US 2007/0181580 A1Published application

Fuel sealing structure

AssigneeSakamoto Industry Co., Ltd.

InventorsKazuhiko Kimura, Toru Mashimo, Mamoru Fukushima, Noriyuki Ohsawa, Satoshi Komada

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Abstract

To provide a fuel sealing structure capable of preventing the leakage of not only liquid fuel but also gasified fuel, an annular packing 30 is interposed between an annular sealing surface 15 on an opening part 11 of a container 20 and an annular sealing surface 25 of a closure 20. The distance between the second regions 15b, 25b of the sealing surfaces 15, 25 is shorter than that between the first regions 15a, 25a. The packing 30 includes a first sealing part 31 sandwiched between the first regions 15a,25a and a second sealing part 32 sandwiched between the 15b, 25b. The second sealing part 32 is smaller in thickness than the first sealing part 31 and the difference of the thicknesses is larger than the difference of distances between the above-mentioned regions. With the closure 20 attached, the compression ratio of the second sealing part 32 is smaller than that of the first sealing part 31.

Claims5

Dependent claims

A fuel sealing structure comprising a container for storing fuel and having an opening part, a closure attached to the opening part of said container, and an annular packing interposed in a compressed condition between an annular sealing surface of said opening part of said container and an annular sealing surface of said closure, wherein

said sealing surfaces of said container and closure each include an annular first region and an annular second region, and a distance between said second regions of said two sealing surfaces is shorter than that between said first regions,
said packing includes a first sealing part sandwiched between said first regions of said two sealing surfaces and a second sealing part sandwiched between said second regions of said two sealing surfaces, said first and second sealing parts are, in their compressed condition, interposed between said sealing surfaces, said second sealing part is smaller in thickness than said first sealing part in a natural condition, and this difference in thickness is larger than the difference between said distance between said first regions and said distance between said second regions.

Dependencies are inferred from the claim text.