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| Class 474 | ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS |
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![[List of Pre Grant Publications for class 474 subclass 1]](../as.gif) | ![[List of Patents for class 474 subclass 1]](../ps.gif) | 1 | CONTROL FOR FORWARD AND REVERSE |
| | 2 |  Cyclical or sequential (e.g., machine controlled, etc.) |
| | 4 | Including separate belts for forward and reverse |
| | 7 | Including coaxial pulleys rotated in opposite directions by single endless belt simultaneously engaging both pulleys |
| | 8 | PULLEY WITH BELT-RECEIVING GROOVE FORMED BY DRIVE FACES ON RELATIVELY AXIALLY MOVABLE COAXIAL CONFRONTING MEMBERS (E.G., EXPANSIBLE CONE PULLEY, ETC.) |
| | 9 | Members are gripping jaws actuated during each rotation of pulley |
| | 11 | Speed responsive |
| | 17 | Load responsive |
| | 22 | Temperature responsive |
| | 23 | Adjusted by power from pulley drive train |
| | 24 | And member has plural, relatively axially movable drive faces |
| | 25 | And pulley shiftable laterally of its axis of rotation |
| | 28 | Fluid pressure actuator for adjustment of member |
| | 29 | Including actuator interconnecting plural pulleys on spaced shafts for simultaneous adjustment |
| | 32 | Plural members forming plural belt-receiving grooves on common axis |
| | 37 | By manual actuator for one or both confronting members |
| | 43 | Including lubrication or particular guide or bearing for movable member |
| | 46 | With spring device |
| | 47 | PULLEY WITH EXPANSIBLE RIM MEANS OR PULLEYS WITH ALTERNATELY USEABLE NESTABLE RIMS |
| | 48 | Nestable rims of diverse kind (e.g., one grooved and the other cylindrical, etc.) |
| | 49 | Structure for variably adjusting radius of rim section |
| | 50 |  By actuator responsive to speed or load |
| | 51 | By fluid pressure actuator or inflatable rim |
| | 52 | Including means interconnecting plural pulleys for simultaneous adjustment |
| | 54 | By actuator having collar concentric with, and movable axially on, pulley axis |
| | 56 | By actuator having collar concentric with, and rotatable in plane perpendicular to pulley axis |
| | 58 | POWER OUTPUT PULLEY SELECTIVELY SHIFTABLE TO DIFFERENT POWER OUTPUT LOCATIONS RELATIVE TO INPUT PULLEY |
| | 61 | POWER INPUT AND OUTPUT PULLEYS ON NONPARALLEL AXES |
| | 64 | PLURAL TURNS OF SAME BELT ABOUT PULLEY AXIS |
| | 65 | With flexible belt-tracking guide helically coiled about pulley |
| | 66 | Plural turns of same belt about axis of each of laterally spaced pulleys |
| | 69 | CONTROL FOR VARIABLE INPUT TO OUTPUT SPEED-RATIO |
| | 70 | Condition responsive (e.g., responsive to speed, load, etc.) |
| | 71 | Cyclical or sequential (e.g., machine controlled, etc.) |
| | 72 | Including intermeshing gears in one drive train |
| | 73 | Including separate belt on each of coaxial pulleys selectively engaged in drive train |
| | 74 | With overrunning clutch |
| | 75 | Selection by tightening belt on selected pulley |
| | 76 | Selection by axially movable pin engaged in opening through selected pulley |
| | 77 | Including coaxial pulleys shiftable axially to align selected pulley with drive belt |
| | 78 | Including belt shiftable axially from one to another surface of stepped pulley or coaxial pulleys of different diameter |
| | 83 | Including mechanism for shifting belt axially on spaced pulleys with tapering drive face |
| | 84 | PLURAL BELTS OR PLURAL OUTPUT LOADS |
| | 85 | Plural belts having interengaged drive surfaces |
| | 86 | Plural output loads |
| | 88 | Plural belts in series via countershaft |
| | 90 | STATIC ELECTRICITY ELIMINATOR |
| | 91 | STRUCTURE FACILITATING LUBRICATION OF BELT, PULLEY, OR GUIDE ROLL |
| | 92 | CLEANING DEVICE FOR BELT, PULLEY, OR GUIDE ROLL |
| | 93 | FLUID-IMPELLING MEANS (E.G., FOR COOLING, ETC.) |
| | 94 | RESILIENT CONNECTION BETWEEN PULLEY OR GUIDE-ROLL RIM AND MOUNT |
| | 95 | HUB FORMED IN SECTIONS AND SEPARABLE BY MOVING SECTIONS RADIALLY APART (E.G., SPLIT PULLEY TO FACILITATE INSTALLATION, ETC.) |
| | 100 | AUXILIARY ENDLESS BAND FOR GUIDING BELT OR HOLDING BELT ENGAGED WITH PULLEY |
| | 101 | MEANS FOR ADJUSTING BELT TENSION OR FOR SHIFTING BELT, PULLEY OR GUIDE ROLL |
| | 102 | With sensor for controlling operation of shifter to correct belt training deviation |
| | 103 | Shifter driven by electrical or fluid motor |
| | 105 | Sensor actuates pawl-and-rachet mechanism to operate shifter |
| | 106 | Sensor includes rotatable belt-engaging surface |
| | 109 | Load responsive tension adjuster or shifter |
| | 110 | Tension adjuster or shifter driven by electrical or fluid motor |
| | 111 | Tension adjuster has surface in sliding contact with belt |
| | 112 | Pulley or guide roll has eccentric mount for shifting or tensioning movement |
| | 113 | Pulley shifter |
