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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 74 | MACHINE ELEMENT OR MECHANISM |
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1R | MISCELLANEOUS |
1.5 | ESCAPEMENTS |
2 | AUTOMATIC OPERATION OR CONTROL (E.G., TRIPS) |
3 | Speed controlled |
3.5 | Retarded |
4 | Hit and miss |
5R | GYROSCOPES |
5.1 | With caging or parking means |
5.2 | With gimbal lock preventing means |
5.22 | Combined |
5.34 | Multiple gyroscopes |
5.4 | Gyroscope control |
5.41 | Erecting |
5.42 | By plural diverse forces |
5.43 | By jet |
5.44 | By weight |
5.45 | By friction |
5.46 | By magnetic field |
5.47 | By motor torque |
5.5 | Damping |
5.6R | With pick off |
5.7 | With rotor drive |
5.8 | Vertical gyroscopes |
5.9 | Horizontal gyroscopes |
5F | Flexure hinges for gyros |
5.95 | Flywheel structure |
6 | ENGINE STARTERS |
10R | SHAFT OPERATORS (RADIO TUNER TYPE) |
10.1 | Preselected position |
10.15 | Step by step |
10.2 | Rotatable stop and projectable abutment |
10.22 | Digital dial type |
10.27 | Plural operator |
10.41 | With detent or clicker |
10.45 | Plural shafts |
10.5 | Plural speed |
10.6 | Cam and follower |
10.7 | Tensioned flexible operator |
10.8 | Gear drive |
10.9 | Lever and linkage drive |
10A | Remote control |
813R | ROTARY MEMBER OR SHAFT INDEXING, E.G., TOOL OR WORK TURRET |
814 | With safety device or drive disconnect |
815 | With locating point adjusting |
816 | Preselected indexed position |
825 | Plural operators or input drives |
826 | With means to axially shift shaft |
827 | Single revolution input effects desired fractional output |
813C | Control means |
813L | Locking means |
11 | POWER TAKE-OFF |
12 | Speedometer |
13 | Wheel take-off |
15.2 | Plural take-off shafts |
15.4 | With independent change speed gearing |
15.6 | From shaft extension |
15.63 | Prime mover shaft, e.g., crank shaft |
15.66 | Change speed transmission shaft |
15.69 | Vehicle propeller shaft |
15.8 | Intermediate ends of power transmitting line |
16 | POWER TABLES AND STANDS |
17 | WASHER AND WRINGER |
17.5 | FULL STROKE MECHANISM |
17.8 | MOTION TRANSFER THROUGH IMPERFORATE FLEXIBLE SEAL |
18 | FLEXIBLE SEALING DIAPHRAGM ATTACHED TO MOVING ROD AND TO CASING |
828 | ALTERNATING-MOTION DRIVEN DEVICE WITH MEANS DURING OPERATION TO ADJUST STROKE |
829 | Constant length stroke with means to displace end limits |
831 | Stroke adjustable to zero and/or reversible in phasing |
840 | ROTARY DRIVEN DEVICE ADJUSTABLE DURING OPERATION RELATIVE TO ITS SUPPORTING STRUCTURE |
MECHANICAL MOVEMENTS |
20 | Oscillating to reciprocating and alternating rotary |
21 | Oscillating to reciprocating and intermittent rotary |
22R | Rotary to reciprocating and rotary |
23 | Rotary to reciprocating and alternating rotary |
24 | Rotary to reciprocating and intermittent rotary |
25 | Rotary to or from reciprocating or oscillating |
26 | Head motions |
27 | Reciprocating carriage motions |
29 | Rack and pinion type |
30 | Shifting rack |
31 | Shiftable pinion |
32 | Segmental pinion |
33 | Alternately rotated pinion |
34 | Clutchable gears |
36 | Overcoming dead center |
37 | Belt or chain carried member |
38 | Crank, lever, toggle, and slide |
39 | Crank, lazy-tong, and slide |
40 | Crank, pitman, lever, and slide |
42 | Crank, pitman, and lever |
44 | Crank, pitman, and slide |
45 | Crank, lever, and slide |
47 | Crank and lever |
49 | Crank and slide |
51 | Crank and multiple pitmans |
52 | Planetary gearing and slide |
53 | Cam, lever, and slide |
54 | Cam and lever |
55 | Cam and slide |
61 | Unbalanced weights |
62 | Trammel-pitman |
63 | Rotary to rotary |
64 | Inertia or centrifugal transmitters |
65 | Crank, pitman, lever, and crank |
66 | Crank, lever, and crank |
67 | Crank, pitman, and crank |
68 | Cranks, link connected |
69 | Cranks, slidable connections |
70 | Rotary to alternating rotary |
71 | Mangle connections |
75 | Crank, pitman, and lever |
76 | Reciprocating rack connections |
79 | Oscillating rack connections |
82 | Flexible connector type |
83 | Associated inertia devices |
84R | Rotary to intermittent unidirectional motion |
86 | Rotary to gyratory |
88 | Reciprocating or oscillating to intermittent unidirectional motion |
89 | Reciprocating or oscillating to or from alternating rotary |
89.23 | Including screw and nut |
89.24 | Shaft shorter than nut |
89.25 | Auxiliary drive (e.g., fluid piston, etc.) for load |
89.26 | Alternate power path operable on failure of primary |
89.27 | Single input split into two intermediate outputs that are subsequently superposed into a single output |
89.28 | Single input, plural outputs |
89.29 | Plural inputs, single output |
89.32 | Carriage surrounding, guided by, and primarily supported by member other than screw (e.g., linear guide, etc.) |
89.33 | Carriage surrounded, guided, and primarily supported by member other than screw (e.g., linear guide, etc.) |
89.34 | Shaft moves through rotary drive means |
89.35 | Plural screws in series (e.g., telescoping, etc.) |
89.36 | Deflection related |
89.37 | Limit stop |
89.38 | Including means to selectively transmit power (e.g., clutch, etc.) |
89.39 | Means to selectively lock or retard screw or nut |
89.4 | Contamination related |
89.42 | Backlash |
89.43 | Pressurized fluid introduced between nut and screw |
89.44 | Lubrication |
89.45 | Manually driven |
89.1 | Including inertia device |
89.13 | Including bevel gears |
89.14 | Including worm |
89.16 | Including spur gear |
89.2 | Including flexible drive connector (e.g., belt, chain, strand, etc.) |
96 | Oscillating to oscillating |
99R | Reciprocating to or from oscillating |
100.1 | Snap action |
101 | Compound lever and slide |
102 | Lever and slide |
103 | Straight line motions |
104 | Slidable connections |
105 | Link connections |
106 | Toggle transmissions |
107 | Cam connections |
108 | Flexible connections |
109 | Rack and pinion |
99A | Inclined ramp |
110 | Reciprocating to reciprocating |
111 | MECHANICAL MOVEMENTS (INTERMITTENT GRIP TYPE) |
112 | Rotary to intermittent unidirectional motion |
113 | Automatically controlled |
116 | Rotary crank or eccentric drive |
125.5 | Intermittently engaged clutch |
126 | Oscillation or reciprocation to intermittent unidirectional motion |
127 | Screw and nut devices |
128 | Slide actuator |
130 | Rack actuator |
Strap actuator |
141.5 | Lever actuator |
144 | Grip units and features |
625 | ALTERNATE MANUAL OR POWER OPERATORS |
640 | GEARING |
650 | Nonplanetary gearing differential type (e.g., gearless differentials) |
655 | Single gearing unit includes fluid drive |
661 | Plural prime movers selectively coupled to common output |
664 | Plural power paths from prime mover |
665R | Plural power paths to and/or from gearing |
670 | Alternate input connections single hand crank |
718 | Fluid drive divides or combines alternate paths |
720 | One path includes fluid drive |
721 | Friction-type gearing |
724 | Worm-type gearing |
665A | Single driven plural drives |
665F | Single drive plural driven |
665L | Plural drivers plural driven |
665Q | Alternate drivers and driven |
665P | Miscellaneous (plural power paths) |
730.1 | With fluid drive |
731.1 | Condition responsive control |
732.1 | With one or more controllers for gearing, fluid drive, or clutch |
745 | In series plural interchangeably locked nonplanetary units |
810.1 | Reversal of direction of power flow changes power transmission to alternate path |
216.3 | Toothed gear and recirculated unconnected elements |
318 | Alternating rotary or continuous |
319 | Alternating rotary |
325 | Interchangeably locked |
329 | Disconnectable counter shaft |
330 | Multiple concentric clutch shafts |
331 | Plurality of counter shafts |
332 | Internal-external gears |
333 | Combined gear and clutch |
335 | Control mechanism |
Automatic |
337.5 | Cam operated |
339 | Meshing assisters |
Longitudinally slidable |
Multiple spur gears |
347 | Multiple bevel gears |
Single spur gear |
350 | Single bevel gear |
351 | Pin or crown gears |
352 | Laterally slidable gears |
355 | Single forward and reverse speeds |
Slidable keys or clutches |
356 | Alternative clutch shaft |
Multiple clutch shafts |
Single clutch shaft |
380 | Pivotally supported |
388R | Follow-up mechanism |
390 | Eccentric driving shaft and axle |
391 | Central driving shaft in axle |
392 | Parallel shafts, adjustable gear mesh |
393 | Varying speed ratio |
395 | Adjustable |
404 | Reversing means |
405 | Disconnecting means |
406 | Displaceable elements |
409 | Backlash take-up |
410 | Pressure distributing |
411 | Yieldability in gear trains |
411.5 | With brake means for gearing |
412R | Directly cooperating gears |
413 | Parallel axes or shafts |
416 | Intersecting axes |
422 | Rack and pinion |
420 | Spur and bevel |
421R | Spur |
423 | Bevel |
424.5 | Spiral |
424.71 | Screw and nut |
424.72 | Plural longitudinally variably spaced nuts |
424.73 | Threadless |
424.74 | Non-linear screw |
424.75 | Thread geometry |
424.78 | Nut disengageable from screw |
424.81 | Rolling element engaging thread |
424.82 | Recirculating rolling elements |
424.83 | Plural independent recirculating element paths |
424.84 | Single thread common to plural paths |
424.85 | Roller return path in shaft |
424.86 | Return path geometry |
424.88 | Interconnected or cooperating rollers or roller structure |
424.89 | Non-recirculating rolling elements |
424.94 | Less than 360 degrees of contact between nut and screw |
424.6 | Driven rack or shaft |
424.7 | Screw |
425 | Worm |
412TA | Torque actuated safety devices |
431 | Gear and rotary bodies |
434 | Rotary bodies |
435 | Mutilated |
436 | Geneva |
437 | Irregular teeth and bodies |
438 | External and internal teeth |
439 | Sectional |
457 | Teeth |
467 | Lubrication |
469 | CONTROL LEVER AND LINKAGE SYSTEMS |
470 | Resilient connections |
471R | Multiple controlled elements |
473.1 | Transmission control |
473.11 | Fluid actuator |
473.12 | Electrical actuator |
473.13 | Occupant propelled vehicle |
473.15 | Transmission controlled by flexible cable |
473.16 | Foot operated |
473.18 | Control convertible between automatic and manual operation |
473.19 | Control of plural mechanisms (e.g., control of transmission and control of 4 - wheel drive) |
473.21 | Restriction of shift, gear selection, or gear engagement |
473.22 | Prevention of reverse shift |
473.23 | Separate actuator to disengage restrictor |
473.24 | Shift element interlock |
473.27 | Spherical restrictor |
473.28 | Resiliently biased restrictor |
473.29 | having vibration damper |
473.3 | Manually operated selector (e.g., remotely controlled device, lever, push button, rotary dial, etc.) |
473.36 | Particular element (e.g., shift fork, template, etc.) |
478 | Foot operated |
471XY | Control moves in two planes |
479.01 | Multiple controlling elements for single controlled element |
480R | Interconnected |
483R | Interlocked |
484R | Steering and controls assemblies |
490 | Antirattling elements |
490.01 | Robotic arm |
490.02 | Including power cable or connector |
490.03 | Including electric motor |
490.04 | Including flaccid drive element |
490.05 | Joint between elements |
490.07 | Power elements as controlling elements |
490.08 | Planar surface with orthogonal movement and rotation |
490.09 | Planar surface with orthogonal movement only |
490.1 | Pair of power elements |
490.11 | Power and manual controlling elements |
490.12 | Manual controlling elements |
491 | Hand operated |
492 | Steering posts |
500.5 | Flexible transmitter (e.g., Bowden cable) |
501.5R | Constant tension sustaining |
501.6 | And hand operator |
502 | Slidable |
502.1 | For moving a mirror |
502.2 | Single rotatable lever (e.g., for bicycle brake or derailleur) |
502.3 | Including rolling antifriction elements |
502.4 | And sheath support, connector, or anchor |
502.5 | Specific cable or sheath structure |
502.6 | Specific cable connector or guide |
503 | Sliding rod |
504 | Rotatable rod, shaft, or post |
512 | Foot operated |
515R | Knee operated |
516 | Variable output force |
Elements |
519 | Levers |
527 | Detents |
528 | Hand crank |
529 | Interrelated lever release |
530 | Gear |
531 | Friction |
532 | Lever engaging |
533 | Lever engaging rack |
540 | Lever carried rack |
543 | Handles |
544 | Extension |
545 | Hand crank |
548 | Shaft connections |
551.1 | Handle bars |
551.2 | Spring biased or supported |
551.3 | Folding or adjustable |
551.8 | Attachments and accessories |
551.9 | Handholds and grips |
552 | Hand wheels |
558.5 | Caps and covers |
559 | Rocker arms |
560 | Pedals |
564 | Foot rests |
565 | Controller checks |
566 | Slot closers and lever guards |
ELEMENTS |
567 | Cams |
572.4 | Balancing for drum, e.g., washing machine or arm-type structure, etc., centrifuge, etc. |
570.1 | Eccentric |
570.2 | Plural, movable relative to each other (including ball(s)) |
571.1 | Adjustable |
570.3 | Having anti-friction means, e.g., roller bearing, lubrication, etc. |
572.1 | Power generating-type flywheel |
572.2 | Flywheel, motion smoothing-type |
573.1 | With fluid balancing means |
574.1 | With electrical or magnetic damping |
574.2 | Damping using swinging masses, e.g., pendulum type, etc. |
574.3 | Damping by increasing frictional force |
574.4 | Damping by absorbing vibration force (via rubber, elastomeric material, etc.) |
572.21 | Structural detail, e.g., fiber, held by magnet, etc. |
575 | Pawls and ratchets |
579R | Pitmans and connecting rods |
580 | Radial |
581 | Yieldable |
586 | Longitudinally adjustable |
587 | Hollow rod, lubricated |
588 | Sheet metal type |
589 | Counterbalanced |
593 | Section coupled |
594 | Bearings, adjustable |
579E | Engine type |
579F | Idler arm |
594.1 | Cranks and pedals |
595 | Cranks and wrist pins |
596 | Multiple throw |
598 | Sectional |
599 | Yieldable |
600 | Adjustable |
602 | Variable |
603 | Counterbalanced |
605 | Lubricated |
606R | Gear casings |
608 | Guards |
612 | Guard mechanisms |
CROSS-REFERENCE ART COLLECTIONS | ||
900 | PARTICULAR SHIFT PATTERN |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
FOR100 | TRANSMISSION CONTROL (74/473 R) |
FOR101 | Foot operated (74/474) |
FOR102 | With detent mechanism (74/475) |
FOR103 | With reverse lockout (74/476) |
FOR104 | With interlocked elements (74/477) |
FOR105 | Pivot mounting (74/473 P) |
FOR106 | Near steering wheel (74/473 SW) |
DIGESTS | ||
DIG1 | HYDRAULIC CONTROL SYSTEMS AUTOMATIC AUTOMOTIVE CONTROLS |
DIG2 | MISCELLANEOUS CONTROL SYSTEMS (E.G., SHIP PROPULSION, MACHINE TOOLS, ETC.) |
DIG3 | MOVABLE VAN OR BLADE TORQUE CONVERTERS |
DIG4 | MAGNETIC GEARING |
DIG5 | GAS TURBINE WITH GEARING |
DIG6 | TRANSISTOR-ELECTRONIC GEARING CONTROLS |
DIG7 | INDICATORS-SENSORS AND METERS |
DIG8 | MARINE CONTROL-SHIP TRANSMISSION CONTROL MEANS |
DIG9 | PERPETUAL MOTION GIMMICKS |
DIG10 | POLYMER DIGEST - PLASTIC GEARS |
DIG11 | CREEPER SPEED |
DIG12 | NOVIKOV GEARS |
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