Valve device
AssigneePiolax, Inc.
InventorKosei YAMAGUCHI
Life of this patent
Estimating the term…
Abstract
One embodiment relates to a valve device. The valve device includes: a valve case; a valve element slidably disposed within a valve chamber defined in the valve case; and a positive pressure spring configured to urge the valve element toward a valve seat in the valve case. The valve element includes an outer circumferential portion having a predetermined length extending along an inner circumference of the valve chamber. The outer circumferential portion includes plural opening portions. And, ribs project from the inner circumference of the valve chamber to enter into the opening portions, thereby limiting movement of the positive pressure spring in a radial direction.
Claims4
A valve device comprising:
- a valve case comprising:
- a first flow port defined on one end side of the valve case, the first flow port to be communicated with an inside of a fuel tank;
- a second flow port defined on the other end side of the valve case, the second flow port to be communicated with an outside of the fuel tank;
- a valve chamber defined inside the valve case;
- and
- a valve seat formed on an opening portion which communicates with the first flow port;
- a valve element slidably disposed in the valve chamber of the valve case, and comprising:
- a sealing portion configured to abut on and separate from the valve seat;
- and
- an outer circumferential portion having a predetermined length extending along an inner circumference of the valve chamber;
- and
- a positive pressure spring inserted into an inner side of the outer circumferential portion of the valve element, disposed to abut on the valve element at an one end thereof while abutting on the other end side of the valve case at the other end thereof, and configured to urge the valve element toward the valve seat of the valve case,
- wherein the outer circumferential portion of the valve element comprises plural opening portions formed to extend in an axial direction of the outer circumferential portion, and disposed at predetermined intervals in a circumferential direction of the outer circumferential portion, and
- wherein the valve chamber of the valve case comprises ribs formed on the inner circumference of the valve chamber to project therefrom in a radial inner direction of the valve case, and disposed to each pass through the opening portions of the valve element to thereby limit movement of the positive pressure spring in a radial direction.
Dependencies are inferred from the claim text.