One-piece track pin

Claim 1

An articulated joint adapted for use in a track assembly for a track-type vehicle comprising a one-piece pin means including a pair of laterally spaced cylindrical pin portions and a cylindrical bushing portion disposed intermediate said pin portions and having an outside diameter substantially larger than the outside diameters of said pin portions, a pair of laterally spaced first links each secured to a respective pin portion of said pin means, a pair of laterally spaced second links each pivotally mounted on a respective one of said pin portions, retaining means for preventing axial outward movement of said second links relative to said pin means, annular sealing means disposed between each adjacent pair of said first and second links and further disposed solely in an annular counterbore defined in each of said second links for engaging a respective one of said first links in sealing contact therewith, means defining a lubricant-retaining cavity in said pin means and passage means communicating said cavity with a pivotal connection between each of said second links and a respective one of said pin portions, an end cap secured to an outer end of each of said second links for closing said passage means for preventing egress of lubricant thereby and ingress of dirt into said joint, and a retaining means positioned on each end of said pin means for preventing axial movement of said pin means relative to said second links and fully covered by said end cap to protect and prevent dislodgement of said retaining means.