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Method and mechanical, electrical, or electronic apparatus for dispensing, issuing, or diffusing medicines, fragrances or other liquid or visous substances in the liquid phase or in the gaseous phase

  • US 5,221,025 A
  • Filed: 05/24/1990
  • Issued: 06/22/1993
  • Est. Priority Date: 05/31/1989
  • Status: Expired due to Fees
First Claim
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1. A method of dispensing, issuing, or diffusing a liquid from a dispenser which expels liquid through a nozzle of a spray pump which has a liquid delivery piston, the method comprising the steps of:

  • providing the pump, said pump being fluidly coupled to the liquid to be sprayed;

    providing a mechanical means for actuating the pump so as to expel the liquid, said mechanical means comprising a plunger controlled by a solenoid, wherein said plunger is adapted to contact the pump and is disposed a predetermined distance d away from the pump, said predetermined distance d being in the range of about 0.5 to 1.0 times the stroke of the pump; and

    actuating said mechanical means so as to permit said mechanical means to accelerate through said predetermined distance d prior to engaging and actuating the pump thereby producing a spray in which the particles of fractionated liquid are not greater than about 45 microns in diameter, depending on the surface tension of the expelled liquid, so as to substantially simulate the fine spraying characteristics achieved by an aerosol.

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