Circumferential stiffeners for composite fancases
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 5, 2017
Grant Date -
Apr 24, 2014
app pub date -
Oct 23, 2012
filing date -
Oct 23, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Woven preforms, for example those used for jet aircraft engine fancases, may need additional stiffeners to improve the strength and/or dynamic performance of the preform assembly, as well as to serve as attachment points. The present invention describes several improved woven preforms that include circumferential or axial stiffeners, as well as methods of manufacturing the same. One embodiment includes circumferential stiffeners added to a woven preform. Another embodiment includes sub-preforms with integral flanges that combine to make integral stiffeners. A further embodiment includes an intermediate stiffener wrapped onto a base sub-preform wrap, wherein the intermediate stiffener wrap incorporates intermediate stiffeners. Another embodiment incorporates bifurcations in one or more layers of an outermost wrap of a multi-layer fabric composite that forms a preform, wherein the bifurcated outer wrap is folded to form stiffeners that may be oriented circumferentially or axially.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- D03D Class
- 187 Applications Filed
- 150 Patents Issued To-Date
- 80.22 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 3 Citation Count
- D03D Class
- 33.91 % this patent is cited more than
- 8 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jun 5, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 5, 2029 |
