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D736893 | Iwamoto | Aug 2015 | S |
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20050223707 | Ikeda et al. | Oct 2005 | A1 |
20060283503 | McCausland | Dec 2006 | A1 |
20090214787 | Wei et al. | Aug 2009 | A1 |
20130336776 | Siddle et al. | Dec 2013 | A1 |
20140361208 | Tsuji et al. | Dec 2014 | A1 |
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Entry |
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“Toshiba—Preventive Maintenance of Major Steam Valves, Rehabilitation and Repairing” available at http://www.toshiba.co.jp/thermal-hydro/en/therrnal/service/turbines/valves.htm, 2 pages, available prior to Oct. 14, 2015. |
Illustrations of prior art valve configurations, 1 page, believed to be available prior to Oct. 14, 2015. |