The quick coupling for fluid under pressure, comprising a hollow valve body, an obturator stem slidable along an axis of the valve body in contrast and by the action of elastic means configured and arranged to automatically arrange said obturator stem in a closing position of the valve body, and hydraulic sealing means between the valve body and a cylindrical terminal of the obturator stem, the hydraulic sealing means comprising at least one hollow plain bearing for reducing friction having an internal cylindrical surface mateable with the terminal of the obturator stem, and a plurality of elastic elements independent from one another configured and arranged to strain the bearing at a radial compression force for the uniform hydraulic seal against the terminal, the elastic elements being distributed at least mainly along the extension of the bearing in the direction of the axis.

The quick coupling for fluid under pressure, comprising a hollow valve body, an obturator stem slidable along an axis of the valve body in contrast and by the action of elastic means configured and arranged to automatically arrange said obturator stem in a closing position of the valve body, and hydraulic sealing means between the valve body and a cylindrical terminal of the obturator stem, the hydraulic sealing means comprising at least one hollow plain bearing for reducing friction having an internal cylindrical surface mateable with the terminal of the obturator stem, and a plurality of elastic elements independent from one another configured and arranged to strain the bearing at a radial compression force for the uniform hydraulic seal against the terminal, the elastic elements being distributed at least mainly along the extension of the bearing in the direction of the axis.

Female element for a fluid coupling and fluid coupling including such an element This fluid coupling (R) element (200) comprises a body (202) for receiving a complementary end-piece (100), this body being centered on a longitudinal axis (X2) and defining a fluid circulation channel (204) within the body on the one hand, and a sealing chamber (208) in which a sealing gasket able to cooperate with the end-piece (100) inserted in the body (202) is housed, on the other hand. The sealing chamber is defined by an outer radial wall (2082) and a rear wall (2088). This coupling element comprises a locking mechanism (206) that includes locking members (2062) radially movable in the body relative to the longitudinal axis (X2), between a position blocking the end-piece (100) in the body and a position freeing a passage for the end-piece, and a locking ring (2066) mounted around the body and movable relative thereto, between a first position keeping the locking members (2062) in their blocking position and a second position in which the locking ring does not oppose the movement of the locking members toward their released position. The sealing chamber (208) is inwardly radially defined, relative to the longitudinal axis (X2), by an inner radial wall (2084), secured to the body (202), and by a front wall (2086). A front edge (2084b) of the inner radial wall (2084) is offset backward (d1), along the longitudinal axis (X2), relative to the rear surface (2086s) of the front wall (2086).

Female element for a fluid coupling and fluid coupling including such an element This fluid coupling (R) element (200) comprises a body (202) for receiving a complementary end-piece (100), this body being centered on a longitudinal axis (X2) and defining a fluid circulation channel (204) within the body on the one hand, and a sealing chamber (208) in which a sealing gasket able to cooperate with the end-piece (100) inserted in the body (202) is housed, on the other hand. The sealing chamber is defined by an outer radial wall (2082) and a rear wall (2088). This coupling element comprises a locking mechanism (206) that includes locking members (2062) radially movable in the body relative to the longitudinal axis (X2), between a position blocking the end-piece (100) in the body and a position freeing a passage for the end-piece, and a locking ring (2066) mounted around the body and movable relative thereto, between a first position keeping the locking members (2062) in their blocking position and a second position in which the locking ring does not oppose the movement of the locking members toward their released position. The sealing chamber (208) is inwardly radially defined, relative to the longitudinal axis (X2), by an inner radial wall (2084), secured to the body (202), and by a front wall (2086). A front edge (2084b) of the inner radial wall (2084) is offset backward (d1), along the longitudinal axis (X2), relative to the rear surface (2086s) of the front wall (2086).

A pipe connector for connecting with an additional pipe connector includes a first leak-proof pipe, a first sleeve, at least one clamping element and a restricting structure. The first sleeve covers the first leak-proof pipe and allows the first leak-proof pipe to relatively slide therein. The clamping element and the restricting structure are disposed on the first sleeve. The restricting structure is capable of driving the clamping element to clamp or release the additional pipe connector at different positions.

This connection device (D) comprises a shaft (17) which is mobile in translation, a piston (19) integral with the shaft (17), a sleeve (35) which extends around the shaft (17), this sleeve being movable between a rear position and a forward position, and locking members housed in the sleeve (35), each locking member being movable relative to the sleeve between a locking configuration and a release configuration. The shaft (17) is movable between a disconnected position in which the shaft (17) does not oppose movement of the locking members to their release configuration, and the sleeve (35) is in the forward position, and a connected position in which the shaft (17) opposes movement of the locking members into their release configuration and the sleeve (35) is in the rear position, through an intermediate position, in which the shaft (17) opposes movement of the locking members into their release configuration and the sleeve (35) is in the forward position.

A pipe coupling member includes a coupling body defining a part of a fluid passage, and a support member disposed inside the coupling body. A valve accommodating space is defined inside the coupling body at a position forward of the support member, and a valve element is disposed in the valve accommodating space to open and close the fluid passage. The coupling body is formed from a thin-walled pipe material and has a deformed recess formed by plastically deforming radially inward a portion of the coupling body that covers an annular groove of the support member. The deformed recess has a locking element latching surface along a support surface of the annular groove. When the pipe coupling member is connected to an associated pipe coupling member, the locking element latching surface is latched by a locking element of the associated pipe coupling member.

A pipe coupling member includes a coupling body defining a part of a fluid passage, and a support member disposed inside the coupling body. A valve accommodating space is defined inside the coupling body at a position forward of the support member, and a valve element is disposed in the valve accommodating space to open and close the fluid passage. The coupling body is formed from a thin-walled pipe material and has a deformed recess formed by plastically deforming radially inward a portion of the coupling body that covers an annular groove of the support member. The deformed recess has a locking element latching surface along a support surface of the annular groove. When the pipe coupling member is connected to an associated pipe coupling member, the locking element latching surface is latched by a locking element of the associated pipe coupling member.

A multi-functional fitting for piping, tubing or other conduit comprises: a body defining a channel between three ports; a test plug at one port; and a secondary valve at a second port. The test plug comprises a self-closing valve. The test plug is configured to receive a tip of an instrument such as a measuring probe. The secondary valve comprises a different valve configuration and is selectively operable between an open and a closed position. Coupling mechanisms are provided at the second a third port. In an example, the coupling mechanisms are different types. The fitting may be T-shaped, Y shaped, shaped or the like. A method is provided to measure a gas property or maintain a sensor processing unit using the multi-functional fitting.

The invention is a device for releasing and disconnecting a fitting body off of a pipe, which is held with a gripping ring that holds the pipe in fixed position inside the fitting body. Particularly, the device is integrated into valves for disconnecting domestic valves installed over pipes, which are fixed to and extending out of walls. The essential parts of the device are a nut, a pushing sleeve matching into the nut and one or more spiral tracks that couple with bump(s)/ball(s) on the surfaces of the nut and sleeve. This coupling enables radial movement of the nut in a defined spiral forward direction over the fitting body and pushes the sleeve into the fitting body for releasing the pipe off of the gripping ring.