Patent ID: 8485023
Filing Date: 2013-07-16
Classification: F04B,G01N

Abstract:
1. A solvent delivery pump comprising: a pump chamber including a sucking port for sucking a mobile phase and a discharge port for discharging the sucked mobile phase; a plunger having a tip end portion inserted into the pump chamber and reciprocating on a straight line while sliding in the solvent delivery pump for increasing and decreasing a capacity in the pump chamber; a plunger seal disposed at a portion of the pump chamber through which the plunger is inserted, the plunger seal retaining the plunger and sealing the pump chamber; a mobile phase sucking flow path having one end connected to the sucking port of the pump chamber for sucking the mobile phase into the pump chamber; a cleaning chamber provided on an opposite side of the plunger seal from the pump chamber for cleaning an outer peripheral face of the plunger with the mobile phase, through which the mobile phase flows; and a mobile phase flow path connecting a cleaning chamber flow path wherein the mobile phase flows through the cleaning chamber to the mobile phase sucking flow path.