Vented Valve Cap

摘要

A fuel cap is described as having a top assembly and a bottom assembly slidably engaged with, and concentric to, the top assembly. The top assembly having a cap cover and a cylindrical cap body concentric with and protruding substantially perpendicularly from, an underside surface of the cap cover. The bottom assembly having a vacuum valve operatively coupled with a valve body. A wire-form keeper may slidably secure the bottom assembly to the top assembly. A pressure spring may impart a force that biases said bottom assembly away from said top assembly.

主权项

1. A venting apparatus comprising:
a cap cover having a cylindrical cap body concentric with, and protruding substantially perpendicularly from, an underside surface of the cap cover; a bottom assembly slidably engaged with, and concentric to, the cap cover, wherein the bottom assembly is sized and shaped to at least partially reside within the cylindrical cap body, the bottom assembly having a vacuum valve slidably engaged with a valve body,
wherein the vacuum valve and the valve body are arranged substantially concentric to one another, the vacuum valve being moveable between a first position and a second position,wherein the vacuum valve prevents flow through the valve body in the first position and permits flow through the valve body in the second position; a vacuum spring to bias the vacuum valve in the first position; and a pressure spring residing at least partially within each of the valve body portion and the cylindrical cap body, wherein the pressure spring is configured to impart a force that biases said bottom assembly away from said cap cover.