US 11,724,042 B2
System and method for safety syringe
Gary Steese-Bradley, San Jose, CA (US); Stephen H. Diaz, Palo Alto, CA (US); Alan E. Shluzas, San Carlos, CA (US); John F. Shanley, Emerald Hills, CA (US); Jeff Tillack, Foster City, CA (US); Dan Thayer, Tustin, CA (US); and John Merhige, Subury, MA (US)
Assigned to Credence Medsystems, Inc., Menlo Park, CA (US)
Filed by CREDENCE MEDSYSTEMS, INC., Menlo Park, CA (US)
Filed on Dec. 14, 2020, as Appl. No. 17/121,414.
Application 17/121,414 is a continuation of application No. 15/801,259, filed on Nov. 1, 2017, granted, now 10,864,330.
Claims priority of provisional application 62/542,230, filed on Aug. 7, 2017.
Claims priority of provisional application 62/480,276, filed on Mar. 31, 2017.
Claims priority of provisional application 62/431,382, filed on Dec. 7, 2016.
Claims priority of provisional application 62/416,102, filed on Nov. 1, 2016.
Prior Publication US 2021/0121640 A1, Apr. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/32 (2006.01); A61M 5/178 (2006.01); A61M 5/24 (2006.01); A61M 5/20 (2006.01); A61M 5/28 (2006.01); A61M 5/315 (2006.01); A61M 5/31 (2006.01); A61J 1/20 (2006.01)
CPC A61M 5/3221 (2013.01) [A61M 5/178 (2013.01); A61M 5/2066 (2013.01); A61M 5/2448 (2013.01); A61M 5/28 (2013.01); A61M 5/284 (2013.01); A61M 5/3137 (2013.01); A61M 5/3148 (2013.01); A61M 5/31501 (2013.01); A61M 5/31511 (2013.01); A61M 5/31513 (2013.01); A61M 5/3202 (2013.01); A61M 5/322 (2013.01); A61M 5/3234 (2013.01); A61J 1/2006 (2015.05); A61J 1/2096 (2013.01); A61M 5/3232 (2013.01); A61M 5/3293 (2013.01); A61M 2005/323 (2013.01); A61M 2005/3223 (2013.01); A61M 2005/3231 (2013.01); A61M 2005/3241 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for mixing drug products and injecting, comprising: a cylindrical injection body defining a proximal opening and a distal needle interface at a distal end thereof; proximal and distal stopper members disposed in the cylindrical injection body, forming a proximal drug chamber between the proximal and distal stopper members and a distal drug chamber between the distal stopper member and the distal end of the cylindrical injection body; a plunger member defining a plunger interior and configured to insert the proximal stopper member relative to the cylindrical injection body, the plunger member including a needle retention feature disposed in the plunger interior, an energy-storage member disposed in the plunger interior, and an energy-storage member latching member disposed in the plunger interior; and a needle hub assembly coupled to the distal needle interface of the cylindrical injection body, the needle hub assembly including a needle having a needle proximal end feature, a hub, and a needle latching member configured to couple the needle to the hub, wherein first and second sizes of the respective proximal and distal drug chambers can be modified by movement of the proximal and distal stopper members relative to the cylindrical injection body, wherein the needle is at least partially retractable into plunger interior upon insertion of the plunger member relative to the cylindrical injection body to transform the energy-storage member latching member from a latched state to an unlatched state, and wherein the distal stopper includes a funnel disposed at a distal end thereof, the funnel tapering in a proximal direction, such that an inner diameter of a distal end of the funnel is larger than an inner diameter of a proximal end of the funnel wherein the distal stopper member comprises a proximal gate having a closed configuration wherein the needle proximal end feature cannot pass through the proximal gate, and an open configuration wherein the needle proximal end feature can pass through the proximal gate.