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| Number | Title | Issue Date |
| 8043028 | Apparatus for providing a support column A primary earth penetrating mandrel formed of a hollow shell steel plate octagonal in cross-section has an upper end and a blunt lower end joined by an upwardly and outwardly tapered wall. The mandrel is driven downwardly in the earth to simultaneously form a vertic... | 10/25/2011 |
| 7731454 | Method for placing reinforced concrete piling without utilizing a pile driver or an auger Piling, apparatus and methods for pouring a concrete piling in situ around pre-positioned reinforcing rods inside removable hollow pipe sections that have been screwed into the ground. A final coupler pipe section including a removable coupler device is releasably a... | 06/08/2010 |
| 7326004 | Apparatus for providing a rammed aggregate pier A primary earth penetrating mandrel formed of a hollow shell steel plate octagonal in cross-section has an upper end and a blunt lower end joined by an upwardly and outwardly tapered wall. The mandrel is driven downwardly in the earth to simultaneously form a vertic... | 02/05/2008 |
| 7201540 | Construction process for composite pile foundation A construction process for the composite pile foundation which consists of the expanded belled base and the pile shaft, the construction process comprising the steps of: a) Aligning the pile tip at the pile location and place the casing at the top of the pile tip; b... | 04/10/2007 |
| 6283231 | Soil displacing screw auger and method for making a concrete pile with this auger Soil-displacing screw auger which contains an auger tube (1); a double displacement body (2) equipped with a hollow shaft (8) fixed to the auger tube (1) and containing an upper part (6) which constitutes a closed screw the radius of which increases towar... | 09/04/2001 |
| 6033152 | Pile forming apparatus An improved lateral soil displacement and compaction auger (24) is provided including a central shaft (34) equipped with a central cementious material pipe (42), helical flighting sections (36,38) and lower rollers (64A-64E) positioned between lower fligh... | 03/07/2000 |
| 5697734 | Method for forming a foundation pile in the ground utilizing a prefabricated pile shaft A method for forming a foundation pile in the ground utilizing a prefabricated pile shaft, placed with clearance into a tube screwed into the bearing ground layer, which tube is provided with a screw blade. Between the wall of the tube and the pile shaft ... | 12/16/1997 |
| 5501550 | Pile assembly and method employing external mandrel A piling assembly is provided which comprises a casing unit comprising an upright hollow casing having a drive boot secured to the bottom of the casing, and an external mandrel adapted to be supported on the drive boot in surrounding relation with the cas... | 03/26/1996 |
| 4623025 | Soil-displacement drill and method for manufacturing a pile To the drill pipe connects a head comprising a cylinder-shaped portion and a cone-shaped point. Three spiral ribs are regularly distributed over the head. Each rib has a downwardly-extending rib portion standing on the point and having an outer side makin... | 11/18/1986 |
| 4619558 | Apparatus for producing in-situ concreted piles with enlarged bases An apparatus for producing a concrete pile in the ground with an enlarged base, including a tube having a diameter, and an upper and a lower end, a shoe provided at the lower end of the tube and having a larger diameter than the tube so as to form a gap b... | 10/28/1986 |
| 4544515 | Method for producing in-situ concreted piles with enlarged bases A method and apparatus for producing in-situ concrete piles with enlarged bases. The method includes the steps of: driving into the ground a tube provided at its lower end with a shoe which is larger than the diameter of the tube, and with an outer casing... | 10/01/1985 |
| 4158518 | In situ pile forming method After wet-drilling a hole until a bearing strata is reached, a mandrel with a removable overboot is lowered into the hole and the overboot is seated by a few hammer blows. The mandrel is than partly filled with thick concrete from its top, the top of the ... | 06/19/1979 |
| 4152089 | Method and apparatus for forming a cast-in-place support column A method and apparatus for forming a cast-in-place support column includes a ground penetration member which forms a bore when driven to a desired depth in the ground. Apparatus is provided for introducing fill material in a liquefied state under pressure... | 05/01/1979 |
