Check valve and fuel tank utilizing the same

摘要

A check valve (32) includes a cylindrical body (32) and a valve plate (32) attached to one end of the body (32) to open and close a flow outlet. A stepped seat element (36a) having a seat surface (36a) is formed along the periphery of the flow outlet of the body (40). The valve plate (40) is press-cut from a thin stainless steel plate to be integrally formed as a leaf spring. The valve plate includes a leaf element movable with respect to the seat surface so as to close and open the flow outlet, an arm element (41) coupled to the leaf element (41) via a joint element, and a base element connected to the arm element and received by a valve support projection on the cylindrical body.