| 摘要 |
PURPOSE: To simplify a structure and to reduce a manufacturing cost and a material cost by providing the outside seal lip part and the inside dynamic seal lip part, and arranging the deformation preventive support part composed of annular elastomer held by a bushing in a cylinder. CONSTITUTION: The slightly expansively opening outside end part 35 having the annular step part 36 is arranged in a bushing 30. An elastomer static and dynamic seal 50 with a girder spring is installed in the inside end part of the busing 30. An outward general V-shaped annular groove 52 is arranged in the inside end part of the bushing for installation so that a part of main body of the seal 50 is received/supported by this. The inward tapered conical wall part 55 is formed on the inside end of the bushing 30. The wall part 55 forms the deformation preventive support part of the dynamic seal part 58 inside of the seal 50. The dynamic seal part 58 is held by the girder spring 60 received/ supported by an outward groove of the seal. |
