Aktiebolaget Skf

Juergen Netzer

Juergen Kurth

Willy Seewald

Helmut Benedix

Andreas Herbert Kraus

Christoph Passow

Bernd Walter Norbert Naujoks

A rolling-element bearing for a device lubricated with a fluid includes first and second bearing rings defining an interior therebetween in which rolling elements support the first ring for rotation relative to the second ring. A pumping device is located at the interior for pumping the fluid into and/or out of the interior when an element of the rolling-element bearing rotates and the rolling-element bearing is at least partially submerged in the fluid. The pumping device may be a ring having vanes that is attached to the first bearing ring or to a cage of the bearing.

Rolling-element bearing

A sealing lip seals a first space from a second space with respect to a liquid medium present in the first space. The sealing lip has abutment surface configured to abut on a sealing surface of a component that is movable relative to the sealing lip along a direction of movement. A groove is defined in the abutment surface and pumps any liquid medium present in the groove towards the first space along the direction of movement. The groove extends completely within the abutment surface and is enclosed by the abutment surface, such that it does not intersect either lateral edge of the sealing lip.

Sealing lip and seal

A seal includes a sealing lip having a sealing region with a pumping structure that can abut on a first component. The pumping structure causes a liquid medium to move in a direction from a first axial side of the seal towards or to a second axial side of the seal when the first component rotates relative to a second component. The pumping structure includes at least one pumping groove that extends along a direction of extension and at least one retaining structure disposed in the at least one pumping groove. The at least one retaining structure reduces a cross-section of the at least one pumping groove, in at least one direction perpendicular to the direction of extension, to a value of between 50% and 90% of an extension of the cross-section of the pumping groove outside the at least one retaining structure along the at least one direction.

Seal and method for manufacturing thereof

A valve stem seal () seals a valve stem () that is reciprocally movable in an axial direction. The valve stem seal includes a base body () that is connectable with a valve stem guide (). A first seal lip () is resiliently positioned relative to the base body via an elastic connection () and seals the valve stem relative to an oil chamber (). A second seal lip () is spaced in the axial direction () from the first seal lip and seals the valve stem relative to a gas chamber. The second seal lip is also resiliently positioned relative to the base body via the elastic connection.

Growing community of inventors

Burscheid, Germany

Juergen Netzer