US 12,687,228 B2 · Sealing device

Abstract

A sealing device is arranged between two relatively displaceable members containing an object to be sealed, for example, a drive shaft of an electric vehicle, and a housing for the drive shaft. A sealing body made of conductive rubber provided in the sealing device is fixed in a state of contact with the housing by an outer peripheral seal, and brings a sealing surface provided on a conductive lip into surface contact with the drive shaft to seal the object. A grease groove is provided on the sealing surface to retain grease having conductivity. The grease is filled between the drive shaft and the sealing surface, and forms a conducting circuit along with the sealing body which makes the drive shaft acting as an antenna for electromagnetic noise and the housing conductive.

Claims20

Dependent claims

A sealing device, comprising:

a sealing body made of conductive rubber, which is fixed in a state of contact with one of two relatively displaceable members containing an object to be sealed and integrally has an annular conductive lip having a tip brought into contact with the other of the two members to seal the object;
a sealing surface provided at the tip of the conductive lip to be brought into surface contact with the other member;
grease having conductivity, which is filled between the sealing surface and the other member;
grease grooves provided in the sealing surface to retain the grease;
a connecting groove that connects the grease grooves;
and
wherein the grease grooves and the connecting groove are formed in the sealing surface of the conductive lip.

4 more elements

Dependencies are inferred from the claim text.

Sealing device

Life of this patent

Sealing device

Life of this patent

Abstract

Claims20