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GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; gas-turbine combustion chambers F23R; using gas turbines in compression refrigeration plants F25B11/00 ; using gas-turbine plants in vehicles, see the relevant vehicle classes)
Definition statement
This subclass/group covers:
References relevant to classification in this subclass
This subclass/group does not cover:
Special rules of classification within this subclass
In this subclass the Indexing Code scheme R05D is used as follows:
Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid (by the use of combustion product F02C3/00, F02C5/00 )
Definition statement
This subclass/group covers:
Gas-turbine plants characterised by the use of hot gases or unheated pressurised gases, as the working fluid, e.g. heated indirectly by solar power, nuclear power or the like; unheated pressurized gas that is stored and prior to use the expansion of the pressurized gas is used to drive a turbine;
Informative references
Attention is drawn to the following places, which may be of interest for search:
Gas-turbine plants characterised by the use of combustion products as the working fluid (generated by intermittent combustion F02C5/00 )
Informative references
Attention is drawn to the following places, which may be of interest for search:
Gas-turbine plants characterised by the working fluid being generated by intermittent combustion
Definition statement
This subclass/group covers:
Gas-turbine plants characterised by the working fluid being generated by intermittent combustion, i.e. non continuous combustion e.g. in a combustion chamber having valves
 taken from FR2210718
Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output (F02C6/18 takes precedence; [N: for a fluidised-bed combustor F02C3/205 ])
Informative references
Attention is drawn to the following places, which may be of interest for search:
Special rules of classification within this group
providing compressed gas (F02C6/10 takes precedence)
Special rules of classification within this group
the gas being bled from the gas-turbine compressor
Informative references
Attention is drawn to the following places, which may be of interest for search:
Special rules of classification within this group
supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
Special rules of classification within this group
Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
Definition statement
This subclass/group covers:
Either turbochargers and details thereof if not covered elsewhere or plants/cycles with supercharging apparatuses or processes
 taken from US2006016196
References relevant to classification in this group
This subclass/group does not cover:
Special rules of classification within this group
Use F05D 2220/40 for classifying additional information
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants (using waste heat as source of energy for refrigeration plants F25B27/02; using the waste heat of a gasturbine for steam generation or in a steam cycle see F01K23/10 )
Informative references
Attention is drawn to the following places, which may be of interest for search:
Special rules of classification within this group
Do not classify here if gas turbine is just an otherwise unspecific feature of a HRSG system, consider F01K and subgroups instead
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Features, components parts, details or accessories, not provided for in, or of interest apart from groups F02C1/00 to F02C6/00; air intakes for jet-propulsion plants (controlling F02C9/00 )
Informative references
Attention is drawn to the following places, which may be of interest for search:
having provisions for obviating the penetration of damaging objects or particles
Relationship between large subject matter areas
Separation of particles from gases in general: B01D 45/00
Fuel supply systems
References relevant to classification in this group
This subclass/group does not cover:
Heating fuel before feeding to the burner
Definition statement
This subclass/group covers:
Illustrative example of subject matter classified in this group: US6105370
 Relationship between large subject matter areas
Relates to F02C 7/08, F02C 7/10 and F02C 7/105 or F02C 7/12, i.e. cooling potential of the fuel is used for cooling purposes in other parts of the engine;
Starting drives for the rotor, [N: acting directly on the rotor of the gas turbine to be started]
Special rules of classification within this group
Fluid drives (turbine starters F02C7/277 )
Informative references
Attention is drawn to the following places, which may be of interest for search:
Special rules of classification within this group
generated by cartridges
Special rules of classification within this group
Mechanical drives
Special rules of classification within this group
the starter being a [N: separate] turbine
Special rules of classification within this group
Arrangement of seals
Definition statement
This subclass/group covers:
Arrangement of seals in a gas or steam turbine in a macroscopic sense
 taken from US2010284782
Relationship between large subject matter areas
For details of seals in gas turbine applications: F01D 11/00.
Sealing in general: F16J.
Preventing corrosion [N: or unwanted deposits] in gas-swept spaces
References relevant to classification in this group
This subclass/group does not cover:
If related to blade treatment F01D 5/286
Arrangement, mounting, or driving, of auxiliaries such as e.g. fuel or lubricant pumps, electrical generators or reduction gearboxes
Relationship between large subject matter areas
Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Controlling gas-turbine plants, controlling fuel supply in air- breathing jet-propulsion plants (controlling air intakes F02C7/057; controlling turbines F01D; controlling compressors F04D27/00 ; controlling in general G05)
Definition statement
This subclass/group covers:
Controlling gas-turbine plants, controlling fuel supply in air- breathing jet-propulsion plants
Relationship between large subject matter areas
Controlling air intakes; F02C 7/057
Controlling compressors; F04D 27/00
Informative references
Attention is drawn to the following places, which may be of interest for search:
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Last Modified: 04/16/2013 4:31:16 PM