Dispensing apparatus having a perforate outlet member and a vibr

Details Dispensing apparatus having a perforate outlet member and a vibr Dispensing apparatus having a perforate outlet member and a vibr

1990-12-03

1992-10-06

Shaver, Kevin P.

Fluid sprinkling, spraying, and diffusing

With means to vibrate or jiggle discharge

By electric transducer

239 4, 12820016, 261DIG48, B05B 108

Patent

active

051524562

ABSTRACT:
Dispensing apparatus (1) comprises a housing (2) defining a chamber (3) receiving liquid (4) to be dispensed and comprising a perforate membrane which defines a front wall of the chamber. A vibrating device (8) is connected to the housing and is operable to vibrate the perforate membrane to dispense droplets of liquid through holes (25) in the perforate membrane. The housing comprises an annular member (11) having a relatively thin inner annular portion (68) connected to the perforate membrane and a relatively thick outer annular portion (66) connected to the vibrating device. The apparatus is suitable for dispensing pharmaceutical products as an atomized mist and provides a hand-held inhaler for oral inhalation.

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Review of Scientific Instruments, vol. 57, No. 11, Nov. 1986, pp. 2870-2876, American Institute of Physics; New York, US; N. Maehara et al.: "Influence of the Vibrating System of a Multipinhole-Plate Ulyrasonic Nebulizer . . . ".

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