A fitting for use with metallic pipe is disclosed. The fitting includes a body having a connection portion and an opening for receiving an end of the metallic pipe in an insertion direction along a longitudinal axis of the connection portion, a retainer positioned within the connection portion coaxial with the longitudinal axis, the retainer having a plurality of prongs extending radially towards the longitudinal axis, and a gripper positioned within the connection portion coaxial with the longitudinal axis between the retainer and the opening. The gripper is configured as a frusto-conical compression ring tapering towards the opening and has a plurality of gripping projections extending radially towards the longitudinal axis. In operation, the gripper and connection portion cooperate to increase compression on the metallic pipe if the metallic pipe is urged out of the fitting.

The hose joint includes a guide part provided in a nipple and provided to face an inner surface of a hose body having flexibility, a tightening member having a tapered surface provided to face an outer peripheral surface of the guide part and have a diameter which gradually becomes larger in an inserting direction of the hose body, a sleeve provided to be reciprocatable in each of the inserting direction of the hose body and an opposite hose pullout direction along the tightening member and be capable of elastic diameter expansion/contraction deformation in a radial direction, and an elastic member provided so as to press the sleeve in the hose pullout direction along the tapered surface.

A hose joint, includes: a guide part provided at a nipple, and provided opposed to an inner surface of a hose body having flexibility; a tightening member having a tapered surface provided opposed to an outer peripheral surface of the guide part, so as to have g diameter increasing larger gradually in an inserting direction of the hose body; a sleeve provided reciprocatably in the inserting direction of the hose body and a hose pullout direction in an opposite direction thereto along the tightening member, and in a manner capable of undergoing diameter expansion and contraction deformation in a radial direction elastically; and an elastic member provided so as to press the sleeve in the hose pullout direction along the tapered surface.

The present disclosure provides a compression teeth ring connection pipe fitting, which includes a pipe fitting body and a sealing component; the pipe fitting body includes a middle pipe section, a first flared section, and a second flared section; a diameter of the first flared section is greater than a diameter of the middle pipe section, and a first limit platform is formed at a connection position between the two; a diameter of the second flared section is greater than that of the first flared section, and a second limit platform is formed at a connection position between the two; the sealing component includes a sealing ring, a high temperature sealing ring, and a teeth ring that are coaxial and sequentially arranged; inner rings of the sealing ring, the high temperature sealing ring, and the teeth ring form a space for nesting a steel pipe body.

Stab-type pipe fittings capable of being inserted onto plastic pipes are provided. The pipe fittings have an outer casing with pipe ports, a hollow inner casing positioned within the outer casing, a pipe gripper and stiffener positioned within the inner casing. The pipe ports have an elongated lip that straightens a pipe inserted into the fitting. The stiffener provides a multi-compression seal to facilitate the leak proof connection.

A pipe coupler for coupling pipes of different kinds with a one or more crown partially flexible heads, integrated into the ends of the pipe coupler for accommodating grip rings and seals for coupling pipes of different kinds. The crown heads have planes at different levels that form grooves for accommodating the seals, and a backward trimmed cone-shape inner surface plane and flat plane for locking the grip rings inside corresponding recesses in the crown head. The external surface of the grip rings is also cone-shaped that corresponds the shape of the inner surface of the crown head and in friction contact with this inner surface. The grip ring blocks the seal from slipping out, and has sets of teeth for engaging with and locking to a pipe inside the coupler. Clamp bands wrap around the external surface of the crown heads that yield against it, thereby tightening the grip of the teeth in the pipe as internal pressure increases inside the pipe and causes the grip ring to axially travel towards the proximal end of the crown head. All parts of the coupler are made of synthetic materials and thereby avoid corrosive processes.

The invention relates to a coupling device (1) comprising:a hollow body (2) defining a housing (3) which comprises an opening (4);a locking ring (6) arranged in the housing and intended to engage with an inserted tube;a first stop (7);a cartridge (12) against which the tube is intended to butt in order to impose a connection state on the cartridge, the cartridge being able to slide between a first and a second position, the passage of the cartridge (12) from the second position to the first position causing the locking ring (6) to butt against the first stop (7), and the passage of the cartridge from the first position to the second position placing the locking ring (6) at a distance from the first stop (7);a spring (14) exerting a force against the cartridge (12).

A coupling device is provided with an indicator of good connection. In particular, the indicator is a sound emission means, more particularly a whistle, which, when activated reveals a connection fault, and, in particular, a leak, in the connection. The proposed arrangement also uses cleanliness means configured to limit, or even prevent, the entry of dust into the coupling device. In order to effectively combine the sound emission means and cleanliness means, one or more escape paths are provided that bypass the cleanliness means.

A fitting for a pipe includes a cylindrical sleeve including at least one observation through window, a spigot disposed concentrically within the cylindrical sleeve and having an outer surface sized to fit within a proximal end of the pipe, wherein the cylindrical sleeve is movable with respect to the spigot in a proximal direction to a sealed position and a locking assembly interposed between the cylindrical sleeve and the spigot to lock the cylindrical sleeve to the spigot in the sealed position. The at least one observation through window provides a view of at least a portion of the locking assembly to determine whether the cylindrical sleeve is locked in the sealed position.

A fluid connection element, comprising: a body; a locking ball; a locking ring, movable between a blocking position, blocking the locking ball in a locking position, and a release position, releasing the locking ball; an actuation ball, to drive the locking ring to the release position during coupling; and a maneuvering ring, mounted around the locking ring and comprising an internal radial wall, radially facing the front annular part and whose diameter is less than the diameter of a cylinder coaxial with the body and comprising said actuation ball, the locking ring comprising a radial heel to be driven by the maneuvering ring.