Drop dispensing device

Details Drop dispensing device Drop dispensing device

1984-12-26

1985-10-29

Hartary, Joseph W.

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222202, 222420, 239102, 310328, 310359, G01D 1518, B67D 500, B05B 1706, H01L 4104

Patent

active

045503257

ABSTRACT:
A fluid drop dispenser is fabricated from an injection moldable plastic and includes inner and outer components each having an end wall and an axially extending cylindrical wall that define a respective counterbore for each component. The inner component is assembled to the outer component with the respective outer and inner axially extending walls defining an annular fluid receiving chamber therebetween. A nozzle is provided in the outer wall through which drops are ejected on demand. A piezoelectric actuator disc is mounted within the inner component with its periphery bonded to the cylindrical wall of the inner component. When the actuator disc is electrically excited, it undergoes a radially outward expansion to cause a predetermined quantity of fluid to be ejected from the annular chamber through the nozzle.

REFERENCES:
patent: 3922622 (1975-11-01), Boyd et al.
patent: 3965376 (1976-06-01), Arndt
patent: 4068144 (1978-01-01), Toye
patent: 4326205 (1982-04-01), Fischbeck et al.
patent: 4474326 (1984-10-01), Tamahashi

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