Francis turbine and method of operating same
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United States of America Patent
Stats
-
Jun 8, 2021
Grant Date -
Jul 18, 2019
app pub date -
Jun 14, 2017
filing date -
Aug 8, 2016
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A Francis turbine includes a waterway, an impeller disposed in the waterway, a distributor apparatus disposed in the waterway and an additional element for adjusting the flow of water through the turbine. The additional element is disposed in the waterway upstream of the impeller in the water flow direction, and the additional element includes a perforated metal sheet that may be brought into the waterway. A method for operating such a turbine is also provided.
First Claim
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International Classification(s)
- 2017 Application Filing Year
- F03B Class
- 257 Applications Filed
- 163 Patents Issued To-Date
- 63.43 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F03B Class
- 0 % this patent is cited more than
- 4 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Dec 8, 2024 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Dec 8, 2028 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Dec 8, 2032 |
