engine together with such additional apparatus as is necessary to run the engine. For example, a steam engine plant includes a steam engine and means for generating the steam.

the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engine
Definition statement

This place covers:

"Stirling" type engines.

Stirling engines are divided in three types:

  • Alpha.

Pairs of sealed pistons in separate cylinders (no displacer).

a. with parallel pistons.

b. with cylinders opposed in line.

c. with cylinders opposed parallel.

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  • Beta.

Piston - displacer arrangement: piston and displacer in the same

cylinder. Cylinder has a hot end and a cool end:

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  • Gamma.

Piston - displacer arrangement : piston and displacer in separate cylinders:

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having at least two working members, e.g. pistons, delivering power output
Definition statement

This place covers:

Stirling type engine having at least two working members, e.g. pistons, delivering power output. E.g. Vuilleumier cycle:

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Positive-displacement engine plants characterised by the working gas being generated by combustion in the plant
Definition statement

This place covers:

Positive-displacement engine plants characterised by the working gas being generated by combustion in the plant, e.g. positive displacement engine plants with external combustion:

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References
Limiting references

This place does not cover:

Stirling engines

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Plant

an engine together with such additional apparatus as is necessary to run the engine. For example, a steam engine plant includes a steam engine and means for generating the steam.

Profiting from waste heat of combustion engines, not otherwise provided for
Definition statement

This place covers:

Profiting from waste heat of combustion engines, not otherwise provided for, e.g. converting heat directly to electric power via a thermoelectric generator using the Seebeck effect or converting the waste heat to mechanical power using a Rankine cycle.

References
Limiting references

This place does not cover:

Vehicle heating derived from propulsion plant

Exhaust or silencing apparatus combined or associated with devices profiting by exhaust heat