Patent ID: 11957879
Assignee: SANOFI-AVENTIS DEUTSCHLAND GMBH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. An autoinjector comprising:
a case configured to receive a syringe;
a slidable member that is movable axially within the case to cause at least a portion of the syringe to move axially when the syringe is disposed within the case for dispensing a medicament through a needle of the syringe;
a locking member configured to prevent actuation of the slidable member when the autoinjector is in a pre-dispense configuration a sleeve coupled to a distal end of the case and surrounding at least a portion of a needle of the syringe when the syringe is disposed within the case;
an elongate member extending proximally from the sleeve and configured to deflect the locking member to allow actuation of the plunger;
two drive springs coupled to the slidable member and configured to apply a biasing force that acts on the slidable member to move the slidable member distally within the case, wherein the two drive springs are parallel to each other and are parallel to a distal direction;
a door hingedly coupled to the case and adjustable between an open position and a closed position;
a linkage that couples the door to the case; and
a collar that is configured to engage a needle boot of the syringe when the syringe is disposed within the case,
wherein the elongate member is configured to deflect the locking member when the sleeve is pushed against the injection site,
wherein deflection of the locking member allows the slidable member to move in the distal direction under the biasing force of the two drive springs,
wherein the locking member has a first ramped surface, wherein the elongate member has a second ramped surface, and wherein the first and second ramped surfaces abut each other when the autoinjector is in the pre-dispense configuration, and
wherein at least one of the two drive springs comprises a tension spring.