Device for increasing diameter of a pulley

Device for tensioning a chain

Device for the automatic regulation of the tension of a crenella

Device for use in mechanical power transmission system

Diaphragm engagement means for expansible pulley

Ditcher

Double flexing chain

Drill drive mechanism

Drive assemblies for mining apparatus

Drive assembly

Drive assembly for the rotor of a solvent extractor

Drive belt

Drive belt

Drive belt loading system

Drive belt with connector

Drive belting and drive belts manufactured therefrom

Drive chain having a disengaging link

Drive chain with slack take-up springs

Drive clutch for the V-belt type automatic transmission

Drive for a bicycle