360-DEGREE ROTATIONAL CAM HYDRAULIC DOOR CLOSER FOR NARROW FRAME DOOR

Abstract: the present invention relates to a 360-degree rotational cam hydraulic door closer for a narrow frame door. the cam shaft is 360-degree rotatably supported in the door closer housing. the matching of the damping roller rotationally disposed on the bidirectional piston with left and right closing arc recesses on the outer peripheral surface of the eccentric cam keeps a closed status when the door is rotated to 0�, 180� and 360�, wherein the damping roller is embedded in the left or right closing arc recess, fixed relative to the eccentric cam, achieving door angle fixing and door stopping. the cam shaft receives the damping effect generated from the damping roller to the eccentric cam, that lowers the transient door opening and closing speed, achieving sufficient buffering. the open angle of 0�-360� is realized, which meets revolving doors' requirement, facilitating the door to be opened to both sides.

Inventor(s): Tsung-Ching CHEN

CPC Classification: E05F3/104 (DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING)

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