HYDRAULIC JACK Russian patent published in 2017 - IPC B66F1/08 B66F3/24 B66F11/00 

FIELD: machine engineering.

SUBSTANCE: the hydraulic jack comprises a housing in which a piston with a rod is mounted, installed for engagement with a locking nut cooperating with a centrally located screw. The screw is rotatably mounted in the housing and via a tooth coupling is cinematically connected to a hydraulic motor attached to the housing. The piston with a rod and the locking nut is mounted in the housing for linear (axial) movement without possibility of rotation. In the embodiment, the screw is adapted to automatically releasable connection with the rod at the extreme retracted position of the latter.

EFFECT: expanded functionality and reliability of the jack.

2 cl, 6 dwg