Patent ID: 9458937
Filing Date: 2016-10-04
CPC Classification: F16J

Claim Text:
1. A dynamic shaft seal assembly, comprising: an annular shell extending circumferentially around a center axis; an elastomeric material attached to said annular shell and extending circumferentially around said center axis; said elastomeric material including a lip extending from said annular shell to a lip distal end, said lip including a first lip section projecting toward said center axis at an angle relative to a plane extending perpendicular to said center axis and extending to a dust band, said first lip section presenting an interior diameter extending perpendicular to said center axis; said lip including a second lip section projecting from said dust band away from said center axis at an angle relative to the plane extending perpendicular to said center axis, said second lip section presenting an interior diameter extending perpendicular to said center axis; said dust band being disposed between said first lip section and said second lip section and extending circumferentially around said center axis and radially toward said center axis for engaging the shaft; said dust band presenting an interior diameter extending perpendicular to said center axis, said interior diameter of said dust band being less than said interior diameter of said first lip section and less than said interior diameter of said second lip section; said lip including a plurality of flutes disposed on said second lip section and extending radially toward said center axis for engaging the shaft; each of said flutes extending from said dust band helically along said second lip section toward said lip distal end; and, each of said flutes extending from said dust band along said second lip section at an angle of 2 to 45 degrees relative to said dust band to a flute distal end spaced from said lip distal end.