Patent attributes
A damper valve includes first and second chambers separated by a partition wall, hydraulic oil flowing from the first chamber to the second chamber via a supply path, and returning to the first chamber from the second chamber via a return path. A valve plate that is elastically deformable is urged toward a valve seat formed in the return path. The valve plate produces an elasticity restoring force so as to establish a balance between an urging force provided by an urging member and a reaction force provided by the valve plate, and is in line-contact with the valve seat when keeping the balance. The valve seat or the valve plate is formed into a conical tapered shape centered around the predetermined axis so that when the valve plate is abutted against the valve seat, an annular oil chamber is formed between the valve seat and the valve plate.
