| Patent Number |
Title Of Patent |
Date Issued |
| 6354026 |
Trench rig |
March 12, 2002 |
| A trench rig (1) for excavating continuous monolithic brattices or bases, presenting a self-propelled crawler truck (2), a chain-driven excavating tool (6) provided with a central column (9) which extends along a working axis (A), and a control unit (8) for the column (9) presenting a fi |
| 5431238 |
Drilling tool for use in constructing large diameter piles, ventilating shafts and other similar |
July 11, 1995 |
| A drilling tool is adapted for being releasably mounted to a lower end of a rod string (20) of a drilling rig (30) and includes a container (2) having a cylindrical or truncated-cone shape fitted at the lower end with a plurality of cutting tools or cutters (10) for crushing rock. The dr |
| 5382114 |
Tunnel excavation apparatus |
January 17, 1995 |
| A tunnel excavation apparatus comprises a frame mounted on crawler tracks and provided with pistons comprising stabilizer feet, a power unit, a working unit, and auxiliary movement and positioning services. The working unit is arranged on an arm mounted on one end of telescopic uprights, |
| 5290125 |
Tunnel lining method and apparatus suitable for the purpose |
March 1, 1994 |
| In a tunnel lining method an apparatus, comprising at least one excavation tool of the chain, belt or band type or the like, is positioned to coincide with the longitudinal axis of the tunnel at a point on its extrados; the tool is made to advance to a predetermined depth in a direct |
| 5152638 |
Process and apparatus for excavating tunnels |
October 6, 1992 |
| A machine for consolidating the soil for underground drilling excavations by means of the technique of the protective umbrella comprises a frame or chassis mounted on ground engaging motor driven crawler tracks and is provided with pistons having stabilizing feet. A power unit, which wor |
| 5112161 |
Method for excavating and constructing monolithic continuous straight or circular structural wal |
May 12, 1992 |
| An equipment for excavating and constructing straight or circular continuous monolithic structural walls, comprises a motor driven vehicle provided with a support structure for substaining a beam which is orientable about a vertical and horizontal axis, a slide on one side of the bea |
| 5104260 |
Method and apparatus for tunnelling |
April 14, 1992 |
| The method for boring a tunnel consists in placing an excavation tool at a point of the extrados of the tunnel and in excavating a cavity by imparting the tool an advancement movement having divergent direction with respect to the axis of the tunnel. While the cavity is being filled with |
| 4848972 |
Process and apparatus for widening roadways |
July 18, 1989 |
| The present invention relates to a process for widening roadways. The process starts with digging a trench of adequate depth in the slope of the embankment of the existing roadway at a distance corresponding to the widening. A wall is then built in the trench by means of prefabricated |
