Patent ID: 8262179

Claim:
A liquid material discharge device comprising: a liquid material supply section for supplying a liquid material to be discharged; a discharge section having a nozzle for discharging the liquid material; a body having a space formed therein as a hole or bore extending from a side surface of the body, a first channel, opening to the space, to constitute a measurement hole, a second channel, opening to the space, for interconnecting the space and the liquid material supply section and a nozzle connecting portion formed in a lower portion of the body for attaching the nozzle; a plunger to slide along an inner wall surface of the first channel to suck and discharge the liquid material into and from the first channel; a rotary valve member which is formed with a third channel for interconnecting the first channel and second channel and with a through hole penetrating the rotary valve member for interconnecting the first channel and the discharge section, the third channel being a recessed groove formed in a surface of the rotary valve member; and control section for controlling the aforesaid sections, wherein the rotary valve member is fitted in the space, wherein no close contact pressure is externally applied to the valve member, wherein when the liquid material is sucked into the measurement hole, the control section controls the rotary valve member to be located at a first position to interconnect the liquid material supply section and the measurement hole and to interrupt the interconnection between the measurement hole and the discharge section, wherein when the liquid material in the measurement hole is discharged, the control section controls the rotary valve member to be located at a second position to interconnect the measurement hole and the discharge section and to interrupt the interconnection between the liquid material supply section and the measurement hole, and wherein the control section rotates the rotary valve member through a predetermined angle such that the rotary valve member is selectively shifted to the first position or the second position.