Steep pitch helix packer
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 2, 2001
Grant Date -
N/A
app pub date -
Mar 10, 2000
filing date -
Mar 12, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A seal element is provided which comprises inner and outer, concentric, radially spaced apart, tubular helical cages. Each cage is formed by a plurality of helically parallel steel coils joined at their upper and lower ends by integral sleeves. A nitrite bladder is positioned between the cages. The seal element can be expanded by supporting its base and applying compressive load.
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