Patent ID: 9539596
Date: 2017-01-10
CPC Classifications: B05B,B05C,B65D,F04B,G01F

Claim:
1. A liquid dispensing apparatus that sucks a liquid into a measuring bore and ejects the liquid in the measuring bore by moving a piston reciprocally, the liquid dispensing apparatus comprising: a liquid contact member that has first and second measuring bores; a first piston sliding in the first measuring bore in close contact therewith and a second piston sliding in the second measuring bore in close contact therewith; a supply channel communicating with a storage unit; an ejection channel communicating with a nozzle; a switching valve that is disposed in an inner space of the liquid contact member, and that has a first position at which the first measuring bore is communicated with the supply channel and the second measuring bore is communicated with the ejection channel, and a second position at which the first measuring bore is communicated with the ejection channel and the second measuring bore is communicated with the supply channel; a valve driving mechanism that operates the switching valve; a connecting member for supply, which has the supply channel therein and which is detachably attached to an upper portion of the liquid contact member and to which a storage vessel is connected; a connecting member for ejection, which has the ejection channel therein and which is detachably attached to a lower portion of the liquid contact member and to which the nozzle is connected; and a piston driving mechanism that operates an arm connected to the first and second pistons, wherein the liquid contact member is detachably attached to the liquid dispensing apparatus, the first and second measuring bores are arranged to oppose to each other on both sides of the switching valve, and the supply channel and the ejection channel are arranged adjacent to the switching valve.