Patent ID: 6783130
Filing Date: 2004-08-31
Classification: F16J

Abstract:
A seal mechanism, comprising a retaining member having a cylindrical portion configured for mounting the seal mechanism on a body and an annular surface portion for receiving pressure of a pressurized fluid by cooperation with a sealing member, the annular surface portion having an inner periphery facing a sealing surface spaced therefrom with a gap at an innermost peripheral portion thereof, and a flexible member molded in one piece with the retaining member and having a flexible tip to perform a sealing function such that under the pressure of the pressurized fluid the flexible member is pushed against a pressurized-fluid side surface of the annular surface portion including an edge portion of the retaining member, wherein the retaining member is provided with a stress reduction mechanism only in a corner thereof; for reducing the stress generated in said flexible member the corner having a predetermined radius and being located within said flexible member at a side thereof to which the pressure of the pressurized fluid is applied to the sealing member, and the edge portion is formed at a side subjected to a lower pressure than the pressure side.