Door closers originated from a patent registered by an American in the early 20th century. Their function is to control the closing process, protect the door frame and door body, and have become an important component of modern intelligent building management.
Door closers, especially modern hydraulic door closers, can be traced back to the early 20th century. At that time, an American registered a patent for a door closer, marking the birth of the hydraulic door closer. Compared to traditional door closers, hydraulic door closers achieve a buffering effect by throttling the fluid within the closer. This innovative design greatly improves the closing experience, reducing noise and impact.