Medical syringes are used to inject a fluid or medication inside a body. A plunger is pushed along the inside of the syringe barrel, which then moves the fluid through a needle inside the body. FIG. 1 shows a typical medical syringe barrel 100 with plunger 110. Plunger 110 is typically a rubber tip with for example three ribs.
Lubrication of the inside surface 120 of the syringe barrel 100 is crucial to reduce the friction between the plunger 110 and the inner surface of the syringe barrel and ensure effective injection of fluid 130.
Syringe barrels are normally lubricated by spraying the inside of the syringe barrel using a spraying nozzle, which is fixed in space in the middle of the cylindrical barrel, and which in turn is moved up and down past the sprayer while it is active.
This method of lubrication generally works well, but is subject to irregularities, which can arise when the sprayer does not spray uniformly in all directions or may not be centered in the middle of the syringe barrel. The present invention advances the technology of syringe barrels by addressing at least some of the current problems with lubrication of these syringe barrels.