CPC Definition - Subclass F01D
This place covers:
- Non-positive-displacement engines for elastic fluids, e.g. steam turbines,
- Non-positive-displacement engines for liquids and elastic fluids,
- Non-positive-displacement machines for elastic fluids,
- Non-positive-displacement machines for Iiquids and elastic fluids.
In this subclass the indexing scheme F05D is used as follows:
F05D 2200/00: mathematical features
F05D 2210/00: working fluid
F05D 2220/00: application
F05D 2230/00: manufacture
F05D 2240/00:components
F05D 2250/00: geometry
F05D 2260/00: function
F05D 2270/00: control
F05D 2300/00: materials
This place covers:
Non-positive-displacement machines or engines, e.g. steam turbines: i.e. machine or engine that uses an impeller or propeller and through which fluid is moved
Machines or engines with working-fluid flows in opposite axial directions for balancing axial thrust F01D 3/02, with other than pure rotation F01D 23/00, turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K
This place does not cover:
Machines or engines with working-fluid flows in opposite axial directions for balancing axial thrust | |
Machines or engines with other than pure rotation | |
Turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor |
This place does not cover:
Machines or engines without stationary working-fluid guiding means |
F01D 1/24 takes precedence
This place covers:
Aspects of working fluid being guided through a rotor construction such that the action of the expelled working fluid jet creates a reaction on the rotor, i.e. a turning motion is induced upon the rotor
This place does not cover:
The working fluid being a combustion product | |
Jet propulsion plants per se |
This place covers:
Aspects of extracting power from working fluid by making use of the viscous forces within the fluid, usually by the provision of a stack of closely arranged plates through which the working fluid is forced, such as e.g. a Tesla turbine
Attention is drawn to the following places, which may be of interest for search:
Nozzle boxes | |
Special arrangements in rotors dealing with breaking off of part thereof |
Attention is drawn to the following places, which may be of interest for search:
Restoring or reconditioning fractured or cracked metal turbine components, e.g. blades or rotors | |
Maintenance management and planing of maintenance routines |
Attention is drawn to the following places, which may be of interest for search:
For more than one stage |
Attention is drawn to the following places, which may be of interest for search:
For non-positive displacement pumps | |
Attachment of a member on a shaft in general |
This place covers:
Rotor discs which are made by stacking several sheets of metallic or composite plate like elements together and attaching them to each other, e.g. by gluing or clamping in order to form a single rotor disk or a stacked rotor assembly.
Attention is drawn to the following places, which may be of interest for search:
Rotor blade aggregates of unitary construction such as bladed disks (BLISKS) or other integrally manufactured rotor and disc arrangements, e.g. machined from a billet, manufactured by composite materials or manufactured individually and finally joined to a non separable unit, e.g. by friction welding |
This place covers:
Ljungström type machines in which the working fluid usually flows radially outwardly between two counter rotating bladed plates or more generally speaking turbines in which the fluid is expanded in a radial direction passing through consecutive turbine stages, wherein the turbine blades are mounted in circular alternating rows on plate like structures
This place covers:
All aspects of blade vibration and countermeasures thereof if related to the blade itself and its construction
Attention is drawn to the following places, which may be of interest for search:
Measuring mechanical vibrations |
This place covers:
All aspects of film cooled blades, arrangement and shape of film cooling holes
In this place, the following terms or expressions are used with the meaning indicated:
Shower head (cooling) | ditto |
Film cooling | expression used in order to describe the cooling technology used in order to cool a blade with an external layer of coolant |
Attention is drawn to the following places, which may be of interest for search:
In combination with seals | F01D 11/005 and lower subclasses |
Illustrative example of subject matter classified in F01D 5/22
taken from US6402474
allocate this Indexing Code if document is addressing vibrations and damping thereof
Attention is drawn to the following places, which may be of interest for search:
Measuring mechanical vibrations |
Shaping/repair of composites |
Indexing Code-codes for fibers, materials, resin etc. in F05D 2300/00
Attention is drawn to the following places, which may be of interest for search:
Coatings in general |
Composition of the coating(s) is covered by C23C 28/00
This place covers:
Rotors with blades adjustable in operation, e.g. unshrouded fans with a single rotor or two counter-rotating rotors
taken from US2006188375
This place does not cover:
Rotors for reversing |
This place covers:
Stators, i.e. stationary fluid guiding arrangements such as nozzles etc
Attention is drawn to the following places, which may be of interest for search:
Safety | |
Casings | F01D 25/24 and F01D 25/26 |
Regulation or control |
This place covers:
Nozzle boxes, i.e. usually a bladed section of a guiding apparatus with inner and outer shrouds segments that when assembled with several other nozzle boxes results in a stator structure. Two or four nozzle boxes form a complete circular fluid supply assembly
This place covers:
Nozzles or nozzles boxes forming a ring or a sector and in which working fluid is supplied radially onto a turbine stage or a turbine wheel
This place covers:
The fluid conduits themselves, i.e. anything that supplies fluid into the casing of the turbine or ducts fluid around the casing, e.g. from a bleed valve to the user or a hot section of the turbine
Attention is drawn to the following places, which may be of interest for search:
Bearings | |
Casings | |
Double casings |
This place does not cover:
Attention is drawn to the following places, which may be of interest for search:
Sealing arrangements for transition ducts of combustor cans |
Attention is drawn to the following places, which may be of interest for search:
Blade tip magnetic field sensors |
This place does not cover:
Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby |
This place covers:
Machines or engines containing a separate turbine for reverse operation
taken from US4245467
This place covers:
Adaptation off machines or engines for special use, combinations of engines with devices driven thereby: gas turbines in combination with pumps, electrical generators, turbines specifically adapted for driving vehicles, air turbines used in compressed air driven power tools or dentistry applications
Attention is drawn to the following places, which may be of interest for search:
Dental machines | |
Portable grinding machines |
Attention is drawn to the following places, which may be of interest for search:
Features relating to the electrical generator |
Attention is drawn to the following places, which may be of interest for search:
Regulating or controlling by varying flow for reversing | |
Specially for starting | |
Shutting-down | |
Regulating or controlling in general |
Attention is drawn to the following places, which may be of interest for search:
Measurement of rotational speed |
Attention is drawn to the following places, which may be of interest for search:
Pressure sensors |
This place covers:
Vanes assemblies usually activated by a unison ring or the like in which the vanes are turning uniformly around an axis that is parallel to the rotor main axis, e.g. like in a conventional automotive turbocharger assembly
If specific for turbochargers classify also in F05D 2220/40 as additional information or F02C 6/12 as invention information
Illustrative example of subject matter classified in F01D 17/165
taken from US2003014972
If specific for turbochargers classify also in F05D 2220/40 as additional information or F02C 6/12 as invention information
Attention is drawn to the following places, which may be of interest for search:
Warming-up before starting | |
Turning or inching gear | |
Control of a generator (circuit) during starting/stopping of driving means |
This place covers:
Shutting-down of machines or engines, e.g. in emergency; regulating, controlling, or safety means not otherwise provided for, e.g. shutting down operations or methods should be classified in here if none of the sub groups apply
This place covers:
Trip mechanisms for trip valves
taken from US4379544
This place covers:
Illustrative example of subject matter classified in this group:
taken from DE3139802
Attention is drawn to the following places, which may be of interest for search:
Cleaning in general | |
Administration of workflow |
Attention is drawn to the following places, which may be of interest for search:
Bearings in general |
Illustrative example of subject matter classified in F01D 25/16
representative image taken from EP1013896
This subgroup also contains features relating to turbochargers.
If information is presented about the overall bearing configuration see also F02C 7/06.
If specific for turbochargers classify also in F05D 2220/40
Attention is drawn to the following places, which may be of interest for search:
Gas bearings in turbomachines |
Illustrative example of subject matter classified in F01D 25/168
taken from US2005047690 and US2005147335
This place covers:
Aspects related to lubrication of the engine such as lubrication circuits, lubricant supply, scavenging and the like, covers also features relating to turbochargers and lubrication thereof
Attention is drawn to the following places, which may be of interest for search:
Lubricating arrangements of machines or engines in general |
If specific for turbochargers classify also in F05D 2220/40
This place covers:
Casings for turbomachinery and also features relating to turbocharger casings.
Attention is drawn to the following places, which may be of interest for search:
Special arrangements in stators dealing with breaking-off of part of rotor | |
Casings modified for heating or cooling | |
Casings for rotary machines or engines in general |
If specific for turbochargers classify also in F05D 2220/40
Attention is drawn to the following places, which may be of interest for search:
Attention is drawn to the following places, which may be of interest for search:
Silencing or noise abatement in jet pipes or walls | |
Noise attenuators in general |
Illustrative example of subject matter classified in F01D 25/30
taken from EP1262666 and US3945760
- Classify in F05D 2260/96 in case of noise suppression.
This place covers:
Exhaust heads or chambers or diffusers comprising an additional injection of fluid such as air or liquids for any desired purpose such as cooling, cleaning of exhaust, deswirling etc.
This place covers:
Auxiliary equipment for rotating the rotor of a gas or steam turbine at low rpm, e.g. for inspection purposes or prevention of sagging and the like
taken from US4430575