Gas venting valve for liquid tank
Patent
·
OSTI ID:7016770
This patent describes a gas venting valve for a liquid tank. It comprises: a valve housing defining a valve chamber with a vent opening; a valve seat surrounding the opening adjacent to the chamber; a float positioned in the chamber and including a mounting post; and a valve element carried by the float and positioned to sealingly engage the valve seat when the float is moved toward the seat by a rising liquid level in the chamber, to prevent liquid from exiting the chamber through the opening. The valve element having a hole extending therethrough for pivotably mounting the valve element on the mounting post. The valve element, the hole, and the post being dimensioned to permit the valve element to pivot freely, without bending, on the post about an axis that extends perpendicularly through the post, to cause the valve element to act like a lever and increase the effective weight of the float to overcome vapor pressure in the chamber and unseat the valve element when the liquid level falls.
- Assignee:
- GT Development Corp., Tukwila, WA
- Patent Number(s):
- A; US 4886089
- Application Number:
- PPN: US 7-200006A
- OSTI ID:
- 7016770
- Country of Publication:
- United States
- Language:
- English
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