Patent ID: 9592334
Date: 2017-03-14
CPC Classifications: A61M

Claim:
1. A pre-fill syringe comprising: a receiving tube defining a chamber for receiving and accommodating a pre-fill medium, the receiving tube having an inner circumferential surface and including a nozzle at one end region of the receiving tube; a seal member provided in the receiving tube at an opposite end region of the receiving tube, the seal member being movable within the tube and sealing against the inner circumferential surface; and a piston configured to engage with the seal member during use to move the seal member within the receiving tube from said other end region of the tube towards the nozzle, wherein a circumference of the piston is variable by a user such that the circumference of at least part of the piston is configured to be expanded and compressed by the user to move the piston between an expanded state, in which the piston is configured to encompass and surround the receiving tube in a manner of a sheath during transport, and a compressed state for moving the seal member within the receiving tube during use.