Abstract: A cartridge-type seal including an integrated contact surface and adapted to be pre-assembled to serve for sealing heavily stressed axles or shafts under tough operating conditions, especially in dirty and/or moist environments, comprising a first casing member and a second casing member rotatable with respect to the first one, the first casing member comprising a radial sealing lip and the second casing member comprising at least one contact surface against which the sealing lip abuts, and one of the two casing members being keyed to the axle or shaft is characterized in that the casing member keyed to the axle or shaft is supported on a collar of the axle or shaft or on a ring which is keyed to the axle or shaft.

Abstract: A shaft sealing ring, comprising an elastic sealing lip which has a sealing edge in engagement with a circumferential surface of a shaft which rotates relative to the shaft sealing ring, further comprising at least two sinusoidally curved helical elements having the same amplitudes and wavelengths which are provided on a sealing lip surface facing the surroundings and serve to convey medium that has escaped to the side of the surroundings back over the sealing edge to the side of the medium of the shaft sealing ring, the helical elements being arranged phase-shifted with respect to each other in circumferential direction and merging tangentially in circumferential direction into the sealing edge is characterized in that the ratio between the wavelength L and the amplitude A of the sinusoidally curved helical elements fulfills the relationship

Abstract: A shaft sealing ring, comprising an elastic sealing lip which has a sealing edge in engagement with a circumferential surface of a shaft which rotates relative to the shaft sealing ring, further comprising at least two sinusoidally curved helical elements having the same amplitudes and wavelengths which are provided on a sealing lip surface facing the surroundings and serve to convey medium that has escaped to the side of the surroundings back over the sealing edge to the side of the medium of the shaft sealing ring, the helical elements being arranged phase-shifted with respect to each other in circumferential direction and merging tangentially in circumferential direction into the sealing edge is characterized in that the ratio between the wavelength L and the amplitude A of the sinusoidally curved helical elements fulfills the relationship

Abstract: An annular shaft seal includes an elastic sealing lip which carries a twist element at its contact surface at the side exposed to air. The twist element is designed to return any liquid which may have exited to the air side back to the liquid side of the seal over the sealing edge, with both directions of rotation of the shaft. At least two sinusoidal twist ribs having the same amplitude and phase are shifted in phase position and bear snugly and tangentially against the sealing edge.

Abstract: A unitized seal includes a first seal casing having a radially-extending unitizing flange and a second seal casing having an annular elastomeric bumper. The bumper has an engagement surface which confronts the unitizing flange for engagement therewith. Upon installation of the seal, the unitizing flange compresses the bumper. Upon initial rotation of the seal, the unitizing flange slices into the bumper so as to form a labyrinth-type seal. This arrangement reduces running torque and seal lip temperature.