Patent ID: 8069876

Claim:
A sealing bush for being inserted in a hydraulic fluid flow passage at an outer circumference of which sealing means are provided, the sealing bush comprising: an annular plastic sealing bush member having an outer circumference, an inner circumference and a rear end face; and an elevation formed on the rear end face and projecting in an axial direction of the sealing bush member, wherein the elevation is configured to be in sealing contact with a shoulder of the hydraulic fluid flow passage, the elevation is formed in an area of the inner circumference at the rear end face of the sealing bush member, the elevation in the rear end face decreases in height in the axial direction as the elevation extends from the inner circumference toward the outer circumference on the rear end face, the elevation is configured to sealingly receive an opening circumferential edge defined by the shoulder, the elevation has a frusto-conical shape and increases in axial height toward the inner circumference, and the frusto-conical elevation forms a taper tapered angle within the range of from 8Â° to 10Â° with the rear end face.