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US 12,582,780 B2Granted
Drug delivery device
AssigneeSanofi-Aventis Deutschland GmbH
InventorsStefan Wendland, Anke Liewald, Frank Richter, Caroline Stephan
Life of this patent
Estimating the term…
Abstract
The invention relates to a drug delivery device comprising: a syringe with a body from which a needle extends and an inner sheath; a piston rod comprising a piston and an actuation head, a support sheath for holding the body. It is envisaged that the support sheath and the actuation head comprise corresponding indicators.
Claims30
A drug delivery device comprising:
- a support sheath having a distal support sheath portion and a proximal support sheath portion, the proximal support sheath portion extending radially beyond the distal support sheath portion and comprising a proximally-extending wall that defines a receptacle for a proximal flange of a syringe, a distal portion of the proximally-extending wall of the support sheath comprising a first latch element, and the support sheath configured such that at least a portion of the first latch element is distal to the proximal flange of the syringe when the syringe is supported in the drug delivery device;
- a plunger head comprising a proximal end and a distally-extending wall extending from the proximal end of the plunger head, a distal portion of the distally-extending wall of the plunger head comprising a second latch element comprising a protrusion, the protrusion extending in a radial direction from the distally-extending wall of the plunger head and extending circumferentially around a longitudinal axis of the plunger head, and the plunger head is configured such that at least a portion of the second latch element is distal to the proximal flange of the syringe when the syringe is supported in the drug delivery device;
- and
- a plunger rod integrally formed with the plunger head and configured to slide relative to the support sheath between (i) a proximal position in which the protrusion of the second latch element is proximally spaced apart from the first latch element of the support sheath and (ii) a distal position in which the protrusion of the second latch element of the plunger head is engaged with the first latch element of the support sheath to provide at least one visual, audible, or tactile indication that a medicament has been substantially dispensed from the syringe,
- wherein the drug delivery device is configured such that, when the protrusion of the second latch element of the plunger head is engaged with the first latch element of the support sheath and the syringe is supported by the drug delivery device, (i) a proximal portion of the distally-extending wall of the plunger head extends proximally beyond the support sheath, and (ii) the first and second latch elements are radially outward of the proximal flange of the syringe.
2 more elements
A drug delivery device comprising:
- a support sheath having a distal support sheath portion and a proximal support sheath portion, the proximal support sheath portion extending radially beyond the distal support sheath portion and comprising a proximally-extending wall defining a receptacle, a distal portion of the proximally-extending wall comprising a first latch element, and the support sheath configured such that at least a portion of the first latch element is distal to a proximal flange of a syringe when the syringe is supported in the drug delivery device;
- a plunger head comprising a proximal end and a distally-extending wall extending from the proximal end, a distal portion of the distally-extending wall of the plunger head comprising a second latch element comprising a protrusion, the protrusion extending in a radial direction from the distally-extending wall of the plunger head and extending circumferentially around a longitudinal axis of the plunger head;
- and
- a plunger rod axially coupled to the plunger head and configured to slide relative to the support sheath from (i) a proximal position in which the plunger head is axially spaced apart from the receptacle of the support sheath to (ii) a distal position in which the protrusion of the second latch element of the plunger head is engaged with the first latch element of the support sheath to provide at least one visual, audible, or tactile indication that a medicament has been substantially dispensed from the syringe,
- wherein the drug delivery device is configured such that, when the protrusion of the second latch element of the plunger head is engaged with the first latch element of the support sheath and the syringe is supported by the drug delivery device, (i) a proximal portion of the distally-extending wall of the plunger head extends proximally beyond the support sheath, and (ii) the first and second latch elements are radially outward of the proximal flange of the syringe.
2 more elements
A method comprising:
- distally moving a plunger rod of a drug delivery device relative to a support sheath of the drug delivery device from (i) a proximal position in which a plunger head coupled to the plunger rod is axially spaced apart from a receptacle defined by a proximal support sheath portion of the support sheath to (ii) a distal position in which a first latch element on the proximal support sheath portion of the support sheath engages a protrusion of a second latch element on a distal portion of a distally-extending wall of the plunger head to produce at least one visual, audible, or tactile indication that a medicament has been dispensed from a syringe of the drug delivery device,
- wherein the protrusion extends in a radial direction from the distally-extending wall of the plunger head and extends circumferentially around a longitudinal axis of the plunger head, and the drug delivery device is configured such that, when the protrusion of the second latch element of the plunger head is engaged with the first latch element of the support sheath, (i) a proximal portion of the distally-extending wall of the plunger head extends proximally beyond the support sheath, and (ii) the first and second latch elements are radially outward of a proximal flange of the syringe.
Dependencies are inferred from the claim text.