US PATENT SUBCLASS 474 / 152
POSITIVE DRIVE PULLEY OR GUIDE ROLL

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

152POSITIVE DRIVE PULLEY OR GUIDE ROLL {6}
153  DF  .~> With particular belt {2}
158  DF  .~> And additional coaxial surface for engaging same belt in shifted condition or for engaging auxiliary belt, brake, or clutch member {2}
161  DF  .~> Having nonmetallic component
162  DF  .~> Having belt-engaging surfaces on discrete circumferentially spaced, relatively movable or replaceable members {1}
164  DF  .~> Having axially spaced sets of belt-engaging surfaces
165  DF  .~> With stationary support for pulley or guide roll

DEFINITION

Classification: 474/152

POSITIVE DRIVE PULLEY OR GUIDE ROLL:

(under the class definition) Subject matter wherein a pulley or guide roll structure include a belt*-engaging drive face

formed by circumferentially spaced, radially extending teeth or ridges intended for driving engagement with radially extending surfaces correspondingly spaced along the length of a belt.

SEE OR SEARCH CLASS

30, Cutlery,

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

198, Conveyors: Power-Driven,

834, for a positive drive pulley for a conveyor.

226, Advancing Material of Indeterminate Length, 52+, and particularly subclasses 76+ for a rotating sprocket wheel to advance material. [figure]