Fluid-actuated clutches in which the fluid actuates a piston incorporated in, {i.e. rotating with} the clutch the clutch having friction surfaces with clutch members exclusively moving axially with conical friction surfaces, e.g. cone clutches
Fluid-actuated clutches in which the fluid actuates a piston incorporated in, {i.e. rotating with} the clutch the clutch having friction surfaces with clutch members exclusively moving axially with conical friction surfaces, e.g. cone clutches