Control valve with two-stage shutoff and peel away opening action
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 26, 1998
Issued Date -
N/A
app pub date -
Sep 13, 1996
filing date -
Aug 24, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An inventive liquid level operated control valve which shuts off refueling with a two-stage closing operation providing an initial soft shutoff and a final shutoff. A first valve element is spring-biased within a first valve cage on the upper end of the float mechanism to seal against a primary vent outlet to provide the initial shutoff. A second valve element contained in a second valve cage within the first valve cage is coaxially arranged with the first valve element and serves to close a secondary vent outlet through the first valve element for the final shutoff. The decorking operation of the valve is improved with a dual peelaway action, in which both the first and second valve cages are configured to circumferentially peel their respective valve elements from their respective sealing positions. Additionally, the resilient seal member for the primary valve element is located on the valve body around the vent outlet to provide a positive seal while reducing the area of the resilient seal across which a tank/canister pressure differential might act to keep the valve closed when liquid levels drop.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully