Door closer definition
The door closer is a spring-like hydraulic device on the door. When the door is opened, it can be released by compression, and the door is automatically closed. It has the function of a spring door to ensure accurate and timely closing to the initial position after the door is opened.
Modern hydraulic door closers (referred to as door closers) began with a patent registered by Americans in the early twentieth century. Unlike traditional door closers, they are buffered by throttling the liquid in the door closer. . The core of the hydraulic door closer design idea is to realize the control of the closing process, so that the various functional indicators of the closing process can be adjusted according to the needs of the person.