Patent ID: 11872581
Assignee: DISCO CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  H | IPC B  H

Claim 0:
1. An ultrasonic water jet apparatus that jets water to which ultrasonic vibration is propagated to a workpiece, the ultrasonic water jet apparatus comprising:
a water accumulation part in which the water supplied from a water supply source is temporarily accumulated, the water accumulation part in fluid communication with a water supply port through which the water accumulation part receives the water from the water supply;
a jet port that jets the water accumulated in the water accumulation part;
a piezoelectric vibration plate including a dome part that is disposed opposed to the jet port in the water accumulation part and propagates the ultrasonic vibration to the water accumulated in the water accumulation part, a flange part that projects outward in a radial direction from a peripheral edge of the dome part, and an annular plate that projects outward in the radial direction from a peripheral edge of the flange part; and,
a housing that supports the annular plate,
wherein a recessed surface side of the dome part of the piezoelectric vibration plate is oriented toward the jet port and an outer circumferential part of the annular plate of the piezoelectric vibration plate is supported by a sidewall of the water accumulation part and extends in the radial direction therefrom, and
the ultrasonic vibration generated from the piezoelectric vibration plate by high-frequency power supplied to the piezoelectric vibration plate is concentrated toward the jet port and the water to which the ultrasonic vibration is propagated in the water accumulation part is jetted from the jet port,
wherein the flange part is integral with the dome part and supported in the water accumulation part by the annular plate,
wherein the water supply port and the jet part are located on the recessed surface side of the dome part,
wherein an outer circumferential part of the annular plate projects inwardly in the radial direction from an inner surface of a sidewall of the housing.