Radial shaft seal ring

1 . A radial shaft seal ring for sealing a space between a shaft and a bore in a housing, the shaft seal ring comprising:

a support body having an axial part extending substantially axially and a radial part extending substantially radially and a curved connecting part connecting the axial part to the radial part, the axial part further comprising a first axial section extending from an end of the curved connecting part to a first side of a transition section and a second axial section extending from a second side of the transition section away from the first axial section, an outer diameter of the second axial section being greater than an outer diameter of the first axial section, and

a seal body mounted on the support body, the seal body including a static seal element configured to seal between the support body and the bore and a dynamic seal element having at least one seal lip configured to sealingly abut against the shaft,

wherein the static seal element extends from the first axial section over the connecting part to the radial part of the support body and the static seal element includes an axial seal element section radially outwardly surrounding at least a portion of an outer surface of the first axial section and a radial seal element section abutting against the radial part of the support body,

wherein a radially outer surface of the axial seal element section includes a radially outwardly directed first seal bead and a radially outwardly directed second seal bead, at least a portion of the first seal bead being located directly radially outward of the curved connecting part,

wherein a radially outer surface of the second axial section of the axial part is exposed, and

wherein the second seal bead is axially spaced from the first seal bead by a cylindrical portion of the radial outer surface having an axial length greater than an axial length of the first seal bead and greater than an axial length of the second seal bead.

2 . The radial shaft seal according to claim 1 ,

wherein the entire first seal bead is located directly radially outwardly of the curved connecting part.

3 . The radial shaft seal ring according to claim 1 ,

wherein the static seal element has a first radial thickness radially outward of the axial part of the support body and a second radial thickness radially outward of the curved connecting part, the second thickness being greater than the first thickness.

4 . The radial shaft seal ring according to claim 3 ,

wherein a minimum radial thickness of the static seal element radially inward of the first seal bead is greater than the first thickness.

5 . The radial shaft seal ring according to claim 2 ,

wherein a radial thickness of the static seal element radially outward of the curved connecting part increases from a junction of the axial part of the support body and the curved connecting part in a direction away from the junction of the axial part of the support body and the curved connecting part.

6 . The radial shaft seal ring according to claim 1 ,

wherein the axial seal element section has a substantially constant radial thickness in a region between first seal bead and the second seal bead.

7 . The radial shaft seal ring according to claim 1 , wherein the axial seal element section has a first end at the transitions section and covers the entire first axial section.

8 . The radial shaft seal ring according to claim 7 ,

wherein the first seal bead and the second seal bead are the only seal beads on the axial seal element section.

9 . A system comprising:

a housing having a bore, the bore having an inner diameter, and

a radial shaft seal ring according to claim 1 mounted in the bore,

wherein the radial outer surface of the second axial section is in direct contact with the bore,

wherein the first seal bead and the second seal bead are in direct contact with the bore, and

wherein an outer diameter of the axial seal element section at a location between the first seal bead and the second seal bead is less than the inner diameter of the bore.

10 . The system according to claim 9 ,

wherein the first seal bead and the second seal bead are the only seal beads on the axial seal element section.

11 . The system according to claim 9 ,

including a ring spring mounted on and surrounding the dynamic seal element, at least a portion of the ring spring being located directly radially inward from the cylindrical portion of the radially outer surface.