Patent ID: 6164928
Filing Date: 2000-12-26
Classification: F04B,F04C

Abstract:
A pump for supplying a fluid comprising:a pump housing with an interior and a sealing face defining the housing interior;a drive shaft extending into the interior of the pump housing with a radial gap defined between the housing and the shaft;at least one bearing device in the housing and on which the drive shaft is mounted, and the bearing device is lubricated by a leakage flow of fluid;a sealing device sealing the gap between the housing of the pump and the drive shaft, the sealing device comprising a sealing ring of substantially U-shape cross-section having an exterior surface, having one arm of the U forming a first sealing portion and resting against the drive shaft under pre-stress and having another arm of the U forming a further sealing portion and resting under pre-stress against the sealing face of the housing and surrounding the drive shaft, the sealing ring having a sealing area connecting the first and second sealing portions and forming the base of the U and having an exterior corresponding to the exterior of the sealing ring, the U being oriented so that the exterior of the sealing area faces the interior of the pump housing and the sealing portions extend from the sealing area in a direction away from the interior of the pump.