| 摘要 |
PROBLEM TO BE SOLVED: To prevent noise of a small pump and improve performance of the small pump. SOLUTION: Recess grooves 19, 19..., 20, 20..., 21, 21... or hollows 22, 22..., 23, 23... are scored on an intake valve element 8 opening and closing an intake valve part V1 of the small pump 1 or an upper surface of a rocking body 6 pressed against a back surface of the intake valve element to reduce contact area of the intake valve element 8 and the upper surface of the rocking body 6. Consequently, adhesion of the intake valve body 8 and the rocking body 6 is prevented to reduce noise at a time of open and close of the intake valve element 8. COPYRIGHT: (C)2006,JPO&NCIPI
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