Patent ID: 7594705

Claim:
A track roller assembly for a crawler chain having at least one row of projections provided on an inner surface of said crawler chain, said track roller assembly being adapted for mounting in a crawler carrier, said track roller assembly comprising: at least two spaced track roller portions mounted on a shaft having a center axis coinciding with a roller axis of the respective track roller portions, said at least two spaced track roller portions comprising running surfaces for running on said crawler chain, wherein the track roller assembly rests on the crawler chain, and idling means for guiding said track roller assembly on said crawler chain, wherein said idling means is mounted in front of said at least two spaced track roller portions, wherein said idling means is pivotally mounted on said shaft, so that said idling means is pivotal about the center axis of the shaft, and wherein said idling means is operatively arranged for remaining in contact with a run of said crawler chain, on which the running surfaces rest, to avoid lateral displacement relative to said two spaced track roller portions or roll up on to the at least one row of projections of said crawler chain.