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Spring driven adjustable oral syringe

  • US 8,449,499 B2
  • Filed: 10/24/2011
  • Issued: 05/28/2013
  • Est. Priority Date: 01/08/2008
  • Status: Active Grant
First Claim
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1. A method for selecting a dose of medication, the method comprising:

  • compressing a plunger assembly into a barrel assembly, wherein the plunger assembly includes a shaft having a distal end and a proximal end;

    rotating the plunger assembly within the barrel assembly to select a dosage by viewing visual indicia indicative of the dosage;

    inserting the barrel assembly into a fluid;

    releasing the plunger assembly such that a force producing element produces a force on the plunger assembly;

    the force producing element extracting the plunger assembly from the barrel assembly until a radial rib contacts a detent on a barrel cap assembly, wherein the radial rib is disposed between two or more lengthwise ribs;

    wherein the radial rib is disposed in at least one portion of a circumference of the shaft, but not extending along a full circumference of the shaft; and

    wherein the radial rib is disposed lengthwise on the shaft between the distal end and the proximal end of the shaft to provide a predetermined volume of the fluid in the barrel assembly when the radial rib contacts the barrel cap assembly; and

    siphoning the fluid into the barrel assembly as the plunger assembly is extracted.

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