Abstract: A seal member includes an annular fitting part and an annular dust lip. The fitting part fits on an inner circumference of a tubular member. The dust lip extends from the fitting part toward a side opposite from the tubular member such that a diameter of an inner circumference of the dust lip gradually decreases, and a distal end portion of the dust lip slides on an outer circumferential surface of a shaft member. A metal insert includes a reinforcing ring and a reinforcing extension piece. The reinforcing ring stands along the inner circumference of the tubular member. The reinforcing extension piece extends from the reinforcing ring toward a side opposite from the tubular member, and inclines such that a distal end of the reinforcing extension piece approaches the shaft member. The reinforcing ring is arranged in the fitting part, whereas the reinforcing extension piece is arranged in the dust lip.

Abstract: A seal device includes an annular seal main body; a lip part that has a main lip and a sub lip, the main lip and the sub lip being provided so as to be aligned in an axial direction on the inside of the seal main body; and an annular biasing member provided on an outer periphery of the lip part, the annular biasing member being configured to press both the main lip and the sub lip to a member from the outer periphery in a radial direction, wherein the biasing member has a length in the axial direction such that the biasing member is configured to press both a distal end site of the main lip and a distal end site of the sub lip from the outer periphery in the radial direction.

Abstract: A sealing device for sealing between a tube member and an axial member movably inserted into the tube member includes a dust seal held on an opening end part of the tube member and including an annular dust seal lip held in sliding contact with the outer peripheral surface of the axial member, and a scraper arranged at an inner side of the dust seal and including an annular lip portion slidably pressed into contact with the outer peripheral surface of the axial member. The hardness of the lip portion is set to be higher than that of the dust seal lip.

Abstract: A seal member includes an annular fitting part and an annular dust lip. The fitting part fits on an inner circumference of a tubular member. The dust lip extends from the fitting part toward a side opposite from the tubular member such that a diameter of an inner circumference of the dust lip gradually decreases, and a distal end portion of the dust lip slides on an outer circumferential surface of a shaft member. A metal insert includes a reinforcing ring and a reinforcing extension piece. The reinforcing ring stands along the inner circumference of the tubular member. The reinforcing extension piece extends from the reinforcing ring toward a side opposite from the tubular member, and inclines such that a distal end of the reinforcing extension piece approaches the shaft member. The reinforcing ring is arranged in the fitting part, whereas the reinforcing extension piece is arranged in the dust lip.

Abstract: A sealing device for sealing between a tube member and an axial member movably inserted into the tube member includes a dust seal held on an opening end part of the tube member and including an annular dust seal lip held in sliding contact with the outer peripheral surface of the axial member, and a scraper arranged at an inner side of the dust seal and including an annular lip portion slidably pressed into contact with the outer peripheral surface of the axial member. The hardness of the lip portion is set to be higher than that of the dust seal lip.