20110168421 | Telescoping leader - A telescoping leader for a construction vehicle for accommodating a vibrator, pile driver, earth drilling gear mechanism, or the like, has an outer leader that is disposed so that it can be longitudinally displaced relative to an inner leader. The inner leader and outer leader have closed material cross-sections, and the outer leader surrounds the inner leader. At the end of the outer leader that can be displaced on the inner leader, and at the end of the inner leader that is guided in the outer leader, a guide is firmly disposed, on which the outer leader can be displaced. | 07-14-2011 |