Sealed container esp for engine cooling water has neck with inner wall forming injection port and outer wall with threaded surface for cap

摘要

The container consists of a body (6) with a neck containing an inner cylindrical wall (30) forming an injection port (24), and an outer cylindrical wall (27) forming its filler neck. The outer wall has a threaded inner surface (32) to receive a skirt (42) with a matching thread inside a cap (7) leaving a gap through which excess pressure can be released into an outlet tube (29).