| 摘要 |
<p>A liquid pump has a pump head, a head holder which can be assembled with the pump head and a housing connected to the head holder, providing an internal space which connects to a liquid flow route through the pump head. A plunger assembly is disposed inside this internal space, having a plunger rod which penetrates the head holder and reaches the flow route, and a male screw part. A cross head for driving the plunger assembly is also inside this internal space, and a return spring is supported between the head holder and this cross head so as to provide a biasing force thereto. The cross head has a female screw part which is engageable with the male screw part of the plunger assembly. The plunger assembly has a hexagonal flange to which a dedicated simple jig can be engaged to rotate the plunger assembly and to thereby engage or disengage them. <IMAGE></p> |
