Patent ID: 9045926
Filing Date: 2015-06-02
Classification: E05F,E05Y,F16K,Y10T

Abstract:
1. A door closer, including at least one of a locking function and a free-swing function, comprising: a door closer housing; an output shaft configured to connect to a door; a piston assembly connected to the output shaft and guided in the door closer housing; a closer spring; a piston rod that connects the piston assembly to the closer spring; a hydraulic lock compartment configured to lock the closer spring, and a solenoid valve configured as a 3/2-solenoid control valve; a closure damping compartment arranged between the door closer housing and the piston assembly on a side of the piston assembly facing away from the piston rod; a tank compartment; a pressure line arranged from the hydraulic lock compartment and the 3/2-solenoid control valve; an operating line arranged from the closure damping compartment to the 3/2-solenoid control valve; a tank line arranged from the a tank compartment to the 3/2-solenoid control valve; and a fluid-tight separating wall arranged in the door closer housing between the piston assembly and the closer spring, wherein the piston rod passes through the separating wall in a fluid-tight manner,