초록 ▼

A syringe (10) includes a tube (12) defining a chamber (16) with a dispensing opening (18). A plunger (20) is slidably mounted in the tube and is initially positioned at the end (24) of the chamber opposite the dispensing opening. A dasher (26) having an opening (34) is positioned within the chamber

A syringe (10) includes a tube (12) defining a chamber (16) with a dispensing opening (18). A plunger (20) is slidably mounted in the tube and is initially positioned at the end (24) of the chamber opposite the dispensing opening. A dasher (26) having an opening (34) is positioned within the chamber at an intermediate point. A cylindrical barrier (40) is detachably secured to the dasher (26). Thus, with the barrier secured to the dasher, the barrier and dasher sealingly engages the tube dividing it into two subchambers (44, 46). An elongated rod (52) extends through openings (54, 56) in the plunger and the barrier and is secured to the dasher. Rotation of the rod detaches the barrier from the dasher establishing communication between the subchambers. A locking sleeve (62) frictionally secures the rod and the plunger together when the rod is moved to a retracted position (FIG. 4). Furthermore, optionally the rod is hollow (FIG. 9) and defines a third subchamber (80) containing a third liquid.

대표청구항 ▼

1. A dispensing syringe comprising:an elongated tube defining a cylindrical interior chamber having an internally threaded dispensing opening at one end of said chamber and a large opening at an other end of said chamber, a finger grip flange at the large opening of the syringe, a plunger axially sl

1. A dispensing syringe comprising:an elongated tube defining a cylindrical interior chamber having an internally threaded dispensing opening at one end of said chamber and a large opening at an other end of said chamber, a finger grip flange at the large opening of the syringe, a plunger axially slidably mounted in said tube, said plunger being positioned at the other end of said chamber, a cylindrical dasher positioned in said chamber intermediate said plunger and said dispensing opening, said dasher having at least one axial through opening, a cylindrical barrier, said barrier comprising internal threads and said dasher comprising external threads on the side of said dasher facing said plunger, wherein said barrier closes said axial through opening, said barrier together with said dasher sealingly engage said chamber thereby dividing said tube chamber into two subchambers, and said barrier is adapted to fluidly connect said subchambers, and an elongated rod, said rod secured at one end to said dasher, said rod extending through registering bores in said barrier and said plunger so that a second end of said rod extends exteriorly of said tube, and means for selectively locking said rod to said plunger when said rod retracts said barrier against said plunger.