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MIXING SYRINGE

  • US 3,570,486 A
  • Filed: 10/14/1968
  • Issued: 03/16/1971
  • Est. Priority Date: 10/14/1968
  • Status: Expired due to Term
First Claim
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1. A syringe for mixing the constituents of a given composition and dispensing the same comprising:

  • a. a barrel having a dispensing outlet at a forward end thereof and being open at the rear end thereof;

    b. closure means separably mounted on the outlet end of the barrel;

    c. piston means reciprocably mounted within the barrel and defining a chamber forwardly thereof for containing one constituent of the composition;

    d. shuttle means mounted within the barrel for reciprocable movement therein;

    e. movable chamber means in said piston means for containing another constituent of the composition;

    f. said shuttle means including conduit means arranged for conjoint movement therewith;

    g. said conduit means having one end portion engaged with and projecting through a wall portion of the movable chamber means; and

    h. the other end portion the said conduit means being engaged with and projecting through the piston means;

    whereby said conduit means is in communication between the first and second mentioned chambers via said conduit means for alternately and forcibly reversing the flow of the constituents of the composition between said chambers for mixing said constituents in response to selective reciprocal movement of the shuttle means relative to the barrel and the movable chamber means; and

    whereby the composition may be dispensed from the barrel outlet upon removal of the closure means therefrom and in response to the combined forward movement of the shuttle means and the movable chamber means relative to the barrel.

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