HAND POWERED LIQUID DISPENSER OF THE METERING TYPE

摘要

A hand powered liquid syringe or metering dispenser particularly for use in the veterinary medicine field comprises a pump mounted in a body having a transverse handle or grip. Standard bottles or other containers for vaccines or medicines may be mounted on a fitting secured to the body to supply the pump through a piercing tube or needle secured in the fitting. Air is supplied through the fitting to replace liquid removed from the bottle and the needle and air inlet are positioned in a manner to prevent air from being discharged from the bottle with the liquid. The pump is actuated by a squeezing action on a plunger when a handle is pressed toward the pistol grip. Check valves are provided in the inlet and outlet passages of the pump. Cannulas or other liquid discharge elements may be removed from the dispenser without requiring handling by the operator; this is accomplished by a trigger mechanism actuated by the operator's hand while he is holding the pistol grip.