Hydraulic jack with locking

Hydraulic jack (1) that comprises a main body (12) and a lifting arm (2), the lifting arm (2) being articulated in relation to the main body (12) and operated hydraulically, the lifting arm (2) comprising a pusher end (3) designed to be raised while pushing a vehicle in an ascending direction, characterised in that:

• the hydraulic jack (1) comprises a lever member (5) that may rotate in relation to the main body (12) in a locking direction (B) or in an unlocking direction (A) and which is operated by a spring (13) in the locking direction (B), where the lever member (5) presents an operable area (7) on one end to allow it to be rotated in the unlocking direction (A) and a first curved area (10) and a second curved area (11) on the other end, both of them separated by a step (8), where
• the lifting arm (2) comprises a rotating stop member (9) capable of to rolling along the first curved area (10) or the second curved area (11) when the lifting arm (2) rotates, and which lodges itself in the step (8) in order to lock the lifting arm (2) and prevent it from rotating in a descending direction.