A crimping tool for crimping a metallic crimp ring. The crimping tool includes a first crimp die having a first curved contact surface and a second curved contact surface, the second curved contact surface spaced apart from the first curved contact surface, and a trench extending between the first curved contact surface and the second curved contact surface. The crimping tool also includes a second crimp die cooperatively engageable with the first crimp die having a first curved contact surface and a second curved contact surface, the second curved contact surface spaced apart from the first curved contact surface, and a trench extending between the first curved contact surface and the second curved contact surface. The trench of the first crimp die and the trench of the second crimp die forms an annular bead in a center portion of the metallic crimp ring.

A fluid transfer assembly is described that includes a fitting comprising a lumen having an opening, and at least one barb, the at least one barb extending circumferentially around the lumen proximate to the opening. The assembly also includes a flexible conduit, a deformable sleeve, and an elastomeric liner disposed between the sleeve and the conduit. The fitting extends at least partially into the conduit such that the conduit extends over the at least one barb. The elastomeric liner applies substantially 360 degree radial pressure to the conduit such that the conduit is sealingly compressed around the at least one barb of the fitting. The assembly is fluid tight up to a burst pressure of the conduit.

A crimping tool for crimping a metallic crimp ring. The crimping tool includes a first crimp die having a first curved contact surface and a second curved contact surface, the second curved contact surface spaced apart from the first curved contact surface, and a trench extending between the first curved contact surface and the second curved contact surface. The crimping tool also includes a second crimp die cooperatively engageable with the first crimp die having a first curved contact surface and a second curved contact surface, the second curved contact surface spaced apart from the first curved contact surface, and a trench extending between the first curved contact surface and the second curved contact surface. The trench of the first crimp die and the trench of the second crimp die forms an annular bead in a center portion of the metallic crimp ring.

A clamp ring type metal seal gas pipe joint is connected to one end of a gas pipe, and includes a fitting joint, a nut, and a clamp ring. Axial contact surfaces of the clamp ring and the fitting joint are respectively provided with a convex portion configured in a convex V shape and a concave portion configured in a concave V shape matched with each other, so that an end part of the gas pipe is compressed and self-flared to form a sealing part when the fitting joint is tightened. In the process of tightening the nut and the fitting joint, the end part of the metal bellow is compressed and self-flared by the convex portion of the clamp ring and the concave portion of the fitting joint to form a cone surface to realize limit fixation and form a double sealing.

A conduit outlet assembly for a rigid metal conduit raceway of an electrical system is provided. A conduit outlet assembly includes a gasket, a gripping ring, and a condulet assembly. The gasket is sized to circumscribe an outer surface of a rigid metal conduit of the rigid metal conduit raceway. The gripping ring is sized to circumscribe the outer surface of the rigid metal conduit. The condulet assembly is sized to receive the rigid metal conduit, and includes an adapter and a condulet. The adapter includes a compression section and a coupling section, wherein the compression section is sized to receive the rigid metal conduit with the gasket and the gripping ring disposed thereon. The condulet is sized to receive the coupling section of the adapter.

A coupler for connecting to a tube (e.g., a siphon tube), a fire extinguisher incorporating the same, and a method for connecting a coupler to a tube are provided. The coupler includes a body defining a radially outward facing surface, a radially inward facing surface, a proximal end, and a distal end. The coupler includes a foldable section disposed at the proximal end. The foldable section including an unfolded position defining an unfolded internal diameter and a folded position defining a folded internal diameter. The foldable section is configured to receive a proximal end of the tube in the unfolded position. The foldable section is configured to secure to the circumferential groove in the folded position.

Provided are a mechanical tube fitting for preventing bending fracture of a tube member to be joined when subjected to bending deformation, and a simple tube fitting structure including that tube fitting. In the tube fitting, a clearance between a tube member (32) to be joined and an outer pipe (12) or an inner pipe (14) which is coaxially inserted in the outer pipe (12) and gives a space between its outer surface and the inner surface of the outer pipe (12), in which space the tube member (32) is inserted, is sealed with a sealing member disposed between the outer pipe (12) and the inner pipe (14), and the above-mentioned components are fixed by caulking. The outer pipe (12) is configured to extend outwardly in its axial direction than the ends of the inner pipe (14).

A clamp ring type metal seal gas pipe joint is connected to one end of a gas pipe, and includes a fitting joint, a nut, and a clamp ring. Axial contact surfaces of the clamp ring and the fitting joint are respectively provided with a convex portion configured in a convex V shape and a concave portion configured in a concave V shape matched with each other, so that an end part of the gas pipe is compressed and self-flared to form a sealing part when the fitting joint is tightened. In the process of tightening the nut and the fitting joint, the end part of the metal bellow is compressed and self-flared by the convex portion of the clamp ring and the concave portion of the fitting joint to form a cone surface to realize limit fixation and form a double sealing.

A conduit outlet assembly for a rigid metal conduit raceway of an electrical system is provided. A conduit outlet assembly includes a gasket, a gripping ring, and a condulet assembly. The gasket is sized to circumscribe an outer surface of a rigid metal conduit of the rigid metal conduit raceway. The gripping ring is sized to circumscribe the outer surface of the rigid metal conduit. The condulet assembly is sized to receive the rigid metal conduit, and includes an adapter and a condulet. The adapter includes a compression section and a coupling section, wherein the compression section is sized to receive the rigid metal conduit with the gasket and the gripping ring disposed thereon. The condulet is sized to receive the coupling section of the adapter.

A conduit outlet assembly for a rigid metal conduit raceway of an electrical system is provided. A conduit outlet assembly includes a gasket, a gripping ring, and a condulet assembly. The gasket is sized to circumscribe an outer surface of a rigid metal conduit of the rigid metal conduit raceway. The gripping ring is sized to circumscribe the outer surface of the rigid metal conduit. The condulet assembly is sized to receive the rigid metal conduit, and includes an adapter and a condulet. The adapter includes a compression section and a coupling section, wherein the compression section is sized to receive the rigid metal conduit with the gasket and the gripping ring disposed thereon. The condulet is sized to receive the coupling section of the adapter.