Seal arrangement for flap valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 2, 1989
Grant Date -
N/A
app pub date -
Aug 5, 1988
filing date -
Aug 17, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a flap valve, a casing is provided forming a flow opening through the valve. A flap is pivotally mounted in the casing for closing the flow opening. The casing is formed of two annular parts secured together by bolts. The two casing parts have a plane of contact with a seal secured between the two parts and extending around the opening in the plane of contact. The seal includes a pair of spaced rings with arcuately shaped seal members extending between and interconnecting the rings. Each seal member has an circumferentially extending closed hollow space forming an air cushion. When the flap is placed in the closed position in the flow opening, a slight torsional moment is executed against the seal which is formed of a wear-resistant material so that a good sealing effect is obtained.
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