Patent ID: 7617621
Filing Date: 2009-11-17
Classification: B27B,E02F

Abstract:
1. A trenching chain tooth for a trenching chain, the tooth comprising: a mounting portion arranged for attachment to the trenching chain; a support portion projecting laterally from the mounting portion to one side thereof; a first cutting portion projecting to a side of the support portion opposite the mounting portion along a distal edge of the support portion opposite the mounting portion; and a second cutting portion projecting laterally from the first cutting portion to a same side thereof as the support portion along an edge of the first cutting portion opposite the support portion so as to project over the support portion at a distance therefrom; respective cutting edges being defined at leading edges of the first and second cutting portions nearest a leading end of the supporting portion, the respective cutting edge of the second cuffing portion extending obliquely away from the respective cutting edge of the first cutting portion toward a trailing end of the supporting portion opposite the leading end thereof.