Fts Co., Ltd.

Tatsutoshi Takashima

Teijiro Goto

Koji Sugiura

Yojiro Iriyama

The present invention is directed to an opening structure of a fuel tank having a fuel tank wall made of plastic layers including at least an outer layer, an inner layer and an intermediate layer, with an opening portion formed to be integral with the fuel tank wall. The opening structure includes a cylindrical portion extended from the fuel tank wall outward thereof to form the opening portion, an overlapping portion extended from an end of the cylindrical portion to enlarge the diameter of the opening portion and bent at a bent portion to form an outer surface parallel with an opening end surface of the opening portion, and a compressed portion with at least a portion of the overlapping portion compressed in a direction perpendicular to the opening end surface of the opening portion. The opening structure further includes an annular member disposed around the opening portion to be in contact with the overlapping portion and the cylindrical portion, and at least a recessed portion for receiving therein a part of the outer layer to be integrally connected with the opening portion. The annular member has a step portion formed inward of the annular member in a radial direction thereof to contact with at least the compressed portion.

Growing community of inventors

Toyota, Japan

Tatsutoshi Takashima