SHIPBOARD HYDRAULIC DRIVE Russian patent published in 2007 - IPC B63B19/14 F15B15/16 B66F9/00 

FIELD: positive-displacement hydraulic drives.

SUBSTANCE: proposed hydraulic drive has common hydraulic power supply system, hydraulic distributor, double-acting hydraulic cylinder connected to it and interlocking valve whose inlet is connected with one of working chambers of hydraulic cylinder and outlet is connected with user. Hydraulic drive is provided with bypass controllable valve made in form of hydraulic lock with piston chamber, rod chamber and valve chamber. Piston chamber is hydraulically connected in parallel with hydraulic distributor and other working chamber of hydraulic cylinder; rod chamber is connected with return line of hydraulic system and valve chamber is connected with interlocking valve outlet; it is made for parallel hydraulic connection with user. Besides that, hydraulic drive is provided with throttle valve mounted for hydraulic connection with valve chamber of bypass controllable valve and in parallel with interlocking valve outlet on side of inlet and for connection with user on side of outlet.

EFFECT: enhanced operational reliability of hydraulic drive due to avoidance of false operation of user, mast gear in particular under wave loading condition.

2 cl, 1 dwg