Screwed pipe joint with cutting ring for metal tubes
US6073976A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1998 |
| Grant date | Jun 13, 2000 |
| Priority date | — |
| Expiry date | Mar 6, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S285/918
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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 leas…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.