End recorrugator
US4018072A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1975 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | Oct 22, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D15/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention relates to machines for recorrugating the ends of a helically corrugated pipe. One end of the pipe is inserted between and engaged by a juxtaposed pair of recorrugating rollers. The rollers are mounted on shafts which are driven to recorrugate the end of the pipe. As an improvement in such machines, the present invention provides a rotatable annular thrust ring, the marginal portion of which passes between the shafts. At least a portion of the end of the pipe to be recorrugated is abutted against the thrust ring to prevent axial movement of the pipe as it is being recorrugated. The ring is allowed to rotate during the recorrugating process to minimize damage to the end of the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.