Back to results
US 10,881,804 B2Granted
Medicament delivery device
AssigneeShl Medical AG
InventorsStefan Lööf, Stefan Morén
Life of this patent
Estimating the term…
Abstract
The present invention relates to a medicament delivery device comprising a housing, which housing is arranged to accommodate a medicament container, a drive unit operably arranged to act on said medicament container for expelling a dose of medicament, the drive unit comprising a plunger rod, a force element operably connected to said plunger rod, a connector arranged to releasibly hold said plunger rod, an actuator element operably arranged to said connector and a manually operable actuator arranged to act on said actuator element for releasing said connector when operated. The invention is characterised in a safety device arranged to releasibly hold said actuator element in a locking position with said connector, preventing unintended release of said plunger rod.
Claims20
A medicament delivery device, comprising:
- a proximal housing arranged to accommodate a medicament container;
- a distal housing comprising a drive unit, where the drive unit comprises:
- a plunger rod;
- a connector arranged to releasably hold the plunger rod;
- an actuator element slidably arranged around the connector such that the actuator element axially moves proximally relative to the connector from a locking position to an unlocking position, where in the locking position the actuator element prevents disengagement of the connector from the plunger rod and in the unlocking position the actuator element allows disengagement of the connector from the plunger rod;
- a safety device fixedly attached to the connector and abutting the actuator element when the actuator element is in the locking position, where the safety device prevents the actuator element from moving proximally from the locking position to the unlocking position;
- an actuator slidably arranged within an activator, where the activator is rotatably engaged with the distal housing and having a first position and a second position, where in the first position the actuator and the activator are in a locked engagement such that the actuator is prevented from moving proximally relative to the activator,
- wherein the fixed attachment of the safety device with the connector prevents rotational and axial movement of the safety device relative to the connector,
- wherein rotation of the activator from the first position to the second position unlocks the actuator so that the actuator can move proximally to engage and move the actuator element proximally.
6 more elements
A medicament delivery device, comprising:
- a proximal housing arranged to accommodate a medicament container;
- a distal housing comprising a drive unit, where the drive unit comprises:
- a plunger rod;
- a connector arranged to releasably hold the plunger rod;
- an actuator element slidably arranged around the connector such that the actuator element axially moves proximally relative to the connector from a locking position to an unlocking position, where in the locking position the actuator element prevents disengagement of the connector from the plunger rod and in the unlocking position the actuator element allows disengagement of the connector from the plunger rod;
- a safety device fixedly attached to the connector and abutting the actuator element when the actuator element is in the locking position, where the safety device prevents the actuator element from moving proximally from the locking position to the unlocking position;
- an actuator comprising a protrusion and slidably arranged within an activator comprising a circumferential groove, where the activator is rotatably engaged with the distal housing and having a first position and a second position, where in the first position the actuator and the activator are in a locked engagement such that the actuator is prevented from moving proximally relative to the activator,
- wherein rotation of the activator from the first position to the second position unlocks the actuator so that the actuator can move proximally to engage and move the actuator element proximally.
5 more elements
A medicament delivery device, comprising:
- a proximal housing arranged to accommodate a medicament container;
- a distal housing comprising a drive unit, where the drive unit comprises:
- a plunger rod;
- a connector arranged to releasably hold the plunger rod;
- an actuator element slidably arranged around the connector such that the actuator element axially moves proximally relative to the connector from a locking position to an unlocking position, where in the locking position the actuator element prevents disengagement of the connector from the plunger rod and in the unlocking position the actuator element allows disengagement of the connector from the plunger rod;
- a safety device fixedly attached to the connector and located proximal of the actuator element when the actuator element is in the locking position such that the actuator element is prevented from moving proximally from the locking position to the unlocking position;
- an actuator slidably arranged within an activator, where the activator is rotatably engaged with the distal housing and having a first position and a second position, where in the first position the actuator and the activator are in a locked engagement such that the actuator is prevented from moving proximally relative to the activator,
- wherein the fixed attachment of the safety device with the connector prevents rotational and axial movement of the safety device relative to the connector,
- wherein rotation of the activator from the first position to the second position unlocks the actuator so that the actuator can move proximally to engage and move the actuator element proximally.
6 more elements
Dependencies are inferred from the claim text.