VARIABLE-CAPACITY GEAR PUMP Russian patent published in 2001 - IPC

FIELD: manufacture of pumps; hydraulic drives of machine infinitely variable gear box. SUBSTANCE: proposed pump has shaft with drive gear revolving in sliding bearings, supporting shaft with driven gear, slide block control by rod and gear holders mounted for change of gear contact length. Pump is provided with plungers. Slide block is provided with plunger chambers with holes. Teeth of upper gear holder have longitudinal holes; lower gear has slots for change of gear contact length in matching slots in gears and holes in holder teeth with holes in slide block. EFFECT: increased rate of adjustment of pump; enhanced efficiency. 4 dwg