ALEXANDRIA, Va., July 15 -- United States Patent no. 12,662,863, issued on June 23, was assigned to SUN-Q DOOR CONTROLS Ltd. (Yuanlin City, Taiwan).
"Cam hydraulic door closer for narrow frame door" was invented by Tsung-Ching Chen (Yuanlin City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention belongs to the technical field of door closers, and particularly relates to a cam hydraulic door closer for a narrow frame door, which uses an embedded design, wherein a door closer main body and horizontal and vertical fasteners are fixed in a door body in an embedded installation manner. The door closer main body is positionally limited and fixed in the horizontal direction by the horizont...