Abstract: The invention is directed to an endless cutting chain for an underground trenching assembly that has a plurality of cutter links with a strap link joining adjacent cutter links. Each cutter link has a pair of side plates and a support member bridging the side plates. The support member has an arcuate support surface for attachment of at least one cutting member. The support member and the cutting members are adapted so as to permit substantially unrestricted selection of lateral positions of the cutting members on the arcuate support surface of the support member. Additionally, some cutter links on the cutting chain have an arcuate drag plate attached to the support member of the cutter link. The drag plate in combination with the arcuate support surface produces a cleaner round bottom trench 11. Additionally, the drag plate provides wear protection to the chain rivet heads.

Abstract: The present disclosure relates to a cutting tooth for a trencher chain. The tooth includes a base portion aligned along a first plane. The base portion includes structure for allowing the cutting tooth to be connected to the trencher chain. The tooth also includes a distal portion that is generally obliquely aligned with respect to the first plane. A curved transition is located between the distal portion and the base portion. The curved transition curves away from the first plane and at least partially forms a cupped portion that extends from a leading end to a trailing end of the cutting tooth. The tooth also includes a hardened tip positioned at a region of the leading end that is located farthest from the first plane. The leading edge includes more than one effective configuration.

Abstract: The present disclosure relates to a cutting tooth for a trencher chain. The tooth includes a base portion aligned along a first plane. The base portion includes structure for allowing the cutting tooth to be connected to the trencher chain. The tooth also includes a distal portion that is generally obliquely aligned with respect to the first plane. A curved transition is located between the distal portion and the base portion. The curved transition curves away from the first plane and at least partially forms a cupped portion that extends from a leading end to a trailing end of the cutting tooth. The tooth also includes a hardened tip positioned at a region of the leading end that is located farthest from the first plane. The leading edge includes more than one effective configuration.

Abstract: The present disclosure relates to a cutting tooth for a trencher chain. The tooth includes a base portion aligned along a first plane. The base portion includes structure for allowing the cutting tooth to be connected to the trencher chain. The tooth also includes a distal portion that is generally obliquely aligned with respect to the first plane. A curved transition is located between the distal portion and the base portion. The curved transition curves away from the first plane and at least partially forms a cupped portion that extends from a leading end to a trailing end of the cutting tooth. The tooth also includes a hardened tip positioned at a region of the leading end that is located farthest from the first plane.

Abstract: A trencher includes a frame. Ground engaging wheels and a chain are mounted on the frame. Sleeves are attached to and extend outwardly from the chain. Rotatable and fixed-orientation teeth can be mounted in the sleeves.