US 11,999,420 B2
Track roller for undercarriage system having inverted seal, and roller rim for same
Gennaro Suanno, Peoria, IL (US); Andrea Cinquanta, Castelvetro di Modena (IT); and Graziano Nozza, Solignano Nuovo (IT)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Mar. 26, 2021, as Appl. No. 17/214,371.
Prior Publication US 2022/0306219 A1, Sep. 29, 2022
Int. Cl. B62D 55/15 (2006.01); B62D 55/092 (2006.01)
CPC B62D 55/15 (2013.01) [B62D 55/092 (2013.01)] 20 Claims
OG exemplary drawing
 
13. A track roller for a ground-engaging track system comprising:
a roller body including an outer tread surface, and an inner surface forming a first seal bore, a second seal bore, and a shaft bore defining a roller axis and extending between the first seal bore and the second seal bore;
a roller shaft;
a seal assembly including an outer seal carrier within the first seal bore and fixed to rotate with the roller body about the roller shaft, and a face seal;
the face seal including an outer seal ring and an outer seal element, supported in the outer seal carrier, and an inner seal ring and an inner seal element, and the outer seal element is radially inward of the outer seal ring and squeezed in radial compression between the outer seal ring and the outer seal carrier.