Patent ID: 9726291
Date: 2017-08-08
CPC Classifications: F16J,Y10T

Claim:
1. A shaft seal, comprising: a radially outward flange area and a radially inward sealing lip connected to the flange area, the sealing lip having at least one sealing edge on a radial inner face of the sealing lip, and wherein the sealing lip is connected to the flange area via an intermediate area; and an annular spring arranged on a radial outer face of the sealing lip, the spring having a U-shaped or V-shaped cross section defined by a radial outer limb and a radial inner limb, the radial outer limb bearing on the flange area, and the radial inner limb bearing on a portion of the radial outer face of the sealing lip such that an end face of the radial inner limb is radially opposite the at least one sealing edge, and the spring is arranged so that the spring is completely separated by a closed space from the intermediate area; wherein a first surface of the spring defines an opening of the U-shaped or V-shaped cross section and is coated with an elastomer, a second surface of the spring is opposite the first surface of the spring and is directed away from the opening of the U-shaped or V-shaped cross section, an end face of the radial outer limb is radially opposite the end face of the radial inner limb, wherein the end faces of the radial inner and radial outer limbs are coated with the elastomer, and wherein at least the second surface of the spring proximate to the intermediate area is substantially not coated with elastomer, and wherein the spring is alternately slit from one of the outer limb or the inner limb, into the other of the outer limb or the inner limb, and the slits are coated by the elastomer, and wherein the spring does not directly contact the flange area or the sealing lip.