VARIABLE CAPACITY PUMP Russian patent published in 2003 - IPC

FIELD: aircraft. SUBSTANCE: pump is designed for use as hydraulic energy source to supply consumers of aircraft. Proposed pump contains feed mechanism including cylinder block with pistons. Feed change mechanism includes tilted plate coupled with servopiston and pressed to stop by spring through second servopiston. Spool-type pressure regulator interacts with plunger. Electrohydraulic cock is used as control member to change pump from nominal operating conditions to operation under load. EFFECT: reduced power consumed by pump owing to reduction of pump capacity at operation under nominal pressure conditions. 2 dwg