HYDRAULIC AMPLIFIER Russian patent published in 2002 - IPC

FIELD: follow-up systems with multistage converters-amplifiers . SUBSTANCE: invention is designed to create hydraulic amplifier with zero setting mechanism providing dead zone depending only of design of distributing unit, and to facilitate making of screw with eccentrically mounted end piece. Proposed hydraulic amplifier has housing with working liquid inlet and outlet channels and working channel. Distributing unit installed in housing consists of sleeve and follow-up distributing spool. End faces of spool are spring-loaded. Zero setting mechanism is installed in housing square to sleeve axis. This mechanism is made in form of screw consisting of bushing thread-fitted in housing and accommodating rod with conical end piece installed with eccentricity relative to axis and loaded by spring. Rod is installed for movement with possibility of contact of end piece cone with guide slot made in sleeve. EFFECT: improved reliability of amplifier. 5 cl, 3 dwg