A pneumatic door closer includes a rotary energy-storing mechanism including a housing and a driving mechanism. The driving mechanism includes a cylinder, a second piston assembly and a sealing element, the sealing element is in an air tight connection with the cylinder and the second piston assembly, to form a closed space filled with high pressure gas in the cylinder. The second piston assembly drives the closed space into a first air chamber and a second air chamber in communication with each other. The driving mechanism also includes a first piston assembly connected to the second piston assembly. The pneumatic door closer also includes a transmission mechanism having one end received in the housing and another end connected to the door frame.

A door closer pivoted on a door at least includes a case and a piston. When the door is open, the door closer blocks a communicating hole of the case by an oil sealing ring of the piston to allow an oil filled in the door closer cannot flow through the communicating hole. As a result, the open door can be held in a predetermined position.

A hinge for cold rooms or glass shutters, coupling a stationary support structure and a shutter movable between an open position and a shutter position, includes a hinge body having a working chamber; a pivot defining a first longitudinal axis coupled to the hinge body to rotate around the first axis between the open and the closed shutter position; a cam element integral with the pivot; a plunger element sliding in the working chamber along a second axis substantially perpendicular to the first axis, the plunger element having a slider with an operative face interacting with the cam element; and an elastic counteracting member acting upon the plunger element to move it along the second axis between a position proximal to the bottom wall of the working chamber and a position distal therefrom. The hinge body has a substantially plate shape.

A power boost assembly is disclosed that can be used with a door actuator, such as a door closer. The power boost assembly is structured to store an energy during a first movement of a door and release the stored energy during a second movement of the door. In one form the power boost assembly can be structured as a module that can be added to an existing door and door closer installation. In one form the power boost assembly is used to increase a closing force imparted to a door to ensure a latching event.

A closing hinge including a hinge body and a pivot reciprocally coupled to rotate around a first axis; a working chamber defining a second axis perpendicular to the first axis; a cam member unitary rotating with the pivot; a cam follower wheel sliding along the second axis between a position proximal to the rear wall of the working chamber and a distal position thereto; a thrust spring acting on the cam follower wheel. The cam member includes a first abutment element and a second abutment element respectively including a second curved portion and a third curved portion for selectively contacting the cam follower wheel in a respective single tangency point at a first and a second open positions and for contacting the wheel in two tangency points opposite with respect to the second axis at a closed position.

An actuation device for a lifting system for door leaves of furniture, the actuation device comprising a fixing plate that can be connected to the body of the piece of furniture, a supporting lever for the door leaf, which is connected, so that it can oscillate, to the fixing plate at a fulcrum and comprises, at the fulcrum, a connecting portion that extends eccentrically with respect to the fulcrum, and elastic means that comprise a body for accommodating at least one elastic element.

A HYDRAULIC PIVOT FOR DOORS THAT INCLUDES A LOWER PIVOT AND A PULLEY SYSTEM THAT SPINS AT OPENING TIME AND AT CLOSING TIME, TWO SPRINGS THAT PROVIDE THE STRENGTH AND THRUST AT THE DOOR'S OPENING TIME AND AT THE DOOR'S CLOSING TIME, TWO VALVES THAT REGULATE THE CLOSING SPEED AND THE BREAK'S SPEED. A SECOND LOWER PIVOT THAT IN ITS INTERIOR COMPREHENDS A SCREW BOLT WITH A SUPERIOR HOLE, WHERE IT HOUSES AN ARROW WITH A WRENCH'S COUPLING OPENING; THE ARROW IN ITS INTERIOR HOUSES A LENGTHLY SPRING, THAT WHEN IT IS ACTIVATED VIA THE WRENCH THAT WITH A SPIN TO THE RIGHT PRESSES THE SPRING THAT IT MAKES THE SCREW BOLT GO UP OR DOWN THE SCREW BOLT TO THE NEEDED HEIGHT UNTIL IT SHEATHES IN THE TOP STRIKE. PLATE THAT ALLOWS THAT THE HYDRAULIC PIVOT PROVIDE WEIGHT SUPPORT UP TO 100 KILOGRAMS, AND PROVIDES OPENING/CLOSING DOOR CONTROL.

A pneumatic door closer includes a rotary energy-storing mechanism including a housing and a driving mechanism. The driving mechanism includes a cylinder, a second piston assembly and a sealing element, the sealing element is in an air tight connection with the cylinder and the second piston assembly, to form a closed space filled with high pressure gas in the cylinder. The second piston assembly drives the closed space into a first air chamber and a second air chamber in communication with each other. The driving mechanism also includes a first piston assembly connected to the second piston assembly. The pneumatic door closer also includes a transmission mechanism having one end received in the housing and another end connected to the door frame.

A hinge mechanism comprising first and second members rotatable relative to one another about a hinge axis from a first to a second position; and a biasing arrangement operative to adopt an active mode to bias the first and second members into at least one relative position and operative to adopt an inactive mode where the biasing arrangement does not provide bias to the first or second members to undergo relative rotation, wherein the biasing arrangement remains in the inactive mode on relative rotation of the first and second members through a first selected angular displacement between the first position and the second position, and is in the active mode on relative rotation of the first and second members through a second selected angular displacement between the first position and the second position.

A hinge having a first hinge part and a second hinge part. The second hinge part has a hinge pin to which the first hinge part is connected for movement relative to the second hinge part about a hinge axis between a closed position. An over-close mechanism is provided comprising a catch member on the second hinge part arranged to co-operate with the first hinge part to urge the first hinge part towards the closed position during closing movement of the first hinge part and to retain the first hinge part arrange to co-operate with the hinge pin to urge the first hinge part towards the closed position during closing movement. A soft-close mechanism is provided comprising a damper member on the first hinge part arranged to co-operate with the hinge pin to provide a braking force in the direction of closing.