Patent attributes
A valve includes a valve disc that partitions one chamber and another chamber. The valve disc includes annular bosses and seats at each of the one chamber side and the other chamber side, and an auxiliary seat at the other chamber side. The boss is formed to support leaf valves. The seats are formed on outer peripheral sides of the respective bosses. At least one of the seats is disposed to project with respect to the boss of the corresponding chamber side. An outer peripheral end of the seat on the one chamber side is disposed on an outer peripheral side with respect to an outer peripheral end of the seat on the other chamber side. The auxiliary seat is formed on an outer peripheral side of the seat, and have a height equal to or greater than that of the seat on the other chamber side.
