Continuous low flow rate fluid dispenser

Claim 1

A syringe device for delivery of the contents thereof at a slow, uniform rate comprising: a syringe including: a barrel member defining a substantially tubular chamber having an internal wall portion and a nozzle portion; a plunger member having a sealing member secured thereto at one end and an engagement portion at the other, said sealing member in slidable engagement with said internal wall portion and said plunger member positioned for reciprocal movement in and out of said barrel member; engagement surfaces extending from said barrel member; a syringe carrier member including: an abutment member for contact with said engagement portion of said plunger member; a driver member constructed and arranged for contact with said engagement surfaces of said barrel member opposite said abutment member; two oppositely positioned guide means slidably associated with said driver member and extending longitudinally of said barrel member; two oppositely positioned negator biasing means operatively extending between said driver member and said carrier abutment member; control means of the fluid passage type defined by a variable restrictor operatively associated with said nozzle portion; and a length of tubing extending from said control means opposite said nozzle portion; whereby upon placement of a portion of said plunger member out of said syringe barrel and movement of said carrier abutment member away from said driver member said biasing means will be placed under tension; placement of said syringe in said syringe carrier member and upon closing of said control means, said fluid material will be retained in said syringe barrel, and upon opening of said control means, said carrier driver member and said carrier abutment surface will be forced in opposing directions to thereby move said plunger sealing member toward said nozzle portion to expel said fluid material from said barrel member and out through said tubing at a slow steady rate.