US Patent 9320929 Protective cap of sprinkler head and sprinkler head

A protective cap for a sprinkler head and a sprinkler head provided with the protective cap, in which the protective cap for a sprinkler head has a cylindrical shape that is capable of accommodating a sprinkler head therein, the protective cap having an opening on an upper side thereof and a base provided on a lower side thereof, a base side of the protective cap having a drain hole therein, a seat portion on which a surface of the sprinkler head sits being provided inside the protective cap on the base side, in which the seat portion is disposed on an opening side with respect to the drain hole.