Pressure control valve for fuel tank
AssigneeNifco Inc.
InventorToshio Hattori
Life of this patent
Estimating the term…
Abstract
A pressure control valve for a fuel tank includes a valve chamber having the first communicating portion communicating with a canister and the second communicating portion communicating with the fuel tank; the first hollow valve member housed in the valve chamber to be vertically movable; and the second valve member housed in the first valve member to be vertically movable. A valve portion for closing the second communicating portion from the inside of the valve chamber and the first communicating hole passing through the valve portion are provided at a bottom of the first valve member. The second communicating hole is provided at an upper portion of the first valve member for communicating between the inside of the first valve member and the valve chamber.
Claims8
A pressure control valve, comprising:
- a valve chamber having a first communicating portion to communicate with a canister and a second communicating portion to communicate with a fuel tank,
- a first valve member having a hollow body and disposed inside the valve chamber to be movable between a lower position and an upper position, said first valve member including a first valve portion at a bottom thereof for closing the second communicating portion from an inside of the valve chamber at the lower position, a first communicating hole passing through the first valve portion, and a second communicating hole formed at an upper portion thereof for communication between the first valve member and the valve chamber, and
- a second valve member disposed inside the first valve member to be movable between a lower position and an upper position, said second valve member having a second valve portion for closing the second communicating hole from an inside of the first valve member at the upper position thereof, and means for providing a space to the second valve member so that when the second valve member is located at the lower position above the first communicating hole, an inside of the first valve member communicates with the first communicating hole.
Dependencies are inferred from the claim text.