US 4,364,388 AGranted

Syringe dispensing apparatus

OwnerJerry E. Cechinventor

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Abstract

The syringe dispensing apparatus of this invention is adapted to dispense fluid under pressure from or vacuum fill a conventional plastic disposable syringe having a cylindrical reservoir and a piston plunger having an elongated body portion, generally cruciform in cross-section with radially extending vanes. The dispensing apparatus includes a hand operated ratchet mechanism and a supporting alignment collar which is received around the syringe reservoir, at the open end. The collar has a transverse flange including a slot which receives one of the vanes of the plunger, which aligns the ratchet mechanism on the syringe. The ratchet mechanism includes a pair of handles releasably attached to the opposed ends of the collar and a sharp detent which digs into and grips one of the opposed aligned vanes of the plunger, to telescope the plunger into the syringe reservoir and dispense a metered volume of fluid through the restricted syringe outlet.

Claims9

Dependent claims

A metering dispensing apparatus for a conventional plastic syringe, said syringe having a tubular cylindrical fluid reservoir having an open end and termination in a restricted dispensing outlet, said syringe having a reciprocal plunger including a resilient cylindrical piston telescopically received in said reservoir through said open end for dispensing fluids through said restricted reservoir outlet, said plunger having an elongated radially projecting portion, said dispensing apparatus comprising a retainer collar having an elongated flexible strap portion receivable around said syringe reservoir adjacent said open end and a hand operated ratchet mechanism attachable to said collar, said hand ratchet mechanism including a fixed handle releasably attached to said collar strap portion, a spring biased movable handle pivotally attached to said fixed handle intermediate its ends and a spring biased ratchet means including a detent having a sharp edge pivotally supported on the free end of said movable handle adjacent said syringe plunger, and an alignment means on said strap portion aligning said radially projecting portion of said plunger with said detent, said ratchet means detent adapted to releasably grip said plunger radially projecting portion upon pivotal movement of said movable handle telescoping said plunger into said reservoir and dispensing fluids through said restricted reservoir opening.

The dispensing apparatus for a conventional plastic syringe, said syringe including a cylindrical fluid reservoir having an open end portion and a restricted outlet, a plunger telescopically received in said reservoir, through said open end having a resilient cylindrical piston end portion and an elongated body portion, said plunger body portion having a plurality of radial vanes, said dispensing apparatus comprising a collar including an elongated resilient strap portion receivable around said cylindrical reservoir portion, adjacent said open end, and said collar having an alignment means releasably attachable to one of said plunger body portion vanes aligning said collar relative to said plunger vanes, and a hand operated ratchet means, said ratchet means including a fixed handle releasably attached to the opposed ends of said collar strap portion, a movable handle pivotally attached to said fixed handle intermediate its ends and a spring biased ratchet means, said ratchet means including a detent pivotally supported on the free end of said movable handle opposite said syringe plunger, said detent aligned with one of said plunger body vanes by said collar alignment means, said detent having a sharp edge adapted to dig into said one vane upon pivotal movement of said movable handle, telescoping said plunger into said reservoir and disposing fluid through said restricted reservoir opening.

Dependencies are inferred from the claim text.