CPC Definition - Subclass B64D

Last Updated Version: 2025.08
EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
Definition statement

This place covers:

  • Dropping, ejecting, releasing or receiving articles in flight;
  • Arrangements of military equipment;
  • Equipment for handling freight;
  • Flight suits;
  • Passenger or crew accommodation; arrangements of seats:
  • Air-treatment:
  • De-icing;
  • Parachutes;
  • Emergency apparatus;
  • Mounting power plant in aircraft, nacelles fairings, arrangement of power plants;
  • Power plant control
  • Transmitting power from power plants to propellers or rotors;
  • Fuel supply;
  • Fuel tanks;
  • Refuelling during flight;
  • Arrangements of instruments;
  • Indicators.
References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Equipment for UAVs

B64U

Glossary of terms

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

hybrid

power plants or aircraft having two or more different sources of motive power which may be used together or alternately

hybrid electric

power plants or aircraft having electric motors and combustion engines driving the ultimate propulsive elements, e.g. propellers. Three types of hybrid electric aircraft or propulsion plants are identified according to the arrangement of the prime movers: series, parallel and series-parallel.

hybrid electric; series type

comprises a combustion engine driving an electric generator which powers electric propulsion motors

hybrid electric; parallel type

comprises a combustion engine and an electric motor for mutual or common propulsion of the ultimate propulsive elements

hybrid electric; series-parallel type

comprises power-split devices allowing the power path from the combustion engine to the ultimate propulsive element to be either fully mechanical, fully electric as in a series type or a combination of the two

Dropping, ejecting, releasing or receiving articles, liquids, or the like, in flight (refuelling during flight B64D 39/00; launching apparatus for projecting projectiles or missiles F41F 1/00, F41F 7/00; rocket or torpedo launchers F41F 3/00; weapon sights or aiming F41G)
Relationships with other classification places

Ejector seats or ejectable capsules for ejecting or releasing humans in case of emergency are covered by groups B64D 25/10 and B64D 25/12.

References
Limiting references

This place does not cover:

Refuelling during flight

B64D 39/00

Apparatus for launching projectiles or missiles from barrels, e.g. cannons

F41F 1/00

Rocket or torpedo launchers

F41F 3/00

Launching apparatus for projecting projectiles or missiles otherwise than from barrels

F41F 7/00

Weapon sights; Aiming

F41G

Informative references

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

Parachutes

B64D 17/00

the articles being explosive, e.g. bombs
Definition statement

This place covers:

  • Ejector systems for missiles;
  • Devices for separating bombs from fuselage.
References
Informative references

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

Rocket launchers

B64D 7/08

Bombs; Missiles

F42B

Ammunition fuzes; Arming or safety means therefor

F42C

Bomb releasing; Bomb doors
Definition statement

This place covers:

Bomb bays in fuselages

Bomb doors of bomb bays.

References
Informative references

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

Bombs

F42B

Stowage arrangements for the devices in aircraft
Definition statement

This place covers:

Arrangements for holding the load in the aircraft fuselage or means adapted to release the load.

References
Informative references

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

Retaining devices for pallets or freight containers

B64D 9/003

Releasing
Definition statement

This place covers:

Extractor parachutes

Ejector devices.

Absorbing landing shocks
Definition statement

This place covers:

Rockets used as braking devices.

Cushioning devices; shock absorbers, springs, etc. for absorbing landing chocks on load-carrying articles dropped/ejected/released from an aircraft.

Illustrative example of subject matter classified in this group:

One or more rocket could be positioned on the load and ignited just prior to touch-down, such that the rocket thrust brakes/cushions the arrival on the ground, as shown in this example (ignited rockets (22) circled in red):

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Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting (jettisoning fuel B64D 37/26)
Definition statement

This place covers:

Fire fighting aircraft

Water baskets hanging below helicopters.

References
Limiting references

This place does not cover:

Jettisoning fuel

B64D 37/26

Informative references

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

Fire prevention, containment or extinguishing specially adapted for particular objects or places

A62C 3/00

by spraying, e.g. insecticides
References
Informative references

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

Spraying or atomising apparatus in general

B05B

Taking-up articles from earth's surface
Definition statement

This place covers:

Devices adapted on aircraft for hanging loads

Helicopter devices for transporting hanging loads

References
Informative references

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

Repair of electric lines

H02G 1/02

Aircraft adaptations to facilitate towing or being towed
References
Informative references

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

Refuelling during flight

B64D 39/00

Ground or aircraft-carrier-deck installations for launching aircraft

B64F 1/04

Ground or aircraft-carrier-deck installations for towing aircraft

B64F 1/223

Towing ropes per se

D07B

for towing targets
Definition statement

This place covers:

Devices mounted on aircraft for towing targets.

References
Informative references

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

Towed airborne targets

F41J 9/10

Aircraft transported by aircraft, e.g. for release or reberthing during flight
References
Informative references

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

Flying units formed by separate aircraft

B64C 37/02

Space shuttles

B64G 1/14

Arrangement of military equipment, e.g. armaments, armament accessories or military shielding, in aircraft; Adaptations of armament mountings for aircraft (dropping bombs or the like B64D 1/00)
Definition statement

This place covers:

Stealth structures

Armoured structures.

References
Limiting references

This place does not cover:

Bomb releasing

B64D 1/00

Informative references

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

Weapons

F41

Armour in general

F41H

Camouflage in general

F41H 3/00

Arrangement of rocket launchers
Definition statement

This place covers:

Rail systems for rockets.

References
Informative references

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

Ejector systems for missiles

B64D 1/04

Aircraft rocket launchers

F41F 3/06

Equipment for handling freight; Equipment for facilitating passenger embarkation or the like
Definition statement

This place covers:

Loading systems and methods

Cargo handling.

References
Informative references

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

Parachutes

B64D 17/00

Non-canopied parachutes

B64D 19/00

Emergency apparatus or devices, not otherwise provided for

B64D 25/00

Securing freight containers or forwarding containers on vehicles

B60P 7/13

Fuselage floors specially adapted for freight

B64C 1/20

Structures integral with fuselages to facilitate loading

B64C 1/22

Steps mounted on, and retractable within, fuselages

B64C 1/24

Ground installations for embarking or disembarking passengers

B64F 1/30

Ground installations for handling freight

B64F 1/32

Large rigid containers specially adapted for air transport

B65D 88/14

Roller ways

B65G 13/00

Weighing aircraft

G01G 19/07

Determining centre of gravity in aircraft

G01M 1/125

Glossary of terms

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

power drive unit [PDU]

powered rollers and drives to move containers and pallets within aircraft fuselages or cargo bays

{Devices for retaining pallets or freight containers}
References
Informative references

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

Securing freight containers on vehicles

B60P 7/13

Flight suits
Definition statement

This place covers:

  • Garments for pilots, e.g. G-suits, trousers or bladders;
  • Helmets;
  • Oxygen supply, e.g. valves, pilots' masks or controllers.
References
Informative references

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

Helmets in general

A42B 3/00

Respiratory or breathing apparatus

A62B 7/00

Protective clothing for use at high altitudes

A62B 17/00

High-altitude pressure suits

A62B 17/008

Breathing masks or helmets

A62B 18/00

Space suits

B64G 6/00

Passenger or crew accommodation; Flight-deck installations not otherwise provided for
Definition statement

This place covers:

Cabin layouts

Passengers' oxygen masks.

{Devices specially adapted for food or beverage distribution services}
Definition statement

This place covers:

Food and beverage distribution systems

Interaction between trolley and cabin.

References
Informative references

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

Trolleys adapted to be used in vehicles

A47B 31/06

{Arrangements for entertainment or communications, e.g. radio, television}
Definition statement

This place covers:

Aircraft cabin layouts characterised by arrangements of components for amusement or media, e.g. arrangements of monitors, speakers or control means therefor

Arrangements of communication means for cabin crew or passenger use

Display of navigation data on monitors for passenger information

References
Informative references

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

Accessories for chairs, adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like

A47C 7/72

Arrangements or adaptations of other passenger fittings (of radio sets, television sets, telephones, stowing or holding appliances) in land-type vehicles

B60N 3/00

Furniture for vessels

B63B 29/04

Combined measuring instruments indicating more than one navigational value, e.g. for aircraft

G01C 23/00

Special rules of classification

Documents concerning only the data transfer between components of an aircraft cabin entertainment/communication system are attributed the symbol B64D 11/0015 as additional information only.

{Movable or removable cabin dividers, e.g. for class separation}
References
Informative references

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

Aircraft bulkheads

B64C 1/10

Toilet fittings
References
Informative references

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

Sanitary equipment not otherwise provided for; Toilet accessories

A47K

{Arrangements of seats, or adaptations or details specially adapted for aircraft seats (crew seat constructions for emergency purposes B64D 25/04)}
Definition statement

This place covers:

Arrangements, configurations or modifications of seats or chairs, or particular seat or chair structures for aeronautic passengers. For passengers only, unless otherwise stated (Seats specially adapted for pilots B64D 11/0689 and Seats specially adapted for cabin crew B64D 11/0691).

References
Limiting references

This place does not cover:

Crew seat constructions for emergency purposes

B64D 25/04

Informative references

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

Chairs adapted for special (ground) purposes

A47C 1/00

Theatre, auditorium, or similar chairs

A47C 1/12

Vehicle seats

B60N 2/00

Arrangement or mounting of seats in vehicles

B60N 2/005

Vehicle seat accessories

B60N 3/00

Railway seats

B61D 33/00

Marine vessel seats

B63B 2029/043

Special rules of classification

A document will be considered as disclosing an aircraft seat if:

  • this use is explicitly mentioned,
  • it is evident from the drawings that it is such a seat, or
  • if the document originates from the aircraft industry or an airline.
{including a bed, e.g. cocoon type passenger seat modules}
Definition statement

This place covers:

  • Seat or chair units combined with a generally horizontal surface for a reclining person and can include a canopy-type structure substantially enclosing the occupant(s)
  • Additional and separate surfaces or parts to form a bed
References
Informative references

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

Crew member rest berths

B64D 2011/0076

Passenger bed units attached to the fuselage ceiling

B64D 2011/0084

Arrangements of stretchers in aircraft cabins

B64D 2011/0092

Aircraft passenger seats convertible to a bed

B64D 11/0641

{including tables or desks}
Definition statement

This place covers:

Seat or chair units combined with a generally horizontal surface above a floor and can include storage space

References
Informative references

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

Arrangements or adaptations of other passenger fittings, of table or tray

B60N 3/002

{with privacy shells, screens, separators or the like (class dividers B64D 11/0023)}
Definition statement

This place covers:

Seat or chair units combined with visual obstructions to other passengers

References
Limiting references

This place does not cover:

Class dividers

B64D 11/0023

{with devices specially adapted for exercising during travel; with devices specially adapted to prevent thrombosis}
Definition statement

This place covers:

Seats or chairs combined with appliances for a person's conditioning, muscle development, or anticlotting

References
Informative references

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

Stools or chairs having exercising means or having special therapeutic or ergonomic effects

A47C 9/002

Pneumatic or hydraulic massage

A61H 9/00

Pneumatic massage with intermittent or alternately inflated bladders or cuffs

A61H 9/0078

Physical therapy devices for anti-thrombosis or anti-clotting

A61H 2209/00

Vehicle seats with massaging systems

B60N 2/976

{with means for holding the passenger in a standing position}
Definition statement

This place covers:

Seats or chairs combined with a structure to steady an upright person

References
Informative references

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

Safety belts or body harnesses in vehicles

B60R 22/00

{specially adapted for children}
Definition statement

This place covers:

Seat or chair modifications or accessories for accommodating a pre-adult aircraft passenger

References
Informative references

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

Vehicle passenger seats for children

B60N 2/26

{with ejection means}
Definition statement

This place covers:

Seats combined with a device to propel a passenger away from the seat

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Pilot type ejection seats

B64D 25/10

Informative references

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

Ejecting or escaping means

B64D 25/08

{with energy absorbing means specially adapted for mitigating impact loads for passenger seats, e.g. at a crash}
Definition statement

This place covers:

Seats or chairs combined with a device or special design to dissipate deceleration

References
Informative references

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

Seat modifications for pilots

B64D 25/04

Seat constructed to protect the occupant from the effect of abnormal g-forces

B60N 2/42

Arrangements or fittings on vehicles for protecting or preventing injuries to occupants

B60R 21/00

{Belts or other passenger restraint means for passenger seats}
Definition statement

This place covers:

Seats or chairs combined with a torso or limb encircling device, or a device to hold an aircraft passenger in place

References
Informative references

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

Harnessing for pilots

B64D 25/06

Safety belts or body harnesses in general

A62B 35/00

Safety belts or body harnesses in vehicles

B60R 22/00

{Arrangements of airbags}
Definition statement

This place covers:

Seats or chairs combined with a device to hold a passenger in place including an inflatable confining device

References
Informative references

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

Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags

B60R 21/16

{Arrangements of electrical connectors, e.g. for earphone, internet or electric supply}
Definition statement

This place covers:

Seats or chairs combined with a configuration of mated conductors used to transmit sound, images, or current

References
Informative references

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

Arrangement of elements of electric or fluid circuits specially adapted for vehicles

B60R 16/00

{with individual temperature or ventilation control}
Definition statement

This place covers:

Seats or chairs combined with personal heating, cooling, or air circulation means

References
Informative references

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

Cabin ventilation nozzles

B64D 2013/003

Heating or ventilating devices for a vehicle

B60N 2/56

{Seats combined with storage means}
Definition statement

This place covers:

Seats or chairs combined with a cabinet or cabinet-type structure

References
Informative references

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

Stowage devices for passengers' personal luggage in aircraft

B64D 11/003

Personal storage means or waste disposal bags

B64D 11/0636

Stowing or holding appliances inside vehicle primarily intended for personal property smaller than a suitcase

B60R 7/00

{Personal storage means or waste disposal bags}
Definition statement

This place covers:

Seats or chairs with storage means for a passenger's carry-on belongings or for garbage disposal

References
Informative references

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

Stowage devices for passengers' personal luggage in aircraft

B64D 11/003

Seats combined with cabinet-type storage means

B64D 11/0627

Stowing or holding appliances inside vehicle primarily intended for personal property smaller than a suitcase

B60R 7/00

{with features for adjustment or converting of seats}
Definition statement

This place covers:

Seats or chairs having structures permitting repositioning seat or chair portions or altering the configuration

References
Informative references

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

Reclining or easy chairs

A47C 1/02

Vehicle seat or part thereof being movable, e.g. adjustable

B60N 2/02

{characterised by the arrangement of electric motors for adjustment}
Definition statement

This place covers:

Arrangement of powered devices to reposition or alter a seat portion

References
Informative references

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

Reclining or easy chairs adjustable via electric motor

A47C 1/0242

Vehicle seat or part thereof being movable or adjustable via an electric motor

B60N 2/02246

{Adjustable inclination or position of seats}
Definition statement

This place covers:

Seat or chair tilt or position configuration

References
Informative references

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

Reclining or easy chairs

A47C 1/02

Vehicle seat or part thereof being movable, e.g. adjustable

B60N 2/02

{Adjustable headrests}
Definition statement

This place covers:

Seats or chairs with a repositionable support for a passenger's portion above the torso, including the neck and/or the head

References
Informative references

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

Chairs with head rest

A47C 7/46

Vehicle seat with movable or adjustable head rest

B60N 2/806

{Adjustable foot or leg rests}
Definition statement

This place covers:

Seats or chairs with a repositionable support for a passenger's lower body, including legs and/or feet

References
Informative references

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

Chairs with leg or foot rest

A47C 1/034, A47C 7/506

Seats for vehicle with leg or foot rest

B60N 2/995, B60N 3/06

{Adjustable arm rests}
Definition statement

This place covers:

Seats or chairs with a repositionable passenger upper body extremity support, such as one or both arms

References
Informative references

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

Chairs with adjustable arm rest

A47C 1/03, A47C 7/541

Vehicle seat with adjustable arm rests

B60N 2/763

{Seats characterised by special features of stationary arms, foot or head rests}
Definition statement

This place covers:

Seats or chairs with particular characteristic of fixed supports for body parts other than the torso

References
Informative references

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

Chairs with head rest

A47C 7/36

Chairs with leg or foot rests

A47C 7/50

Chairs with stationary arm rests

A47C 7/54

Seats for vehicle with arm rests

B60N 2/75

Seats for vehicles with fixed head rest

B60N 2/803

Seats for vehicle with leg or foot rests

B60N 2/995, B60N 3/06

{Seats characterised by special upholstery or cushioning features}
Definition statement

This place covers:

Seats or chairs with particular characteristic of a soft covering or padding

References
Informative references

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

Chair of special materials

A47C 5/00

Vehicle seat with upholstery

B60N 2/70

{Lower frame constructions}
Definition statement

This place covers:

Seat or chair frames, understructure or substructure between seat pan and fastening means to a floor

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Crash frames

B64D 11/0619

Informative references

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

Vehicle seat constructed to protect the occupant from the effect of abnormal-forces, e.g. crash or safety seats

B60N 2/42

{Seats characterised by special features for reducing weight}
Definition statement

This place covers:

Seat or chair design or components therefore minimizing the weight

  • Designs without a frame, e.g. using a back plate
  • Use of materials such as plastic, aluminum, composites, etc. with the objective task to reduce weight
  • Pneumatic elements
  • One piece design, i.e. integral back and bottom
  • Hollow pieces, e.g. tubular frame members
{specially adapted for cabin crew}
Definition statement

This place covers:

Seats or chairs designed to be deployed during take-off and landing and stowed during flight, e.g. foldable seats on a wall or bulkhead specifically for a purser or flight attendant

{Width modification of seat assemblies, e.g. for class modification}
Definition statement

This place covers:

Seats or chairs with means for transverse adjustment, e.g. to accommodate an additional person

References
Informative references

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

Vehicle seats with transverse adjustment of arm rests

B60N 2/777

{Means for fastening seats to floors, e.g. to floor rails}
Definition statement

This place covers:

Seat-side structures to attach a seat or chair to receiving means of a cabin floor

References
Informative references

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

Vehicle seat positioning and locking mechanism

B60N 2/919

Floors specially adapted for fixing freight

B64C 1/20

{Seats suspended from aircraft ceiling}
Definition statement

This place covers:

Structure to attach seats or chairs to the passenger cabin overhead surface

{Seats suspended from aircraft walls}
Definition statement

This place covers:

Structure to attach seats or chairs to the passenger cabin side or generally vertical surface

  • Hammock type seats
  • Seats used in troop transport aircraft
Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space
Definition statement

This place covers:

Accessories for air-conditioning systems, e.g. valves, nozzles, air mixing chambers.

References
Informative references

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

Treatment rooms with artificial climate for medical purposes

A61G 10/02

Respiratory apparatus in general

A62B

Arrangements of heating, cooling, ventilating or other air-treating devices specially adapted for passenger or goods spaces of vehicles in general

B60H

Valves in general

F16K

{the air being used to cool structural parts of the aircraft}
Definition statement

This place covers:

Arrangements and devices to direct cooling air from air-conditioning to structural parts of the aircraft.

References
Informative references

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

Conditioning fuel

B64D 37/34

Fuselage structures adapted to reduce the effects of aerodynamic or other external heating

B64C 1/38

Aircraft heat insulation

B64C 1/40

Wing constructions adapted to reduce effects of aerodynamic or other external heating

B64C 3/36

the air being pressurised
Definition statement

This place covers:

Cabin pressurising valves

Security devices.

References
Informative references

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

Automatic control of pressure
Definition statement

This place covers:

Cabin pressurising systems.

the air being conditioned (pressurising B64D 13/02)
Definition statement

This place covers:

Air conditioning systems, e.g. air cycle machines.

References
Limiting references

This place does not cover:

Cabin pressurising systems

B64D 13/02

Informative references

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

Air cycle machines in general

F25B 9/004

Glossary of terms

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

ECS

Environmental control system

OBOGS

On-Board Oxygen Generation System

the air being heated or cooled
Definition statement

This place covers:

Systems for cooling or heating cabin air, e.g. using heat from radiator.

Heaters

Cabin ventilation systems.

References
Informative references

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

Heating, cooling or ventilating devices in vehicles

B60H 1/00

De-icing or preventing icing on exterior surfaces of aircraft
References
Informative references

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

Motor vehicles specially adapted for carrying de-icing equipment

B60P 3/00

Ground-installations for de-icing aircraft

B64F 5/20

Liquid application
References
Informative references

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

Spraying or atomising apparatus in general

B05B

by electric heating (heating arrangements specially adapted for transparent or reflecting areas H05B 3/84)
References
Limiting references

This place does not cover:

Heating arrangements specially adapted for transparent or reflecting areas

H05B 3/84

Informative references

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

Electric heating not otherwise provided for

H05B

by explosive or inflatable means
References
Informative references

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

Arrangements of valves to inflatable elastic bodies

B60C 29/00

Emergency apparatus or devices, not otherwise provided for
Definition statement

This place covers:

Fire extinguishing

Safety airbags.

References
References out of a residual place

Examples of places in relation to which this place is residual:

Parachutes

B64D 17/00

Non-canopied parachutes

B64D 19/00

Arrangement of jettisonable fuel tanks in or on aircraft

B64D 37/12

Systems for jettisoning of fuel

B64D 37/26

Informative references

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

Protection against criminal attack

B64D 45/0015

Safety belts or body harnesses in general

A62B 35/00

Fire prevention, containment or extinguishing specially adapted for aircraft

A62C 3/08

Safety belts or body harnesses for land vehicles

B60R 22/00

Severable or jettisonable parts of fuselage facilitating emergency escape

B64C 1/32

Supports or holding means for living bodies
Definition statement

This place covers:

Restraining means for pilot's legs, head or arms in ejection seats.

Seat modifications
Definition statement

This place covers:

Crashworthy seats

Adapted or integrated swimming vests.

Ejecting or escaping means
References
Informative references

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

Windows; Doors; Canopies

B64C 1/14

Inflatable escape chutes
References
Informative references

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

Arrangements of valves to inflatable elastic bodies

B60C 29/00

Flotation gear
References
Informative references

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

Aircraft alighting gear

B64C 25/00

Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
References
Informative references

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

Attitude, flight direction or altitude control of aircraft by jet reaction

B64C 15/00

Propulsion or power supply in UAVs

B64U 50/00

Aircraft characterised by the type or position of power plants
Definition statement

This place covers:

Aircraft characterised by particular disposition or arrangement of power plants.

Aircraft characterised by the type of power plants.

References
Informative references

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

Fuselages specially adapted for mounting power plants

B64C 1/16

Wings specially adapted for power plants

B64C 3/32

Helicopters with drive of rotors by means, e.g. propellers, mounted on rotor blades

B64C 27/16

of piston type
Definition statement

This place covers:

Structures for mounting piston type power plants in aircraft, independently of the position of the same.

within, or attached to, wings
Definition statement

This place covers:

Structures for mounting piston type power plant at the wing of the aircraft.

within, or attached to, fuselages
Definition statement

This place covers:

Structures for mounting piston type power plant at the fuselage of the aircraft.

of gas-turbine type  (jet aircraft B64D 27/16)
Definition statement

This place covers:

Aircraft characterised by the use of gas turbine power plants to drive the propulsive elements, such as propellers or rotors, primarily those using turboshaft or turboprop power plants.

References
Limiting references

This place does not cover:

Jet-propulsion aircraft

B64D 27/16

Informative references

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

Hybrid electric aircraft

B64D 27/33

Auxiliary power units [APUs]

B64D 41/00

Gas turbine plants per se

F02C

within, or attached to, wings
Definition statement

This place covers:

Structures for mounting turboprop type power plants at the wing of the aircraft.

within, or attached to, fuselages
Definition statement

This place covers:

Structures for mounting turboprop type power plants at the fuselage of the aircraft.

of jet type
Definition statement

This place covers:

Aircraft characterised by the use of jet-propulsion power plants, e.g. by using turbojet, turbofan, propfan or ramjet power plants.

References
Informative references

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

Jet propulsion plants per se

F02K

within, or attached to, wings
Definition statement

This place covers:

Structures for mounting turbofan type power plants at the wing of the aircraft.

within, or attached to, fuselages
Definition statement

This place covers:

Structures for mounting turbofan type power plants at the fuselage of the aircraft.

using steam or spring force (jet aircraft B64D 27/16)
References
Limiting references

This place does not cover:

Jet aircraft

B64D 27/16

Aircraft characterised by electric power plants
Definition statement

This place covers:

Aircraft characterised by the use of electric power plants for propulsion.

References
Informative references

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

Propulsion of electrically propelled vehicles

B60L

Hybrid electric aircraft
Definition statement

This place covers:

Aircraft characterised by the use of electric motors and combustion engines to drive the ultimate propulsive elements, e.g. propellers.

References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Supply of electrical power generated by combustion engines for UAVs, e.g. hybrid systems

B64U 50/33

Informative references

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

Arrangements of transmissions specially adapted for hybrid electric power plants

B64D 35/022

All-electric aircraft
Definition statement

This place covers:

Aircraft propulsion systems relying solely on electrical propulsion, i.e. without combustion engine power plants.

Arrangements for on-board electric energy production, distribution, recovery or storage
References
Informative references

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

Power plant control systems; Arrangement of power plant control systems in aircraft

B64D 31/00

Power transmission arrangements specially adapted for electric power plants

B64D 35/021

Circuit arrangements or systems for supplying or distributing electric power

H02J

Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

H02J 7/00

Systems for storing electric energy

H02J 15/00

using energy recovery
Definition statement

This place covers:

Arrangements for recovering energy from the propulsion system, e.g. power recovery turbines or propellers operating as wind motors during descent.

using solar cells
References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Supply of electrical power generated by photovoltaics for UAVs

B64U 50/31

Informative references

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

Photovoltaic [PV] power generation

H02S

Individual photovoltaic cells, e.g. solar cells

H10F 10/00

Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F 10/00, e.g. photovoltaic modules

H10F 19/00

using fuel cells
References
Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Supply of electrical power generated by fuel cells for UAVs

B64U 50/32

Informative references

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

Propulsion of electrically propelled vehicles using propulsion power supplied by batteries or fuel cells

B60L 50/50

Fuel cells per se

H01M 8/00

using batteries
References
Informative references

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

Propulsion of electrically propelled vehicles using propulsion power supplied by batteries or fuel cells

B60L 50/50

Primary cells

H01M 6/00

Secondary cells

H01M 10/00

using capacitors
References
Informative references

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

Propulsion of electrically propelled vehicles using propulsion power supplied by capacitors

B60L 50/40

Capacitors per se

H01G

Arrangements for mounting power plants in aircraft
Definition statement

This place covers:

Arrangements for mounting power plants to aircraft wings, fuselages or similar structures, such as elastomeric joints used for this purpose.

References
Informative references

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

Fuselages specially adapted for mounting power plants

B64C 1/16

Wings specially adapted for mounting power plants

B64C 3/32

Frames and supporting elements for rotary-piston engines

F01C 21/007

Supporting or mounting arrangements for non-positive-displacement engines, e.g. for turbine casings

F01D 25/28

Mounting or supporting of gas turbine plants

F02C 7/20

Power-plant nacelles, fairings or cowlings
Definition statement

This place covers:

Fairings, seals or liners.

References
Informative references

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

Aircraft nacelles not otherwise provided for

B64C 7/02

associated with wings
Definition statement

This place covers:

Aerodynamic aspects of connection elements between engine nacelle and wing.

References
Informative references

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

Wings specially adapted for mounting power plants

B64C 3/32

associated with fuselages
Definition statement

This place covers:

Aerodynamic aspects of connection elements between engine nacelle and fuselage.

References
Informative references

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

Fuselages specially adapted for mounting power plants

B64C 1/16

Attaching of nacelles, fairings or cowlings
Definition statement

This place covers:

Operating mechanisms for cowlings or panels

Latches

Supports for thrust reversers.

References
Informative references

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

Panels or cowls per se

B64D 29/08

Latches

E05B 9/00

Thrust reversers for turbine engines

F02K 1/70

Inspection panels for power plants
Definition statement

This place covers:

  • Panels;
  • Cowls.
References
Informative references

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

Operating mechanisms for cowlings or panels

B64D 29/06

Power plant control systems; Arrangement of power plant control systems in aircraft
Definition statement

This place covers:

Systems and devices for controlling the operation of aircraft power plants.

Relationships with other classification places

Group B64D 31/00 covers the arrangement or mounting of power plant control systems in aircraft, whereas group B64D 27/40 covers arrangements for mounting of power plants in aircraft.

References
Informative references

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

Aircraft propeller blade pitch-changing mechanisms

B64C 11/30

Control systems or transmitting means for actuating flying-control surfaces, lift-increasing flaps, air brakes or spoilers

B64C 13/00

Aircraft conjoint control not otherwise provided for

B64C 19/02

Rotorcraft with mechanisms for controlling blade adjustment or movement relative to rotor head

B64C 27/54

Controlling gas-turbine plants; Controlling fuel supply in air-breathing jet-propulsion plants

F02C 9/00

Controlling combustion engines

F02D

Control or regulation of electric motors

H02P

Initiating means
References
Informative references

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

Initiating means for actuating flying-control surfaces, lift-increasing flaps, air brakes or spoilers

B64C 13/02

for keeping cruising speed constant
References
Informative references

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

Propeller blade pitch-changing mechanisms characterised by being influenced by power plant control systems

B64C 11/305

Transmitting means between initiating means and power plants
References
Informative references

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

Transmitting means for actuating flying-control surfaces, lift-increasing flaps, air brakes or spoilers

B64C 13/24

for electric power plants
References
Informative references

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

Control of electric motors

H02P

Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
Definition statement

This place covers:

Power plant starting systems.

of combustion air intakes
Definition statement

This place covers:

Air intakes.

References
Informative references

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

Air intakes for gas-turbine or jet propulsion plants per se

F02C 7/04

Air intakes for internal combustion engines

F02M 35/00

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

APU

auxiliary power unit

ECS

environmental control system

of exhaust outlets or jet pipes
References
Informative references

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

Attitude, flight direction or altitude control of aircraft by jet reaction

B64C 15/00

Exhaust apparatus for internal combustion engines

F01N

Jet propulsion plants characterised by the form or arrangement of the jet pipe or nozzle

F02K 1/00

{Silencing exhaust or propulsion jets}
References
Informative references

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

Ground installations for reducing engine or jet noise

B64F 1/26

of power plant cooling systems
References
Informative references

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

Cooling of internal-combustion engines per se

F01P

Cooling of gas-turbine plants per se

F02C 7/12

Cooling of jet-propulsion plants per se

F02K

Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
References
Informative references

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

Arrangement or mounting of transmissions in vehicles

B60K 17/00

Aircraft propellers

B64C 11/00

Rotor drives for helicopters

B64C 27/12

Rotors for rotorcraft

B64C 27/32

Gearing

F16H

Lubrication

F16N

of hybrid-electric type
References
Informative references

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

Hybrid electric aircraft

B64D 27/33

of series-parallel type
Definition statement

This place covers:

Transmission arrangements comprising power-split devices, allowing the power path from the combustion engine to the ultimate propulsive element to be either fully mechanical, fully electric as in a series type, or a combination of the two.

of series type
Definition statement

This place covers:

Transmission arrangements comprising a combustion engine driving an electric generator, which powers electric propulsion motors. The combustion engine does not mechanically drive the same propulsor as the electric motor.

of parallel type
Definition statement

This place covers:

Transmission arrangements comprising a combustion engine and an electric motor for mutual or common propulsion of the ultimate propulsive elements. The combustion engine and the electric motor are generally separate systems.

the electric power plant being integral with the propeller or rotor
Definition statement

This place covers:

The propeller or rotor being an integral component of the electric motor, such as when the rotor of the electric power plant is integrated into the propeller or propulsive rotor.

References
Informative references

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

Arrangements for handling mechanical energy structurally associated with dynamo-electric machines

H02K 7/00

characterised by the transmission being driven by a plurality of power plants (for hybrid-electric power plants B64D 35/022)
References
Limiting references

This place does not cover:

Arrangement of transmissions specially adapted for hybrid-electric power plants

B64D 35/022

Arrangements in connection with fuel supply for power plant (refuelling during flight B64D 39/00)
Definition statement

This place covers:

Fuel supply systems

Gauging.

References
Limiting references

This place does not cover:

Refuelling during flight

B64D 39/00

Informative references

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

Fuel tanks for vehicles

B60K 15/00

{Accessories not provided for in the groups B64D 37/02 - B64D 37/28}
Definition statement

This place covers:

Plugs for fuel tanks

Other accessories for fuel supply.

Tanks (tanks constructed integrally with aircraft wings B64C 3/34)
References
Limiting references

This place does not cover:

Tanks constructed integrally with aircraft wings

B64C 3/34

Informative references

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

Tanks in general

B65D

Safety measures not otherwise provided for, e.g. preventing explosive conditions
Definition statement

This place covers:

  • Inerting systems;
  • Fire extinguishing;
  • Ram shock protection.
References
References out of a residual place

Examples of places in relation to which this place is residual:

Fire prevention, containment or extinguishing specially adapted for aircraft

A62C 3/08

Refuelling during flight
Definition statement

This place covers:

Controlling the position of the refuelling boom or hose.

References
Informative references

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

Filling or emptying fuel tanks

B64D 37/14

Glossary of terms

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

refuelling boom

rigid pipe for refuelling

refuelling hose

flexible hose for refuelling; normally rolled on a reel

Means for paying-in or out hose
Definition statement

This place covers:

Reels for refuelling hoses

Telescopic arrangements for refuelling booms.

Adaptations of hose construction
Definition statement

This place covers:

Constructional details or accessories for refuelling booms or hoses.

References
Informative references

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

Pipes or hoses in general

F16L

Connecting hose to aircraft; Disconnecting hose therefrom
Definition statement

This place covers:

Valves for refuelling booms or hoses

Connection devices for booms or hoses

Connection devices for the receiving aircraft.

Power installations for auxiliary purposes
Definition statement

This place covers:

Mounting Auxiliary Power Units (APU) in aircraft.

References
Informative references

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

Auxiliary Power Units (APU)

F02K

Glossary of terms

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

APU

Auxiliary Power Unit

Arrangements or adaptations of instruments
Definition statement

This place covers:

Cockpit dashboards.

References
Informative references

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

Arrangement of cameras in or to aircraft

B64D 47/08

Aeronautical measuring instruments per se

G01C

Combined instruments indicating more than one navigational value, e.g. for aircraft

G01C 23/00

Head-up displays [HUD]

G02B 27/01

Synonyms and Keywords

In patent documents, the following abbreviations are often used:

HUD

head-up display

for indicating aircraft speed or stalling conditions
Definition statement

This place covers:

Arrangement of Pitot tubes.

References
Informative references

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

Flight data probes

G01P 13/025

Aircraft indicators or protectors not otherwise provided for
Definition statement

This place covers:

  • Mounting and arrangement of crash recorders;
  • Miscellaneous indicators.
References
Informative references

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

Stealth or armoured structures

B64D 7/00

Camouflage

F41H 3/00

Crash recorders casings

H05K 5/00

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "crash recorder" and "black box"
{Devices specially adapted to indicate the position of a movable element of the aircraft, e.g. landing gear}
Definition statement

This place covers:

Asymmetric flap detection systems

Landing gear deployment detection systems.

{Devices specially adapted for the protection against criminal attack, e.g. anti-hijacking systems}
Definition statement

This place covers:

Protection systems against hijacking.

{doors or door arrangements specially adapted to restrict unauthorized access}
Relationships with other classification places

Doors or door arrangements specially adapted to restrict unauthorized access are classified in this place (B64D 45/0028) and in B64C 1/1469 (multiple classification).

References
Informative references

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

Locks

E05B

{by protecting cabin or cargo hold from bombs}
References
Informative references

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

Armour; Armour plates

F41H 5/00

Lightning protectors; Static dischargers
Definition statement

This place covers:

Conductive rivets

Making composite structures conductive.

References
Informative references

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

Conductive or anti-static coatings

C08J 7/044

Overvoltage protection resistors; Arrestors

H01C 7/12, H01C 8/04

Self-interrupters

H01G 9/18

Lightning protectors in general

H01T

Overvoltage arresters using spark gaps

H01T 4/00

Emergency protective circuit arrangements

H02H

Carrying-off electrostatic charges

H05F 3/00

Oxygen masks; Mask storages; Features related to mask deployment
References
Informative references

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

Aircraft seats combined with storage means, said storage means being specially adapted for emergency equipment

B64D 11/0629