US Patent Class 74
MACHINE ELEMENT OR MECHANISM-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
1 R  DF  MISCELLANEOUS {1}
1.5  DF  ESCAPEMENTS
2  DF  AUTOMATIC OPERATION OR CONTROL (E.G., TRIPS) {3}
5 R  DF  GYROSCOPES {10}
6  DF  ENGINE STARTERS {3}
10 R  DF  SHAFT OPERATORS (RADIO TUNER TYPE) {8}
813 R  DF  ROTARY MEMBER OR SHAFT INDEXING, E.G., TOOL OR WORK TURRET {8}
11  DF  POWER TAKE-OFF {6}
16  DF  POWER TABLES AND STANDS
17  DF  WASHER AND WRINGER
17.5  DF  FULL STROKE MECHANISM
17.8  DF  MOTION TRANSFER THROUGH IMPERFORATE FLEXIBLE SEAL
18  DF  FLEXIBLE SEALING DIAPHRAGM ATTACHED TO MOVING ROD AND TO CASING {2}
828  DF  ALTERNATING-MOTION DRIVEN DEVICE WITH MEANS DURING OPERATION TO ADJUST STROKE {2}
840  DF  ROTARY DRIVEN DEVICE ADJUSTABLE DURING OPERATION RELATIVE TO ITS SUPPORTING STRUCTURE {2}
*  DF  MECHANICAL MOVEMENTS {15}
111  DF  MECHANICAL MOVEMENTS (INTERMITTENT GRIP TYPE) {3}
625  DF  ALTERNATE MANUAL OR POWER OPERATORS
640  DF  GEARING {31}
469  DF  CONTROL LEVER AND LINKAGE SYSTEMS {8}
*  DF  ELEMENTS {10}
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CROSS REFERENCE ART COLLECTION
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900  DF  PARTICULAR SHIFT PATTERN {1}
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FOREIGN ART COLLECTIONS
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DIGESTS
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DIG 1  DF  Hydraulic control systems automatic automotive controls
DIG 2  DF  Miscellaneous control systems (e.g., ship propulsion, machine tools, etc.)
DIG 3  DF  Movable van or blade torque converters
DIG 4  DF  Magnetic gearing
DIG 5  DF  Gas turbine with gearing
DIG 6  DF  Transistor-electronic gearing controls
DIG 7  DF  Indicators-sensors and meters
DIG 8  DF  Marine control-ship transmission control means
DIG 9  DF  Perpetual motion gimmicks
DIG 10  DF  Polymer digest - plastic gears
DIG 11  DF  Creeper speed
DIG 12  DF  Novikov gears