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AssigneeSKF Industrial Trading and Development Company, B.V.
InventorsJohan C. M. Bras, Edwin H. Tummers, Syme D. Van Ballegooy, Hubertus L. M. Peek, Vedran A. Tadic, Martin B. Verburgh, Armin Olschewski
Estimating the term…
A water pump, especially for the cooling system of a combustion engine of a car, has a housing with a space for a fluid. This space contains a pump device. The pump device is mounted on a shaft which projects form the housing. The shaft rotates while being supported by a bearing assembly. The bearing assembly has an outer stationary ring mounted on the housing. The fluid space id sealed with respect to the shaft by a sealing unit having a first ring connected to the shaft, and a stationary second ring mounted on the outer ring of the bearing assembly. The first and second rings have sealing surfaces which are directed toward one another, or extend axially. The first ring is resiliently biased toward the second ring, to provide a seal therebetween. The first ring is connected to the shaft via an elastic dampening and centering element located between the inner circumference of the first ring and the outer circumference of the shaft, and distributed over the circumference of the shaft.
In a water pump having a housing with a space for fluid which contains a pump device on a shaft, the shaft projecting from the housing and being rotatably supported by a bearing assembly, the bearing assembly having a stationary outer ring on the housing, the fluid space being sealed with respect to the shaft by a sealing unit having a first ring, a second ring and means mounting the second ring to the outer ring of the bearing ring of the assembly, said first and second rings having sealing surfaces that face one another, and means for resiliently biasing the first ring in the direction of the second ring, and further comprising an inner ring having an outer circumferential surface which contacts the inner circumferential surface of said first ring and an inner circumferential surface engaging said shaft, for connecting said first ring to the shaft, the improvement wherein:
Water pump according to claim 3 in which the means for providing an interrupted contact comprises recesses distributed about he elastic ring of the dampening and centering element.
In a water pump having a housing with a space for fluid which contains a pump device on a shaft, the shaft projecting from the housing and being rotatably supported by a bearing assembly, the bearing assembly having a stationary outer ring on the housing, the fluid space being sealed with respect to the shaft by a sealing unit having a first ring, means for connecting said first ring to the shaft, a second ring and means mounting the second ring to the outer ring of the bearing ring of the assembly, said first and second rings having sealing surfaces hat face one another, and means for resiliently biasing the first ring in the direction of the second ring, the improvement wherein:
Dependencies are inferred from the claim text.