Syringe adaptor assembly

Claim 1

A connector for attachment of a syringe to a dispenser adapted to provide measured quantities of pressured gas to said syringe to displace the contents of said syringe in measured drops, said syringe having a filling end having at least two oppositely disposed external flanged projections and a dispensing end having a small aperture, said connector comprising a flexible conduit having a dispenser end and a syringe end, means at said dispenser end for attachment of said conduit to said dispenser, an externally threaded tubular member having a flexible conduit end and a syringe end and connected at said flexible conduit end to said syringe end of said flexible conduit, a syringe retainer member having (1) a collar having centrally disposed apertures loosely fitted about said externally threaded tubular member, (2) oppositely disposed channels for engaging the external flanged projections on said syringe, and (3) a stopper member affixed externally to the syringe end of said externally threaded tubular member, a knurled ring within said collar having an internally threaded aperture threadingly engaged upon said externally threaded tubular member at a portion thereof between said dispenser end and said syringe end, said stopper member having a cylindrical end portion sized to fit loosely within said filling end of said syringe and a sealing flange attached to said cylindrical end portion, said stopper member being movable relative to said retainer member upon rotation of said knurled ring whereby said sealing flange may be moved into and out of sealing engagement with the filling end of said syringe.