| | CLASS NOTES |
| 1 | DF | METHOD OF OPERATION |
| 2 | DF | HAVING FRANGIBLE OR FUSIBLE PART OR CONNECTION |
| 3 | DF | ACTUATION DIRECTLY RESPONSIVE TO MAGNETIC OR ELECTRICAL EFFECT |
| 4 | DF | ROTARY SKIN FRICTION TYPE (E.G., MAGNUS ROTOR, ETC.) |
| 5 | DF | WITH ILLUMINATION MEANS |
| 6 | DF | DRIVEN BY PULSATING OR DIVERSE WORKING FLUID |
| 7 | DF | WORKING MEMBER SUPPORTED ON ENDLESS FLEXIBLE CARRIER {1} |
| 9 | DF | WITH MEANS POSITIONING FLUID CURRENT DRIVEN IMPELLER RELATIVE TO FLOW DIRECTION {2} |
| 18 | DF | WITH GYROSCOPIC REFERENCE MEANS FOR ROTOR CONTROL |
| 19 | DF | SINGLE BLADE ROTARY IMPELLER WITH COUNTERBALANCE |
| 20 R | DF | DRIVE BY FLUID REACTION JET ON WORKING MEMBER {2} |
| 23 | DF | WITH MEANS MOVING WORKING FLUID DEFLECTING WORKING MEMBER PART DURING OPERATION (E.G., AILERON, ETC.) {1} |
| 25 | DF | INTERRELATED CONTROLS FOR IMPELLER AND DRIVE MEANS {2} |
| 31 | DF | WITH CONTROL MEANS RESPONSIVE TO NON-CYCLIC CONDITION SENSING, CENTRIFUGAL ACTUATION, TORQUE OR THRUST {9} |
| 54 | DF | OPERATED BY ART DEVICE {4} |
| 61 | DF | WITH MEASURING, TESTING, SIGNALLING OR INSPECTION MEANS |
| 62 | DF | REMOVABLE AUXILIARY ATTACHMENT TO WORK SURFACE |
| 63 | DF | AMBULANT, BODY SUPPORTED OR WITH CARRYING HANDLE |
| 64 | DF | TRANSLATORY REACTION MOTION {2} |
| 69 | DF | OPERATOR SUPPORTED MANUALLY ACTUATED TYPE {4} |
| 78 | DF | CRANK TYPE DIPPING OR STIRRING MOTION |
| 79 | DF | OSCILLATORY REACTION MOTION {4} |
| 84 | DF | BUOYANT OR INFLATABLE WORKING MEMBER |
| 85 | DF | FLOAT SUPPORTED {1} |
| 87 | DF | RADIALLY EXTENSIBLE OR RETRACTIBLE ROTOR WORKING MEMBER {2} |
| 90 R | DF | WITH FLUID PASSAGE IN WORKING MEMBER COMMUNICATING WITH WORKING FLUID {3} |
| 93 R | DF | AMBIENT FLUID OR EXHAUST GAS DIRECTED THROUGH HUB, FAIRING OR HOUSING {2} |
| 95 | DF | WITH HEATING, COOLING OR THERMAL INSULATION MEANS {1} |
| 98 | DF | SUSTAINED ANCILLARY MOVEMENT OF ROTARY WORKING MEMBER (E.G., CYCLIC FEATHERING, ETC.) {9} |
| 120 | DF | PLURAL IMPELLERS HAVING RELATIVE MOVEMENT OR INDEPENDENT SUPPORTS {5} |
| 131 | DF | ARTICULATED, RESILIENTLY MOUNTED OR SELF-SHIFTING IMPELLER OR WORKING MEMBER {7} |
| 142 | DF | WORKING MEMBER FOLDABLE, PIVOTABLE OR COLLAPSIBLE TO NON-USE POSITION {1} |
| 144 | DF | WITH WEIGHT-BALANCING MEANS {1} |
| 146 R | DF | COMBINED OR CONVERTIBLE {1} |
| 147 | DF | HAVING POSITIVE MEANS FOR IMPELLER ADJUSTMENT {6} |
| 169 R | DF | HAVING CLUTCH OR BRAKE MEANS {1} |
| 170 R | DF | SPECIFIC DRIVE OR TRANSMISSION MEANS {4} |
| 174 | DF | HAVING LUBRICATING, SEALING, PACKING OR SPECIFIC BEARING MEANS BETWEEN IMPELLER OR SHAFT AND STATIC PART |
| 175 | DF | DIVERSE IMPELLERS OR WORKING MEMBERS |
| 176 | DF | SPIRAL BLADE OR FLOW PASSAGE (360 DEGREE) {1} |
| 178 | DF | PERIMETRIC BLADING EXTENDING AXIALLY BETWEEN ANNULAR MEMBERS (E.G., SQUIRREL CAGE TYPE, ETC.) |
| 179 | DF | ROTOR HAVING FLOW CONFINING OR DEFLECTING WEB, SHROUD OR CONTINUOUS PASSAGE {4} |
| 194 | DF | LASHING BETWEEN WORKING MEMBERS OR EXTERNAL BRACING {2} |
| 197 R | DF | CUPPED REACTION SURFACE NORMAL TO ROTATION PLANE {3} |
| 198 R | DF | MULTIPLE AXIALLY SPACED WORKING MEMBERS {4} |
| 202 | DF | PROJECTING BLADE AXIS OFFSET FROM ROTATION AXIS |
| 203 | DF | UNSYMMETRICAL IMPELLER OR DISSIMILAR WORKING MEMBERS |
| 204 R | DF | SPECIFIC WORKING MEMBER MOUNT {9} |
| 223 R | DF | SPECIFIC BLADE STRUCTURE (E.G., SHAPE, MATERIAL, ETC.) {18} |
| 244 R | DF | SUPPORT MOUNTING, CARRIER OR FAIRING STRUCTURE {4} |
| 247 R | DF | PROTECTIVE SCREEN OR GUARD {1} |
| 248 | DF | MISCELLANEOUS (E.G., BLADE ROOT OR ROOT BLOCK, ETC.) |
| | ****************************** |
| | CROSS-REFERENCE ART COLLECTIONS |
| | ****************************** |
| 500 | DF | VIBRATION DAMPING FEATURES |
| 501 | DF | FLY BRUSH TYPE IMPELLER |
| | ****************************** |
| | DIGESTS |
| | ****************************** |
| DIG 1 | DF | Stalker |
| DIG 2 | DF | Formulas of curves, etc. |
| DIG 3 | DF | Sheet metal |
| DIG 4 | DF | Fluid current motor and generator |
| DIG 5 | DF | Variable camber or chord length |
| DIG 6 | DF | Supports for natural fluid current motors |
| DIG 7 | DF | Inlet and outlet |
| DIG 8 | DF | Stack or chimney with fluid motor |
| DIG 9 | DF | Savonius |
