Pulsed droplet ejecting system

Details Pulsed droplet ejecting system Pulsed droplet ejecting system

1974-07-12

1976-06-22

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

310 91, H01L 4108

Patent

active

039653765

ABSTRACT:
A reservoir supplies liquid through a conduit to a nozzle. The liquid is under small or zero static pressure. Surface tension at the nozzle prevents liquid flow when the system is not actuated. A section of the conduit terminating at the nozzle is designed to be capable of conducting pressure waves in the liquid from end to end of the section without the occurence of significant reflections within the section. An electroacoustic transducer is coupled to the liquid in the reflection-free section. When an electric pulse is applied to the transducer it applies a pressure pulse to the liquid sending a pressure wave to the nozzle where it causes ejection of a droplet. The pressure pulse also sends a pressure wave in the opposite direction. The system has energy absorbing means coupled to the liquid and adapted to absorb substantially all of the energy of the latter wave, thus preventing reflections which could return to the nozzle and interfere with ejection of a subsequent droplet.

REFERENCES:
patent: 3683212 (1972-08-01), Zoltan
patent: 3708798 (1973-01-01), Hildenbrand et al.

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