PURPOSE: To provide a pump with less pulsation and easy discharge control using a simple construction by installing a resilient plate at the tip of a horn- shaped ultrasonic vibrator having a liquid supply hole, and mounting the resilient plate at the liquid inlet of a pressurization vessel.
CONSTITUTION: In this horn-shaped ultrasonic vibrator, an electrode plate 9 is nipped by two piezo elements 8, 8, which are at both sides nipped by a metal member 7 and a horn 7' connected therewith electrically. Here a resilient plate 5 is installed at the tip of the horn 7. This resilient plate 5 is mounted at the liquid inlet 15 of a pressurization vessel 1 through a support 4 by the use of a resilient pushing member 6. If AC voltage is impressed on the electrode and metal member 7 through leads 10, 10', respectively, the resilient plate 5 vibrates bendingly, and the liquid is exhausted out of a liquid supply hole 11 through a pressurization chamber 2 from a discharge hole 3. The amount of discharge is controlled by adjusting the impressed voltage.
ASHIZAWA TORANOSUKE
KOBAYASHI MASARU
