Abstract: A fast-fit coupling for a fluid circulation system comprising at least two conveying members of a fluid. The coupling comprises: a receiving body for each conveying member; way for fastening carried by the body, shiftable by the conveying member during the insertion of the conveying member, and integral with the conveying member when the conveying member is moved in a disconnection direction from the body; way for locking cooperating with the way for fastening to lock the conveying member in a position inside the body and to prevent the body itself from being disconnected; and way for releasable constraint, activatable for restraining the way for locking to the body and preventing the conveying member to be disconnected, and deactivatable to disconnect the way for locking and allowing the conveying member to be disconnected; the way for locking and the body are engageable/disengageable by ways of a relative rotation less than ninety degrees.

Abstract: A fast-fit coupling for a fluid circulation system comprising at least two conveying members of a fluid is described; the coupling comprises: a receiving body for each conveying member; fastening means carried by the body, shiftable by the conveying member during the insertion of the conveying member, and integral with the conveying member when the conveying member is moved in a disconnection direction from the body; locking means cooperating with the fastening means to lock the conveying member in a position inside the body and to prevent the body itself from being disconnected; and releasable constraint means, activatable for restraining the locking means to the body and preventing the conveying member to be disconnected, and deactivatable to disconnect the locking means and allowing the conveying member to be disconnected; the locking means and the body are engageable/disengageable by means of a relative rotation less than ninety degrees.

Abstract: There is described a valve assembly having a casing defining a cavity for passage of a fluid; and a valve housed in the cavity; the valve has first sealing means cooperating with the casing to divide the cavity into a first and a second environment; at least one opening permitting flow of the fluid between the first and second environment; and second sealing means varying in configuration to permit/prevent communication between the first and second environment through the opening; and the second sealing means also cooperate with the casing, on the side facing the second environment, to prevent the first and second environment from communicating fluidically through the opening.

Abstract: An ON/OFF valve (1,1?,1?) that has an outer body (3) defining a fluid flow cavity (2) divided by an intermediate surface (8, 21) into a first and a second chamber (2a, 2b) communicating with each other via an opening section (6, 28) in the intermediate surface (8, 21). A flexible shutter (7) has on the side facing the first chamber (2a), a membrane portion (17) that cooperates elastically, by virtue of a fluid pressure, with the intermediate surface (8, 21) and with the opening section (6, 28) to separate the first and second chamber (2a, 2b) hermetica1ly. Fluid leakage generating members (20, 27) are located between the membrane portion (17) of the shutter (7) and the opening section (6, 28), and are active when the pressure in the first chamber (2a) exceeds the pressure in the second chamber (2b) by an amount equal to or less than a threshold value (P) other than zero.

Abstract: A gripping member for a fast-fit safety coupling, having a tubular main body connectable to a first pipe; a slide valve member fitted to slide axially inside the main body, and maintained by a spring in a closed position separating the first pipe in fluidtight manner from the surrounding environment; releasable primary connecting means defining a forward coupled position of an endpiece of a second pipe inside the main body, to connect the first and second pipe hydraulically; and releasable secondary connecting means for retaining the endpiece, upon release of the primary connecting means, in a withdrawn safety position in which the endpiece is connected mechanically to the main body, and the valve member is in the closed position permitting leakage of the work fluid; the secondary connecting means include releasable retaining means which cooperate with the endpiece to prevent it from being detached from the main body, are controlled by the pressure of the work fluid inside the main body, and are disabled by t

Abstract: There is described an ON/OFF valve (1, 1′, 1″) having an outer body (3) defining a fluid flow cavity (2) divided by an intermediate surface (8, 21) into a first and a second chamber (2a, 2b) communicating with each other via an opening section (6, 28) in the intermediate surface (8, 21); a flexible shutter (7) having, on the side facing the first chamber (2a), a membrane portion (17) co-operating elastically, by virtue of a fluid pressure, with the intermediate surface (8, 21) and with the opening section (6, 28) to separate the first and second chamber (2a, 2b) hermetically; and fluid leakage generating means (20, 27) located between the membrane portion (17) of the shutter (7) and the opening section (6, 28), and which are active when the pressure in the first chamber (2a) exceeds the pressure in the second chamber (2b) by an amount equal to or less than a threshold value (P) other than zero.

Abstract: A connecting member (4) for a fast-fit safety coupling (1), having a tubular main member (10) connectable to a first conduit (2) for conducting pressurized fluid; a valve member (11) fitted inside the main member (10) to slide axially between a first work position separating the first conduit (2) in fluidtight manner from the outside, and an open second work position; first retaining means (18) for releasably connecting an endpiece (5) of a second conduit (3) to the valve member (11); second retaining means (17) for releasably connecting the valve member (11), in the second work position and connected to the endpiece (5), to the main member (10); and control means (70, 71, 72, 54) for disconnecting the connecting member (4) and the endpiece (5).

Abstract: A connecting member (4) for a fast-fit safety coupling (1), having a tubular main member (10) connectable to a first conduit (2) for conducting pressurized fluid; a valve member (11) fitted inside the main member (10) to slide axially between a first work position separating the first conduit (2) in fluidtight manner from the outside, and an open second work position; first retaining means (18) for releasably connecting an endpiece (5) of a second conduit (3) to the valve member (11); second retaining means (17) for releasably connecting the valve member (11), in the second work position and connected to the endpiece (5), to the main member (10); and control means (70, 71, 72, 54) for disconnecting the connecting member (4) and the endpiece (5).

Abstract: A connection for extensions for vehicle tire inflating valves comprises a body consisting of two portions, one of which is to be joined with the extension and the second is to be connected to the valve and ends in an appendage for actuating the valve moving element. The second portion of the body comprises a cylindrical element with a smooth side surface having, near the appendage, a radially operating sealing ring.