A hinge device for a rotatable movement of a closing element between a closing position and an opening position, the closing element being anchorable to a stationary support structure, the hinge device comprising:
- a fixed element anchorable to one of the stationary support structure and the closing element;
- and
- a movable element anchorable to another one of the stationary support structure and the closing element, the fixed and the movable elements being mutually coupled so that the movable element rotates around a first longitudinal axis between an opening position and a closing position of the closing element,
- wherein one of the fixed or the movable elements includes a main body with an inner cavity having a hydraulic sealing element dividing the inner cavity into a first hydraulic working chamber and a second mechanical working chamber, and
- wherein the inner cavity further has a plunger disposed therein that is slidable along a second axis perpendicular to the first axis between a stroke-start position and an end-stroke position, the plunger comprising:
- a head sealingly inserted into the first hydraulic working chamber and dividing the hydraulic working chamber into a first and a second variable volume compartment placed in fluid communication with each other;
- and
- a stem passing through the hydraulic sealing element, the stem comprising a first portion operatively connected to the head and a second opposite portion slidable in the second mechanical working chamber,
- wherein the first hydraulic working chamber includes a working fluid and a hydraulic circuit that allows a through-flow of the working fluid between the first and the second variable volume compartment when the plunger moves between the start and the end-stroke positions,
- wherein the second mechanical working chamber includes:
- elastic counteracting means acting on the plunger;
- and
- coupling means that couple the stem and the other one of the fixed or the movable elements and comprising a connecting shaft having an end operatively coupled to the other one of the fixed or the movable element for sliding along the second axis upon rotation of the movable element,
- wherein the hydraulic circuit and the elastic counteracting means cooperate to define means for controlling a sliding of the plunger between the start and the end-stroke positions,
- wherein the coupling means are configured so that, along a first section of the sliding of the connecting shaft, the plunger does not slide to enable a free rotation of the movable element, and so that, along a second section of the sliding of the connecting shaft, the plunger slides together with the connecting shaft to control the rotation of the movable element, and
- wherein the second mechanical working chamber comprises a bottom wall facing the hydraulic sealing element, the coupling means being interposed between the hydraulic sealing element and the bottom wall, second elastic counteracting means being interposed between the hydraulic sealing element and respectively the rotating coupling element or a guide element of the coupling means.