B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
 B01 - 
B07
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION
Method
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/LIQUID OR SOLID/GAS SEPARATION
Method
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/SOLID SEPARATION
Method
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB07B
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
Apparatus
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB04B, B04C
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
  
TRANSPORTING
 B64
AIRCRAFT; AVIATION; COSMONAUTICS
 B64C
AEROPLANES; HELICOPTERS (air-cushion vehicles B60V)
 B64C

Note(s)

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.  [3]

 B64C
Subclass index
STRUCTURES, FAIRINGS
Features common to different elements 1/00
Fuselages; wings; stabilising surfaces 1/00; 3/00; 5/00
Other structural elements 7/00
PROPELLERS, FLIGHT CONTROL
Propellers 11/00
Adjustable control surfaces or members; control systems 9/00; 13/00
Control by jet reaction 15/00
Stabilisation and controls not otherwise provided for 17/00, 19/00
MODIFYING LIFT BY ACTION ON AIR-FLOW 13/00, 21/00, 23/00
ALIGHTING GEAR 25/00
AIRCRAFT KINDS AND THEIR COMPONENTS NOT OTHERWISE PROVIDED FOR
Supersonic 30/00
Seaplanes 35/00
Aircraft intended to be sustained without power plant; powered hand-glider-type aircraft; microlight aircraft 31/00
Convertible aircraft 37/00
Vertical-take-off or landing aircraft 29/00
Rotorcraft; ornithopters 27/00; 33/00
Others 39/00
 B64C 1/00 - 
B64C 7/00
Aircraft structures or fairings
P:70 B64C 1/00
Fuselages; Constructional features common to fuselages, wings, stabilising surfaces, or the like (aerodynamical features common to fuselages, wings, stabilising surfaces, or the like B64C 23/00; flight-deck installations B64D)
 B64C 1/06
·  Frames; Stringers; Longerons
 B64C 1/08
·  ·  Geodetic or other open-frame structures
 B64C 1/10
·  ·  Bulkheads
 B64C 1/12
·  ·  Construction or attachment of skin panels
 B64C 1/14
·  Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens (fairings movable in conjunction with undercarriage elements B64C 25/16; bomb doors B64D 1/06)
 B64C 1/16
·  specially adapted for mounting power plant
 B64C 1/18
·  Floors
 B64C 1/20
·  ·  specially adapted for freight
 B64C 1/22
·  Other structures integral with fuselages to facilitate loading
 B64C 1/24
·  Steps mounted on, and 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 dimensions of aircraft
 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
 B64C 1/40
·  Sound or heat insulation
P:80 B64C 3/00
Wings (stabilising surfaces B64C 5/00; ornithopter wings B64C 33/02)
 B64C 3/10
·  Shape of wings
 B64C 3/14
·  ·  Aerofoil profile
 B64C 3/16
·  ·  Frontal aspect
 B64C 3/18
·  Spars; Ribs; Stringers (attaching wing unit to fuselage B64C 1/26)
 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
 B64C 3/38
·  Adjustment of complete wings or parts thereof
 B64C 3/40
·  ·  Varying angle of sweep
 B64C 3/42
·  ·  Adjusting about chordwise axes
 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
 B64C 3/54
·  ·  Varying in area (flaps extendable to increase camber B64C 3/44)
 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)
P:60 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
 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
P:120 B64C 7/00
Structures or fairings not otherwise provided for
 B64C 7/02
·  Nacelles
P:90 B64C 9/00
Adjustable control surfaces or members, e.g. rudders (trimming stabilising surfaces B64C 5/10; systems for actuating flying-control surfaces B64C 13/00)
 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
 B64C 9/14
·  forming slots (boundary-layer control B64C 21/00)
 B64C 9/16
·  ·  at the rear of the wing
 B64C 9/18
·  ·  ·  by single flaps
 B64C 9/20
·  ·  ·  by multiple flaps
 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
 B64C 9/32
·  Air braking surfaces (braking by parachutes B64D 17/80)
 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
P:100 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)
 B64C 11/02
·  Hub construction
 B64C 11/04
·  ·  Blade mountings
 B64C 11/06
·  ·  ·  for variable-pitch blades
 B64C 11/08
·  ·  ·  for non-adjustable blades
 B64C 11/10
·  ·  ·  ·  rigid
 B64C 11/12
·  ·  ·  ·  flexible
 B64C 11/14
·  ·  Spinners
 B64C 11/16
·  Blades
 B64C 11/18
·  ·  Aerodynamic features
 B64C 11/20
·  ·  Constructional features
 B64C 11/22
·  ·  ·  Solid blades
 B64C 11/24
·  ·  ·  Hollow blades
 B64C 11/26
·  ·  ·  Fabricated blades
 B64C 11/28
·  ·  ·  Collapsible or foldable blades
 B64C 11/30
·  Blade pitch-changing mechanisms
 B64C 11/32
·  ·  mechanical
 B64C 11/34
·  ·  ·  automatic
 B64C 11/36
·  ·  ·  non-automatic
 B64C 11/38
·  ·  fluid, e.g. hydraulic
 B64C 11/40
·  ·  ·  automatic
 B64C 11/42
·  ·  ·  non-automatic
 B64C 11/44
·  ·  electric
 B64C 11/46
·  Arrangements of, or constructional features peculiar to, multiple propellers
 B64C 11/48
·  ·  Units of two or more coaxial propellers
 B64C 11/50
·  ·  Phase synchronisation between multiple propellers
P:0 B64C 13/00
Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
 B64C 13/02
·  Initiating means
 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)
 B64C 13/16
·  ·  actuated automatically, e.g. responsive to gust detectors
 B64C 13/18
·  ·  ·  using automatic pilot (automatic pilots per se G05D 1/00)
 B64C 13/20
·  ·  ·  using radiated signals
 B64C 13/22
·  ·  ·  readily revertible to personal control
 B64C 13/24
·  Transmitting means
 B64C 13/26
·  ·  without power amplification or where power amplification is irrelevant
 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
 B64C 13/38
·  ·  with power amplification
 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
 B64C 13/50
·  ·  ·  using electrical energy
P:20 B64C 15/00
Attitude, flight direction, or altitude control by jet reaction (details of jet-engine plants, e.g. of nozzles or jet pipes, F02K)  [3]
 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)
P:40 B64C 17/00
Aircraft stabilisation not otherwise provided for
 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
P:50 B64C 19/00
Aircraft control not otherwise provided for
 B64C 19/02
·  Conjoint controls
 B64C 21/00 - 
B64C 23/00
Influencing air-flow over aircraft surfaces, not otherwise provided for
P:10 B64C 21/00
Influencing air-flow over aircraft surfaces by affecting boundary-layer flow (boundary-layer control in general F15D)
 B64C 21/02
·  by use of slot, ducts, porous areas, or the like
 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
P:30 B64C 23/00
Influencing air-flow over aircraft surfaces, not otherwise provided for
 B64C 23/02
·  by means of rotating members of cylindrical or similar form
 B64C 23/04
·  by generating shock waves
 B64C 23/06
·  by generating vortices
 B64C 23/08
·  using Magnus effect
P:110 B64C 25/00
Alighting gear (air-cushion alighting gear B60V 3/08)
 B64C 25/02
·  Undercarriages
 B64C 25/04
·  ·  Arrangement or disposition on aircraft
 B64C 25/06
·  ·  fixed
 B64C 25/08
·  ·  non-fixed, e.g. jettisonable
 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
 B64C 25/18
·  ·  ·  ·  Operating mechanisms
 B64C 25/20
·  ·  ·  ·  ·  mechanical
 B64C 25/22
·  ·  ·  ·  ·  fluid
 B64C 25/24
·  ·  ·  ·  ·  electric
 B64C 25/26
·  ·  ·  ·  ·  Control or locking systems therefor
 B64C 25/28
·  ·  ·  ·  ·  ·  with indicating or warning devices
 B64C 25/30
·  ·  ·  ·  ·  ·  emergency actuated
 B64C 25/32
·  characterised by elements which contact the ground or similar surface (arrester hooks B64C 25/68)
 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
 B64C 25/40
·  ·  the elements being rotated before touch-down
 B64C 25/42
·  ·  Arrangement or adaptation 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)  [4]
 B64C 25/44
·  ·  ·  Actuating mechanisms
 B64C 25/46
·  ·  ·  ·  Brake regulators for preventing skidding or aircraft somersaulting
 B64C 25/48
·  ·  ·  ·  differentially operated for steering purposes
 B64C 25/50
·  ·  Steerable undercarriages; Shimmy-damping (steering devices applicable to land vehicles B62D)
 B64C 25/52
·  ·  Skis or runners
 B64C 25/54
·  ·  Floats
 B64C 25/56
·  ·  ·  inflatable (connection of valves to inflatable elastic bodies B60C 29/00)
 B64C 25/58
·  ·  Arrangements or adaptations of shock-absorbers or springs (shimmy-dampers B64C 25/50; vehicle suspension arrangements in general B60G; shock-absorbers per se F16F)
 B64C 25/60
·  ·  ·  Oleo legs
 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)
 B64C 27/00 - 
B64C 39/00
Aircraft kinds or components not otherwise provided for
P:170 B64C 27/00
Rotorcraft; Rotors peculiar thereto (alighting gear B64C 25/00)
 B64C 27/02
·  Gyroplanes
 B64C 27/04
·  Helicopters
 B64C 27/06
·  ·  with single rotor
 B64C 27/08
·  ·  with two or more rotors
 B64C 27/10
·  ·  ·  arranged coaxially
 B64C 27/12
·  ·  Rotor drives
 B64C 27/14
·  ·  ·  Direct drive between power plant and rotor hub
 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
 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
 B64C 27/32
·  Rotors (features common to rotors and propellers B64C 11/00)
 B64C 27/33
·  ·  having flexing arms  [3]
 B64C 27/35
·  ·  having elastomeric joints  [3]
 B64C 27/37
·  ·  having articulated joints (B64C 27/33, B64C 27/35 take precedence)  [3]
 B64C 27/39
·  ·  ·  with individually articulated blades, i.e. with flapping or drag hinges  [3]
 B64C 27/41
·  ·  ·  with flapping hinge or universal joint, common to the blades  [3]
 B64C 27/43
·  ·  ·  ·  see-saw type, i.e. two-bladed rotor  [3]
 B64C 27/45
·  ·  ·  with a feathering hinge only  [3]
 B64C 27/46
·  ·  Blades
 B64C 27/467
·  ·  ·  Aerodynamic features  [6]
 B64C 27/473
·  ·  ·  Constructional features  [6]
 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  [3]
 B64C 27/52
·  Tilting of rotor bodily relative to fuselage (of see-saw type construction B64C 27/43)
 B64C 27/54
·  Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
 B64C 27/56
·  ·  characterised by the control initiating means, e.g. manually actuated (B64C 27/58 takes precedence)
 B64C 27/57
·  ·  ·  automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust  [3]
 B64C 27/58
·  ·  Transmitting means, e.g. interrelated with initiating means or means acting on blades (initiating means B64C 27/56; means acting on blades B64C 27/72)
 B64C 27/59
·  ·  ·  mechanical  [3]
 B64C 27/605
·  ·  ·  ·  including swash plate, spider or cam mechanisms  [3]
 B64C 27/615
·  ·  ·  ·  including flaps mounted on blades  [3]
 B64C 27/625
·  ·  ·  ·  including rotating masses or servo rotors  [3]
 B64C 27/635
·  ·  ·  ·  specially for controlling lag-lead movements of blades  [3]
 B64C 27/64
·  ·  ·  using fluid pressure, e.g. having fluid power amplification  [3]
 B64C 27/68
·  ·  ·  using electrical energy, e.g. having electrical power amplification  [3]
 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
P:180 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; details of jet-engine plants, e.g. of nozzles or jet pipes, F02K)
 B64C 29/02
·  having its flight directional axis vertical when grounded
 B64C 29/04
·  ·  characterised by jet-reaction propulsion
P:190 B64C 30/00
Supersonic type aircraft  [3]
P:140 B64C 31/00
Aircraft intended to be sustained without power plant; Powered hang-glider-type aircraft; Microlight-type aircraft
 B64C 31/02
·  Gliders, e.g. sailplanes (hang-gliders B64C 31/028)  [6]
 B64C 31/024
·  ·  with auxiliary power plant  [6]
 B64C 31/028
·  Hang-glider-type aircraft; Microlight-type aircraft  [6]
 B64C 31/032
·  ·  having delta shaped wing  [6]
 B64C 31/036
·  ·  having parachute-type wing (parachutes B64D 17/00)  [6]
 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)
P:150 B64C 33/00
Ornithopters
 B64C 33/02
·  Wings; Actuating mechanisms therefor
P:160 B64C 35/00
Flying-boats; Seaplanes (alighting gear B64C 25/00)
 B64C 35/02
·  Flying-boat hulls  [3]
P:130 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)
P:200 B64C 39/00
Aircraft not otherwise provided for
 B64C 39/02
·  characterised by special use
 B64C 39/04
·  having multiple fuselages or tail booms  [3]
 B64C 39/06
·  having disc- or ring-shaped wings  [3]
 B64C 39/08
·  having multiple wings  [3]
 B64C 39/10
·  All-wing aircraft  [3]
 B64C 39/12
·  Canard-type aircraft  [3]