Apparatus and method for pre-loading of a main rotating structural member
US8469648B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 2008 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jun 13, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B19/155
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for a pipe handling apparatus has a main rotating structural member rotating about a pivot axis relative to a skid and moving from a first position to a second position. A tensioning mechanism is affixed to the main rotating structural member. The tensioning mechanism applies a tension to the main rotating structural member when the main rotating structural member is in the second position. The tensioning mechanism has a first cable having an end attached adjacent a top of the main rotating structural member, and a second cable having an end attached adjacent the top of the main rotating structural member. The first and second cables have opposite ends attached to a fixed surface. The first and second cables extend angularly outwardly from a front of the main rotating structural member. The first and second cables extend angularly outwardly from the sides of the main rotating structural member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.