Patent ID: 8356386
Filing Date: 2013-01-22
Classification: E05F,E05Y,Y10T

Abstract:
1. A door closer comprising: a damping device including a cylindrical housing having a compartment formed in said cylindrical housing and defined by an inclined inner peripheral surface, said cylindrical housing including a first end and a second end, and including a greater inner diameter at said first end of said cylindrical housing and a smaller inner diameter at said second end of said cylindrical housing, a cap attached to said first end of said cylindrical housing and including an air perforation formed therein for allowing an air to flow through said air perforation of said cap and to flow into and out of said cylindrical housing, a piston rod slidably received and engaged in said compartment of said cylindrical housing, and including a first end extendible out of said second end of said cylindrical housing, and including a second end located and engaged in said compartment of said cylindrical housing, and a sleeve attached to said second end of said piston rod, and including an outer peripheral surface for engaging with said inner peripheral surface of said cylindrical housing, and including an outer diameter smaller than the inner diameter at said first end of said cylindrical housing and greater than the inner diameter at said second end of said cylindrical housing for allowing said outer peripheral surface of said sleeve to be engaged with said inner peripheral surface of said cylindrical housing at said second end of said cylindrical housing, but not engaged with said inner peripheral surface at said first end of said cylindrical housing.