CPC-TrainingField-specific in Gas Turbines and Propulsion

F02C, F02K (F01D)

Stefano Angelucci July 2019Examiner, European Patent Office

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Table of contents

§ Introduction

§ What and where to classify; neighbouring fields

§ Overview of the different technical aspects of F02C and F02K and examples from each main group or sub groups

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IntroductionFamily of subclasses: F02C together with F02K and F01D

F02C

F02K

F01D

§ 141 main- and subgroups in F02C,

§ 170 main- and subgroups in F02K,

§ 232 main- and subgroups in F01D.

§ 96 085 documentshave a confirmed CPC-classification in F02C

§ 42 876 documentshave a confirmed CPC-classification in F02K

§ 173 396 documentshave a confirmed CPC-classification in F01D

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IntroductionThe family shares F05D

F05D§ F05D2200-F05D2300

• 639 main- and subgroups in F05D

• 135 401 entries

• Used also in neighboring fields F04D and F23R

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IntroductionWhere to find …

§ CPC classification scheme and definitions of F02C, F02K

• www.cpcinfo.org (look at tables)

• https://www.cooperativepatentclassification.org/cpcSchemeAndDefinitions/table.html

• https://worldwide.espacenet.com/classification?locale=en_EP

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IntroductionWhere to find …

Espacenet.com

Classification Search

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IntroductionThe main kinds of search in F02K

F02K

ê

Figure-feature search

§ Figure-feature search, i.e. a search of features shown in figures

§ Text-feature search, i.e. a search for written features

When flipping through documents, in F02K, the search examiner often only looks at the figures, i.e. •classification of the figures is often more important than classification of the wording of broad and vague claims.This is similarly done in F01D.

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IntroductionThe main kinds of search in F02C

F02C

ê

Figure-feature search

and

Text-feature search

§ Figure-feature search, i.e. a search of features shown in figures

§ Text-feature search, i.e. a search for written features

• F02C is a more differentiated classification requiring looking at:

• figures of mechanical details,

• figures of systematic schemes, and

• pure text search for control methods.

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Table of contents

§ Introduction

§ What and where to classify; neighbouring fields

§ Overview of the different technical aspects of F02C and F02K and examples from each main group or sub groups

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What and where to classify …Section of a jet propulsion engine (F02K)

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What and where to classify …Rocket engine (F02K9)

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What and where to classify …The engine system (F02C)

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What and where to classify …Section of a turbine engine (F01D)

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What and where to classify …Neighbouring fields

Many neighbouring fieldsB08B Cleaning

B01D Separation of particles

C23C Coatings

F16J Seals

F16K Valves

F16C Bearings

F01M Lubrication

F01K Steam cycles and combined cycle power plants

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What and where to classify …Neighbouring fields

Many neighbouring fieldsF04D Non-positive displacement pumps

F23R Combustors

F16H Gears

G01B,P (Blade tip) measurements

H02K Dynamoelectric machines

F25B11Using Gas turbines in compressionrefrigeration plants

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What and where to classify …Neighbouring fields

Many neighbouring fields

§ Controlling aircraft attitude, flight direction or altitude by jet reaction B64C

§ Arrangement or mounting of jet-propulsion plants in aircraft B64D

B64B,C,D,F,G Aircraft in general

B60KArrangement or mounting of jet-propulsion plants in land vehicles or vehicles in general

B63HArrangement or mounting of jet-propulsion plants in waterborne vessels

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Table of contents

§ Introduction

§ What and where to classify; neighbouring fields

§ Overview of the different technical aspects of F02Cand F02K and examples from each main group orsub groups

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Overview of the different technical aspectsExamples from F02C1/00-/10

F02C

The technical field uses a set of typical blocks to identify the various parts of the system inthe schematic drawings.

Heated indirectly by sun

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Overview of the different technical aspectsExamples from F02C3/00-/365

Freeturbine

Adjustingvanes

Solidfuel

Fuel supplysystem

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Overview of the different technical aspectsExamples from F02C5/00-/12

Arrangementof combustionchamber in plant

Valve-lesspulsation

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Overview of the different technical aspectsExamples from F02C6/00-/206

CAES:

instrumental for renewable energy

Bleed system Compressed air energy storage

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Overview of the different technical aspectsExamples from F02C7/00-/36

AuxiliariesAir intakes havingvariable geometry

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Overview of the different technical aspectsExamples from F02C9/00-/58

Recycling part of fluid:F02C3/34

Control of fuel supply conjointly with control of working fluid flow by throttling the working fluid:F02C9/54

Fuel valves:F02C7/232

Restarting after flame out:F02C7/262

Emergency fuel control:F02C9/46

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Overview of the different technical aspectsExamples from F02K1/00-/827

F02K

Mixing devices in the jet pipe e.g. for mixing the primary and secondary flow: F02K1/386

Corrugated nozzle:F02K1/48

Infra red suppression:F02K1/825

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Overview of the different technical aspectsExamples from F02K3/00-/12

Part of fluid bypassing combustion chamber:F02K3/02

Burners in Bypass:F02K3/11

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Overview of the different technical aspectsExamples from F05K5/00-/026

Reciprocatingpiston

Free pistonengine

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Overview of the different technical aspectsExamples from F02K7/00-/20

Ram-Jet /Pulse-Jet

Pulse jet

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Overview of the different technical aspectsExamples from F02K9/00

Rocket engines

Solid / more portions at different burning rates

F02K9/12

Turbopumps

F02K9/48

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Thank you for your attention!