Pipe handling apparatus with arm stiffening
US7980802B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Oct 27, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A pipe handling apparatus has a supporting structure, an arm pivotally interconnected to the supporting structure such that the supporting structure and the arm are movable between a first position and a second position within a single degree of freedom, and a stiffener cooperative with the arm when the arm and the supporting structure are in the second position. The stiffener applies a mechanical resistance to the arm in the second position. The second position is at an end of the travel of the supporting structure and the arm. The stiffener applies a variable resistance to the arm as the arm moves from the first position to the second position. This variable resistance is at its greatest when the arm is in the second position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.