Forklift movable cribbing column
US7097389B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2005 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | May 31, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D15/48
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A prefabricated cribbing column for supporting a mine roof. The column includes a plurality of concrete cribbing elements the majority of which are interleaved with load transfer disks. Two of the cribbing elements are interleaved with a handle element. The column assembly of cribbing elements, load transfer disks, and handle element are secured together in an integral unit by a steel strap. The handle element extends substantially beyond the outer periphery of the cribbing elements enabling access and lifting by a forklift or similar machinery. The handle element enables the integral column to be easily moved from one location to another. The cribbing elements are preferably constructed of steel fiber reinforced concrete. A column consisting of five cribbing elements has shown to be capable of supporting a load of 575 tons with a deflection of 2.5 inches or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.