Patent ID: 11944787
Assignee: SANOFI
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A method comprising:
moving a needle sleeve within an elongate housing of an injector device from an extended position in which the needle sleeve at least partially extends from a distal end of the elongate housing to a retracted position in which the needle sleeve is received further within the elongate housing than in the extended position;
receiving a track follower within a first guide track, the first guide track extending around at least 90 degrees of a circumference of a rotatable member and at least a portion of the first guide track having a helical or spiral shape, wherein the first guide track is formed on one of the rotatable member and the needle sleeve, and the track follower is formed on the other of the rotatable member and the needle sleeve, the rotatable member being part of a release mechanism of the injector device;
rotating the rotatable member within the elongate housing from a first position to a second position as the needle sleeve is moved from the extended position to the retracted position;
receiving a projection within a second guide track, wherein the second guide track is formed on one of the rotatable member and a piston rod, and the projection is formed on the other of the rotatable member and the piston rod; and
moving the piston rod distally within the elongate housing, by a piston spring, to engage a container of medicament received within the elongate housing upon rotating the rotatable member to the second position, wherein the movement of the piston rod is prevented when the rotatable member is in the first position and the movement of the piston rod is permitted when the rotatable member is in the second position.