Patent ID: 8763204

Claim:
A shock absorbing damper for a sliding door, for absorbing a shock occurring when the sliding door mounted to a door frame collides with the door frame, the shock absorbing damper comprising: a cylinder including a pressure chamber filled with an attenuating medium; a piston which is slidable in the cylinder and pressurizes the attenuating medium in the cylinder; a spring for biasing the piston in a direction opposite to a pressurizing direction of the attenuating medium by the piston; a cam which is engageable with a pin mounted to the sliding door; and a rod having one end connected to the cam and the other end inserted into the cylinder, wherein the rod comes into contact with the piston when the rod is pushed into the cylinder as the sliding door moves in an opening direction or a closing direction whereas the rod is separated from the piston when the rod is pulled out of the cylinder as the sliding door moves in the closing direction or the opening direction, a through hole, which is a pressure release hole, is formed in the piston at a central portion thereof, along a central axis of the piston, and the rod closes the pressure release hole when the rod comes in contact with the piston to prevent the attenuating medium from passing through the pressure release hole.