Patent ID: 8887830
Filing Date: 2014-11-18
Classification: E02D,E21B

Abstract:
1. A telescoping leader for a construction vehicle, for accommodating a vibrator, pile driver, earth drilling gear mechanism, comprising: an inner leader having a first end and a second end; an outer leader surrounding the inner leader and having a first end and a second end, said outer leader being longitudinally displaceable relative to said inner leader, said outer and inner leaders both having closed material cross-sections; a first guide firmly disposed at the first end of the outer leader, said first end of the outer leader being guided on the inner leader, wherein the inner leader is displaceable in said first guide; and a second guide firmly disposed at an end of the inner leader, said second end of the inner leader being guided in the outer leader, wherein the outer leader is displaceable on said second guide, wherein the inner leader and outer leader are connected with an intermediate leader on which the outer leader is displaceably guided, wherein the inner leader is connected with the intermediate leader via an accommodation of the intermediate leader, wherein the intermediate leader is connected to an exterior surface of the outer leader via guide rails on the intermediate leader; and wherein the outer leader is guided by the inner leader and the intermediate leader at the same time.