Apparatus and method for sinking concrete shaft
US11078788B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2020 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Jul 8, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21D7/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A shaft sinking apparatus for sinking a concrete shaft in a pit includes at least one first steel beam disposed to span the concrete shaft, two second steel beams disposed on the first steel beam, at least two tightening units configured to force the second steel beams into abutment against the first steel beam, and at least two jack members provided among the first and second steel beams. When each of the jack members is actuated, the first steel beam is driven by the jack members to move downwardly away from the second steel beams to thereby force a lower surrounding edge of the concrete shaft to sink into a bottom surface of the pit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.