Autoinjector
AssigneeSanofi-Aventis Deutschland GmbH
InventorsCharley Henderson, David Cross, Douglas Ivan Jennings, Ryan Anthony McGinley
Life of this patent
Estimating the term…
Abstract
Described is an autoinjector comprising of a case, a motor adapted to rotate a drive gear, and a curvi-linear plunger adapted to mate with the drive gear. The plunger includes a distal end with a resilient flange, which in a non-deflected state, abuts a proximal collar of a syringe, and, in a deflected state, advances through the proximal collar and engages a stopper in the syringe.
Claims15
An autoinjector (1) comprising:
- a case (2);
- a motor (15) adapted to rotate a drive gear (20);
- a curvi-linear plunger (18) adapted to mate with the drive gear (20),
- wherein the plunger (18) includes a distal end with a resilient flange, which in a non-deflected state, abuts a proximal collar (5.2) of a syringe (4), and, in a deflected state, advances through the proximal collar (5.2) and engages a stopper (19) in the syringe (4).
The autoinjector (1) according to any of the preceding claims, further comprising:
- a gear train (17) coupled to the motor (15), the gear train (17) including a linkage (17.2) having a threaded end adapted to mate with the drive gear (20).
The autoinjector (1) according to any of the preceding claims, wherein the plunger (18) comprises a plurality of hinged links (18.2).
The autoinjector (1) according to any of the preceding claims, further comprising:
- a plurality of guides disposed within the case (2), wherein the plunger (18) engages the guides.
The autoinjector (1) according to any of the preceding claims, further comprising:
- an energy source (12) including a rechargeable or non-rechargeable battery.
The autoinjector (1) according to any of the preceding claims, further comprising:
- a retraction spring (28) biasing the syringe (4) in a retracted position within the case (2).
The autoinjector (1) according to any of the preceding claims, further comprising:
- a user interface adapted to provide at least one of visual and audible feedback and instruction.
The autoinjector (1) according to any of the preceding claims, further comprising:
- a sensor arrangement (27) adapted to detect proximity and properties of an injection site surface.
Dependencies are inferred from the claim text.