| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify the structure of an inlet valve, and downsize a piston pump. SOLUTION: A piston 16 is composed as a hollow piston, while its inner space serves as a push-away chamber 22 of a piston pump 10. A check valve 28 has a valve hole 30 formed in the piston 16 and a strip-like valve closing body 32 attached to the piston 16. The closing body which covers the valve hole 30, is made of spring elastic material and forms a valve spring element.</p> |
