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 connection is formed by a cylindrical body and a cylindrical orifice. The cylindrical body includes axial ring rims for the locking therein of a conical rim of an insert tube. The cylindrical body has triangular and trapezoidal annular reliefs for fitting the cylindrical body into the cylindrical orifice, under pressure, for the flow of brake fluid therethrough. The cylindrical body accepts the insertion of an O-ring and a sleeve with a grip which snap around a brake fluid tube inserted over the insert tube. The body is equipped with annular reliefs forming a groove where the conical rim of the insert tube is inserted after receiving a downward upper axial thrust from a press to allow the use of the insert tube in connections for brake systems with cartridge, compression type and threaded type fastening. The insert tube maintains a fixed, but non-rigid connection, so as not to suffer damages during the side to side insertion and withdrawal process for brake fluid tubes.

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.

Abstract: An improved method for making insert sleeves for tube fittings or quick couplings comprising forming V-shaped cut-aways in the gripping edge and inner surface of the insert sleeve then forming slots or kerfs in the sleeve, each slot or kerf being centered on and having a slightly narrower circumferential width than the cut-aways such that a chamfered corner is provided where the gripping edge or inner surface meets the slot.