A description is given of an internally hollow fitting for the passage of a liquid, in particular water, with a component to restrain unmovably a pipe of an irrigation system, wherein restraining component of the pipe is carried by a ring nut screwing on an external thread of the at least one end of the fitting.

A description is given of an internally hollow fitting for the passage of a liquid, in particular water, with a component to restrain unmovably a pipe of an irrigation system, wherein restraining component of the pipe is carried by a ring nut screwing on an external thread of the at least one end of the fitting.

A system for mounting an adapter on a main flexible pipe for connecting a branch pipe is described, including a fitting having an externally threaded shank and a widened base which can be inserted in a hole of the pipe and can be fixed by a first ring nut screwed on the threaded shank, wherein the system includes a tool for inserting the fitting in the hole and for tightening the first ring nut, and wherein on the adapter a second ring nut is provided for fixing the adapter to the fitting.

A system for mounting an adapter on a main flexible pipe for connecting a branch pipe is described, including a fitting having an externally threaded shank and a widened base which can be inserted in a hole of the pipe and can be fixed by a first ring nut screwed on the threaded shank, wherein the system includes a tool for inserting the fitting in the hole and for tightening the first ring nut, and wherein on the adapter a second ring nut is provided for fixing the adapter to the fitting.

A system including an annular socket body for tightening a lock ring around a threaded end of a conduit connector extending through an opening in a wall of a junction box is provided. To facilitate capturing of the lock ring by the socket body without interference, the wrench lugs of the socket body each have a circumferential extent that is less than 50% of a circumferential extent between teeth of the lock ring, and there are half as many wrench lugs than teeth. Flat side faces of the wrench lugs are disposed at an angle of between about 15° and 40° relative to sides of the teeth of the lock rings so that the wrench lugs engage the lock ring teeth in a sliding point contact that promotes uniform engagement between the wrench lugs and the lock ring teeth when torque of about 1400 inch-pounds is applied to the socket body.

A system including an annular socket body for tightening a lock ring around a threaded end of a conduit connector extending through an opening in a wall of a junction box is provided. To facilitate capturing of the lock ring by the socket body without interference, the wrench lugs of the socket body each have a circumferential extent that is less than 50% of a circumferential extent between teeth of the lock ring, and there are half as many wrench lugs than teeth. Flat side faces of the wrench lugs are disposed at an angle of between about 15° and 40° relative to sides of the teeth of the lock rings so that the wrench lugs engage the lock ring teeth in a sliding point contact that promotes uniform engagement between the wrench lugs and the lock ring teeth when torque of about 1400 inch-pounds is applied to the socket body.

A conical seal fitting (CSF) has a longitudinal bore between proximal and distal ends, an exterior conical sealing surface near the distal end and an exterior shoulder between the proximal end and the exterior conical sealing surface. A flange has a through-hole defined by an interior conical sealing surface and interior threads. A gland nut surrounds the CSF and has exterior threads that engage the interior threads. The gland nut presses against the exterior shoulder to push the two conical sealing surfaces together to form a seal. The CSF has an O-ring received in a groove and a trapped annular space is defined between the O-ring and the seal. The flange has a test port extending from outside of a vessel into the annular space. The annular space can be pressurized through the test port to test the seal. A tube passes through the bore and is sealed with the CSF using a ferrule and a nut.

A conical seal fitting (CSF) has a longitudinal bore between proximal and distal ends, an exterior conical sealing surface near the distal end and an exterior shoulder between the proximal end and the exterior conical sealing surface. A flange has a through-hole defined by an interior conical sealing surface and interior threads. A gland nut surrounds the CSF and has exterior threads that engage the interior threads. The gland nut presses against the exterior shoulder to push the two conical sealing surfaces together to form a seal. The CSF has an O-ring received in a groove and a trapped annular space is defined between the O-ring and the seal. The flange has a test port extending from outside of a vessel into the annular space. The annular space can be pressurized through the test port to test the seal. A tube passes through the bore and is sealed with the CSF using a ferrule and a nut.

The present invention relates to a quick-fit connection assembly not affected by accidental rotations during the installation due to the presence of an innovative connecting element (1) which has, in the threaded external region, one or more sliding tracks (3) suitable for engaging with the nosepiece (91) of a corresponding washer (9).

The present invention relates to a quick-fit connection assembly not affected by accidental rotations during the installation due to the presence of an innovative connecting element (1) which has, in the threaded external region, one or more sliding tracks (3) suitable for engaging with the nosepiece (91) of a corresponding washer (9).