Patent ID: 6113108
Filing Date: 2000-09-05
Classification: F16J

Abstract:
A buffer seal defining a reference axis and being adapted to be disposed in a groove of a housing to prevent high pressure from passing between the buffer seal and a shaft disposed therethrough, the buffer seal comprising:a body portion having an outer peripheral portion that is parallel with the reference axis and having a plurality of grooves defined therein parallel to the reference axis and spaced from one another about said outer peripheral portion, an inner peripheral portion, a first radial face and a second radial face;a sealing portion connected to the inner peripheral portion of the body portion, the sealing portion having a first surface perpendicular to the reference axis and spaced in an axial direction away from the first radial face of the body portion to form a shoulder, and a plurality of grooves defined in said first surface that extend radially outwardly and are spaced from one another around the first surface, and a second surface oriented at an acute angle with respect to the reference axis and the apex of the formed angle between the first and second surfaces being the closest point to the reference axis;wherein said buffer seal includes a groove defined in the inner peripheral portion of the body portion at a location adjacent to the second radial face of the body portion and the second surface of the sealing portion.