Patent ID: 9644743
Date: 2017-05-09
CPC Classifications: F16J

Claim:
1. A sealing device inhibiting a sealing fluid on an inboard side of the sealing device from leaking to an atmospheric side of the sealing device, comprising: a seal lip having a lip end configured to come into contact with a shaft; a plurality of screws circumferentially provided on an atmospheric side inclined surface of said seal lip, said screws configured to exert a pumping action in relation to said sealing fluid; and a three-dimensional shape longitudinally extending along said atmospheric side inclined surface so as to inhibit dust on the atmospheric side from intruding toward said lip end, said three dimensional shape bifurcating said atmospheric side inclined surface into a first surface and a second surface, said second surface being co-planar with the first surface, wherein said three-dimensional shape is constructed by a projection or a groove, wherein said projection is formed approximately as a triangular shape having an apex coming close to the atmospheric side in cross section, and wherein said groove is formed approximately as a triangular shape having a bottom point coming close to a lip end side in cross section.