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Syringe for the delivery of viscous compositions

  • US 9,539,042 B2
  • Filed: 03/28/2008
  • Issued: 01/10/2017
  • Est. Priority Date: 03/30/2007
  • Status: Active Grant
First Claim
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1. A device for the delivery of a composition, the device comprising:

  • (a) an elongate chamber having a lumen;

    (b) a cap on the proximal end of the chamber having a restricted opening, the cap covering at least a portion of the lumen of the chamber;

    (c) at least one side port having a lumen, said side port lumen being in fluid communication with the lumen of the elongate chamber; and

    (d) a plunger having a plunger seal slidable in sealing engagement within the lumen of the elongate chamber from a position proximal to conjunction of the lumens of the side port and elongate chamber to a position distal to said conjunction;

    (e) the plunger having an interference member that inhibits removal of the plunger from the elongate chamber through the restricted opening; and

    (f) the elongate chamber having a locking structure that is engageable and disengageable with a corresponding locking structure on the plunger, wherein engagement between the locking structures of the elongate chamber and the plunger locks the plunger and its plunger seal relative to the elongate chamber, and disengagement between the locking structures of the elongate chamber and the plunger unlocks the plunger and its plunger seal relative to the elongate chamber so that the plunger and its plunger seal are movable within the elongate chamber.

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