| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter whose inlet side pressure can be released even when the filter is clogged, whose clogged state can be recognized easily and whose structure is made simple and improved and to provide a suction apparatus which is provided with the improved filter and in which a failure such as damage is prevented. SOLUTION: This filter (2) is provided with a cylindrical filter member (4) whose both ends are opened, a filter support (6) which supports one opened end of the member (4) and has an inflow port of a fluid communicated with the inside of the member (4), a cover (8) for opening or closing the other opened end of the member (4) freely and a pressing means (10) for pressing the cover (8) to the direction to close the cover (8).
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