PURPOSE: To improve the filtration efficiency by a mechanism wherein a curved grid portion is formed by arranging a plurality of columnar levers in parallel and in radial shapes while a screw on which carrying blades are studded is mounted.
CONSTITUTION: Projections 2 are installed at several locations of the end portions of both side-walls of columnar levers 1 in metal with the desired length in back- turning and projecting shapes by means of press work, and a large number of the columnar levers 1 are disposed in parallel in shapes that each projection 2 is light contacted at the upper portions while several connecting materials 3 in flexible metal are let cross at right angles with each columnar lever 1 and fastened in lateral crosspiece shapes as keeping regular intervals. When each connecting material 3 is bent in a short-cylinder shae and opening ends are fast stuck, tapered voids 4, which gradually spread outward, are formed among the facing side-walls of each columnar lever 1. A screw 7 to which carrying blades 6 are spirally studded is mounted to a cavity portion 5 made up by menas of each connecting materials 3.
YASUKAWA MASARU
YASUKAWA SOUJI
TATEISHI SHIYOUZOU
| JPS5213666B2 | 1977-04-15 |
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