| 摘要 |
PURPOSE:To fully ensure sealing quality, by forming a packing case, with a built-in packing, to the end of a crescent seal, forming rugged surfaces on the bottom face of said case and a flange face, at a face-to-face position to said bottom face, and press contacting these bottom and flange faces. CONSTITUTION:There are formed a flat face 8 in the periphery of a packing case 7, formed to the end of a crescent seal 4, while a rugged face 9 on the bottom face. And a rugged face 10 is similarly formed to the prescribed surface of a flange 2 in a body (a) at a face-to-face position to said rugged face 9. And then, a packing 11 is placed in the packing case 7, if a cover 1 is press contacted closely to the flange 2, ruggedness of the faces 9, 10 bite the packing 11, then the end of the crescent seal 4 is surely fixed to the flange 2, also the flat face 8 is press contacted to the flange 2. In this way, the press contacted part fully holds sealing quality, then an oil leak can be prevented. |
