Cornering pipe traveler
US5172639A · kind A · utility
134Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Mar 26, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L2101/30
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A cornering pipe traveler includes a tractor having a pair of carriages, a leading carriage and a trailing carriage, each carriage including a clamping device for positively engaging the inner surface of the pipe, and structure for propelling the carriage along the pipe; interconnected between the pair of carriages there is a device for exerting a curling force between the two carriages for mechanically compelling the lead carriage to curl and enter a turn in the pipe; also included is structure for aligning the lead carriage so that the curling force compels the pipe traveler to enter a selected turn to be made.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.