US 12,251,543 B2
Variable length injection syringe
John Knight, Lincoln, NE (US); Jeffrey Reed, Minden, NE (US); Scott Townsend, Holdrege, NE (US); and Patrick McCallum, Franklin Lakes, NJ (US)
Assigned to Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Appl. No. 17/631,812
Filed by Becton, Dickinson and Company, Franklin Lakes, NJ (US)
PCT Filed Jul. 29, 2020, PCT No. PCT/US2020/044059
§ 371(c)(1), (2) Date Jan. 31, 2022,
PCT Pub. No. WO2021/025922, PCT Pub. Date Feb. 11, 2021.
Claims priority of provisional application 62/882,277, filed on Aug. 2, 2019.
Prior Publication US 2022/0273888 A1, Sep. 1, 2022
Int. Cl. A61M 5/32 (2006.01); A61M 5/46 (2006.01)
CPC A61M 5/3269 (2013.01) [A61M 5/3245 (2013.01); A61M 5/3275 (2013.01); A61M 5/46 (2013.01); A61M 5/3202 (2013.01); A61M 2005/3247 (2013.01); A61M 2005/3254 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A syringe assembly comprising:
a syringe having a proximal end and a distal end, a needle extending from said distal end of said syringe; and
a shield positioned on said syringe for sliding between a first position where said needle is exposed a first length for filling said syringe, a second position for exposing a second length of said needle that is less than said first length where a locking mechanism retains the shield in the first position, second position, and a third position for covering said needle where the locking mechanism locks the shield in the third position;
a base having a sleeve having a first longitudinal passage for coupling to the syringe and a body for movably receiving the shield, the body having a second longitudinal passage, a spring biased finger in said second longitudinal passage, said spring biased finger having a distal end extending toward a distal end of the base and configured to bend inwardly relative to said base;
said shield having an arm extending from a proximal end of said shield, said arm received in said second longitudinal passage of said body for sliding relative to said base, said arm having a recessed portion on an inner surface at a distal end of said arm for receiving said distal end of said spring biased arm finger of said base to retain said shield in the second position.