US 12,083,294 B2
Coupling between a telescoping needle shield and a catheter adapter
Derek Jewell, Cottonwood Heights, UT (US); Yiping Ma, Layton, UT (US); John Stokes, Pleasant View, UT (US); and Chad Alan Tagge, Sandy, UT (US)
Assigned to Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed by Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed on Feb. 18, 2020, as Appl. No. 16/793,917.
Claims priority of provisional application 62/808,133, filed on Feb. 20, 2019.
Prior Publication US 2020/0261702 A1, Aug. 20, 2020
Int. Cl. A61M 25/06 (2006.01); A61M 25/01 (2006.01)
CPC A61M 25/0618 (2013.01) [A61M 25/0606 (2013.01); A61M 2025/0175 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A catheter system, comprising:
a catheter adapter, comprising a distal end, a proximal end, and an internal wall forming a lumen extending through the distal end of the catheter adapter and the proximal end of the catheter adapter; and
a needle shield device coupled to the catheter adapter, the needle shield device comprising:
a needle housing, comprising:
an elongated body having a distal end, a proximal end, and a slot disposed between the distal end of the elongated body and the proximal end of the elongated body; and
a nose portion coupled to the distal end of the elongated body, wherein the nose portion comprises a plate and an extension, wherein the extension is inserted into the catheter adapter, wherein the extension comprises a cylindrical shape extending distally from the plate to a distal end of the extension, wherein the extension further comprises two protrusions on opposite sides of the cylindrical shape and spaced apart from the plate and the distal end of the cylindrical shape, wherein each of the two protrusions contacts a portion of the internal wall of the catheter adapter, wherein when the needle housing is disconnected from the catheter adapter, a maximum outer diameter of the extension is disposed at the two protrusions and is greater than an inner diameter of the portion of the internal wall of the catheter adapter contacting the two protrusions such that the extension is disposed within the catheter adapter in an interference fit when the needle housing is coupled to the catheter adapter, wherein a surface of the portion of the internal wall of the catheter adapter contacting the two protrusions and extending through the proximal end of the catheter adapter is smooth;
a needle assembly slideably coupled to the needle housing, comprising:
an introducer needle comprising a sharp distal tip and a proximal end;
a needle grip; and
a needle hub having a protuberance, wherein the proximal end of the introducer needle is secured within the needle hub, wherein the protuberance is coupled to the needle grip, wherein the protuberance slideably fits within the slot, wherein the needle grip partially surrounds the needle housing such that the needle hub and the needle housing are configured to slide relative to each other, wherein the needle assembly is moveable between a distal position and a proximal position with respect to the needle housing, wherein in response to movement of the needle assembly to the proximal position, the sharp distal tip is disposed within the needle housing.