A device for quench the two chambers of a jack, separated by a piston, while preventing that - treatment of unlocking

摘要

The unit is for sealing and preventing the unscrewing of a piston (1) screwed onto a rod (3) of a hydraulic jack. It consists of a ring (2) threaded onto the end (31) of the rod (3) which is compressed by the piston (1), screwed onto the end (31) of the rod, against the shoulder (33) of the rod (3). This causes a deformation of the ring (2) and its penetration between the shoulders of the thread (32). This has an effect in one part of preventing the passage of the fluid between the chambers (A and B), and in the other part, due to the radial load engendered between the shoulders of the thread (32) and the cut-out (11) of the piston, of strongly preventing the latter of any ill-timed release.