CPC Subgroup
F02B 39/12 Drives characterised by use of couplings or clutches therein (using fluid slip couplings for varying gear ratio F02B39/08)
Full Title
Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 > Drives of pumps (exhaust drives or combined exhaust and other drives F02B37/00); Varying pump drive gear ratio > Drives characterised by use of couplings or clutches therein (using fluid slip couplings for varying gear ratio F02B39/08)