Lubricant Pumping Seal

Abstract

A seal includes an annular body including an outer circumferential surface, an inner circumferential surface defining a central opening about a seal axis, an inner axial face, and an outer axial face. The seal includes at least one continuous, uninterrupted, flexible helically extending sealing lip with an inner edge that is axially offset in a first axial direction relative to the outer edge of the helically extending sealing lip. The seal can include an optional circular lip. The seal can include a pressure relief valve. The seal can be split and can include a seal retainer located in a slot to retain first and second split faces abutted. The seal can be installed in a housing of a wind turbine with shaft of the wind turbine extending through the central opening of the seal body such that the sealing lip is engaged with an outer surface of the shaft.

Dependencies are inferred from the claim text.