Propeller blade with reinforcing spars and boxes, and propeller comprising at least one such blade
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 14, 2016
Grant Date -
Jun 27, 2013
app pub date -
Dec 20, 2012
filing date -
Dec 23, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a propeller blade which comprises a hollow casing (1) forming an extrados (5) and an intrados (4) which extend from a blade shank to a free end in the direction of the span, and a framework which is arranged in the hollow casing (1) and comprises a box spar (8), having a plurality of soles (9a, 9b, 10a, 10b) in surface contact with the hollow casing (1) so as to provide structural support for the hollow casing (1), and at least two cavities (15, 16) which are spaced apart in the direction of the chord (25), wherein the propeller blade further comprises at least two reinforcing spars (6, 7) which extend between the framework and the hollow casing.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- B29C Class
- 3499 Applications Filed
- 2678 Patents Issued To-Date
- 76.54 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- B29C Class
- 27.47 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 14, 2027 |
