Hydraulic hinge, in particular concealed hinge for doors

A hydraulic hinge comprising:

• a fixed element adapted to be anchored to a stationary support structure;
• a movable element adapted to be anchored to a closing element,
• wherein the fixed element and the movable element are mutually coupled to reciprocally rotate about a first longitudinal axis between an open position and a closed position,
• wherein one of the fixed element and the movable element includes a hinge body and a working chamber which defines a second longitudinal axis, the working chamber including a plunger member adapted to slide along the second axis and a working fluid for hydraulically damping the movement of the movable element, the plunger member being mutually connected with the other of the fixed element and the movable element so that the rotation of the movable element corresponds to the sliding of the plunger member and vice-versa,
• wherein the plunger member comprises a cylindrical body connected with a pair of end members to define a pair of valve seats, the plunger member further comprising a pair of non-return valve control members each sliding within the respective valve seat to control the flow of the working fluid,
• wherein the plunger member is adapted to divide the working chamber in a first variable volume compartment, a second variable volume compartment and a third variable volume compartment fluidically communicating with each other, the third variable volume compartment being interposed between the first variable volume compartment and the second variable volume compartment, the third variable volume compartment being placed between the end members of the plunger member,
• wherein the hinge body includes a first channel having a first opening in the third variable volume compartment and a second opening in the first variable volume compartment, a second channel comprising a third opening in the third variable volume compartment and a fourth opening in the second variable volume compartment and a third channel including a plurality of fifth openings in the third variable volume compartment and a sixth opening in the second variable volume compartment,
• wherein the non-return valve control members act in opposite directions in such a manner that upon one of the opening or closing of the closing element one of the non-return valve control members opens and the other of the control members closes, and in such a manner that upon the other of the opening or closing of the closing element, one of the control members closes and the other of the control members opens, so that the working fluid selectively flows through only one thereof during both opening and closing of the closing element,
• wherein the hinge body further comprises a first adjustment element, a second adjustment element and a third adjustment element having a respective first, second and third operative end at the respective first, second and third channel and a respective first, second and third control end adapted to be operated by an operator,
• wherein the second opening is fluidically decoupled from the plunger member for the entire stroke thereof, the first adjustment element adjusting the opening or closing speed of the movable element, the fourth opening being fluidically coupled with the plunger member for a first part of the stroke thereof and fluidically decoupled from the plunger member for a second part thereof, the second adjustment element adjusting a latch action of the movable element towards the open or closed position, and
• wherein the third operative end is adapted to selectively obstruct one or more of the fifth openings to hydraulically limit the opening or closing angle of the closing element.

A concealed hydraulic hinge comprising:

• a fixed hinge body adapted to be anchored to a stationary support structure;
• a movable hinge body adapted to be anchored to a closing element;
• and
• a connecting assembly for mutual connection of the fixed hinge body and movable hinge body to reciprocally rotate about a first longitudinal axis between an open position and a closed position,
• wherein one of the fixed hinge body or the movable hinge body includes a tubular element adapted to be concealedly inserted within one of the closing element and the stationary support structure, the one of the fixed hinge body or the movable hinge body including a first box-shaped element susceptible to internally contain the connecting assembly in the closed position of the closing element, the connecting assembly protruding from the first box-shaped element in the open position of the closing element,
• wherein the tubular element includes a working chamber which defines a second longitudinal axis perpendicular to the first axis, the working chamber including a plunger member adapted to slide along the second axis and a working fluid for hydraulically damping the movement of the movable element, the plunger member being mutually connected with the other of the fixed element and the movable element so that the rotation of the movable element corresponds to the sliding of the plunger member and vice-versa,
• wherein the plunger member comprises a cylindrical body connected with a pair of end members to define a pair of valve seats, the plunger member further comprising a pair of non-return valve control members each sliding within a respective valve seat to control the flow of the working fluid,
• wherein the plunger member is adapted to divide the working chamber into a first variable volume compartment, a second variable volume compartment and a third variable volume compartment fluidically communicating with each other, the third variable volume compartment being interposed between the first variable volume compartment and the second variable volume compartment, the third variable volume compartment being placed between the end members of the plunger member, the hinge body including a channel having a first opening in the third variable volume compartment and a second opening in one of the first compartment or the second compartment, and
• wherein the non-return valve control members act in opposite directions in such a manner that upon one of the opening or closing of the closing element one of the non-return valve control members opens and the other of the non-return valve control members closes, and in such a manner that upon the other of the opening or closing of the closing element the one of the non-return valve control members closes and the other of the non-return valve control members opens, so that the working fluid selectively flows through only one thereof during both opening and closing of the closing element.