Back to results
US 2020/0345936 A1Published application
Plunger and drug delivery device
AssigneeSanofi
InventorsMarc Schader, Hugo Revellat, William Timmis
Life of this patent
Estimating the term…
Abstract
The present specification relates to a plunger configured to transmit a force from an energy source to a piston of a primary container, the plunger comprising a plunger rod configured to be subjected to the force from the energy source, the plunger rod having an inner surface forming a cavity, wherein a support element adapted to constrain the energy source within the cavity protrudes radially inwards from the inner surface into the cavity.
Claims20
A plunger configured to transmit a force from an energy source to a piston of a primary container, the plunger comprising:
- a plunger rod configured to be subjected to the force from the energy source, the plunger rod having a longitudinal axis and an inner surface forming an elongated cavity along the longitudinal axis;
- and
- a support element adapted to constrain the energy source within the elongated cavity and protruding radially inwards from the inner surface into the elongated cavity to radially support the energy source within the elongated cavity.
A drug delivery device, comprising:
- a primary container defining a drug cavity for receiving a drug and having an outlet and a piston slidably arranged within the primary container;
- and
- a plunger configured to transmit a force to the piston of the primary container, the plunger comprising:
- a plunger rod having a longitudinal axis and an inner surface forming an elongated cavity along the longitudinal axis,
- an energy source arranged within the elongated cavity of the plunger rod to exert a force on the inner surface of the plunger rod, and
- a support element adapted to constrain the energy source within the elongated cavity and protruding radially inwards from the inner surface into the elongated cavity to radially support the energy source within the elongated cavity.
3 more elements
Dependencies are inferred from the claim text.