RADIAL PISTON PUMP

摘要

PURPOSE: To substantially eliminate restriction of an axially built-in space of a compression spring by accommodating a suction valve within a transportation piston to save the space. CONSTITUTION: A thickness of a piston bottom portion 9 is determined such that a valve seat 16 and a valve body 17 are position in an inlet hole 12. A spring 6 of a transportation piston 4 for restricting reciprocating movement of the valve body 17 has a spring web 18 bent towards a spring center.