Self propelled internal pipe arching apparatus
US4974440A · kind A · utility
8Cited by
7References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Oct 30, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F9/185
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An internal pipe arching apparatus has a self propelled unit for ground supporting an elongated longitudinal beam along its length. The unit is adapted to drive the beam into a pipe along its axis and lift the beam to a pipe arching position. The beam has an internal pipe arching means mounted thereto for forcible arching of a pipe when said beam is in the arching position. The mobile unit provides means for transporting and controlling the pipe expansion means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.