Roll grooved pipe
US5246256A · kind A · utility
38Cited by
11References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Apr 1, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L23/125
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A roll grooved pipe is provided on its inner surface with a hydrofoil surface providing a transition between the inner surface of the pipe and the radially innermost portion of a radially inwardly extending step formed in the inner wall of the pipe by the cold rolling of the groove in the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.