Duplex pipe end working method
US6895652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 2003 |
| Grant date | May 24, 2005 |
| Priority date | — |
| Expiry date | Oct 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/0596
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A duplex pipe (10) is cut with a cutting tool (30), for cutting connecting ribs (13) from the end face of the duplex pipe (10) which is held with an outer pipe (11) chucked (rib cutting step). The duplex pipe (10) is cut from the end face of the duplex pipe (10) up to the portion thereof corresponding to the exposed length of the inner pipe (12) to thereby form a slit (21) in the outer pipe (11) and connecting ribs (13) (slit forming step). The cutting tool (30) has a guide hole (31) into which the inner pipe (12) can be inserted while guiding the inner pipe outer peripheral surface (12a), a cutting device (32) for cutting the connecting ribs (13), and a guide pin (33) which can be inserted into the inner pipe (12) while guiding the inner pipe inner peripheral surface (12b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.