| 摘要 |
1,181,392. Water filter. SIMONACCO Ltd. 7 March, 1967 [21 March, 1966], No. 10571/ 67. Heading B1D. Water is filtered by passage horizontally from inlet chambers 3, 4 to outlet chambers 16, 17, 18 through downwardly moving columns of sand, the sand being continuously lifted up pipe 28, by injecting air through screen or valve 32, and delivered to the open top of container 2, from which it descends down constriction 23. The water is delivered from an overhead tank, so some water rises up constriction 23, washing the sand clean and leaving the container through outlet 26. The side walls of chambers 3, 4 consist of inclined plates, and the walls of chambers 16, 17, 18 are perforated, and may be covered with cloth, to exclude the sand. |
