Abstract: A tubular glove or insert having a front ring relief at one end and at an opposite end, an external ring relief. In an internal edge of the external ring relief are located two internal ring rows of teeth. A polyhedric tool is used to form a plurality of V-shaped cuttings or notches at equal distances in the internal surfaces of the external ring relief. The cuttings are then submitted to a further cutting or milling operation to form longitudinal slots centered at a vertex of the V-shaped notches at the back extremity of the V-shaped notches near the front ring relief so that the glove can be inserted into a connection body. This process allows the manufacturing of connection gloves (inserts) with a reduction in length and consequent reduction of material used and equipment used, as well as specialized manpower, while strengthening the grasping surface of the glove on a tube.

Abstract: An external tubular body of a locking joint includes an axial cylindrical passage followed by a short radially widened section to accommodate a tube. Another further radially widened section is formed to receive a hermetically sealing O-ring. A section with a short, conically tapering surface followed by a straight section leads to an inverted conically tapering section to facilitate insertion of a glove. The glove is a tubular body with a plurality of longitudinal cuts extending to a frontal ring relief. The cuts form flexible stems, externally equipped, at an opposite extremity with a back bevelled edge ring and, internally by two rows of teeth. The teeth reduce the internal size of the glove to bite into an outer surface of an inserted tube to lock the tube within the external tubular body as the back bevelled edge ring is slid along a tapered surface of the external tubular body during withdrawal of the tube from the tubular body.

Abstract: A rotatable connector joint formed by a main joint body having an axial passage and a ring groove, followed by an axial narrowed portion with a bevelled edge, followed by another widened portion, with a supporting wall for a hermetic O-ring used during an insertion of a terminal end of a rotatable joint body into the main joint body. The rotatable joint body includes a supporting wall for the ring, followed by a hexagonal external projection. The rotatable joint body including at its other extremity, a male clamp or a female clamp, with external screw threads or internal screw threads, the latter being equipped with an axial passage and having, at the front extremity, a narrowed portion which, with the insertion of a cylindrical tool with a tapered point, expands the terminal end and accommodates it in the bevelled edge and ring groove of the main joint body, locking the rotatable joint body axially.