US 12,076,535 B2
Autoinjector
Charley Henderson, Cambridgeshire (GB); David Cross, Hertfordshire (GB); Douglas Ivan Jennings, Hertfordshire (GB); and Ryan Anthony McGinley, Cambridgeshire (GB)
Assigned to Sanofi-Aventis Deutschland GMBH, Frankfurt am Main (DE)
Filed by SANOFI-AVENTIS DEUTSCHLAND GMBH, Frankfurt am Main (DE)
Filed on Apr. 21, 2022, as Appl. No. 17/726,381.
Application 17/726,381 is a continuation of application No. 16/507,291, filed on Jul. 10, 2019, granted, now 11,344,676.
Application 16/507,291 is a continuation of application No. 14/440,819, granted, now 10,391,246, issued on Aug. 27, 2019, previously published as PCT/EP2013/072897, filed on Nov. 4, 2013.
Claims priority of application No. 12191442 (EP), filed on Nov. 6, 2012.
Prior Publication US 2022/0241507 A1, Aug. 4, 2022
Int. Cl. A61M 5/20 (2006.01); A61M 5/31 (2006.01); A61M 5/32 (2006.01); A61M 5/46 (2006.01)
CPC A61M 5/2033 (2013.01) [A61M 5/3129 (2013.01); A61M 5/3245 (2013.01); A61M 2005/202 (2013.01); A61M 2005/206 (2013.01); A61M 2005/208 (2013.01); A61M 2005/314 (2013.01); A61M 5/3202 (2013.01); A61M 5/3204 (2013.01); A61M 2005/3247 (2013.01); A61M 5/326 (2013.01); A61M 5/46 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01); A61M 2205/583 (2013.01); A61M 2205/586 (2013.01); A61M 2205/60 (2013.01); A61M 2205/6009 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating an autoinjector, wherein the autoinjector comprises a case configured to receive a syringe, a plunger slidably disposed in the case, and two parallel compression drive springs disposed on opposite sides of the syringe, the two parallel compression drive springs positioned between a proximal end of the case and a distal end of the plunger, the two parallel compression drive springs respectively defining two axes along which the two parallel compression drive springs are compressible and that are parallel to the needle insertion direction, and
wherein the method comprises:
applying a biasing force on the plunger with the two parallel compression drive springs to move the plunger relative to the case;
advancing the syringe relative to the case with the plunger; and
advancing a stopper of the syringe relative to a body of the syringe with the plunger.