US 6,470,911 B2 · Check valve and fuel tank with check valve attached thereto

Abstract

A check valve attached to an inner wall of a main body of a fuel tank ensures a sufficient seal of the main body from outside, without increasing the required number of parts. The check valve communicates with a fuel conduit of a fuel inlet pipe and functions to prevent liquid fuel and fuel vapor in the main body from flowing through the fuel inlet pipe and being released to the outside. The check valve is opened by a flow of fuel in the fuel inlet pipe and allows the flow of fuel to be introduced into the main body. The check valve includes a casing with a fuel outlet, a valve disc, and a fixation plate. The valve disc is movable between an open position and a closed position to open and close the fuel outlet of the casing. The fixation plate has one end inserted in an end of the casing and the other end welded to the main body. This arrangement enables the main body to be securely sealed from the outside.

Claims6

Dependent claims

A check valve attached to an inner wall of a main body of a fuel tank, said check valve comprising:

a casing having a fuel inlet and fuel outlet through which a supply of fuel is ejected from said valve casing to said main body;
a valve disc for opening said fuel outlet only when sufficient fuel pressure is applied to said valve disc from said fuel inlet;
and
a fixation plate surrounding said casing and having said inner end and an outer end for hermetically sealing the main body, the inner end being inserted through insert molding into an end of said casing, said outer end being arranged to be welded to said inner wall of said main body.

1 more element

Dependencies are inferred from the claim text.

Check valve and fuel tank with check valve attached thereto

Life of this patent

Check valve and fuel tank with check valve attached thereto

Life of this patent

Abstract

Claims6