Closing rod with progressive opening. (Machine-translation by Google Translate, not legally binding)

摘要

Progressive opening rod closure, comprising a valve rod; a retaining ring fixed on said valve rod; a sealing washer mounted on the front end of said valve rod; a connection device attached to the front end of the valve rod; and two elastic elements respectively installed between the valve rod and the retaining ring and between the sealing washer and the connection device; characterized in that at the front end of the valve rod there is a conical rod, at the front of the conical area there is a C-shaped ring, said conical rod serving to gradually open or close said sealing washer. (Machine-translation by Google Translate, not legally binding)