DIGITAL-ANALOG CONVERTER FOR HYDRAULIC DRIVE Russian patent published in 2001 - IPC

FIELD: hydroautomatics, possibly drive system of actuating organs of missiles and other flying objects. SUBSTANCE: converter includes housing, feedback connection rod; sleeve with axial opening and radial supplying holes; boosters whose number is equal to that of digits of binary code electric signal of converter and floating pistons mutually connected in pairs and having cut-off lands and engaging members having rod with T-shaped bead and two segment grooves forming bridge together with piston end. There is stop in axial opening of sleeve; said stop embraces rod of piston of least significant bit of code electric signal. Said piston engages with distributing gate valve of hydraulic drive. In axial opening of sleeve there are coaxial grooves whose number is equal to that of boosters; said grooves are arranged in plane of radial supplying holes of sleeve and they are hydraulically connected with segment grooves of floating pistons. Total flow-through cross section of groove in plane passing through axis of sleeve is no less than total flow-through cross section of respective radial holes. EFFECT: enhanced responsibility and quick action of hydraulic drive. 4 dwg