Patent ID: 7156399

Claim:
A sealing device, comprising: a sealing member brought into contact with a contact surface so as to be slidable in a predetermined sliding direction, the sealing member comprising a sliding contact portion to be brought into sliding contact with the contact surface, and a plurality of recessed or protruding streaks, which are independent of one another, provided side by side in an array so as to constitute a plurality of columns, and a plurality of rows on a surface of the sliding contact portion, wherein each streak is bordered along its entire circumference by the surface of the sliding contact portion, so as to separate each streak from an adjacent streak by a space, the plurality of streaks including a plurality of recessed streaks in which a hydraulic fluid is stored or a plurality of protruding streaks around which the hydraulic fluid is stored, the recessed or protruding streaks of each of the columns being spaced side by side in the predetermined sliding direction, the columns being spaced side by side in a perpendicular direction relative to the predetermined sliding direction to form the plurality of rows, longitudinal directions of the recessed or protruding streaks of each of the rows being alternately inclined in opposite directions relative to the predetermined sliding direction, and the recessed or protruding streaks of each respective row being inclined in same directions relative to the predetermined sliding direction.