Patent Number: 8,721,213

Title: Seal assembly for track pin joint assembly

Abstract: A seal assembly can be incorporated into a track pin joint assembly including a pin defining a longitudinal axis, a first member and a second member both coaxial with the pin about the longitudinal axis. The first member is pivotable about the longitudinal axis with respect to the second member and includes a load ring engagement surface defining a seal cavity disposed in proximal relationship to the second member. A seal assembly including a seal ring and a load ring is disposed in the seal cavity and sealingly engages the first and second members. An axial segment of a seal ring engagement surface of the load ring extends over at least half the length, measured along the longitudinal axis, between a radial segment of the seal ring engagement surface and a radial segment of a first member engagement surface of the load ring. At least one of a load ring engagement surface of the first member and an axial segment of the first member engagement surface of the load ring includes a convex rounded portion.

Inventors: Johannsen; Eric J. (Washington, IL), Recker; Roger L. (Dunlap, IL), Sebright; Jason L. (Chillicothe, IL), Kiesel; Mark J. (Peoria, IL), Liang; Guanghui (Dunlap, IL), Diekevers; Mark (Metamora, IL)

Assignee: Caterpillar Inc.

International Classification: F16G 11/00 (20060101)

Expiration Date: 5/13/12018