Abstract: A polymeric device for protection of the connecting pipe coupling contains a stepped bushing having a medium part with an increased diameter and two lateral parts with a smaller outside diameters, which is installed between end faces of pipes with a conic thread, and connected by means of a coupling and having sealing rings made of an elastomer, which are on parts of the bushing with the small diameter. The device has an additional stepped bushing, and the first stepped bushing has a constant outside diameter and two parts with small and large internal diameters, and the second stepped bushing has a constant internal diameter and two parts with small and large diameters.

Abstract: A reinforcing ring and a plastic fitting incorporating such a reinforcing ring are disclosed. The reinforcing ring and plastic fitting have particular utility with respect to fire sprinkler heads in buildings. The reinforcing ring has a single starter thread which is integrally formed with a guide portion which guides a male part to be axially in line with the female fitting.

Abstract: An attachment fitting and a method for connection to a tubular duct comprising at least one ply of armors, the armors having a free end respectively defining an outer surface, the attachment fitting comprising a bushing and a sleeve having an attachment part and a connection part with a reception portion, the sleeve being mounted on the duct by spreading the free ends of the armor perpendicularly to the reception portion, the armors comprising a widening device, the bushing being mounted about the connection part and forming an annular chamber for receiving a flow of a mass-curing material for encapsulating the free ends of the armors. The widening device connected to the free outer surface of the free ends of the armors.

Abstract: An end fitting (31) is formed at the patient end of an inner cannula (3) for a tracheostomy tube (1) by punching small holes (33) close to one end (34) of an ePTFE shaft (30). The end is then swaged to form an expanded region (30?) and a preformed tubular insert (40) of a thermoplastic material is inserted to cover the holes (33) on the inside. An outer part (46) of the same thermoplastic material is then overmoulded on the outside of the shaft 30 so that its material (47) flows through the holes (33) and bonds with the inner insert (40), thereby securing the inner and outer parts together around the end of the shaft.

Abstract: A reinforcing and a plastic fitting incorporating such a reinforcing ring are disclosed. The reinforcing ring and plastic fitting have particular utility with respect to fire sprinkler heads in buildings. The reinforcing ring has a single starter thread which is integrally formed with a guide portion which guides a male part to be axially in line with the female fitting.