| 摘要 |
PROBLEM TO BE SOLVED: To provide a gasket GS mounted on a fuel cap 10, capable of obtaining a high sealing face pressure even by a small compression force. SOLUTION: This gasket GS is mounted between a seal face FNf of a pouring port FNb and a seal holding part 24 of the cap for sealing therebetween. A gasket main body GSa is provided with projected first and second pipe-side sealing parts GSd1, GSd2 kept into contact with the sealing face FNf, and projected first and second main body-side sealing parts GSe1, GSe2 kept into contact with a seal holding part 24. The first pipe-side sealing part GSd1 is projected at a lower end in the axial direction of the gasket main body GSa and pressed to the sealing face FNf in an initial period of the fastening, and the second pipe-side sealing part GSd2 is projected to be pressed to the sealing face FNf with the sealing face pressure larger than that of the first pipe-side sealing part GSd1 after the passage of the initial fastening period. COPYRIGHT: (C)2005,JPO&NCIPI
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