Number | Name | Date | Kind |
---|---|---|---|
1142723 | Merritt | Jun 1915 | |
2889852 | Dunlap | Jun 1959 | |
3131706 | Harban | May 1964 | |
3414007 | DeMarco | Dec 1968 | |
3488032 | Scott | Jan 1970 | |
4089735 | Sussmann | May 1978 | |
4516606 | Worley | May 1985 | |
4790920 | Krzanich | Dec 1988 | |
4899685 | Kawakami | Feb 1990 | |
4899686 | Toshima et al. | Feb 1990 |
Entry |
---|
"Fishtail vs. Conventional Discs in Butterfly Valves", Carl D. Wilson, Instruments & Control Systems, vol. 41; Mar. 1968. |
"The Note on the Reduction of the Fluid Dynamic Torque of Butterfly Valves", D. W. Bryer/D. E. Walshe, National Physical Laboratory; Sep. 1986. |