| US 7,549,240 B2 | ||
| Excavation device | ||
| Mauro Casagrande, Sacile (Italy) | ||
| Assigned to Casagrande SpA, Fontanafredda (Italy) | ||
| Filed on Apr. 13, 2007, as Appl. No. 11/735,181. | ||
| Claims priority of application No. UD2006A0106 (IT), filed on Apr. 21, 2006. | ||
| Prior Publication US 2007/0245599 A1, Oct. 25, 2007 | ||
| Int. Cl. E02F 5/08 (2006.01) | ||
| U.S. Cl. 37—91 [37/462; 37/189; 37/465; 37/352] | 11 Claims |
| 1. Excavation device comprising:
at least a pair of milling wheels with a substantially horizontal axis (X) of rotation, each peripherally equipped with excavation
means, for defining an excavation front substantially parallel to said axis (X);
chain-type transmission means for drawing in rotation, in a first operating condition, each of said milling wheels, said transmission
means being driven by motor means, and also being provided on its side which is external during use with excavation means,
the device further comprising thrust means suitable to be activated to selectively move only said chain-type transmission
means into a second operating position, widened and external with respect to said first operating condition.
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