Screwed pipe joint with cutting ring for metal tubes

Details Screwed pipe joint with cutting ring for metal tubes Screwed pipe joint with cutting ring for metal tubes

1998-03-06

2000-06-13

Arola, Dave W.

Pipe joints or couplings

Packed

Wedge

2853827, 285910, 285918, F16L 1706

Patent

active

060739762

ABSTRACT:
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.

REFERENCES:
patent: 2437632 (1948-03-01), Wolfram
patent: 3708186 (1973-01-01), Takagi et al.
patent: 3857591 (1974-12-01), Voss
patent: 4529231 (1985-07-01), Greenawalt
patent: 4867489 (1989-09-01), Patel

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