DOOR CLOSER

摘要

A door closer with an electric motor-assisted closing feature, that may generate its own power to assist in closing, and controls the speed of opening and closing of the door during generation is disclosed. Embodiments of the present disclosure are realized by a motorized door closer that electrically creates a latch boost force for a closing door. The door closer includes a motor disposed to operatively connect to a door so that the door will moved toward closed when the motor moves, and a position sensor to determine a position of the door. A processor is programmed to exert a closing force on the door in the latch boost region or when it otherwise detects that a motor assist is needed.

主权项

1. A door closer comprising:
an electric motor/generator configured to be operatively connected to a door movable between a closed position and an open position, the electric motor/generator having a drive shaft, wherein the drive shaft of the electric motor/generator rotates when the door moves in the direction of opening and in the direction of closing, the motor/generator being configured to apply force to move the door in the direction of closing in response to the rotation of the drive shaft of the electric motor/generator; a speed sensor for determining closing speed of the door; a timer for determining closing time of the door; an electrical energy storage element connected to the motor/generator and configured to store electrical energy generated by the electric motor/generator as the door moves in the direction of opening or closing; and a motor/generator controller connected to the speed sensor, timer and motor/generator, the controller receiving input from the speed sensor and timer and controlling operation of the electric motor/generator, the controller determining whether the door has closed within a predetermined acceptable closing time or with a predetermined acceptable closing speed, and using determined door closing time or door closing speed, determining when a motor assist is needed to complete closing of the door, and thereafter causing the electric motor/generator to be powered by electrical energy generated by the electric motor/generator and stored in the electrical energy storage element to apply force to assist the door in closing to the closed position.