Patent ID: 9285034
Filing Date: 2016-03-15
CPC Classification: F16J

Claim Text:
1. A seal assembly for sealing around a rotatable shaft, the seal assembly comprising: a primary seal comprising a first sealing member having an inside flange with a seal lip for sealing against a movable shaft, a first sealing retaining ring engaging the first sealing member and together with the first sealing member defining a spring cavity having a canted coil spring located therein biasing against the seal lip and at least part of the first sealing retaining ring; a backing ring having a radial wall supporting a central portion of the first sealing member and having an outside longitudinal extending shelf and an inside longitudinal extending shelf, said inside longitudinal extending shelf supporting the inside flange of the first sealing member; and a secondary seal comprising a second sealing member having an inside flange with a seal lip for sealing against a movable shaft, a second sealing retaining ring engaging the second sealing member and together with the second sealing member defining a spring cavity having a second canted coil spring located therein biasing against the seal lip and at least part of the second sealing retaining ring; a top of said second sealing retaining ring in contact with the outside longitudinal extending shelf to retain the secondary seal to the backing ring.