Apparatus including a cylindrical body and nub

Abstract

An apparatus may include a plunger and a substantially cylindrical body. The substantially cylindrical body may include an end portion having rounded edges and may define a cavity sized to receive the plunger. The substantially cylindrical body may include at least one opening extending from the cavity to an external surface. The at least one opening may a substantially irregular shape. In some embodiments, the at least one opening may extend from the cavity through a nub to the external surface. The nub may have a rounded shape. In some embodiments, the substantially irregular shape may include one of a slit, an oval shape, an elliptical shape, an hourglass shape, a rectangular shape, and a diamond shape. In some embodiments, the opening may be part of a non-cylindrical fluid passage.

What is claimed is: 
     
         1 . An apparatus comprising:
 a plunger; and   a substantially cylindrical body including an end portion having rounded edges and defining a cavity sized to receive the plunger, the substantially cylindrical body having a length and including at least one opening extending from the cavity to an external surface, the at least one opening having a substantially irregular shape; and   a nub extending for a distance of 4% to 6% of the length of the body from the end portion proximate to the at least one opening.   
     
     
         2 . The apparatus of  claim 1 , wherein the substantially irregular shape comprises at least one of a slit, an oval shape, an elliptical shape, an hourglass shape, a rectangular shape, and a diamond shape. 
     
     
         3 . The apparatus of  claim 1 , wherein the nub has a substantially rounded end. 
     
     
         4 . The apparatus of  claim 1 , further comprising a nub extending from the end portion and having a substantially rounded end, the nub including the at least one opening extending therethrough. 
     
     
         5 . The apparatus of  claim 1 , wherein the substantially cylindrical and the nub may be formed from a unitary material. 
     
     
         6 . The apparatus of  claim 1 , further comprising the substantially cylindrical body including a fastener element configured to mate to a corresponding feature of a cap. 
     
     
         7 . The apparatus of  claim 1 , wherein the substantially cylindrical body comprises a syringe. 
     
     
         8 . An apparatus comprising:
 a cylindrical body having a proximal end, a distal end and an elongate portion extending therebetween, the distal end having a rounded corner relative to the elongate portion to form a substantially smooth transition from the elongate portion to the distal end, the distal end further including an opening having a substantially irregular shape; and   a nub coupled to and extending in a range of 4 mm to 6 mm from the distal end proximate to the opening, the nub having a rounded end.   
     
     
         9 . The apparatus of  claim 8 , wherein the substantially irregular shape comprises at least one of a slit, an oval shape, an elliptical shape, an hourglass shape, a rectangular shape, and a diamond shape. 
     
     
         10 . The apparatus of  claim 8 , wherein the nub comprises at least one of a substantially hemispherical shape, a substantially annular shape, and a substantially elliptical shape. 
     
     
         11 . The apparatus of  claim 8 , wherein the nub includes an opening configured to align with the opening of the distal end. 
     
     
         12 . The apparatus of  claim 11 , further comprising a fluid passage configured to couple an internal cavity of the cylindrical body to the opening of the nub. 
     
     
         13 . The apparatus of  claim 12 , wherein the fluid passage comprises a non-cylindrical shape. 
     
     
         14 . The apparatus of  claim 8 , further comprising a plurality of second openings extending through the distal end of the cylindrical body. 
     
     
         15 . The apparatus of  claim 8 , wherein the cylindrical body includes an attachment element configured to mate with a corresponding attachment feature of a cap to secure the cylindrical body to the cap. 
     
     
         16 . An apparatus comprising:
 a tubular element including a body portion having a length and defining an internal cavity and including a distal end, the distal end including a nub extending from the distal end 4% to 6% of the body portion length and having an opening having a non-circular shape, the tubular element including a substantially smooth exterior surface having rounded edges; and   a plunger configured to fit within the cavity.   
     
     
         18 . The apparatus of  claim 16 , further comprising an attachment element on the tubular element, the attachment element configured to mate with a corresponding attachment feature of a cap. 
     
     
         19 . The apparatus of  claim 16 , wherein the non-circular shape comprises at least one of a slit, an oval shape, an elliptical shape, an hourglass shape, a rectangular shape, and a diamond shape. 
     
     
         20 . The apparatus of  claim 16 , wherein the tubular element comprises a syringe.