HYDRAULIC SERVO Russian patent published in 2005 - IPC

FIELD: transport engineering.

SUBSTANCE: invention relates to hydraulic control drives of tractors, load-lifting and road-building machines and automobiles. In proposed hydraulic servo containing case with pressure and drain spaces, controlled mechanism, piston with drain channel, control element with rod is made in form of valve whose spring-loaded shutoff member is installed in rod bore communicating with pressure space. Rod is coupled with piston for limited relative axial displacement owing to space made in piston end face and enclosing part of rod. Pin is radially secured in side wall of space. Free end of pin gets for displacement into closed longitudinal slot made on side surface of rod. Tubular stop of valve shutoff member is installed in piston drain channel. Stop is enclosed by compression spring installed between end face of rod and end face of piston space enclosing part of rod.

EFFECT: improved reliability in operation, simplified design.

4 cl, 1 dwg