Systems and devices to control rotational and/or arcuate motion are provided herein. In some examples, a hinge system is configured to replace a conventional door hinge and to control motion of the door. In some examples, a hinge system is configured to replace a conventional door hinge and to control motion of the door by employing a shear thickening fluid. In some examples, a door closure system is configured to replace a conventional door hinge and to control motion of the door by employing two opposing springs.

Systems and devices to control rotational and/or arcuate motion are provided herein. In some examples, a hinge system is configured to replace a conventional door hinge and to control motion of the door. In some examples, a hinge system is configured to replace a conventional door hinge and to control motion of the door by employing a shear thickening fluid. In some examples, a door closure system is configured to replace a conventional door hinge and to control motion of the door by employing two opposing springs.

A hinge for the controlled rotatable movement of a closing element anchored to a stationary support structure includes a pivot, a hinge body and a hydraulic damping cylinder. The pivot has a first axis and includes a cam, and the hinge body is engaged to the pivot so as to be rotatably coupled to each other around the first axis. The hydraulic damping cylinder includes a jacket and a plunger element, and the jacket defines a second axis, houses a working fluid and is divided into a first and a second variable volume compartment in fluid communication with each other. The plunger has a first and a second end respectively inserted into the first and second variable volume compartment to slide sealingly in the jacket. The hinge body includes a working chamber defining a third axis that is substantially perpendicular to the first axis and contains an elastic counteracting member.

Certain embodiments relate to an adjustment indicator mechanism for a door closer including a tubular portion and an adjustment screw mounted to the tubular portion. A housing is configured for mounting to the door closer, and includes a channel and indicia adjacent the channel, each of the indicia corresponding to a respective size of the door closer. An adjustment transmission includes a first component configured for coupling with the adjustment screw. An indicator transmission is engaged with the adjustment transmission and mounted in the housing. An indicator is movably mounted to the housing such that a portion of the indicator is visible via the channel. The indicator is engaged with the indicator transmission such that movement of the indicator transmission causes the indicator to selectively align with the indicia to thereby indicate the current size of the door closer.

A positionable hidden hydraulic hinge configured for installation of a door is provided. The positionable hidden hydraulic hinge includes a non-movable device body configured to be connectable with a door frame, a rotatable device body configured to be connectable with a door leaf, and a hinge configured to connect the non-movable device body and the rotatable device body. The rotatable device body includes a bearing guiding base having a guiding groove and a hydraulic chamber body. The positionable hidden hydraulic hinge also includes a linkage assembly configured to penetrate throughout the hinge. Two ends of the linkage assembly are configured to pivotably connect with the non-movable device body and an internal mechanism of the rotatable device body, respectively. A first end of the bearing guiding base is fixedly connected with the hinge, and a second end of the bearing guiding base is connected with the hydraulic chamber body.

A method for controlling a door, comprising the steps of storing energy during a manual opening of a door, sensing an object within a doorway, selectively applying a force derived from the stored energy, to close the door, based on the sensing of an object in the doorway. The closure is preferably controlled by an electronic control. A door closing device comprising an energy storage device for storing energy during door opening and releasing the stored energy to subsequently close the door, a damping system for damping a closure of the door, a sensor for detecting an object within a doorway, having an output, a controllable device for selectively restraining the energy storage device from closing the door, and a control system for controlling the controllable device based on the output.

A method for controlling a door, comprising the steps of storing energy during a manual opening of a door, sensing an object within a doorway, selectively applying a force derived from the stored energy, to close the door, based on the sensing of an object in the doorway. The closure is preferably controlled by an electronic control. A door closing device comprising an energy storage device for storing energy during door opening and releasing the stored energy to subsequently close the door, a damping system for damping a closure of the door, a sensor for detecting an object within a doorway, having an output, a controllable device for selectively restraining the energy storage device from closing the door, and a control system for controlling the controllable device based on the output.

A low-bulkiness hinge for closing a closing element anchored to a stationary support structure, such as a wall, a frame or a floor includes a hinge body which includes a longitudinal operating chamber defining a first axis, a pivot coupled to the hinge body to rotate around a second axis between the opening and closing positions of the closing element, and a slider slidable in the operating chamber along the first axis. The operating chamber has a first seat for the pivot and a second seat for the sliding of the slider, which includes a shaft and an operative head that are mutually coupled. The hinge body has a first opening for inserting, perpendicularly to the first axis, the operative head into the second seat and a second through opening for inserting, coaxially to the first axis, the shaft into the housing. The hinge further has the shaft and the operative head fixed to one another after insertion in the second seat (so as to form a unitary assembly integrally slidable along the first axis.

An exemplary door operator comprises a body, a hydraulic regulation valve, and a visual indicator mechanism. The hydraulic regulation valve is mounted to the body and is operable to adjust an operating characteristic of the door operator. The hydraulic regulation valve includes an adjustment screw having a variable screw position. The visual indicator mechanism is engaged with the hydraulic regulation valve, and is configured provide a visual indication relating to a level of regulation provided by the hydraulic regulation valve. The visual indication varies according to the variable screw position.

An exemplary door operator comprises a body, a hydraulic regulation valve, and a visual indicator mechanism. The hydraulic regulation valve is mounted to the body and is operable to adjust an operating characteristic of the door operator. The hydraulic regulation valve includes an adjustment screw having a variable screw position. The visual indicator mechanism is engaged with the hydraulic regulation valve, and is configured provide a visual indication relating to a level of regulation provided by the hydraulic regulation valve. The visual indication varies according to the variable screw position.