Patent ID: 6865828

Claim:
A coupling for a tooth of earth-moving machines, comprising projecting lugs on the tooth configured to couple with matching seatings of a tooth holder and a transverse seating for a pin, the lugs of the tooth longitudinally have stepped guides on upper and lower edges of the lugs and which continue in an area of attack in widened abutment regions to obtain greater reinforcement, combined with matching profiles of said stepped guides and widened regions in a body of the tooth holder and with an internal projecting abutment arranged in at least one of said lugs, configured to be guided in an internal part of a corresponding straight guide of the tooth holder, said abutment, after mounting of the tooth in the tooth holder, arranged to retain the pin, the pin disposed in a pin seating provided in a generally vertical arrangement in the body of the tooth holder; and wherein the lugs of the tooth are gently inclined transversely, the upper and lower edges of the lugs being in different vertical planes.