Drug delivery device
AssigneeSociete Industrielle de Sonceboz S.A.
InventorsDavid Staub, Thierry Martin, Nicolas Bailo, Denis Tilloy
Life of this patent
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Abstract
There is described a patch pump comprising a cartridge, a power source, a pump system, a drug delivery device and a control system configured to operate in particular the pump system and the drug delivery device. The pump system comprises, on the one hand, a pump having a pump housing containing a pump piston and a valve piston and, on the other hand, a pump drive comprising a piston motor and a valve motor for driving the pump piston and the valve piston independently from each other through a first and a second transmission. The drug delivery device comprises a transdermal delivery system having a needle actuation mechanism configured for transdermal insertion of a cannula.
Claims8
A drug delivery device comprising:
- a transdermal delivery system having a needle actuation mechanism and a needle assembly comprising:
- a needle connected to a needle holder,
- a cannula connected to a cannula holder, and
- a needle guiding element configured to guide axial displacement of the needle and the cannula,
- the needle actuation mechanism comprising:
- a cam member having a cam housing and
- a spring housed inside the cam housing in order to impart rotational movement to the cam member relative to the needle guiding element, said needle and cannula holders comprising each an engagement portion,
- wherein the engagement portion of the needle holder is configured to engage with a first and a second cam surface and the engagement portion of the cannula holder is configured to engage with a locking surface, the first and second cam surfaces being arranged around a circumference of an outer surface of the cam housing along a first portion with a first gradient configured for a needle insertion movement followed by a second portion with a second gradient configured for a needle retraction movement such that the needle and the cannula are moved from a retracted position to an extended position upon rotation of the cam member through a first predetermined angle, and such that the needle is brought back in the retracted position upon further rotation of said cam member through a second predetermined angle, whereby during rotation through said second predetermined angle, the engagement portion of the cannula holder abuts against the locking surface to maintain the cannula in the extended position configured for transdermal delivery.
Dependencies are inferred from the claim text.