Seal with plastic inner cup

摘要

A heavy duty composite oil seal with an outer cup and a plastic inner cup. The outer cup includes a major diameter mounting flange portion terminating in a curl, a minor diameter wear sleeve portion, and a transition portion joining the major and minor diameter portions. There is an elastomeric seal body and an embedded stiffener, with the elastomeric seal body having a sealing lip contacting the inner axial surface of the wear sleeve portion. There is a plastic inner cup member with an axial flange substantially co-extensive with the mounting flange and entrapped along the major diameter flange portion between the curl portion and the transition portion of the outer cup. The inner cup also has a radially extending flange that engages a radial portion of the elastomeric seal body. The plastic inner cup member has a continuous curvilinear inner surface.

主权项

1. A heavy duty composite oil seal, comprising, in combination, an outer cup, including an axially extending major diameter mounting flange portion terminating in a curl portion, an axially extending, minor diameter wear sleeve portion, a transition portion joining said axially extending major diameter portion and said minor diameter wear sleeve portion, a seal element including an elastomeric seal body and an embedded stiffener, said elastomeric seal body having a sealing lip contacting the inner axial surface of said minor diameter wear sleeve portion, and a relatively rigid plastic inner cup member having an axial flange substantially co-extensive with said axially extending major diameter mounting flange portion and entrapped along said axially extending major diameter mounting flange portion between said curl portion and said transition portion of said outer cup, said plastic inner cup member also having a radially extending flange engaging a radial portion of said elastomeric seal body, said relatively rigid plastic inner cup member having a continuous curvilinear inner surface defining a concave portion and a convex portion.