Drug delivery device with needle actuation mechanism
Inventors
WIESER, OLIVER • MARHÖFER, MAXIMILIAN
Assignees
Interested in licensing this patent?
MTEC can help explore whether this patent might be available for licensing for your application.
Publication Number
US-11744940-B2
Publication Date
2023-09-05
Expiration Date
Abstract
A drug delivery device (1) comprising a delivery unit (2) receiving a drug cartridge (3) containing a drug to be administered to a patient in need thereof, the delivery unit comprising a subcutaneous delivery mechanism (7) including a needle (24), a needle support (8) to which the needle is mounted, and a needle actuation mechanism (9) configured to move the needle from a retracted position within a housing (5) of the delivery unit (2), to an extended delivery position where the needle projects through a base wall (14) of the housing. The needle actuation mechanism comprises a rotary actuator (10) configured to engage an engagement lever (11) coupled to the needle support (8) for translating the needle support between retracted and extended delivery positions.
Core Innovation
The invention relates to a drug delivery device comprising a delivery unit receiving a drug cartridge containing a drug to be administered to a patient in need thereof. The delivery unit includes a subcutaneous delivery mechanism with a needle, a needle support to which the needle is mounted, and a needle actuation mechanism configured to move the needle from a retracted position within a housing to an extended delivery position where the needle projects through a base wall of the housing.
The needle actuation mechanism comprises a rotary actuator configured to engage an engagement lever coupled to the needle support for translating the needle support between the retracted position and the extended delivery position. The needle support comprises a translation guide member slidably mounted with respect to the housing, and a rotation guide member rotatably mounted to the translation guide member, with the needle fixed to the rotation guide member and configured to tilt the needle in a fully retracted park position after full retraction of the needle.
Safety/anti-reuse is implemented by anti-rotation guide surfaces and a needle-tip locking element that lock the needle in the fully retracted park position. Complementary anti-rotation guide surfaces of the needle support and the housing base wall prevent rotation during movement between the retracted and extended delivery positions and disengage in a fully retracted park position when the rotary actuator is rotated in a reverse direction (R−) to allow tilting.
Claims Coverage
The partial content includes two independent claims (clm-00001 and clm-00017). Across these independent claims, at least three main inventive features are repeatedly defined: a rotary-actuator-driven engagement lever translating a guided needle support between retracted and extended positions, a translation/rotation guide architecture that tilts the needle into a fully retracted park position, and guided anti-rotation and locking structures that support anti-reuse behavior in the parked position.
Rotary actuator engaging an engagement lever for translating a needle support
A needle actuation mechanism comprising a rotary actuator configured to engage an engagement lever coupled to the needle support for translating the needle support between the retracted position and the extended delivery position, wherein the rotary actuator moves the needle from a retracted position within a housing to an extended delivery position where the needle projects through a base wall of the housing.
Translation guide member and rotation guide member tilting the needle into a fully retracted park position
The needle support comprises a translation guide member slidably mounted with respect to the housing and a rotation guide member rotatably mounted to the translation guide member, with the needle fixed to the rotation guide member and configured to tilt the needle in a fully retracted park position after full retraction of the needle.
Elastically biased engagement lever allowing rotary actuator free turning in delivery direction (R+)
The engagement lever is pivotally mounted on the needle support and elastically engages the needle support configured to allow the engagement lever to elastically pivot and bias against the rotary actuator in the extended delivery position such that the rotary actuator may turn freely in a delivery direction (R+).
Anti-rotation guide surfaces and needle-tip locking element for parked-position anti-reuse
Complementary anti-rotation guide surfaces prevent rotation during movement and disengage in a fully retracted park position when the rotary actuator is rotated in reverse direction (R−) to allow tilting, and a locking element engages the tip of the needle to lock the needle in the fully retracted park position.
The independent claims define a rotary-actuator-driven needle translation mechanism coupled to a guided needle support that can tilt into a fully retracted park position, including in one independent claim an elastically biased engagement lever for rotary free turning in the delivery direction. The anti-reuse concept is supported by anti-rotation guide structures and a needle-tip locking element that block the needle in the fully retracted park position.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
Interested in licensing this patent?