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Apparatus and method for dispensing small quantities of particles

  • US 6,987,228 B1
  • Filed: 11/03/2000
  • Issued: 01/17/2006
  • Est. Priority Date: 11/05/1999
  • Status: Expired due to Term
First Claim
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1. Apparatus for dispensing particles, comprising:

  • a particle retainer for retaining a supply of the particles to be dispensed, said particle retainer having a plurality of apertures arranged to be clogged by the particles and to be unclogged for dispensing therethrough of said particles;

    a particle release actuator responsive to an actuation signal and arranged to vibrate the particle retainer in order to unclog said apertures so as to enable some of said supply of particles to be dispensed from said particle retainer through said unclogged apertures; and

    a weight measuring device for measuring the apparent weight of particles dispensed from said particle retainer and for outputting a signal representing the measured apparent weight.

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