Prefillable drug delivery device

摘要

The present invention relates to a prefillable drug delivery device having a housing receiving a needle hub which is movable with respect to said needle hub between a retracted position and a protection position. The device also includes a tubular barrel intended to receive a drug that is pre-mountable on said housing so that said needle hub closes its distal end. The device further includes a sealing member actionable once said tubular barrel is pre-assembled on said housing, capable of transitioning from an inactive state where no sealing contact is present between said needle hub and said tubular barrel, to an active state, in which sealing contact is performed. In the active state of said sealing member, said tubular barrel is movable in translation with respect to said needle hub between a proximal position and a distal position, for realizing delivery of the drug.

主权项

1. Prefillable drug delivery device, comprising:
a housing at least partially receiving a needle hub, said housing being movable with respect to said needle hub between a retracted position, in which a distal end of said needle hub extends beyond a distal end of said housing, and a protection position, in which the distal end of said needle hub does not extend beyond the distal end of said housing, a tubular barrel for receiving a drug, said tubular barrel having an open proximal end and an open distal end, said tubular barrel being capable of being pre-assembled on said housing via its distal end so that at least part of said needle hub substantially closes the distal end of said tubular barrel, said tubular barrel being movable in translation and/or in rotation along a longitudinal axis with respect to said needle hub and to said housing, wherein said device further comprises a sealing member actionable once said tubular barrel is pre-assembled on said housing, said sealing member capable of transitioning from an inactive state in which no sealing contact is present between said part of said needle hub and an inner wall of said tubular barrel, to an active state, in which sealing contact is made between said part of said needle hub and the inner wall of said tubular barrel, wherein, in the active state of said sealing member, said tubular barrel is movable in translation with respect to said needle hub between a filling position, in which the tubular barrel may be filled with the drug to be delivered, and an end-of-delivery position, distally spaced with respect to said filling position, in which said drug potentially received within said tubular barrel has been substantially expelled from said tubular barrel via a needle.