Piezoelectric device for detecting stoppage of a nozzle

Details Piezoelectric device for detecting stoppage of a nozzle Piezoelectric device for detecting stoppage of a nozzle

1984-06-29

1985-12-03

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310319, 310323, 23953315, 239DIG14, 239DIG17, H01L 4108, B05B 130

Patent

active

045568154

ABSTRACT:
A piezo-electric transducer type pressure sensor such as a silicon pressure sensor or the like is provided in a low path of fluid located in the midway between a valve section and a nozzle ejection port in a fluid ejection gun. When foreign matters in the fluid block the nozzle and hence the ejection from the nozzle becomes an abnormal condition, a fluid pressure variation produced in the flow path between the valve section and the nozzle ejection port is detected in the form of an electric signal by means of the piezo-electric transducer type pressure sensor.

REFERENCES:
patent: 3387607 (1968-06-01), Gauthier et al.
patent: 3828773 (1974-08-01), Buch
patent: 3832579 (1974-08-01), Arndt
patent: 3893627 (1975-07-01), Siczek
patent: 4123761 (1978-10-01), Kimura
patent: 4300131 (1981-11-01), Mitsui et al.
patent: 4313569 (1982-02-01), Burke

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