US Patent Class 244
AERONAUTICS



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Current as of: June, 1999
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  DF  CLASS NOTES
1 R  DF  MISCELLANEOUS
1 N  DF  .~ Noise abatement
1 A  DF  .~ Lightning arresters and static eliminators
1 TD  DF  .~ Trailing devices
2  DF  COMPOSITE AIRCRAFT
3  DF  .~ Trains
3.1  DF  MISSILE STABILIZATION OR TRAJECTORY CONTROL
3.11  DF  .~ Remote control
3.12  DF  .~.~ Trailing wire
3.13  DF  .~.~ Beam rider
3.14  DF  .~.~ Radio wave
3.15  DF  .~ Automatic guidance
3.16  DF  .~.~ Optical (includes infrared)
3.17  DF  .~.~.~ Optical correlation
3.18  DF  .~.~.~ Celestial navigation
3.19  DF  .~.~ Radio wave
3.2  DF  .~.~ Inertial
3.21  DF  .~.~ Attitude control mechanisms
3.22  DF  .~.~.~ Fluid reaction type
3.23  DF  .~ Stabilized by rotation
3.24  DF  .~ Externally mounted stabilizing appendage (e.g., fin)
3.25  DF  .~.~ Removable
3.26  DF  .~.~ Sliding
3.27  DF  .~.~ Collapsible
3.28  DF  .~.~.~ Longitudinally rotating
3.29  DF  .~.~.~ Radially rotating
3.3  DF  .~.~ Extending beyond rear of missile
158 R  DF  SPACECRAFT
159  DF  .~ Space station
160  DF  .~ Reentry vehicle
161  DF  .~.~ Rendezvous and docking
162  DF  .~.~ Manned
163  DF  .~.~.~ Environmental control
164  DF  .~ Attitude control
165  DF  .~.~ By gyroscope or flywheel
166  DF  .~.~ By magnetic effect
167  DF  .~.~ By gravity gradient
168  DF  .~.~ By solar pressure
169  DF  .~.~ By jet motor
170  DF  .~.~ By nutation damper
171  DF  .~.~ With attitude sensor means
172  DF  .~ With propulsion
173  DF  .~ With solar panel
158 A  DF  .~ Exterior surface air resistance heat control
4 R  DF  AIRCRAFT, HEAVIER-THAN-AIR
5  DF  .~ Airplanes, weight diminished by bouyant gas
6  DF  .~ Airplane and helicopter sustained
7 R  DF  .~.~ Convertible
7 A  DF  .~.~.~ Rotary wing
7 B  DF  .~.~.~ Tail sitters
7 C  DF  .~.~.~ Tilting wing
8  DF  .~ Airplane and auto-rotating wing sustained
9  DF  .~ Airplane and paddle wheel sustained
10  DF  .~ Airplane and cylindrical rotor sustained
11  DF  .~ Airplane and beating wing sustained
12.1  DF  .~ Airplane and fluid sustained
12.2  DF  .~.~ Circular
12.3  DF  .~.~ Dual propulsion
12.4  DF  .~.~ Thrust tilting
12.5  DF  .~.~ With thrust diverting
12.6  DF  .~.~ Channel wing
13  DF  .~ Airplane sustained
14  DF  .~.~ Aerial torpedoes
15  DF  .~.~ Fluid propelled
16  DF  .~.~ Glider
17.11  DF  .~ Helicopter or auto-rotating wing sustained, i.e., gyroplanes
17.13  DF  .~.~ Automatic or condition responsive control
17.15  DF  .~.~ With safety lowering device
17.17  DF  .~.~ With landing, mooring, or nonaerial propelling or steering gear
17.19  DF  .~.~ With auxiliary propulsion, counter-troque or steering device
17.21  DF  .~.~.~ Auxiliary rotor
17.23  DF  .~.~ Having plural lifting rotors
17.25  DF  .~.~ Lifting rotor having lift direction varying means
17.27  DF  .~.~ Lifting rotor supports, e.g., pylons
19  DF  .~ Paddle wheel sustained
20  DF  .~.~ Feathering
21  DF  .~ Cylindrical rotor sustained
22  DF  .~ Beating wing sustained
23 R  DF  .~ Fluid sustained
23 A  DF  .~.~ Lifting thrusters
23 B  DF  .~.~ Dual propulsion means, horizontal and vertical
23 C  DF  .~.~ Circular configuration
23 D  DF  .~.~ Thrust diverters
4 A  DF  .~ Body attached
24  DF  AIRCRAFT, LIGHTER-THAN-AIR
25  DF  .~ Airships with sustaining wings
26  DF  .~ Airship and helicopter sustained
27  DF  .~ Airship and paddle wheel sustained
28  DF  .~ Airship and beating wing sustained
29  DF  .~ Airship and fluid sustained
30  DF  .~ Airships
31  DF  .~ Balloons
32  DF  .~.~ With parachutes
33  DF  .~.~ Captive
34 R  DF  AIRCRAFT SUSTENTATION
35 R  DF  .~ Sustaining airfoils
36  DF  .~.~ Lifting fuselages
37  DF  .~.~ Lifting struts
38  DF  .~.~ Resiliently mounted
39  DF  .~.~ Rotatable
198  DF  .~.~ With lift modification
199  DF  .~.~.~ By vortex generator or dissipator
200  DF  .~.~.~ By characteristic of airfoil's skin
201  DF  .~.~.~ Variable
202  DF  .~.~.~.~ With landing gear
203  DF  .~.~.~.~ Condition responsive
204  DF  .~.~.~.~ By controlling boundary layer
205  DF  .~.~.~.~.~ With ionic or electrostatic surface
206  DF  .~.~.~.~.~ With rotating member
207  DF  .~.~.~.~.~ With blowing
208  DF  .~.~.~.~.~.~ And suction
209  DF  .~.~.~.~.~ With suction
210  DF  .~.~.~.~.~ With nose slot
211  DF  .~.~.~.~.~.~ Having trailing edge flap
212  DF  .~.~.~.~.~ Having trailing edge flap
213  DF  .~.~.~.~ By flap and/or spoiler
214  DF  .~.~.~.~.~ At leading edge
215  DF  .~.~.~.~.~ At trailing edge
216  DF  .~.~.~.~.~.~ Variable gap type, e.g., "Fowler Flap"
217  DF  .~.~.~.~.~.~ Plural, relatively pivotable
218  DF  .~.~.~.~ Area
219  DF  .~.~.~.~ Camber
45 R  DF  .~.~ Arrangement
46  DF  .~.~.~ Variable
47  DF  .~.~.~.~ Dihedral
48  DF  .~.~.~.~ Incidence
49  DF  .~.~.~.~ Folding
45 A  DF  .~.~.~ Canard
35 A  DF  .~.~ Compressible flow
34 A  DF  .~ Annular airfoils
50  DF  AIRCRAFT PROPULSION AND STEERING ON LAND OR WATER
51  DF  AIRCRAFT, STEERING PROPULSION
52  DF  .~ Fluid
53 R  DF  AIRCRAFT POWER PLANTS
54  DF  .~ Mounting
55  DF  .~ Arrangement
56  DF  .~.~ Tilting
57  DF  .~ Radiator arrangement
58  DF  .~ Auxiliary
59  DF  .~ High altitude
60  DF  .~ Transmission of power
61  DF  .~ Power plant using airship gas as fuel
53 A  DF  .~ Starters
53 B  DF  .~ Air intakes
62  DF  AIRCRAFT PROPULSION
63  DF  .~ Launching
64  DF  .~ Manual
65  DF  .~ Screw
66  DF  .~.~ Tilting
67  DF  .~.~ Body encircling
68  DF  .~.~ Elongated
69  DF  .~.~ Contra-propeller arrangements
70  DF  .~ Paddle wheel
71  DF  .~ Reciprocating propeller
72  DF  .~ Beating wing
73 R  DF  .~ Fluid
74  DF  .~.~ Explosive jet
73 B  DF  .~.~ Vacuum induced by radial flow
73 C  DF  .~.~ Radial outward and downward flow
75 R  DF  AIRCRAFT CONTROL
76 R  DF  .~ Automatic
175  DF  .~.~ Electric course control
176  DF  .~.~.~ Spaceship control
177  DF  .~.~.~ Multiple-axis altitude stabilization
178  DF  .~.~.~.~ Trim control
179  DF  .~.~.~.~ By change in bank
180  DF  .~.~.~ By change in altitude
181  DF  .~.~.~.~ By change in pitch, angle of attack or flight path
182  DF  .~.~.~.~ By change in speed
183  DF  .~.~.~ Of aircraft on its landing course
184  DF  .~.~.~.~ By steering or yaw
185  DF  .~.~.~.~.~ And vertical glide path control
186  DF  .~.~.~.~ Vertical glide path control
187  DF  .~.~.~.~.~ With "flare-out" detection
188  DF  .~.~.~.~.~ Slope control by throttle
189  DF  .~.~.~ By remote radio signal
190  DF  .~.~.~.~ Of pilotless aircraft
191  DF  .~.~.~ Acceleration control
192  DF  .~.~.~ With "dead-zone" control
193  DF  .~.~.~ With "softener" circuit
194  DF  .~.~.~ Monitoring circuit or response
195  DF  .~.~.~.~ Self-adaptive control
196  DF  .~.~.~ Override of automatic control by human pilot
197  DF  .~.~.~.~ By engaging manual control system
78  DF  .~.~ Fluid
79  DF  .~.~ Gyroscope actuated
80  DF  .~.~ Gravity actuated
81  DF  .~.~ Operated by landing
82  DF  .~.~ Vane operated
76 A  DF  .~.~ Motor torque control of flaps or tabs
76 B  DF  .~.~ Velocity operated devices
76 C  DF  .~.~ Gust compensators
76 J  DF  .~.~ Steerable jets
220  DF  .~ Pilot operated
221  DF  .~.~ Control system
222  DF  .~.~.~ Other than hand or foot actuated
223  DF  .~.~.~ With feel
224  DF  .~.~.~ With locking means
225  DF  .~.~.~ With dual purpose surface structure (e.g., elevons)
226  DF  .~.~.~ Fluid
227  DF  .~.~.~.~ With electric control
228  DF  .~.~.~ Electric
229  DF  .~.~.~ Dual
230  DF  .~.~.~ With variable output
231  DF  .~.~.~ With interengaging gearing
232  DF  .~.~.~ With cable and linkage
233  DF  .~.~.~ Cable
234  DF  .~.~ Controller
235  DF  .~.~.~ Rudder bar and pedal
236  DF  .~.~.~ Electrical pickup
237  DF  .~.~.~ Three-way steering, single control
87  DF  .~ Rudders and empennage
88  DF  .~.~ Rudders universally mounted
89  DF  .~.~ Elevators both front and rear
90 R  DF  .~.~ Ailerons and other roll control devices
90 A  DF  .~.~.~ Roll control spoilers
90 B  DF  .~.~.~ Balanced air pressure
91  DF  .~ Vertical fins
92  DF  .~ Stabilizing propellers
93  DF  .~ Stabilizing weights
94  DF  .~.~ Ballast storage and release
95  DF  .~.~ Ballast making
96  DF  .~ Airship control
97  DF  .~.~ Buoyancy varying
98  DF  .~.~ Gas bag inflation
99  DF  .~.~ Gas release
75 A  DF  .~ Flutter prevention
100 R  DF  LANDING GEAR
101  DF  .~ Amphibian
102 R  DF  .~ Retractable
102 A  DF  .~.~ Interconnected elements
102 SL  DF  .~.~ Strut locks
102 SS  DF  .~.~ Strut shortening
103 R  DF  .~ Wheel
104 R  DF  .~.~ Resiliently mounted
104 CS  DF  .~.~.~ Coil spring
104 FP  DF  .~.~.~ Fluid pressure
104 LS  DF  .~.~.~ Leaf spring
103 S  DF  .~.~ Prerotation
103 W  DF  .~.~ Crosswind gear
105  DF  .~ Water landing
106  DF  .~.~ Flying boat
107  DF  .~.~ Emergency
108  DF  .~ Skids
109  DF  .~ Tail supports
100 C  DF  .~ Endless track
100 A  DF  .~ Inflatable
110 R  DF  RETARDING AND RESTRAINING DEVICES
111  DF  .~ Wheel brake arrangement
112  DF  .~ Water brake arrangement
113  DF  .~ Aerodynamic retarders
110 A  DF  .~ Brake
110 B  DF  .~ Thrust reversers
110 C  DF  .~ Cable or net support
110 D  DF  .~ Aerodynamic braking
110 E  DF  .~ Landing platforms
110 F  DF  .~ Snares
110 G  DF  .~ Arresting hoods
110 H  DF  .~ Friction brakes
114 R  DF  LANDING FIELD ARRANGEMENT
115  DF  .~ Mooring devices
116  DF  .~.~ Movable
114 B  DF  .~ Blast deflectors
117 R  DF  AIRCRAFT STRUCTURE
118.1  DF  .~ Load (e.g., cargo) accommodation
118.2  DF  .~.~ Removable, load bearing, airframe section
118.5  DF  .~ Passenger or crew accommodation
118.6  DF  .~.~ Seating arrangement: berth or berthage
119  DF  .~ Fuselage and body construction
120  DF  .~.~ Sectional
121  DF  .~.~ Shields and other protective devices
122 R  DF  .~.~ Seats and safety belts
122 A  DF  .~.~.~ Ejection seats
122 AB  DF  .~.~.~.~ Catapult and rocket combined
122 AC  DF  .~.~.~.~.~ Catapult
122 AD  DF  .~.~.~.~.~ Rocket
122 AE  DF  .~.~.~.~ Automatic sequence
122 AF  DF  .~.~.~.~.~ Canopy release
122 AG  DF  .~.~.~.~.~ Restraint positioning and protective devices
122 AH  DF  .~.~.~.~.~ Seat separation
122 B  DF  .~.~.~ Safety belts
123  DF  .~ Airfoil construction
124  DF  .~.~ Sectional
125  DF  .~ Airship hull construction
126  DF  .~ Airship skin construction
127  DF  .~ Airship load attachment
128  DF  .~ Airship gas cell construction and arrangement
129.1  DF  .~ Details
129.2  DF  .~.~ Fire prevention devices
129.3  DF  .~.~ Windows
129.4  DF  .~.~ Closures
129.5  DF  .~.~.~ Door
118.3  DF  .~.~.~.~ Displaceable to function as ramp
129.6  DF  .~.~ Steps
130  DF  .~.~ Aerodynamic resistance reducing
131  DF  .~.~ Joints and connections
132  DF  .~.~ Skin fastening devices
133  DF  .~.~ Materials of construction
134 R  DF  .~ Ice prevention
134 A  DF  .~.~ Flexible surfaces
134 B  DF  .~.~ Heating fluid in airfoil
134 C  DF  .~.~ Deicing fluid on airfoil exterior
134 D  DF  .~.~ Electric
134 E  DF  .~.~ Nature of surface
134 F  DF  .~.~ Initiators and indicators
135 R  DF  .~ Fuel supply
135 A  DF  .~.~ Aircraft refueling
135 B  DF  .~.~ Flexible containers
135 C  DF  .~.~ Fuel balancing systems
136  DF  .~ Material discharging and diffusing
137.1  DF  .~ Passenger or cargo loading or discharging
137.2  DF  .~.~ Passenger
137.3  DF  .~.~ Aerial cargo unloading by parachute extraction
137.4  DF  .~.~ Releasable, externally mounted cargo
117 A  DF  .~ Skin cooling
138 R  DF  SAFETY LOWERING DEVICES
139  DF  .~ Entire aircraft
140  DF  .~ Passenger compartment
141  DF  .~.~ Seat
142  DF  .~ Parachutes
143  DF  .~.~ Garment attached
144  DF  .~.~ Aircraft element convertible to parachute
145  DF  .~.~ Canopy construction
146  DF  .~.~ Inflated bracing
147  DF  .~.~ Storage and release
148  DF  .~.~.~ Packs
149  DF  .~.~.~ Opening devices
150  DF  .~.~.~ Timing mechanism
151 R  DF  .~.~ Harness
151 A  DF  .~.~.~ Parchute harness connection
151 B  DF  .~.~.~ Parachute load releasing
152  DF  .~.~ Control devices
138 A  DF  .~ Rotating vanes
153 R  DF  KITES
154  DF  .~ Airplane type
155 R  DF  .~ Accessories
155 A  DF  .~.~ Kite controls
153 A  DF  .~ Rotating
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CROSS-REFERENCE ART COLLECTIONS
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900  DF  LIGHTWEIGHT, WINGED, AIR VEHICLE (E,G,. ULTRALIGHT or HANG GLIDER)
901  DF  .~ Having delta shaped wing
902  DF  .~ Having parachute type wing
903  DF  .~ Powered
904  DF  .~ Miscellaneous hardware or control
905  DF  INFLATABLE EVACUATION SLIDE