US PATENT SUBCLASS 474 / 166
FRICTION DRIVE PULLEY OR GUIDE ROLL

Current as of: June, 1999
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474 /   HD   ENDLESS BELT POWER TRANSMISSION SYSTEMS OR COMPONENTS

166FRICTION DRIVE PULLEY OR GUIDE ROLL {11}
167  DF  .~> With particular belt
168  DF  .~> Including plural, coaxial, circumferential belt-receiving grooves {2}
171  DF  .~> And additional coaxial surface for engaging same belt in shifted condition or for engaging auxiliary belt, brake, or clutch member
172  DF  .~> Guide roll on axis perpendicular to top surface of belt for engaging side of belt {1}
174  DF  .~> Pulley or guide roll including circumferential belt-receiving groove {4}
184  DF  .~> Pulley or guide roll having plural, discrete belt-engaging faces for engaging flat belt {2}
188  DF  .~> Including grooves or openings in cylindrical belt-engaging surface (e.g., for escape of air, etc.) {1}
190  DF  .~> Including nonmetallic belt-engaging surface portion {3}
195  DF  .~> With spokes connecting rim to hub {1}
197  DF  .~> Cylindrical rim interconnected to axially spaced support members
198  DF  .~> With stationary support for pulley or guide roll {1}

DEFINITION

Classification: 474/166

FRICTION DRIVE PULLEY OR GUIDE ROLL:

(under the class definition) Subject matter wherein pulley* or guide roll* structure includes a drive surface or drive surfaces for driving engagement with a belt* by frictional contact with the belt.

SEE OR SEARCH CLASS

16, Miscellaneous Hardware,

210+, for a sash cord guide.

30, Cutlery,

384+, for a guide pulley in a chain saw.

191, Electricity: Transmission to Vehicles, 63+, for a trolley wheel head mounted for rolling contact with a conductor.

198, Conveyors: Power-Driven,

835, and 842+ for a friction drive pulley or guide roll for a conveyor belt.

226, Advancing Material of Indeterminate Length,

168+, for orbitally traveling material-engaging surface to advance material.

242, Winding, Tensioning, or Guiding,

600+, and 118+ for a winding drum or spool.

254, Implements or Apparatus for Applying a Pushing or Pulling Force,

264+, for a driving device which contacts and pulls on a cable; and subclasses 389+ for a device or member for contacting and guiding a moving cable.

492, Roll or Roller, for a roll, per se, not elsewhere provided for, and see the search notes thereunder. [figure]