Friction Drive Pulley Or Guide Roll Patents (Class 474/166)
- Groove formed by rugate or circumferentially spaced drive surfaces (Class 474/175)
- Groove formed by multiple, abutting, circumferentially connected members (Class 474/176)
- And circumferentially continuous belt-engaging layer or insert of diverse material added on or between groove-forming flanges (Class 474/177)
- Including connected discrete axially spaced groove-forming flanges (Class 474/179)