Apparatus for positioning and stabilizing a concrete slab
US4507069A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1983 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Oct 20, 2003 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D35/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of lifting and stabilizing a concrete slab having an opening therein in which a plate is attached to the top surface of the slab, the plate having an opening coinciding with the opening in the slab, a hydraulic jack having a downwardly extending piston is removeably secured to the plate and a series of tubular shafts are forced downwardly through the opening in the plate and the slab to penetrate the earth beneath the slab and apply lifting force. When the slab has been lifted to the desired elevation, grout, such as a concrete slurry, can be injected below the slab so that the slab is stabilized in the selected elevational position. After the plate is removed the hole in the slab is filled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.