| 摘要 |
A syringe includes a monolithic barrel (12) being divided into two bore portions, a first bore portion (22) extending from the needle adapter partially towards the second axial end and a second bore portion (24) extending from the first bore portion to the second axial end, wherein the first bore portion is circular in cross section and the second bore portion has a cross sectional shape that at least partially extends beyond the radius of the first bore portion. The syringe includes a plunger (14) sized to fit within and move along the longitudinal axis of the first bore portion. A plunger rod (16) extends along the longitudinal axis of the monolithic barrel, the plunger rod including a first array of notches and/or protuberances (30) along at least a portion of its length. The syringe includes an insert (18) sized to fit wholly within the second bore portion, the insert defining a bore through which the plunger rod extends and including a first finger (36) extending into the bore defined by the insert for, in use, engaging the first array of notches and/or protuberances on the plunger. |
| 主权项 |
1. A syringe including:
a monolithic barrel defining a longitudinal axis, first and second axial ends, and a bore extending along the longitudinal axis, the bore terminating in a needle adapter at the first axial end and being divided into two bore portions, a first bore portion extending from the needle adapter partially towards the second axial end and a second bore portion extending from the first bore portion to the second axial end, wherein the first bore portion is circular in cross section and the second bore portion has a cross sectional shape that at least partially extends beyond the radius of the first bore portion; a plunger sized to fit within and move along the longitudinal axis of the first bore portion, with the plunger sealed against the inner wall of the monolithic barrel within the region of the first bore portion; a plunger rod extending along the longitudinal axis of the monolithic barrel towards the second axial end, the plunger rod including a first array of notches and/or protuberances along at least a portion of its length; and an insert sized to fit wholly within the second bore portion, the insert defining a bore through which the plunger rod extends and including a first finger extending into the bore defined by the insert for, in use, engaging the first array of notches and/or protuberances on the plunger rod. |
