Automatic door stopping-closing device and door
AssigneeCmech (Guangzhou) Ltd.
InventorJia Sen Qiu
Life of this patent
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Abstract
An automatic door stopping-closing device comprises a cylinder with a connecting rod, one end of which is connected to a door; a bracket assembly on the door frame, comprising a hook connected with the other end of the rod, a movable lug cooperated with the hook, and a pull rod cooperated with the movable lug, wherein the pull rod and the hook can be engaged or disengaged. After the door is opened, the door can be kept open securely through the cooperation between the hook and the movable lug; and the door can be closed automatically by a slight push, through the cooperation between two of the hook, the movable lug and the pull rod. The automatic door stopping-closing device holds the door open without external force after the door is opened, and closes the door automatically after a slight push.
Claims13
A door closer device for controlling closing of a door mounted in a door frame, comprising:
- a cylinder pivotally mounted to the door;
- a bracket fixed to the door frame;
- a rod with a first end in the cylinder and a second end pivotally connected to the bracket, and the connecting rod being extendable and retractable relative to the cylinder;
- a lug pivotally mounted in the bracket for rotation between a first position engaging the rod to hold the door open and a second position disengaged from the rod to allow the door to close;
- the lug being biased to the first position when the door is closed and being rotatable in opposite directions from the first position;
- and
- the lug is in the first position when the door is closed and when the door is held open.
A method of controlling positions of a hinged door, comprising:
- extending a rod of a cylinder mounted to the door as the door opens;
- then
- engaging a lug in a bracket on a frame surrounding the door with an end of the extended rod to hold the door open at a first distance without external force;
- opening the door a further distance so as to disengage the rod from the lug;
- upon release of the door from the further distance, retracting the rod to close the door;
- wherein the lug rotates in a first direction from an initial position when the door moves towards the first distance and rotates in an opposite direction from the initial position when the door moves to the further distance;
- and
- the lug is in the initial position when the door is closed and when the door is held open.
Dependencies are inferred from the claim text.