| 摘要 |
<p>PURPOSE: A piston pump using a reduced amount of components is provided to reduce manufacturing costs by reducing processing processes and the amount of components. CONSTITUTION: A piston pump using a reduced amount of components comprises an airtight coupling end(21), a spring cage(22), and a cage unit(20). The airtight coupling unit is closely coupled to the outer surface of a piston. The spring cage is extended from the airtight coupling end and accepts a check valve for opening and closing an inner path at the front of the piston. The cage unit has one or more opening holes(23) formed in the axial direction of the spring cage.</p> |
