PET KEG FITTING Russian patent published in 2019 - IPC B67D1/08 B67D1/12 B67C3/22 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to sealing structures for containers made from polyethylene terephthalate (hereinafter PET keg), installed on necks PET keg for dispensing, storage and transportation of beverages in PET keg under pressure. Fittings for PET keg comprises a cover with a central opening with a connection means to the keg neck, a hollow rod, a valve element, a spring, a ring nut, wherein the first end of the rod is open, and the second end is closed with the annular projection, in the forming surface of the rod there is at least one window, on the rod with possibility of movement along it a valve element is installed, central hole of which is provided with an inner annular projection configured to interact with the annular projection of the rod and an outer annular projection configured to interact with the cover annular protrusion, and between the valve element and the annular nut a spring is installed, the cover is made in the form of a fungus and is connected to the annular nut by a threaded connection for direct installation of the fitting on the keg neck, in the bottom part of the ring nut there are holes for gas passage, between collar and cylindrical surface of leg of fungus of cover there is an annular gasket for sealing connection of cover and neck PET keg, and valve element is configured to perform function of safety valve and operation indicator from polymer material with Shore hardness of 40–60 units and comprises at least one blind bore with diameter of 3–5 mm, open on the lower side, and on the upper side limited by a thin web of thickness of 0.2–1.5 mm.

EFFECT: technical result consists in obtaining a reliable, efficient and safe in operation fitting for PET keg.

5 cl, 3 dwg