Patent ID: 8062254

Claim:
A syringe, the syringe comprising: a barrel assembly, the barrel assembly comprising: a barrel having a distal end and a proximal end, a nozzle formed on the distal end of the barrel; a barrel cap attached to the barrel at the proximal end of the barrel; a plunger assembly at least partially disposed within the barrel, the plunger assembly comprising: a shaft comprising: two or more lengthwise ribs, each lengthwise ribs disposed along a circumference of the shaft, the lengthwise ribs defining one or more portions of the circumference; and two or more radial fibs, each radial rib disposed between two or more of the lengthwise ribs, the radial ribs: disposed in at least one portion of the circumference but not extending along a full circumference of the shaft; and disposed lengthwise on the shaft between a distal and proximal ends of the shaft to provide a predetermined volume in the barrel when the radial rib contacts the barrel cap; a plunger attached to the distal end of the shaft; and a plunger cap attached to the proximal end of the shaft.