Coupling units connecting tubular members having a hardened inner wall for carrying mechanically abrasive fluid concrete
US6766570B1 · kind B1 · utility
10Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2002 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Dec 16, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49879
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for forming and attaching a clamping collar to a pipe configured for forming a pipe section in a concrete pumping line for carrying of fluid concrete includes the steps of placing a sleeve on the pipe to provide a heat transfer limit area between the sleeve and the pipe; welding the sleeve to the pipe; heat treating the pipe; and assembling a collar to the sleeve and welding the collar to the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.