US 12,281,703 B1
Outboard drive axle hub seal with venting
Keith Clark, Rumney, NH (US)
Assigned to Freudenberg-NOK General Partnership, Plymouth, MI (US)
Filed by Freudenberg-NOK General Partnership, Plymouth, MI (US)
Filed on Jan. 10, 2024, as Appl. No. 18/408,880.
Int. Cl. F16J 15/3232 (2016.01); F16J 15/3252 (2016.01); F16J 15/3284 (2016.01)
CPC F16J 15/3232 (2013.01) [F16J 15/3252 (2013.01); F16J 15/3284 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A radial shaft seal, comprises:
an outer cover having a cylindrical portion configured to be received in a bore of a first member and a radial portion extending radially inward from an end of the cylindrical portion;
an inner seal element having a metal case with an inner cylindrical portion configured to be received on a second member and the metal case including a radial portion extending radially outward from the inner cylindrical portion, the inner seal element including a dynamic oil seal lip that extends from the radial portion of the metal case and engages the radial portion of the outer cover, the inner seal element including a static oil seal lip that extends from the radial portion of the metal case;
an inner cover including a cylindrical inner portion that engages the inner cylindrical portion of the metal case of the inner seal element and a radial portion that extends radially outward from the cylindrical inner portion, the static oil seal lip engaging the radial portion of the inner cover; and
a vent passage provided from an oil side to a cavity defined between the static oil seal lip, the inner cover and the metal case of the inner seal element.