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CPC
COOPERATIVE PATENT CLASSIFICATION
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B64C
AEROPLANES ; HELICOPTERS ( air-cushion vehicles B60V )
NOTE
-
As far as possible, classification is made according to constructional features; classification according to particular kinds of aircraft is normally regarded as being of secondary importance, except in cases where this is considered to be the characteristic feature.

WARNING
-

The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups:
- B64C35/02 covered by B64C 35/00

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Guide Heading:
Aircraft structures or fairings ( boundary-layer controls B64C 21/00 )
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B64C 1/00
Fuselages ; Constructional features common to fuselages, wings, stabilising surfaces and the like ( aerodynamical features common to fuselages, wings, stabilising surfaces, and the like B64C 23/00 ; flight-deck installations B64D )
B64C 1/0009
.
{
Aerodynamic aspects
}
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B64C 1/06
.
Frames ; Stringers ; Longerons;
{
Fuselage sections
}
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B64C 1/061
. .
{
Frames
}
B64C 1/062
. . .
{
specially adapted to absorb crash loads
}
B64C 1/063
. . .
{
Folding or collapsing to reduce overall dimensions, e.g. foldable tail booms ( folding or collapsing wings B64C 3/56 )
}
B64C 1/064
. .
{
Stringers; Longerons
}
B64C 1/065
. .
{
Spars
}
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B64C 1/066
. .
{
Interior liners
}
B64C 1/067
. . .
{
comprising means for preventing icing or condensation conditions
}
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B64C 1/068
. .
{
Fuselage sections
}
B64C 1/069
. . .
{
Joining arrangements therefor
}
B64C 1/08
. .
Geodetic or other open-frame structures
B64C 1/10
. .
Bulkheads
B64C 1/12
. .
Construction or attachment of skin panels
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B64C 1/14
.
Windows ; Doors ; Hatch covers or access panels ; Surrounding frame structures ; Canopies ; Windscreens
{
accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
}
 ( fairings movable in conjunction with undercarriage elements B64C 25/16 ; bomb doors B64D 1/06 )
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B64C 1/1407
. .
{
Doors; surrounding frames
}
B64C 1/1415
. . .
{
Cargo doors, e.g. incorporating ramps
}
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B64C 1/1423
. . .
{
Passenger doors
}
B64C 1/143
. . . .
{
of the plug type
}
B64C 1/1438
. . . .
{
of the sliding type
}
B64C 1/1446
. . .
{
Inspection hatches ( for engine cowls B64D 29/08 )
}
B64C 1/1453
. . .
{
Drain masts
}
B64C 1/1461
. . .
{
Structures of doors or surrounding frames
}
B64C 1/1469
. . .
{
Doors between cockpit and cabin
}
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B64C 1/1476
. .
{
Canopies; Windscreens or similar transparent elements
}
B64C 1/1484
. . .
{
Windows ( B64C 1/1492 takes precedence )
}
B64C 1/1492
. . .
{
Structure and mounting of the transparent elements in the window or windscreen
}
B64C 1/16
.
specially adapted for mounting power plant
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B64C 1/18
.
Floors
B64C 1/20
. .
specially adapted for freight
B64C 1/22
.
Other structures integral with fuselages to facilitate loading
{
e.g. cargo bays, cranes ( cargo door type ramps B64C 1/1415 )
}
B64C 1/24
.
Step mounted on an retractable within fuselages ( readily removable B64D 9/00 )
B64C 1/26
.
Attaching the wing or tail units or stabilising surfaces
B64C 1/28
.
Parts of fuselage relatively movable to improve pilots view
B64C 1/30
.
Parts of fuselage relatively movable to reduce overall size for storage
B64C 1/32
.
Severable or jettisonable parts of fuselage facilitating emergency escape ( ejector seats B64D 25/10 )
B64C 1/34
.
comprising inflatable structural components ( connection of valves to inflatable elastic bodies B60C 29/00 )
B64C 1/36
.
adapted to receive aerials or radomes ( aerials or radomes per se H01Q )
B64C 1/38
.
Constructions adapted to reduce effects of aerodynamic or other external heating
{
( cooling structural parts of aircrafts with air flow B64D 13/006 )
}
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B64C 1/40
.
Sound or heat insulation,
{
e.g. using insulation blankets ( insulating elements for vehicles, in general B60R 13/08 )
}
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B64C 1/403
. .
{
Arrangement of fasteners specially adapted therefor, e.g. of clips ( in vehicles in general B60R 13/0206 )
}
B64C 1/406
. . .
{
in combination with supports for lines, e.g. for pipes or cables ( arrangement of elements of electric or fluid circuits specially adapted for vehicles, in general B60R 16/00 ; supports for pipes, cables or protective tubing F16L 3/00 ; installations of electric cables or lines in vehicles H02G 3/00 )
}
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B64C 3/00
Wings ( stabilising surfaces B64C 5/00 ; ornithopter wings B64C 33/02 )
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B64C 3/10
.
Shape of wings
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B64C 3/14
. .
Aerofoil profile
B64C 3/141
. . .
{
Circulation Control Airfoils
}
B64C 3/16
. .
Frontal aspect
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B64C 3/18
.
Spars ; Ribs ; Stringers ( attaching wing unit to fuselage B64C 1/26 )
B64C 3/182
. .
{
Stringers, longerons
}
B64C 3/185
. .
{
Spars
}
B64C 3/187
. .
{
Ribs
}
B64C 3/20
.
Integral or sandwich constructions ( layered products or sandwich constructions in general B32B )
B64C 3/22
.
Geodetic or other open-frame structures
B64C 3/24
.
Moulded or cast structures
B64C 3/26
.
Construction, shape, or attachment of separate skins, e.g. panels
B64C 3/28
.
Leading or trailing edges attached to primary structures, e.g. forming fixed slots
B64C 3/30
.
comprising inflatable structural components ( connection of valves to inflatable elastic bodies B60C 29/00 )
B64C 3/32
.
specially adapted for mounting power plant
B64C 3/34
.
Integrally-constructed tanks, e.g. for fuel ( other aircraft fuel tanks or fuel systems B64D )
B64C 3/36
.
Structures adapted to reduce effects of aerodynamic or other external heating
{
( cooling structural parts of aircrafts with air flow B64D 13/006 )
}
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B64C 3/38
.
Adjustment of complete wings or parts thereof
B64C 3/385
. .
{
Variable incidence wings
}
B64C 3/40
. .
Varying angle of sweep
B64C 3/42
. .
Adjusting about chordwise axes
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B64C 3/44
. .
Varying camber
B64C 3/46
. . .
by inflatable elements ( connection of valves to inflatable elastic bodies B60C 29/00 )
B64C 3/48
. . .
by relatively-movable parts of wing structures
B64C 3/50
. . .
by leading or trailing edge flaps ( ailerons B64C 9/00 )
B64C 3/52
. .
Warping
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B64C 3/54
. .
Varying in area ( flaps extendable to increase camber B64C 3/44 )
B64C 3/546
. . .
{
by foldable elements
}
B64C 3/56
. .
Folding or collapsing to reduce overall dimensions of aircraft
B64C 3/58
.
provided with fences or spoilers ( adjustable for control purposes B64C 9/00 )
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B64C 5/00
Stabilising surfaces ( attaching stabilising surfaces to fuselage B64C 1/26 )
B64C 5/02
.
Tailplanes ( fins B64C 5/06 )
B64C 5/04
.
Noseplanes
B64C 5/06
.
Fins ( specially for wings B64C 5/08 )
B64C 5/08
.
mounted on or supported by wings
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B64C 5/10
.
adjustable
B64C 5/12
. .
for retraction against or within fuselage or nacelle
B64C 5/14
. .
Varying angle of sweep
B64C 5/16
. .
about spanwise axes
B64C 5/18
. .
in area ( attaching stabilising surfaces to fuselage B64C 1/26 )
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B64C 7/00
Structures or fairings not otherwise provided for
B64C 7/02
.
Nacelles
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B64C 9/00
Adjustable control surfaces or members, e.g. rudders ( trimming stabilising surfaces B64C 5/10 )
B64C 9/02
.
Mounting or supporting thereof
B64C 9/04
.
with compound dependent movements
B64C 9/06
.
with two or more independent movements
B64C 9/08
.
bodily displaceable ( varying camber of wings B64C 3/44 )
B64C 9/10
.
one surface adjusted by movement of another, e.g. servo tabs ( B64C 9/04 takes precedence; adjusting surfaces of different type or function B64C 9/12 )
B64C 9/12
.
surfaces of different type or function being simultaneously adjusted
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B64C 9/14
.
forming slots ( boundary-layer control B64C 21/00 )
B64C 9/146
. .
{
at an other wing location than the rear or the front ( wings provided with fixed fences or spoilers B64C 3/58 )
}
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B64C 9/16
. .
at the rear of the wing
B64C 9/18
. . .
by single flaps
B64C 9/20
. . .
by multiple flaps
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B64C 9/22
. .
at the front of the wing
B64C 9/24
. . .
by single flap
B64C 9/26
. . .
by multiple flaps
B64C 9/28
. .
by flaps at both the front and rear of the wing operating in unison
B64C 9/30
.
Balancing hinged surfaces, e.g. dynamically
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B64C 9/32
.
Air braking surfaces ( braking by parachutes B64D 17/80 )
B64C 9/323
. .
{
associated with wings
}
B64C 9/326
. .
{
associated with fuselages
}
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B64C 9/34
.
collapsing or retracting against or within other surfaces or other members
B64C 9/36
. .
the members being fuselages or nacelles
B64C 9/38
.
Jet flaps
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B64C 11/00
Propellers, e.g. of ducted type ; Features common to propellers and rotors for rotorcraft ( rotors specially adapted for rotorcraft B64C 27/32 )
NOTE
-
Documents classified in B64C 11/001 - B64C 11/008 which also contain relevant information, covered by other subgroups of B64C 11/00 , are also classified in the appropriate subgroup of B64C 11/00

B64C 11/001
.
{
Shrouded propellers
}
B64C 11/002
.
{
Braking propellers, e.g. for measuring the power output of an engine
}
B64C 11/003
.
{
Variable-diameter propellers; Mechanisms therefor
}
B64C 11/005
.
{
Spiral-shaped propellers
}
B64C 11/006
.
{
Paddle wheels
}
B64C 11/007
.
{
Propulsive discs, i.e. discs having the surface specially adapted for propulsion purposes
}
B64C 11/008
.
{
characterised by vibration absorbing or balancing means ( for rotorcraft B64C 27/001 )
}
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B64C 11/02
.
Hub construction
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B64C 11/04
. .
Blade mountings
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B64C 11/06
. . .
for variable-pitch blades
B64C 11/065
. . . .
{
variable only when stationary
}
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B64C 11/08
. . .
for non-adjustable blades
B64C 11/10
. . . .
rigid
B64C 11/12
. . . .
flexible
B64C 11/14
. .
Spinners
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B64C 11/16
.
Blades
B64C 11/18
. .
Aerodynamic features
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B64C 11/20
. .
Constructional features
B64C 11/205
. . .
{
for protecting blades, e.g. coating
}
B64C 11/22
. . .
Solid blades
B64C 11/24
. . .
Hollow blades
B64C 11/26
. . .
Fabricated blades
B64C 11/28
. . .
Collapsible or foldable blades
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B64C 11/30
.
Blade pitch-changing mechanisms
NOTE
-
Groups B64C 11/301 , B64C 11/303 , B64C 11/305 and B64C 11/306 take precedence over B64C 11/32 , B64C 11/38 and B64C 11/44

B64C 11/301
. .
{
characterised by blade position indicating means
}
B64C 11/303
. .
{
characterised by comprising a governor
}
B64C 11/305
. .
{
characterised by being influenced by other control systems, e.g. fuel supply
}
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B64C 11/306
. .
{
specially adapted for contrarotating propellers
}
B64C 11/308
. . .
{
automatic
}
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B64C 11/32
. .
mechanical
B64C 11/325
. . .
{
comprising feathering, braking or stopping systems
}
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B64C 11/34
. . .
automatic
B64C 11/343
. . . .
{
actuated by the centrifugal force or the aerodynamic drag acting on the blades
}
B64C 11/346
. . . .
{
actuated by the centrifugal force or the aerodynamic drag acting on auxiliary masses or surfaces
}
B64C 11/36
. . .
non-automatic
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B64C 11/38
. .
fluid, e.g. hydraulic
B64C 11/385
. . .
{
comprising feathering, braking or stopping systems
}
B64C 11/40
. . .
automatic
B64C 11/42
. . .
non-automatic
B64C 11/44
. .
electric
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B64C 11/46
.
Arrangements of or constructional features peculiar to multiple propellers
{
( B64C 11/306 takes precedence )
}
B64C 11/48
. .
Units of two or more coaxial propellers
B64C 11/50
. .
Phase synchronisation between multiple propellers
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B64C 13/00
Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
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B64C 13/02
.
Initiating means
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B64C 13/04
. .
actuated personally
B64C 13/06
. . .
adjustable to suit individual persons
B64C 13/08
. . .
Trimming zero positions
B64C 13/10
. . .
comprising warning devices
B64C 13/12
. . .
Dual control apparatus
B64C 13/14
. . .
lockable ( locking in position to suit individual persons B64C 13/06 )
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B64C 13/16
. .
actuated automatically, e.g. responsive to gust detectors
B64C 13/18
. . .
using automatic pilot
B64C 13/20
. . .
using radiated signals
B64C 13/22
. . .
readily revertible to personal control
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B64C 13/24
.
Transmitting means
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B64C 13/26
. .
without power amplification or where power amplification is irrelevant
Collapse
B64C 13/28
. . .
mechanical
B64C 13/30
. . . .
using cable, chain, or rod mechanisms
B64C 13/32
. . . .
using cam mechanisms
B64C 13/34
. . . .
using toothed gearing
B64C 13/36
. . .
fluid
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B64C 13/38
. .
with power amplification
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B64C 13/40
. . .
using fluid pressure
B64C 13/42
. . . .
having duplication or stand-by provisions
B64C 13/44
. . . .
overriding of personal controls ; with automatic return to inoperative position
B64C 13/46
. . . .
with artificial feel
B64C 13/48
. . . .
characterised by the fluid being gaseous
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B64C 13/50
. . .
using electrical energy
B64C 13/503
. . . .
{
Fly-by-Wire
}
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B64C 15/00
Attitude, flight direction, or altitude control by jet reaction
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B64C 15/02
.
the jets being propulsion jets
B64C 15/12
. .
the power plant being tiltable
B64C 15/14
.
the jets being other than main propulsion jets ( jet flaps B64C 9/38 )
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B64C 17/00
Aircraft stabilisation not otherwise provided for
Collapse
B64C 17/02
.
by gravity or inertia-actuated apparatus
B64C 17/04
. .
by pendular bodies
B64C 17/06
. .
by gyroscopic apparatus ( automatic pilot control B64C 13/18 )
B64C 17/08
.
by ballast supply or discharge ( for lighter-than-air aircraft B64B )
B64C 17/10
.
Transferring fuel to adjust trim
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B64C 19/00
Aircraft control not otherwise provided for
B64C 19/02
.
Conjoint controls
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Guide Heading:
Influencing air-flow over aircraft surfaces, not otherwise provided for
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B64C 21/00
Influencing air-flow over aircraft surfaces by affecting boundary-layer flow ( boundary-layer control in general F15D )
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B64C 21/02
.
by use of slot, ducts, porous areas, or the like
B64C 21/025
. .
{
for simultaneous blowing and sucking
}
B64C 21/04
. .
for blowing ( B64C 21/08 takes precedence )
B64C 21/06
. .
for sucking ( B64C 21/08 takes precedence )
B64C 21/08
. .
adjustable
B64C 21/10
.
using other surface properties, e.g. roughness
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B64C 23/00
Influencing air-flow over aircraft surfaces, not otherwise provided for
B64C 23/005
.
{
by other means not covered by groups B64C 23/02 to B64C 23/08 , e.g. by electric charges, magnetic panels, piezoelectric elements, static charges or ultrasounds
}
B64C 23/02
.
by means of rotating members of cylindrical or similar form
B64C 23/04
.
by generating shock waves
Collapse
B64C 23/06
.
by generating vortices
B64C 23/065
. .
{
at the wing tip, e.g. winglets, splines
}
B64C 23/08
.
using Magnus effect
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B64C 25/00
Alighting gear ( air-cushion alighting gear B60V 3/08 )
B64C 25/001
.
{
Devices not provided for in the groups B64C 25/02 to B64C 25/68
}
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B64C 25/02
.
Undercarriages
B64C 25/04
. .
Arrangement or disposition on aircraft
B64C 25/06
. .
fixed
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B64C 25/08
. .
non-fixed, e.g. jettisonable
Collapse
B64C 25/10
. . .
retractable, foldable, or the like
B64C 25/12
. . . .
sideways
B64C 25/14
. . . .
fore-and-aft
B64C 25/16
. . . .
Fairings movable in conjunction with undercarriage elements
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B64C 25/18
. . . .
Operating mechanisms
B64C 25/20
. . . . .
mechanical
B64C 25/22
. . . . .
fluid
B64C 25/24
. . . . .
electric
Collapse
B64C 25/26
. . . . .
Control or locking systems therefor
B64C 25/28
. . . . . .
with indicating or warning devices
B64C 25/30
. . . . . .
emergency actuated
Collapse
B64C 25/32
.
characterised by the ground or like engaging elements ( arrester hooks B64C 25/68 )
Collapse
B64C 25/34
. .
wheeled type, e.g. multi-wheeled bogies
B64C 25/36
. . .
Arrangements or adaptations of wheels, tyres, or axles in general ( construction of wheels or axles B60B ; construction of tyres in general B60C )
B64C 25/38
. .
Endless-track type
Collapse
B64C 25/40
. .
the elements being rotated before touch-down
B64C 25/405
. . .
{
Powered wheels, e.g. for taxing
}
Collapse
B64C 25/42
. .
Arrangements or adaptations of brakes ( the ground braking force being regulated, at least in part, by a speed condition, e.g. acceleration or deceleration of the ground engaging alighting gear, B60T 8/32 )
B64C 25/423
. . .
{
Braking devices acting by reaction of gaseous medium ( B64C 25/426 takes precedence; using rockets B64D 27/023 )
}
B64C 25/426
. . .
{
Braking devices providing an automatic sequence of braking
}
Collapse
B64C 25/44
. . .
Actuating mechanisms
B64C 25/445
. . . .
{
Brake regulators for preventing somersaulting
}
B64C 25/46
. . . .
Brake regulators for preventing skidding or aircraft somersaulting
{
( anti-skidding regulators; electric or electronic controllers therefor B60T 8/1703 )
}
B64C 25/48
. . . .
differentially operated for steering purposes
Collapse
B64C 25/50
. .
Steerable undercarriages ; Shimmy damping ( steering devices applicable to land vehicles B62D )
B64C 25/505
. . .
{
Shimmy damping
}
B64C 25/52
. .
Skis or runners
Collapse
B64C 25/54
. .
Floats
B64C 25/56
. . .
inflatable ( connection of valves to inflatable elastic bodies B60C 29/00 )
Collapse
B64C 25/58
. .
Arrangements or adaptations of shock-absorbers or springs ( shimmy dampers B64C 25/50 ; vehicle suspension arrangements in general B60G ; shock absorber per se F16F )
B64C 25/60
. . .
Oleo legs
Collapse
B64C 25/62
. . .
Spring shock-absorbers ; Springs
B64C 25/64
. . . .
using rubber or like elements
B64C 25/66
. .
Convertible alighting gear ; Combinations of different kinds of ground or like engaging elements
B64C 25/68
.
Arrester hooks ( arresting gear, e.g. on aircraft carriers B64F )
Collapse
Guide Heading:
Aircraft kinds and components not otherwise provided for
Collapse
B64C 27/00
Rotorcraft ; Rotors peculiar thereto ( alighting gear B64C 25/00 )
B64C 27/001
.
{
Vibration damping devices
}
Collapse
B64C 27/006
.
{
Safety devices
}
B64C 27/007
. .
{
adapted for detection of blade cracks
}
B64C 27/008
.
{
Rotors tracking or balancing devices
}
Collapse
B64C 27/02
.
Gyroplanes
Collapse
B64C 27/021
. .
{
Rotor or rotor head construction ( for helicopters B64C 27/32 )
}
B64C 27/022
. . .
{
Devices for folding or adjusting the blades
}
B64C 27/023
. . .
{
Construction of the blades; Coating of the blades
}
B64C 27/024
. . .
{
Devices for shifting the rotor axis
}
B64C 27/025
. . .
{
Rotor drives, in particular for taking off; Combination of autorotation rotors and driven rotors
}
B64C 27/026
. . .
{
Devices for converting a fixed wing into an autorotation rotor and viceversa
}
B64C 27/027
. .
{
Control devices using other means than the rotor
}
B64C 27/028
. .
{
Other constructional elements; Rotor balancing
}
Collapse
B64C 27/04
.
Helicopters
B64C 27/06
. .
with single rotor
Collapse
B64C 27/08
. .
with two or more rotors
B64C 27/10
. . .
arranged coaxially
Collapse
B64C 27/12
. .
Rotor drives
B64C 27/14
. . .
Direct drive between power plant and rotor hub
Collapse
B64C 27/16
. . .
Drive of rotors by means, e.g. propellers, mounted on rotor blades
B64C 27/18
. . . .
the means being jet-reaction apparatus
B64C 27/20
.
Rotorcraft characterised by having shrouded rotors, e.g. flying platforms
Collapse
B64C 27/22
.
Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft
B64C 27/24
. .
with rotor blades fixed in flight to act as lifting surfaces
B64C 27/26
. .
characterised by provision of fixed wings
B64C 27/28
. .
with forward-propulsion propellers pivotable to act as lifting rotors
B64C 27/30
. .
with provision for reducing drag of inoperative rotor
Collapse
B64C 27/32
.
Rotors ( features common to rotors and propellers B64C 11/00 )
B64C 27/322
. .
{
Blade travel limiting devices, e.g. droop stops
}
B64C 27/325
. .
{
Circulation-control rotors
}
B64C 27/327
. .
{
Retention means relieving the stress from the arm, e.g. tie-bars
}
B64C 27/33
. .
having flexing arms
B64C 27/35
. .
having elastomeric joints
Collapse
B64C 27/37
. .
having articulated joints ( B64C 27/33 , B64C 27/35 take precedence )
B64C 27/39
. . .
with individually articulated blades, i.e. with flapping or drag hinges
Collapse
B64C 27/41
. . .
with flapping or universal joint, common to the blades
B64C 27/43
. . . .
see-saw type, i.e. two-bladed rotor
B64C 27/45
. . .
with a feathering hinge only
Collapse
B64C 27/46
. .
Blades
B64C 27/463
. . .
{
Blade tips
}
B64C 27/467
. . .
Aerodynamic features
{
( B64C 27/463 takes precedence )
}
Collapse
B64C 27/473
. . .
Constructional features
{
( B64C 27/463 takes precedence )
}
B64C 27/48
. . . .
Root attachment to rotor head
B64C 27/50
. . . .
Blades foldable to facilitate stowage of aircraft
B64C 27/51
.
{
Damping of blade movements
}
B64C 27/52
.
Tilting of rotor bodily relative to fuselage ( of see-saw type construction B64C 27/43 )
Collapse
B64C 27/54
.
Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
Collapse
B64C 27/56
. .
Initiating means, e.g. actuated personally
B64C 27/57
. . .
automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust
Collapse
B64C 27/58
. .
Transmitting means
Collapse
B64C 27/59
. . .
mechanical
B64C 27/605
. . . .
including swash plate, spider or cam mechanisms
B64C 27/615
. . . .
including flaps mounted on blades
B64C 27/625
. . . .
including rotating masses or servo rotors
B64C 27/635
. . . .
specially for controlling lag-lead movements of blades
B64C 27/64
. . . .
using fluid pressure
B64C 27/68
. . . .
using electrical energy
B64C 27/72
. .
Means acting on blades
B64C 27/78
. .
in association with pitch adjustment of blades of anti-torque rotor
B64C 27/80
. .
for differential adjustment of blade pitch between two or more lifting rotors
B64C 27/82
.
characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft
Collapse
B64C 29/00
Aircraft capable of landing or taking-off vertically ( attitude, flight direction, or altitude control by jet reaction B64C 15/00 ; rotorcraft B64C 27/00 ; air-cushion vehicles B60V )
Collapse
B64C 29/0008
.
{
having its flight directional axis horizontal when grounded
}
Collapse
B64C 29/0016
. .
{
the lift during taking-off being created by free or ducted propellers or by blowers
}
B64C 29/0025
. . .
{
the propellers being fixed relative to the fuselage
}
B64C 29/0033
. . .
{
the propellers being tiltable relative to the fuselage
}
Collapse
B64C 29/0041
. .
{
the lift during taking-off being created by jet motors
}
B64C 29/005
. . .
{
the motors being fixed relative to the fuselage
}
B64C 29/0058
. . .
{
with vertical jet
}
B64C 29/0066
. . .
{
with horizontal jet and jet deflector
}
B64C 29/0075
. . .
{
the motors being tiltable relative to the fuselage
}
B64C 29/0083
. .
{
the lift during taking-off being created by several motors of different type
}
B64C 29/0091
.
{
Accessories not provided for elsewhere
}
Collapse
B64C 29/02
.
having its flight directional axis vertical when grounded
B64C 29/04
. .
characterised by jet-reaction propulsion
B64C 30/00
Supersonic-type aircraft
Collapse
B64C 31/00
Aircraft intended to be sustained without power plant ; Powered hang-glider-type aircraft ; Microlight-type aircraft
Collapse
B64C 31/02
.
Gliders, e.g. sailplanes ( hang-gliders B64C 31/028 )
B64C 31/024
. .
with auxiliary power plant
Collapse
B64C 31/028
.
Hang-glider-type aircraft ; Microlight-type aircraft
B64C 31/0285
. .
{
Safety devices
}
B64C 31/032
. .
having delta shaped wing
B64C 31/036
. .
having parachute-type wing ( parachutes B64D 17/00 )
B64C 31/04
.
Man-powered aircraft ( ornithopters B64C 33/00 )
B64C 31/06
.
Kites ( hang-gliders B64C 31/028 ; toy aspects A63H 27/08 ; towed targets F41J
{
for propelling boats B63H 9/0685 ; for propelling wind driven boards, control means and harnesses therefor B63B 35/7976
}
 )
Collapse
B64C 33/00
Ornithopters
Collapse
B64C 33/02
.
Wings ; Actuating mechanisms therefor
B64C 33/025
. .
{
the entire wing moving either up or down
}
Collapse
B64C 35/00
Flying-boats ; Seaplanes ( alighting gear B64C 25/00 )
Collapse
B64C 35/001
.
{
with means for increasing stability on the water
}
B64C 35/002
. .
{
using adjustable auxiliary floats
}
B64C 35/003
. .
{
using auxiliary floats at the wing tips
}
B64C 35/005
.
{
with propellers, rudders or brakes acting in the water
}
B64C 35/006
.
{
with lift generating devices
}
B64C 35/007
.
{
Specific control surfaces therefor
}
B64C 35/008
.
{
Amphibious sea planes
}
Collapse
B64C 37/00
Convertible aircraft ( vehicles capable of travelling in or on different media B60F )
B64C 37/02
.
Flying units formed by separate aircraft ( towing, air-refuelling, or aircraft-carrying aircraft B64D )
Collapse
B64C 39/00
Aircraft not otherwise provided for
B64C 39/001
.
{
Flying saucers
}
Collapse
B64C 39/003
.
{
with wings, paddle wheels, bladed wheels, moving or rotating in relation to the fuselage ( rotorcraft B64C 27/00 , ornithopters B64C 33/00 )
}
B64C 39/005
. .
{
about a horizontal transversal axis
}
B64C 39/006
. .
{
about a vertical axis
}
B64C 39/008
. .
{
about a longitudinal axis
}
Collapse
B64C 39/02
.
characterised by special use
B64C 39/022
. .
{
Tethered aircraft
}
B64C 39/024
. .
{
of the remote controlled vehicle type, i.e. RPV
}
B64C 39/026
. .
{
for use as personal propulsion unit
}
B64C 39/028
. .
{
Micro-sized aircraft
}
B64C 39/04
.
having multiple fuselages or tail booms
Collapse
B64C 39/06
.
having disc- or ring-shaped wings
{
( B64C 39/001 takes precedence )
}
Collapse
B64C 39/062
. .
{
having annular wings
}
B64C 39/064
. . .
{
with radial airflow
}
B64C 39/066
. .
{
having channel wings
}
B64C 39/068
. .
{
having multiple wings joined at the tips
}
B64C 39/08
.
having multiple wings
{
( B64C 39/06 takes precedence )
}
B64C 39/10
.
All-wing aircraft
{
( B64C 39/001 takes precedence )
}
B64C 39/12
.
Canard-type aircraft
Collapse
B64C 2001/00
Fuselages ; Constructional features common to fuselages, wings, stabilising surfaces and the like ( aerodynamical features common to fuselages, wings, stabilising surfaces, and the like B64C 23/00 ; flight-deck installations B64D )
Collapse
B64C 2001/0018
.
comprising two decks adapted for carrying passengers only
B64C 2001/0027
. .
arranged one above the other
B64C 2001/0036
. .
arranged side by side at the same level
B64C 2001/0045
.
Fuselages characterised by special shapes
Collapse
B64C 2001/0054
.
Fuselage structures substantially made from particular materials
B64C 2001/0063
. .
from wood
B64C 2001/0072
. .
from composite materials
B64C 2001/0081
. .
from metallic materials
B64C 2001/009
.
comprising decompression panels or valves for pressure equalisation in fuselages or floors
Collapse
B64C 2003/00
Wings ( stabilising surfaces B64C 5/00 ; ornithopter wings B64C 33/02 )
Collapse
B64C 2003/10
.
Shape of wings
Collapse
B64C 2003/14
. .
Aerofoil profile
B64C 2003/142
. . .
with variable camber along the airfoil chord
B64C 2003/143
. . .
comprising interior channels
B64C 2003/144
. . .
including a flat surface on either the extrados or intrados
B64C 2003/145
. . .
comprising 'Gurney' flaps
B64C 2003/146
. . .
comprising leading edges of particular shape
B64C 2003/147
. . .
comprising trailing edges of particular shape
B64C 2003/148
. . .
comprising protuberances, e.g. for modifying boundary layer flow
B64C 2003/149
. . .
for supercritical or transonic flow
Collapse
B64C 2003/38
.
Adjustment of complete wings or parts thereof
Collapse
B64C 2003/44
. .
Varying camber
B64C 2003/445
. . .
by changing shape according to the speed, e.g. by morphing
Collapse
B64C 2003/54
. .
Varying in area ( flaps extendable to increase camber B64C 3/44 )
B64C 2003/543
. . .
by changing shape according to the speed, e.g. by morphing
Collapse
B64C 2009/00
Adjustable control surfaces or members, e.g. rudders ( trimming stabilising surfaces B64C 5/10 )
B64C 2009/005
.
Ailerons
Collapse
B64C 2009/14
.
forming slots ( boundary-layer control B64C 21/00 )
B64C 2009/143
. .
comprising independently adjustable elements for closing or opening the slot between the main wing and leading or trailing edge flaps
Collapse
B64C 2013/00
Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
Collapse
B64C 2013/24
.
Transmitting means
Collapse
B64C 2013/38
. .
with power amplification
Collapse
B64C 2013/50
. . .
using electrical energy
Collapse
B64C 2013/503
. . . .
{
Fly-by-Wire
}
B64C 2013/506
. . . . .
using electro-hydrostatic actuators (EHA's)
Collapse
B64C 2025/00
Alighting gear ( air-cushion alighting gear B60V 3/08 )
Collapse
B64C 2025/001
.
{
Devices not provided for in the groups B64C 25/02 to B64C 25/68
}
B64C 2025/003
. .
Means for reducing landing gear noise, or turbulent flow around it, e.g. landing gear doors used as deflectors
B64C 2025/005
. .
Tail skids for fuselage tail strike protection on tricycle landing gear aircraft
B64C 2025/006
. .
Landing gear legs comprising torque arms
B64C 2025/008
. .
Comprising means for modifying their length, e.g. for kneeling, for jumping, or for leveling the aircraft
Collapse
B64C 2025/02
.
Undercarriages
Collapse
B64C 2025/08
. .
non-fixed, e.g. jettisonable
Collapse
B64C 2025/10
. . .
retractable, foldable, or the like
Collapse
B64C 2025/12
. . . .
sideways
B64C 2025/125
. . . . .
into the fuselage, e.g. main landing gear pivotally retracting into or extending out of the fuselage
Collapse
B64C 2025/32
.
characterised by the ground or like engaging elements ( arrester hooks B64C 25/68 )
B64C 2025/325
. .
specially adapted for helicopters
Collapse
B64C 2025/34
. .
wheeled type, e.g. multi-wheeled bogies
B64C 2025/345
. . .
Multi-wheel bogies having one or more steering axes
Collapse
B64C 2027/00
Rotorcraft ; Rotors peculiar thereto ( alighting gear B64C 25/00 )
Collapse
B64C 2027/001
.
{
Vibration damping devices
}
B64C 2027/002
. .
mounted between the rotor drive and the fuselage
B64C 2027/003
. .
mounted on rotor hub, e.g. a rotary force generator
B64C 2027/004
. .
using actuators, e.g. active systems
B64C 2027/005
. .
using suspended masses
Collapse
B64C 2027/04
.
Helicopters
Collapse
B64C 2027/12
. .
Rotor drives
B64C 2027/125
. . .
including toroidal transmissions, e.g. of the CVT type
Collapse
B64C 2027/32
.
Rotors ( features common to rotors and propellers B64C 11/00 )
Collapse
B64C 2027/46
. .
Blades
Collapse
B64C 2027/473
. . .
Constructional features
{
( B64C 27/463 takes precedence )
}
Collapse
B64C 2027/4733
. . . .
Rotor blades substantially made from particular materials
B64C 2027/4736
. . . . .
from composite materials
Collapse
B64C 2027/54
.
Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
Collapse
B64C 2027/72
. .
Means acting on blades
Collapse
B64C 2027/7205
. . .
on each blade individually, e.g. individual blade control (IBC)
Collapse
B64C 2027/7211
. . . .
without flaps
B64C 2027/7216
. . . . .
using one actuator per blade
B64C 2027/7222
. . . . .
using airfoil deformation
B64C 2027/7227
. . . . .
using blowing slots actuated by piezoelectric actuators
Collapse
B64C 2027/7233
. . . . .
using higher-harmonic control (HHC)
B64C 2027/7238
. . . . . .
by controlling existing swash plate actuators
B64C 2027/7244
. . . . . .
by using dedicated actuators
B64C 2027/725
. . . . .
using jets controlled by piezoelectric actuators
B64C 2027/7255
. . . . .
using one or more swash plates
Collapse
B64C 2027/7261
. . . .
with flaps
Collapse
B64C 2027/7266
. . . . .
actuated by actuators
B64C 2027/7272
. . . . . .
of the electro-hydraulic type
B64C 2027/7277
. . . . . .
of the magnetostrictive type
B64C 2027/7283
. . . . . .
of the piezoelectric type
B64C 2027/7288
. . . . . .
of the memory shape type
B64C 2027/7294
. . . . .
actuated mechanically, e.g. by means of linkages
Collapse
B64C 2027/82
.
characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft
B64C 2027/8209
. .
Electrically driven tail rotors
B64C 2027/8218
. .
wherein the rotor or the jet axis is inclined with respect to the longitudinal horizontal or vertical plane of the helicopter
B64C 2027/8227
. .
comprising more than one rotor
B64C 2027/8236
. .
including pusher propellers
B64C 2027/8245
. .
using air jets
B64C 2027/8254
. .
Shrouded tail rotors, e.g. "Fenestron" fans
Collapse
B64C 2027/8263
. .
comprising in addition rudders, tails, fins, or the like
B64C 2027/8272
. . .
comprising fins, or movable rudders
B64C 2027/8281
. . .
comprising horizontal tail planes
B64C 2027/829
. . .
comprising a V-tail units
Collapse
B64C 2031/00
Aircraft intended to be sustained without power plant ; Powered hang-glider-type aircraft ; Microlight-type aircraft
Collapse
B64C 2031/06
.
Kites ( hang-gliders B64C 31/028 ; toy aspects A63H 27/08 ; towed targets F41J
{
for propelling boats B63H 9/0685 ; for propelling wind driven boards, control means and harnesses therefor B63B 35/7976
}
 )
B64C 2031/065
. .
of inflatable wing type
Collapse
B64C 2039/00
Aircraft not otherwise provided for
B64C 2039/105
.
of blended wing body type
Collapse
B64C 2201/00
Unmanned aerial vehicles ; Equipment therefor
Collapse
B64C 2201/02
.
characterized by type of aircraft
B64C 2201/021
. .
Airplanes, i.e. having wings and tail planes
B64C 2201/022
. .
Balloons, blimps or airships
B64C 2201/024
. .
Helicopters, or autogiros
B64C 2201/025
. .
Ornithopters, i.e. generating lift and propulsion by flapping wings or insect like means
B64C 2201/027
. .
Flying platforms
B64C 2201/028
. .
of all-wing types
Collapse
B64C 2201/04
.
characterised by type of power plant
B64C 2201/042
. .
by electric motors ; Electric power sources therefor, e.g. fuel cells, solar panels or batteries
B64C 2201/044
. .
by internal combustion engines, e.g. oscillating piston or rotary piston engines
B64C 2201/046
. .
by rocket engines, ramjets, or pulse-reactors
B64C 2201/048
. .
by jet turbines, or turbofans
Collapse
B64C 2201/06
.
characterised by in-flight supply of energy
B64C 2201/063
. .
by refueling
B64C 2201/066
. .
by recharging of batteries, e.g. by induction
Collapse
B64C 2201/08
.
characterised by the launching method
B64C 2201/082
. .
Released from other aircraft
B64C 2201/084
. .
using catapults
B64C 2201/086
. .
by taking-off horizontally by own power, e.g. from a runway
B64C 2201/088
. .
Vertical take-off using special means ( for helicopters B64C 2201/024 ; for balloons B64C 2201/022 )
Collapse
B64C 2201/10
.
characterised by the lift producing means
B64C 2201/101
. .
Lifting aerostatically, e.g. using lighter-than-air gases in chambers
B64C 2201/102
. .
Deployable wings, e.g. foldable or morphing wings
B64C 2201/104
. .
Fixed wings
B64C 2201/105
. .
Inflatable wings
B64C 2201/107
. .
Parachutes ; Parasails ; Kites ; Membranes
B64C 2201/108
. .
using rotors, or propellers
Collapse
B64C 2201/12
.
adapted for particular use
B64C 2201/121
. .
for dropping bombs ; for electronic warfare ; Flying bombs
B64C 2201/122
. .
as communication relays, e.g. high altitude platforms
B64C 2201/123
. .
for imaging, or topography
B64C 2201/125
. .
for meteorology
B64C 2201/126
. .
adapted for performing different kinds of missions, e.g. multipurpose use
B64C 2201/127
. .
for photography, or video recording, e.g. by using cameras
B64C 2201/128
. .
for transporting goods other than bombs
Collapse
B64C 2201/14
.
characterised by flight control
Collapse
B64C 2201/141
. .
autonomous, i.e. by navigating independently from ground or air stations, e.g. by using inertial navigation systems (INS)
B64C 2201/143
. . .
adapted for flying in formations
B64C 2201/145
. . .
using satellite radio beacon positioning systems, e.g. GPS
Collapse
B64C 2201/146
. .
Remote controls
B64C 2201/148
. . .
using tethers for connecting to ground station
Collapse
B64C 2201/16
.
characterised by type of propulsion unit
B64C 2201/162
. .
using ducted fans or propellers
B64C 2201/165
. .
using unducted propellers
B64C 2201/167
. .
using rockets, ramjets, pulse jets, plasma, or the like
Collapse
B64C 2201/18
.
characterised by landing method
B64C 2201/182
. .
by being caught in mid-air, or next to the ground, e.g. using a net
B64C 2201/185
. .
by deploying parachutes, or the like
B64C 2201/187
. .
by landing horizontally, e.g. on a runway
Collapse
B64C 2201/20
.
Methods for transport, or storage of unmanned aerial vehicles
B64C 2201/201
. .
in containers
B64C 2201/203
. .
in rucksacks, or bags to be carried by persons
B64C 2201/205
. .
by waterborne vehicles, e.g. ships or submarines or by hovercraft
B64C 2201/206
. .
by airborne vehicles, e.g. airplanes or helicopters
B64C 2201/208
. .
by landborne vehicles, e.g. trucks, lorries, tanks or cars
B64C 2201/22
.
having stealth characteristics
B64C 2203/00
Flying model aircraft, flying toy aircraft
B64C 2211/00
Modular constructions of airplanes or helicopters
B64C 2220/00
Active noise reduction systems
Collapse
B64C 2230/00
Boundary layer controls
B64C 2230/02
.
by using acoustic waves generated by transducers
B64C 2230/04
.
by actively generating fluid flow
B64C 2230/06
.
by explicitly adjusting fluid flow, e.g. by using valves, variable aperture or slot areas, variable pump action or variable fluid pressure
B64C 2230/08
.
by influencing fluid flow by means of surface cavities, i.e. net fluid flow is null
B64C 2230/10
.
by influencing fluid flow by heating using other means than combustion
B64C 2230/12
.
by using electromagnetic tiles, fluid ionizers, static charges or plasma
B64C 2230/14
.
achieving noise reductions
B64C 2230/16
.
by blowing other fluids over the surface than air, e.g. He, H, O2 or exhaust gases
B64C 2230/18
.
by using small jets that make the fluid flow oscillate
B64C 2230/20
.
by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct
B64C 2230/22
.
by using a surface having multiple apertures of relatively small openings other than slots
B64C 2230/24
.
by using passive resonance cavities, e.g. without transducers
B64C 2230/26
.
by using rib lets or hydrophobic surfaces
B64C 2230/28
.
at propeller or rotor blades
Collapse
B64C 2700/00
Codes corresponding to the former IdT classification
Collapse
B64C 2700/62
.
Codes corresponding to the former IdT classification of class 62
Collapse
B64C 2700/6201
. .
Airplanes, helicopters, autogyros
Collapse
B64C 2700/6202
. . .
Characteristics not limited to an aircraft type
B64C 2700/6204
. . . .
Materials
B64C 2700/6205
. . . .
Protection means, e.g. against rust, water, fire
Collapse
B64C 2700/6207
. . . .
Stabilisation
Collapse
B64C 2700/6208
. . . . .
Longitudinal and transversal stability
Collapse
B64C 2700/6209
. . . . . .
automatically controlled
B64C 2700/6211
. . . . . . .
with movable weight not acting as pendulum
Collapse
B64C 2700/6212
. . . . . . .
with weight acting as pendulum
B64C 2700/6214
. . . . . . . .
with parts of the aircraft acting as pendulum
B64C 2700/6215
. . . . . . . .
with fluid acting as pendulum
B64C 2700/6216
. . . . . . .
by gyroscopical effect ( also in combination with pendulum )
Collapse
B64C 2700/6218
. . . . . . .
by other pulse power source, e.g. aerodynamical effect, propellers
B64C 2700/6219
. . . . . . . .
by auxiliary fixed or movable surfaces or other special devices, or surfaces acting as parachutes
Collapse
B64C 2700/6221
. . . . . .
manually controlled
B64C 2700/6222
. . . . . . .
with movable weight not acting as pendulum
B64C 2700/6223
. . . . . . .
with weight acting as pendulum
B64C 2700/6225
. . . . . . .
by gyroscopical effet ( also in combination with pendulum )
Collapse
B64C 2700/6226
. . . . . . .
by other pulse power source ; e.g. aerodymamical effet, popeller
B64C 2700/6228
. . . . . . . .
by auxiliary planes or parachutes
B64C 2700/6229
. . . . . .
Special devices to stabilise or to compensate a helicoper rotor by other means than counter rotating rotor
B64C 2700/623
. . . . . .
Special devices to stabilise or to compensate a gyroplane pivoting torque
Collapse
B64C 2700/6232
. . .
Airplanes with fixed or movable wings
Collapse
B64C 2700/6233
. . . .
Design, structure or mounting of wings
B64C 2700/6235
. . . . .
Guy-wires assemblies ; Connections between wings and fuselage
B64C 2700/6236
. . . . .
Honeycomb stiffeners
B64C 2700/6238
. . . . .
Pressure equalising devices between the inside of the wing and the atmosphere
B64C 2700/6239
. . . . .
Ful wing structures
Collapse
B64C 2700/624
. . . . .
Wings or parts thereof movable during flight
B64C 2700/6242
. . . . . .
adjustable about several axes
Collapse
B64C 2700/6243
. . . .
Control systems
B64C 2700/6245
. . . . .
by warping of wings tips
B64C 2700/6246
. . . . .
by auxiliary surfaces at the wings tips
B64C 2700/6247
. . . . .
by auxiliary surfaces outside the wings tips
B64C 2700/6249
. . . . .
by propellers
B64C 2700/625
. . . . .
by jet flaps
Collapse
B64C 2700/6252
. . . . .
Control systems assemblies
B64C 2700/6253
. . . . . .
Feedback compensation devices
Collapse
B64C 2700/6254
. . . . .
Control systems or transmitting systems for actuating control surfaces
Collapse
B64C 2700/6256
. . . . . .
Control devices for fins or rudders
B64C 2700/6257
. . . . . . .
by hydraulical, pneumatical or electrical means
Collapse
B64C 2700/6259
. . . . . .
Control devices for feed-back compensating and guiding surfaces
B64C 2700/626
. . . . . . .
by hydraulical, pneumatical or electrical means
Collapse
B64C 2700/6261
. . . . . .
Transmission systems
B64C 2700/6263
. . . . . . .
Servo actuators ; Auxiliary motors
B64C 2700/6264
. . . . . .
Vibrations suppressing devices
B64C 2700/6266
. . . . . .
Safety devices
B64C 2700/6267
. . . . .
Control devices for a special position of the flying aircraft or a special position of the pilot
B64C 2700/6269
. . . . .
Control from outside the aircraft
Collapse
B64C 2700/627
. . . .
Influencing airflow over aircraft surfaces
B64C 2700/6271
. . . . .
by fluid flow around the aircraft
B64C 2700/6273
. . . . .
lift being provided by static devices, e.g. balloons
B64C 2700/6274
. . . . .
by other means, e.g. propellers, rotors, air jets
Collapse
B64C 2700/6276
. . .
Rotorcraft
Collapse
B64C 2700/6277
. . . .
with driven or windmilling propellers
Collapse
B64C 2700/6278
. . . . .
Features common for any type of rotorcraft
B64C 2700/628
. . . . . .
Devices for the adjustment of the blades ; Folding blades
Collapse
B64C 2700/6281
. . . . .
Helicopters
Collapse
B64C 2700/6283
. . . . . .
Rotor construction
Collapse
B64C 2700/6284
. . . . . . .
Blades control devices
B64C 2700/6285
. . . . . . . .
Drag reducing devices for an inoperative rotor
Collapse
B64C 2700/6287
. . . . . . .
Rotor drives
B64C 2700/6288
. . . . . . . .
Hydraulic, electric or man powered rotorcrafts
B64C 2700/629
. . . . . . .
Rotors which can be used as propulsion means
B64C 2700/6291
. . . . . . .
Rotors stowable in the wings
B64C 2700/6292
. . . . . .
Control means using other devices than the rotor
B64C 2700/6294
. . . . . .
Construction parts, e.g. frames ; Balancing ; Flight control ; Brakes
Collapse
B64C 2700/6295
. . .
Aircraft specially adapted for special uses
B64C 2700/6297
. . . .
for military uses
B64C 2700/6298
. . .
Gliders
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Last Modified: 04/16/2013 4:31:16 PM