Patent ID: 8585059

Claim:
A sealing device mounted in an annular groove formed in one of two members that are a housing having a shaft hole and a shaft inserted into the shaft hole to seal an annular gap between the two members, the device comprising a seal ring for sliding against the other member due to relative axial movements of the two members; wherein the seal ring includes, on each of axial opposite end portions of a radially outwardly facing sliding surface sliding against the other member, a plurality of grooves extending from each end face of the seal ring toward an axial center of the sliding surface, a portion of the sliding surface being circumferentially continuous; a boundary between the grooves and the sliding surface is formed only of lines inclined with respect to a sliding direction of the sliding surface; the plurality of grooves are arranged to be adjacent to each other in a circumferential direction so that an area in which the boundary is formed of the inclined lines continues along an entire circumference of the sliding surface; and wherein the plurality of grooves are wedge-shaped grooves and provided continuously along the entire circumference of the sliding surface, such that each wedge-shaped groove transitions directly into an adjacent wedge-shaped groove at a peak along the axial end portions without intervals therebetween.