Rotary kinetic fluid motors or pumps – Selectively adjustable vane or working fluid control means – Upstream of runner
Reexamination Certificate
2006-04-11
2006-04-11
Look, Edward K. (Department: 3745)
Rotary kinetic fluid motors or pumps
Selectively adjustable vane or working fluid control means
Upstream of runner
C415S001000
Reexamination Certificate
active
07025564
ABSTRACT:
An improved design for turbines increases efficiency while reducing potential for fish kill. In an embodiment of the present invention as relates to Kaplan turbines, the gap between stay vanes and their corresponding wicket gates is reduced or eliminated by provision of an extension to the trailing edge of the stay vane. In alternative embodiments, the extension may be added to the wicket gate or affixed to both in an arrangement that permits free movement of the wicket gate. To facilitate eliminating the gap altogether, the extension may be made of a pliable material or be fabricated in a telescoping or accordion arrangement to permit contact with opposing parts without damage thereto. By designing extensions using accepted hydraulic principles, a better fit of the stay vane to its associated wicket gate, and possibly to the turbines runners may be effected, further improving operational efficiency and possibly even extending maintenance intervals.
REFERENCES:
patent: 4203703 (1980-05-01), Koeller
patent: 5126584 (1992-06-01), Ouellet
patent: 5207558 (1993-05-01), Hagle et al.
patent: 5209632 (1993-05-01), Ito
patent: 5228830 (1993-07-01), Pastore
patent: 5322412 (1994-06-01), Erlach
patent: 5441384 (1995-08-01), Gokhaman
patent: 5472314 (1995-12-01), Delonge et al.
patent: 5780935 (1998-07-01), Kao
patent: 5896657 (1999-04-01), Beyer et al.
patent: 5924842 (1999-07-01), Beyer et al.
patent: 5947679 (1999-09-01), Cybularz
patent: 5954474 (1999-09-01), Fisher et al.
patent: 6007297 (1999-12-01), Buchelt
patent: 6038494 (2000-03-01), Fisher et al.
patent: 6095749 (2000-08-01), Beyer et al.
patent: 6164907 (2000-12-01), Cybularz et al.
patent: 6247893 (2001-06-01), Beyer et al.
patent: 6254339 (2001-07-01), Fisher et al.
patent: 6357389 (2002-03-01), March et al.
patent: 6402477 (2002-06-01), Cybularz et al.
patent: 6441508 (2002-08-01), Hylton
patent: 6533536 (2003-03-01), Fisher et al.
U.S. Appl. No. 60/442,551, filed Jan. 27, 2003, Wittinger.
Angerer Karl C.
Davidson Robert A.
Nichtawitz Alois
Wittinger Rodney J.
Baugher Jr. Earl H.
Hanan Devin
Look Edward K.
The United States of America as represented by the Secretary of
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