Fuel cutoff valve
AssigneeToyoda Gosei Co., Ltd.
InventorsHiroshi Nishi, Hiroaki Kito
Life of this patent
Estimating the term…
Abstract
In a fuel cutoff valve 10, a casing 30 including a valve chest 33 is fastened to a cover member 20 thermally welded to an upper tank wall FTa of a fuel tank FT. A float 50 is located in the valve chest 33 of the casing 30. The casing 30 has bottomed recesses 42 formed as concaves in an outer circumferential wall of the valve chest 33, and vent holes 40 provided at respective bottom areas of the bottomed recesses 42. Each of the vent holes 40 is a through hole of a small diameter, which is determined to be sufficient for ventilation of the fuel vapor in the valve chest 33. The vent hole 40 has a short dimension by the depth of the bottomed recess 42.
Claims5
A fuel cutoff valve attached to an upper portion of a fuel tank and configured to open and close a connection conduit of connecting the fuel tank with outside by down and up motions of a float and thereby connect and disconnect the fuel tank with and from the outside, the fuel cutoff valve comprising:
- a cover member welded to an upper wall face of the fuel tank;
- and
- a casing fastened to the cover member and designed to form a valve chest of connecting the fuel tank with the connection conduit and receiving the float therein,
- wherein the casing has a bottomed recess formed as a concave in an outer circumferential wall of the valve chest, and a vent hole formed in a bottom area of the bottomed recess to have a smaller diameter than a diameter of the bottom area of the bottomed recess and to ventilate the valve chest to the fuel tank.
Dependencies are inferred from the claim text.