United States Patent and Trademark Office

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

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	CPC	COOPERATIVE PATENT CLASSIFICATION

F05D

INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS

F05D 2200/00

Mathematical features

F05D 2200/10

Basic functions

F05D 2200/11

. .

Sum

F05D 2200/12

. .

Subtraction

F05D 2200/13

. .

Product

F05D 2200/14

. .

Division

F05D 2200/15

. .

Inverse

F05D 2200/20

Special functions

F05D 2200/21

. .

Root

F05D 2200/211

. . .

Square root

F05D 2200/212

. . .

Cubic root

F05D 2200/22

. .

Power

F05D 2200/221

. . .

Square power

F05D 2200/222

. . .

Cubic power

F05D 2200/23

. .

Logarithm

F05D 2200/24

. .

exponential

F05D 2200/25

. .

Hyperbolic trigonometric, e.g. sinh, cosh, tanh

F05D 2200/26

. .

trigonometric

F05D 2200/261

. . .

Sine

F05D 2200/262

. . .

Cosine

F05D 2200/263

. . .

Tangent

F05D 2200/264

. . .

Cotangent

F05D 2200/30

miscellaneous

F05D 2200/31

. .

odd

F05D 2200/32

. .

even

F05D 2200/33

. .

bigger or smaller

F05D 2200/34

. .

biggest or smallest

F05D 2200/35

. .

first

F05D 2200/36

. .

last

F05D 2210/00

Working fluids

F05D 2210/10

Kind or type

F05D 2210/11

. .

liquid, i.e. incompressible

F05D 2210/12

. .

gaseous, i.e. compressible

F05D 2210/13

. .

mixed, e.g. two-phase fluid

F05D 2210/132

. . .

Pumps with means for separating and evacuating the gaseous phase

F05D 2210/14

. .

Refrigerants with particular properties, e.g. HFC

F05D 2210/20

Properties

F05D 2210/30

Flow characteristics

F05D 2210/31

. .

with Mach-number kept constant along the flow

F05D 2210/32

. .

Pressure kept constant along the flow

F05D 2210/33

. .

Turbulent flow

F05D 2210/34

. .

Laminar flow

F05D 2210/40

Flow geometry or direction

F05D 2210/41

. .

upwards due to the buoyancy of compressed air

F05D 2210/42

. .

Axial inlet and radial outlet

F05D 2210/43

. .

Radial inlet and axial outlet

F05D 2210/44

. .

bidirectional, i.e. in opposite, alternating directions

F05D 2220/00

Application

F05D 2220/10

in ram-jet engines or ram-jet driven vehicles

F05D 2220/20

within closed fluid conduits, e.g. pipes

F05D 2220/30

in turbines

F05D 2220/31

. .

in steam turbines

F05D 2220/32

. .

in gas turbines

F05D 2220/321

. . .

for a special turbine stage

F05D 2220/3212

. . . .

the first stage of a turbine

F05D 2220/3213

. . . .

an intermediate stage of the turbine

F05D 2220/3215

. . . .

the last stage of the turbine

F05D 2220/3216

. . . .

for a special compressor stage

F05D 2220/3217

. . . . .

for the first stage of a compressor or a low pressure compressor

F05D 2220/3218

. . . . .

for an intermediate stage of a compressor

F05D 2220/3219

. . . . .

for the last stage of a compressor or a high pressure compressor

F05D 2220/323

. . .

for aircraft propulsion, e.g. jet engines

F05D 2220/324

. . .

to drive unshrouded, low solidity propeller

F05D 2220/325

. . .

to drive unshrouded, high solidity propeller

F05D 2220/326

. . .

to drive shrouded, low solidity propeller

F05D 2220/327

. . .

to drive shrouded, high solidity propeller

F05D 2220/328

. . .

providing direct vertical lift

F05D 2220/329

. . .

in helicopters

F05D 2220/34

. .

in ram-air turbines ("RATS")

F05D 2220/36

. .

specially adapted for the fan of turbofan engines

F05D 2220/40

in turbochargers

F05D 2220/50

for auxiliary power units (APU's)

F05D 2220/60

making use of surplus or waste energy

F05D 2220/62

. .

with energy recovery turbines

F05D 2220/64

. .

for domestic central heating or production of electricity

F05D 2220/70

in combination with

F05D 2220/72

. .

a steam turbine

F05D 2220/722

. . .

as part of an integrated gasification combined cycle

F05D 2220/74

. .

a gas turbine

F05D 2220/75

. .

equipment using fuel having a low calorific value, e.g. low BTU fuel, waste end, syngas, biomass fuel or flare gas

F05D 2220/76

. .

an electrical generator

F05D 2220/762

. . .

of the direct current (D.C.) type

F05D 2220/764

. . .

of the alternating current (A.C.) type

F05D 2220/7642

. . . .

of the synchronous type

F05D 2220/7644

. . . .

of the asynchronous type, i.e. induction type

F05D 2220/7646

. . . . .

Double fed induction generators (DFIGs)

F05D 2220/766

. . .

via a direct connection, i.e. a gearless transmission

F05D 2220/768

. . .

equipped with permanent magnets

F05D 2220/77

. . .

of the linear type

F05D 2220/80

in supersonic vehicles excluding hypersonic vehicles or ram, scram or rocket propulsion

F05D 2220/90

in vehicles adapted for vertical or short take off and landing (v/stol vehicles), (gas turbines providing direct vertical lift R05D220/38)

F05D 2230/00

Manufacture

F05D 2230/10

by removing material

F05D 2230/11

. .

by electrochemical methods

F05D 2230/12

. .

by spark erosion methods

F05D 2230/13

. .

using lasers

F05D 2230/14

. .

Micromachining

F05D 2230/18

. .

Manufacturing tolerances

F05D 2230/20

essentially without removing material

F05D 2230/21

. .

by casting

F05D 2230/211

. . .

by precision casting, e.g. microfusing or investment casting

F05D 2230/22

. .

by sintering

F05D 2230/23

. .

by permanently joining parts together

F05D 2230/232

. . .

by welding

F05D 2230/233

. . . .

Electron beam welding

F05D 2230/234

. . . .

Laser welding

F05D 2230/235

. . . .

TIG or MIG welding

F05D 2230/236

. . . .

Diffusion bonding

F05D 2230/237

. . . .

Brazing

F05D 2230/238

. . . .

Soldering

F05D 2230/239

. . . .

Inertia or friction welding

F05D 2230/24

. .

by extrusion

F05D 2230/25

. .

by forging

F05D 2230/26

. .

by rolling

F05D 2230/30

with deposition of material

F05D 2230/31

. .

Layer deposition

F05D 2230/311

. . .

by torch or flame spraying

F05D 2230/312

. . .

by plasma spraying

F05D 2230/313

. . .

by physical vapour deposition

F05D 2230/314

. . .

by chemical vapour deposition

F05D 2230/40

Heat treatment

F05D 2230/41

. .

Hardening; Annealing

F05D 2230/411

. . .

Precipitation hardening

F05D 2230/42

. .

by hot isostatic pressing

F05D 2230/50

Building or constructing in particular ways

F05D 2230/51

. .

in a modular way, e.g. using several identical or complementary parts or features

F05D 2230/52

. .

using existing or "off the shelf" parts, e.g. using standardized turbocharger elements

F05D 2230/53

. .

by integrally manufacturing a component, e.g. by milling from a billet or one piece construction

F05D 2230/54

. .

by sheet metal manufacturing

F05D 2230/60

Assembly methods

F05D 2230/61

. .

using limited numbers of standard modules which can be adapted by machining

F05D 2230/64

. .

using positioning or alignment devices for aligning or centring, e.g. pins

F05D 2230/642

. . .

using maintaining alignment while permitting differential dilatation

F05D 2230/644

. . .

for adjusting the position or the alignment, e.g. wedges or eccenters

F05D 2230/68

. .

using auxiliary equipment for lifting or holding

F05D 2230/70

Disassembly methods

F05D 2230/72

Maintenance

F05D 2230/80

Repairing, retrofitting or upgrading methods

F05D 2230/90

Coating; Surface treatment (manufacture with deposition of material F05D 2230/30)

F05D 2240/00

Components

NOTE

Components are the basic elements of construction

F05D 2240/10

Stators

F05D 2240/11

. .

Shroud seal segments

F05D 2240/12

. .

Fluid guiding means, e.g. vanes

F05D 2240/121

. . .

related to the leading edge of a stator vane

F05D 2240/122

. . .

related to the trailing edge of a stator vane

F05D 2240/123

. . .

related to the pressure side of a stator vane

F05D 2240/124

. . .

related to the suction side of a stator vane

F05D 2240/125

. . .

related to the tip of a stator vane

F05D 2240/126

. . .

Baffles or ribs

F05D 2240/127

. . .

Vortex generators, turbulators, or the like, for mixing (by creating turbulence F05D 2260/2212)

F05D 2240/128

. . .

Nozzles

F05D 2240/1281

. . . .

Plug nozzles

F05D 2240/129

. . .

Cascades, i.e. assemblies of similar profiles acting in parallel

F05D 2240/14

. .

Casings or housings protecting or supporting assemblies within

F05D 2240/15

. .

Heat shield

F05D 2240/20

Rotors

F05D 2240/24

. .

for turbines

F05D 2240/241

. . .

of impulse type

F05D 2240/242

. . .

of reaction type

F05D 2240/243

. . .

of the Archimedes screw type

F05D 2240/30

. .

Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor

F05D 2240/301

. . .

Cross-sectional characteristics

F05D 2240/302

. . .

characteristics related to shock waves, transonic or supersonic flow

F05D 2240/303

. . .

related to the leading edge of a rotor blade

F05D 2240/304

. . .

related to the trailing edge of a rotor blade

F05D 2240/305

. . .

related to the pressure side of a rotor blade

F05D 2240/306

. . .

related to the suction side of a rotor blade

F05D 2240/307

. . .

related to the tip of a rotor blade

F05D 2240/31

. . .

with roughened surfaces

F05D 2240/35

Combustors or associated equipment

F05D 2240/36

. .

Fuel vaporizer

F05D 2240/40

Use of a multiplicity of similar components

F05D 2240/50

Bearings

F05D 2240/51

. .

Magnetic

F05D 2240/511

. . .

with permanent magnets

F05D 2240/515

. . .

Electromagnetic

F05D 2240/52

. .

Axial thrust bearings

F05D 2240/53

. .

Hydrodynamic or hydrostatic bearings

F05D 2240/54

. .

Radial bearings

F05D 2240/55

Seals

F05D 2240/56

. .

Brush seals

F05D 2240/57

. .

Leaf seals

F05D 2240/58

. .

Piston ring seals

F05D 2240/581

. . .

Double or plural piston ring arrangements, i.e. two or more piston rings

F05D 2240/59

. .

Lamellar seals

F05D 2240/60

Shafts

F05D 2240/61

. .

Hollow

F05D 2240/62

. .

Flexible

F05D 2240/63

. .

Glands for admission or removal of fluids from shafts

F05D 2240/70

Slinger plates or washers

F05D 2240/80

Platforms for stationary or moving blades

F05D 2240/81

. .

Cooled platforms

F05D 2240/90

Mounting on supporting structures or systems

F05D 2240/91

. .

on a stationary structure

F05D 2250/00

Geometry

NOTE

Geometry indicates the shape or form of a component or the configuration or arrangement of components in a machine or in a plant

F05D 2250/10

Two-dimensional

F05D 2250/11

. .

triangular

F05D 2250/12

. .

rectangular

F05D 2250/121

. . .

square

F05D 2250/13

. .

trapezoidal

F05D 2250/131

. . .

polygonal

F05D 2250/132

. . .

hexagonal

F05D 2250/14

. .

elliptical

F05D 2250/141

. . .

circular

F05D 2250/15

. .

spiral

F05D 2250/16

. .

parabolic

F05D 2250/17

. .

hyperbolic

F05D 2250/18

. .

patterned

F05D 2250/181

. . .

ridged

F05D 2250/182

. . .

crenellated, notched

F05D 2250/183

. . .

zigzag

F05D 2250/184

. . .

sinusoidal

F05D 2250/185

. . .

serpentine-like

F05D 2250/19

. .

machined; miscellaneous

F05D 2250/191

. . .

perforated

F05D 2250/192

. . .

bevelled

F05D 2250/193

. . .

milled

F05D 2250/20

Three-dimensional

F05D 2250/21

. .

pyramidal

F05D 2250/22

. .

parallelepipedal

F05D 2250/221

. . .

cubic

F05D 2250/23

. .

prismatic

F05D 2250/231

. . .

cylindrical

F05D 2250/232

. . .

conical

F05D 2250/24

. .

ellipsoidal

F05D 2250/241

. . .

spherical

F05D 2250/25

. .

helical

F05D 2250/26

. .

paraboloid

F05D 2250/27

. .

hyperboloid

F05D 2250/28

. .

patterned

F05D 2250/281

. . .

threaded

F05D 2250/282

. . .

cubic pattern

F05D 2250/283

. . .

honeycomb

F05D 2250/29

. .

machined; miscellaneous

F05D 2250/291

. . .

hollowed

F05D 2250/292

. . .

tapered

F05D 2250/293

. . .

lathed, e.g. rotation symmetrical

F05D 2250/294

. . .

grooved

F05D 2250/30

Arrangement of components

F05D 2250/31

. .

according to the direction of their main axis or their axis of rotation

F05D 2250/311

. . .

the axes being in line

F05D 2250/312

. . .

the axes being parallel to each other

F05D 2250/313

. . .

the axes being perpendicular to each other

F05D 2250/314

. . .

the axes being inclined in relation to each other

F05D 2250/315

. . .

the main axis being substantially vertical

F05D 2250/32

. .

according to their shape

F05D 2250/321

. . .

asymptotic

F05D 2250/322

. . .

tangential

F05D 2250/323

. . .

convergent

F05D 2250/324

. . .

divergent

F05D 2250/33

. .

symmetrical

F05D 2250/34

. .

translated

F05D 2250/35

. .

rotated

F05D 2250/36

. .

in inner-outer relationship, e.g. shaft-bearing arrangements

F05D 2250/37

. .

circumferential

F05D 2250/38

. .

angled, e.g. sweep angle

F05D 2250/40

Movement of components

F05D 2250/41

. .

with one degree of freedom

F05D 2250/411

. . .

in rotation

F05D 2250/42

. .

with two degrees of freedom

F05D 2250/43

. .

with three degrees of freedom

F05D 2250/44

. .

by counter rotation

F05D 2250/50

Inlet or outlet

F05D 2250/51

. .

Inlet

F05D 2250/511

. . .

augmenting, i.e. with intercepting fluid flow cross sectional area greater than the rest of the machine behind the inlet

F05D 2250/512

. . .

concentrating only, i.e. with intercepting fluid flow cross sectional area not greater than the rest of the machine behind the inlet

F05D 2250/52

. .

Outlet

F05D 2250/53

. .

of regenerative pumps

F05D 2250/60

Structure; Surface texture

F05D 2250/61

. .

corrugated

F05D 2250/611

. . .

undulated

F05D 2250/62

. .

smooth or fine

F05D 2250/621

. . .

polished

F05D 2250/63

. .

coarse

F05D 2250/70

Shape

F05D 2250/71

. .

curved

F05D 2250/711

. . .

convex

F05D 2250/712

. . .

concave

F05D 2250/713

. . .

inflexed

F05D 2250/72

. .

symmetric

F05D 2250/73

. .

asymmetric

F05D 2250/74

. .

given by a set or table of xyz-coordinates

F05D 2250/75

. .

given by its similarity to a letter, e.g. T-shaped

F05D 2250/80

Size or power range of the machines

F05D 2250/82

. .

Micromachines

F05D 2250/84

. .

Nanomachines (Nanotechnology for interacting, sensing or actuating Y01N8/00)

F05D 2250/90

Variable geometry

F05D 2260/00

Function

F05D 2260/02

Transport and handling during maintenance and repair

F05D 2260/10

Particular cycles

F05D 2260/12

Testing on a test bench

F05D 2260/14

Preswirling

F05D 2260/15

Load balancing

F05D 2260/16

Fluid modulation at a certain frequency

F05D 2260/20

Heat transfer, e.g. cooling

F05D 2260/201

. .

by impingement of a fluid

F05D 2260/202

. .

by film cooling

F05D 2260/203

. .

by transpiration cooling

F05D 2260/204

. .

by the use of microcircuits

F05D 2260/205

. .

Cooling fluid recirculation, i.e. after cooling one or more components is the cooling fluid recovered and used elsewhere for other purposes

F05D 2260/207

. .

using a phase changing mass, e.g. heat absorbing by melting or boiling

F05D 2260/208

. .

using heat pipes

F05D 2260/209

. .

using vortex tubes

F05D 2260/211

. .

by intercooling, e.g. during a compression cycle

F05D 2260/212

. .

by water injection

F05D 2260/213

. .

by the provision of a heat exchanger within the cooling circuit

F05D 2260/221

. .

Improvement of heat transfer

F05D 2260/2212

. . .

by creating turbulence (vortex generators, turbulators or the like for mixing F05D 2240/127)

F05D 2260/2214

. . .

by increasing the heat transfer surface

F05D 2260/22141

. . . .

using fins or ribs

F05D 2260/231

. .

Preventing heat transfer

F05D 2260/232

. .

characterized by the cooling medium

F05D 2260/2322

. . .

steam

F05D 2260/234

. .

of the generator by compressor inlet air

F05D 2260/24

. .

for draft enhancement in chimneys, using solar or other heat sources

F05D 2260/30

Retaining components in desired mutual position

F05D 2260/31

Retaining bolts or nuts

F05D 2260/311

of the frangible or shear type

F05D 2260/32

. .

by means of magnetic or electromagnetic forces

F05D 2260/33

. .

with a bayonet coupling

F05D 2260/34

. .

Balancing of radial or axial forces on regenerative rotors

F05D 2260/35

. .

Reducing friction between regenerative impeller discs and casing walls

F05D 2260/36

. .

by a form fit connection, e.g. by interlocking

F05D 2260/37

. .

by a press fit connection

F05D 2260/38

. .

by a spring, i.e. spring loaded or biased towards a certain position

F05D 2260/39

. .

by a V-shaped ring to join the flanges of two cylindrical sections, e.g. casing sections of a turbocharger

F05D 2260/40

Transmission of power

F05D 2260/402

. .

through friction drives

F05D 2260/4021

. . .

through belt drives

F05D 2260/4022

. . .

through endless chains

F05D 2260/4023

. . .

through a friction clutch

F05D 2260/403

. .

through the shape of the drive components

F05D 2260/4031

. . .

as in toothed gearing

F05D 2260/40311

. . . .

of the epicyclical, planetary or differential type

F05D 2260/404

. .

through magnetic drive coupling

F05D 2260/4041

. . .

the driven magnets encircling the driver magnets

F05D 2260/406

. .

through hydraulic systems

F05D 2260/407

. .

through piezoelectric conversion

F05D 2260/408

. .

through magnetohydrodynamic conversion

F05D 2260/42

Storage of energy

F05D 2260/43

. .

in the form of rotational kinetic energy, e.g. in flywheels

F05D 2260/50

Kinematic linkage, i.e. transmission of position

F05D 2260/52

. .

involving springs

F05D 2260/53

. .

using gears

F05D 2260/532

. . .

of the bevelled or angled type

F05D 2260/54

. .

using flat or V-belts and pulleys

F05D 2260/55

. .

using chains and sprockets; using toothed belts

F05D 2260/56

. .

using cams or eccentrics

F05D 2260/57

. .

using servos, independent actuators, etc.

F05D 2260/60

Fluid transfer

F05D 2260/601

. .

using an ejector or a jet pump

F05D 2260/602

. .

Drainage

F05D 2260/6022

. . .

of leakage having past a seal (seals F05D 2240/57; glands F05D 2240/63)

F05D 2260/604

. .

Vortex non-clogging type pumps

F05D 2260/605

. .

Venting into the ambient atmosphere or the like

F05D 2260/606

. .

Bypassing the fluid

F05D 2260/607

. .

Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles

F05D 2260/608

. .

Aeration, ventilation, dehumidification or moisture removal of closed spaces

F05D 2260/609

. .

Deoiling or demisting

F05D 2260/61

. .

Removal of CO2 (removal of CO2 from waste gases B01D 53/62)

F05D 2260/611

. .

Sequestration of CO2

F05D 2260/70

Adjusting of angle of incidence or attack of rotating blades

F05D 2260/71

. .

as a function of flow velocity

F05D 2260/72

. .

by turning around an axis parallel to the rotor centre line

F05D 2260/74

. .

by turning around an axis perpendicular the rotor centre line

F05D 2260/75

. .

the adjusting mechanism not using auxiliary power sources, e.g. by "servos"

F05D 2260/76

. .

the adjusting mechanism using auxiliary power sources

F05D 2260/77

. .

the adjusting mechanism driven or triggered by centrifugal forces

F05D 2260/78

. .

the adjusting mechanism driven or triggered by aerodynamic forces

F05D 2260/79

. .

Bearing, support or actuation arrangements therefor

F05D 2260/80

Diagnostics

F05D 2260/81

Modelling or simulation

F05D 2260/82

Forecasts

F05D 2260/821

. .

Parameter estimation or prediction

F05D 2260/83

Testing, e.g. methods, components or tools therefor

F05D 2260/84

Redundancy

F05D 2260/85

Starting

F05D 2260/90

Braking

F05D 2260/901

. .

using aerodynamic forces, i.e. lift or drag

F05D 2260/902

. .

using frictional mechanical forces

F05D 2260/903

. .

using electrical or magnetic forces

F05D 2260/904

. .

using hydrodynamic forces

F05D 2260/94

Functionality given by mechanical stress related aspects such as low cycle fatigue (LCF) of high cycle fatigue (HCF)

F05D 2260/941

. .

particularly aimed at mechanical or thermal stress reduction

F05D 2260/95

Preventing corrosion (coating or surface treatment F05D 2230/90)

F05D 2260/96

Preventing, counteracting or reducing vibration or noise

F05D 2260/961

. .

by mistuning rotor blades or stator vanes with irregular interblade spacing, airfoil shape

F05D 2260/962

. .

by means of "anti-noise"

F05D 2260/963

. .

by Helmholtz resonators

F05D 2260/964

. .

counteracting thermoacoustic noise

F05D 2260/97

Reducing windage losses

F05D 2260/972

. .

in radial flow machines

F05D 2260/98

Lubrication

F05D 2260/99

Ignition, e.g. ignition by warming up of fuel or oxidizer in a resonant acoustic cavity

F05D 2270/00

Control

F05D 2270/01

Purpose of the control system

F05D 2270/02

. .

to control rotational speed (n)

F05D 2270/021

. . .

to prevent overspeed

F05D 2270/022

. . .

to prevent underspeed

F05D 2270/023

. . .

of different spools or shafts

F05D 2270/024

. . .

to keep rotational speed constant

F05D 2270/03

. .

in variable speed operation

F05D 2270/04

. .

to control acceleration (u)

F05D 2270/042

. . .

by keeping it below damagingly high values

F05D 2270/044

. . .

by making it as high as possible

F05D 2270/05

. .

to affect the output of the engine

F05D 2270/051

. . .

Thrust

F05D 2270/052

. . .

Torque

F05D 2270/053

. . .

Explicitly mentioned power

F05D 2270/06

. .

to match engine to driven device

F05D 2270/061

. . .

in particular the electrical frequency of driven generator

F05D 2270/07

. .

to improve fuel economy

F05D 2270/071

. . .

in particular at idling speed

F05D 2270/08

. .

to produce clean exhaust gases

F05D 2270/081

. . .

with as little smoke as possible

F05D 2270/082

. . .

with as little NOx as possible

F05D 2270/083

. . .

by monitoring combustion conditions

F05D 2270/0831

. . . .

indirectly, at the exhaust

F05D 2270/09

. .

to cope with emergencies

F05D 2270/091

. . .

in particular sudden load loss

F05D 2270/092

. . .

in particular blow-out and relight

F05D 2270/093

. . .

of one engine in a multi-engine system

F05D 2270/094

. . .

by using back-up controls

F05D 2270/095

. . .

by temporary overriding set control limits

F05D 2270/096

. . .

caused by water or hail ingestion

F05D 2270/10

. .

to cope with, or avoid, compressor flow instabilities

F05D 2270/101

. . .

Compressor surge or stall

F05D 2270/102

. . . .

caused by working fluid flow velocity profile distortion

F05D 2270/1022

. . . . .

due to high angle of attack of aircraft

F05D 2270/1024

. . . . .

due to compressor degradation

F05D 2270/11

. .

to prolong engine life

F05D 2270/112

. . .

by limiting temperatures

F05D 2270/114

. . .

by limiting mechanical stresses

F05D 2270/116

. . .

by preventing reverse rotation

F05D 2270/12

. .

to maintain desired vehicle trajectory parameters

F05D 2270/121

. . .

Altitude

F05D 2270/122

. . .

Speed or Mach number

F05D 2270/13

. .

to control two or more engines simultaneously

F05D 2270/14

. .

to control thermoacoustic behaviour in the combustion chambers (counteracting noise or vibration F05D260/96)

F05D 2270/16

. .

to control water or steam injection

F05D 2270/17

. .

to control boundary layer

F05D 2270/172

. . .

by a plasma generator, e.g. control of ignition

F05D 2270/173

. . .

by the Coanda effect

F05D 2270/18

. .

using fluidic amplifiers or actuators

F05D 2270/20

. .

to optimize the performance of a machine

F05D 2270/30

Control parameters, e.g. input parameters

F05D 2270/301

. .

Pressure

F05D 2270/3011

. . .

Inlet pressure

F05D 2270/3013

. . .

Outlet pressure

F05D 2270/3015

. . .

differential pressure

F05D 2270/303

. .

Temperature

F05D 2270/3032

. . .

excessive temperatures, e.g. caused by overheating

F05D 2270/304

. .

Spool rotational speed

F05D 2270/305

. .

Tolerances

F05D 2270/306

. .

Mass flow

F05D 2270/3061

. . .

of the working fluid

F05D 2270/3062

. . .

of the auxiliary fluid for heating or cooling purposes

F05D 2270/309

. .

Rate of change of parameters

F05D 2270/31

. .

Fuel schedule for stage combustors

F05D 2270/311

. .

Air humidity

F05D 2270/312

. .

Air pressure

F05D 2270/313

. .

Air temperature

F05D 2270/331

. .

Mechanical loads

F05D 2270/332

. .

Maximum loads or fatigue criteria

F05D 2270/333

. .

Noise or sound levels

F05D 2270/334

. .

Vibration measurements

F05D 2270/335

. .

Output power or torque

F05D 2270/336

. .

Blade lift measurements

F05D 2270/40

Type of control system

F05D 2270/42

. .

passive or reactive, e.g. using large wind vanes

F05D 2270/44

. .

active, predictive, or anticipative

F05D 2270/46

. .

redundant, i.e. failsafe operation

F05D 2270/50

Control logic embodiments

F05D 2270/52

. .

by electrical means, e.g. relays or switches

F05D 2270/54

. .

by electronic means, e.g. electronic tubes, transistors or IC`s within an electronic circuit

F05D 2270/56

. .

by hydraulic means, e.g. hydraulic valves within a hydraulic circuit

F05D 2270/58

. .

by mechanical means, e.g. levers, gears or cams

F05D 2270/60

Control system actuates means

F05D 2270/62

. .

Electrical actuators

F05D 2270/64

. .

Hydraulic actuators

F05D 2270/65

. .

Pneumatic actuators

F05D 2270/66

. .

Mechanical actuators (F05D 2270/62 takes precedence)

F05D 2270/70

Type of control algorithm

F05D 2270/701

. .

proportional

F05D 2270/702

. .

differential

F05D 2270/703

. .

integral

F05D 2270/704

. .

proportional-differential

F05D 2270/705

. .

proportional-integral

F05D 2270/706

. .

proportional-integral-differential

F05D 2270/707

. .

fuzzy logic

F05D 2270/708

. .

with comparison tables

F05D 2270/709

. .

with neural networks

F05D 2270/71

. .

synthesized, i.e. parameter computed by a mathematical model

F05D 2270/80

Devices generating input signals, e.g. transducers, sensors, cameras or strain gauges

F05D 2270/802

. .

Calibration thereof

F05D 2270/803

. .

Sampling thereof

F05D 2270/804

. .

Optical devices

F05D 2270/8041

. . .

Cameras

F05D 2270/805

. .

Radars

F05D 2270/806

. .

Sonars

F05D 2270/807

. .

Accelerometers

F05D 2270/808

. .

Strain gauges; Load cells

F05D 2270/809

. .

Encoders

F05D 2270/81

. .

Microphones

F05D 2270/821

. .

Displacement measuring means, e.g. inductive

F05D 2280/00

F05D 2290/00

F05D 2300/00

Materials; Properties thereof

F05D 2300/10

Metals, alloys or intermetallic compounds

F05D 2300/11

. .

Iron

F05D 2300/111

. . .

Cast iron

F05D 2300/12

. .

Light metals

F05D 2300/121

. . .

Aluminium

F05D 2300/122

. . .

Beryllium

F05D 2300/123

. . .

Boron

F05D 2300/124

. . .

Lithium

F05D 2300/125

. . .

Magnesium

F05D 2300/13

. .

Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W

F05D 2300/131

. . .

Molybdenum

F05D 2300/132

. . .

Chromium

F05D 2300/133

. . .

Titanium

F05D 2300/134

. . .

Zirconium

F05D 2300/135

. . .

Hafnium

F05D 2300/14

. .

Noble metals, i.e. Ag, Au, platinum group metals

F05D 2300/141

. . .

Silver

F05D 2300/142

. . .

Gold

F05D 2300/143

. . .

Platinum group metals, i.e. Os, Ir, Pt, Ru, Rh, Pd

F05D 2300/1431

. . . .

Palladium

F05D 2300/1432

. . . .

Ruthenium

F05D 2300/1433

. . . .

Osmium

F05D 2300/1434

. . . .

Iridium

F05D 2300/1435

. . . .

Rhodium

F05D 2300/15

. .

Rare earth metals, i.e. Sc, Y, lanthanides

F05D 2300/16

. .

Other metals not provided for in groups F05D 2300/11 to F05D 2300/15

F05D 2300/1602

. . .

Arsenic

F05D 2300/1604

. . .

Antimony

F05D 2300/1606

. . .

Bismuth

F05D 2300/1608

. . .

Barium

F05D 2300/161

. . .

Manganese

F05D 2300/1612

. . .

Lead

F05D 2300/1614

. . .

Tin

F05D 2300/1616

. . .

Zinc

F05D 2300/1618

. . .

Mercury

F05D 2300/17

. .

Alloys

F05D 2300/171

. . .

Steel alloys

F05D 2300/172

. . .

Copper alloys

F05D 2300/1721

. . . .

Bronze

F05D 2300/1722

. . . .

Phosphor-bronze alloy

F05D 2300/1723

. . . .

Nickel-Copper alloy, e.g. Monel

F05D 2300/173

. . .

Aluminium alloys, e.g. AlCuMgPb

F05D 2300/174

. . .

Titanium alloys, e.g. TiAl

F05D 2300/175

. . .

Superalloys

F05D 2300/176

. . .

Heat-stable alloys

F05D 2300/177

. . .

Ni - Si alloys

F05D 2300/18

. .

Intermetallic compounds

F05D 2300/182

. . .

Metal-aluminide intermetallic compounds

F05D 2300/20

Oxide or non-oxide ceramics

F05D 2300/21

. .

Oxide ceramics

F05D 2300/2102

. . .

Glass

F05D 2300/2104

. . .

MIBA

F05D 2300/2106

. . .

Quartz

F05D 2300/2108

. . .

Phosphor

F05D 2300/211

. . .

Silica

F05D 2300/2112

. . .

Aluminium oxides

F05D 2300/2114

. . .

Sapphire

F05D 2300/2116

. . .

Zinc oxide

F05D 2300/2118

. . .

Zirconium oxides

F05D 2300/212

. . .

Aluminium titanate

F05D 2300/22

. .

Non-oxide ceramics

F05D 2300/222

. . .

Silicon

F05D 2300/224

. . .

Carbon, e.g. graphite

F05D 2300/226

. . .

Carbides

F05D 2300/2261

. . . .

of silicon

F05D 2300/2262

. . . .

of titanium, e.g. TiC

F05D 2300/2263

. . . .

of tungsten, e.g. WC

F05D 2300/228

. . .

Nitrides

F05D 2300/2281

. . . .

of aluminium

F05D 2300/2282

. . . .

of boron

F05D 2300/2283

. . . .

of silicon

F05D 2300/2284

. . . .

of titanium

F05D 2300/2285

. . . .

of zirconium

F05D 2300/229

. . .

Sulfides

F05D 2300/2291

. . . .

of molybdenum

F05D 2300/30

Inorganic materials other than provided for in groups F05D300/10 to F05D300/2291

F05D 2300/40

Organic materials

F05D 2300/41

. .

Leather

F05D 2300/42

. .

Cellulosic materials, e.g. wood

F05D 2300/43

. .

Synthetic polymers, e.g. plastics; Rubber

F05D 2300/431

. . .

Rubber

F05D 2300/432

. . .

PTFE (PolyTetraFluorEthylene)

F05D 2300/433

. . .

Polyamides, e.g. NYLON

F05D 2300/434

. . .

Polyimides, e.g. AURUM

F05D 2300/436

. . .

Polyetherketones, e.g. PEEK

F05D 2300/437

. . .

Silicon polymers

F05D 2300/44

. .

Resins

F05D 2300/48

. .

other organic materials

F05D 2300/50

Intrinsic material properties or characteristics

F05D 2300/501

. .

Elasticity

F05D 2300/502

. .

Thermal properties

F05D 2300/5021

. . .

Expansivity

F05D 2300/50211

. . . .

similar

F05D 2300/50212

. . . .

dissimilar

F05D 2300/5023

. . .

Thermal capacity

F05D 2300/5024

. . .

Heat conductivity

F05D 2300/504

. .

Reflective properties

F05D 2300/505

. .

Shape memory behaviour

F05D 2300/506

. .

Hardness

F05D 2300/507

. .

Magnetic properties

F05D 2300/509

. .

Self lubricating materials; Solid lubricants

F05D 2300/51

. .

Hydrophilic, i.e. being or having wettable properties

F05D 2300/512

. .

Hydrophobic, i.e. being or having non-wettable properties

F05D 2300/514

. .

Porosity

F05D 2300/516

. .

Surface roughness

F05D 2300/518

. .

Ductility

F05D 2300/52

. .

Translucence

F05D 2300/522

. .

Density

F05D 2300/60

Properties or characteristics given to material by treatment or manufacturing

F05D 2300/601

. .

Fabrics

F05D 2300/6012

. . .

Woven fabrics

F05D 2300/603

. .

Composites; e.g. fibre-reinforced

F05D 2300/6031

. . .

Functionally graded composites

F05D 2300/6032

. . .

Metal matrix composites (MMC)

F05D 2300/6033

. . .

Ceramic matrix composites (CMC)

F05D 2300/6034

. . .

Orientation of fibres, weaving, ply angle

F05D 2300/604

. .

Amorphous

F05D 2300/605

. .

Crystalline

F05D 2300/606

. .

Directionally-solidified crystalline structures

F05D 2300/607

. .

Monocrystallinity

F05D 2300/608

. .

Microstructure

F05D 2300/609

. .

Grain size

F05D 2300/61

. .

Syntactic materials, i.e. hollow spheres embedded in a matrix

F05D 2300/611

. .

Coating

F05D 2300/6111

. .

functionally graded coating

F05D 2300/612

. .

Foam

F05D 2300/613

. .

Felt

F05D 2300/614

. .

Fibres or filaments

F05D 2300/615

. .

Filler

F05D 2300/70

Treatment or modification of materials

F05D 2300/701

. .

Heat treatment

F05D 2300/702

. .

Reinforcement