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AssigneeArmaturenfabrik Hermann Voss GmbH & Co.
InventorsHarald Schmidt, Hilmar Hester, Volker Kaminiski
Estimating the term…
A pipe fitting (1) for connecting a metallic pipe line (10), including a pipe union (4), which contains a receiving opening (8) for the pipe line (10), a swivel nut (6), which can be threadedly connected with the pipe union (4), as well as metallic cutting ring (18), which is disposed between the pipe union (4) and the swivel nut (6). The cutting ring (18) with an outer cone (30) acts jointly with an inner cone (28) of the pipe union (4) in such a manner, that, when the swivel nut (6) is tightened, it cuts into the material of the pipe line (10) with at least one cutting edge (32) and generates a form-fitting junction. The cutting ring (18) includes--where it joins an outer cone (30)--an essentially radial contact surface (38) for the purpose of limiting the tightening force, when it comes into contact with a face surface (40) of the pipe union (4). The cutting ring (18), in the transition region between the outer cone (30) and the contact surface (38), contains an elastomeric circumferential seal (44) in such a manner, that the circumferential seal (44), when it is in the assembled condition, is under an elastic pre-stress between the cutting ring (18) on the one hand, and at least one partial region of the interior cone (28) of the pipe union (4), which joins the face surface (40) on the other hand.
A pipe fitting for connecting a metallic pipe line, including a pipe union, which contains a receiving opening for the pipe line, a swivel nut, which is threadedly connected to the pipe union, and a metallic cutting ring, the metallic cutting ring disposed between the pipe union and the swivel nut, where the metallic cutting ring includes an outer cone which acts jointly with an inner cone of the pipe union such that, when the swivel nut is tightened, the outer cone is radially deformed toward the interior of the pipe union over a certain region and cuts into the material of the pipe line with at least one cutting edge while utilizing a notch effect and generating a form-fitting junction with the pipeline, and where the metallic cutting ring includes, at the point where the metallic cutting ring joins the outer cone, a radial contact surface for the purpose of limiting the tightening force, when the metallic cutting ring comes into contact with a face surface of the pipe union, characterized in that the metallic cutting ring, in a transition region between the outer cone and the contact surface, contains an elastomeric circumferential seal under an elastic pre-stress between the metallic cutting ring and at least one partial region of the interior cone of the pipe union.
Dependencies are inferred from the claim text.