Patent ID: 11878156
Assignee: ANTARES PHARMA, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. An injection device for injecting a medicament in a patient comprising:
a housing having at least one retaining arm and at least one retaining rib;
a syringe coupled to the housing and radially retained relative to the housing by the at least one retaining rib, the syringe comprising a container defining a fluid chamber containing the medicament, a needle and a piston;
a needle guard slideably coupled to the housing and spring biased in a distal direction relative to the housing by a return spring;
a ram slideably coupled to the housing and spring biased in the distal direction relative to the housing by a main spring, the ram having a rod coupled to the piston, the ram having at least one lock arm;
an initial position defined by the at least one retaining arm being disposed in a longitudinal path of the ram preventing firing of the ram;
a released position defined by the at least one retaining arm being clear from the longitudinal path of the ram allowing the ram to extend distally relative to the housing; and
a locked position defined by the at least one retaining arm being disposed in the longitudinal path of the ram and the at least one lock arm being disposed in a longitudinal path of the needle guard preventing the needle guard from being retracted relative to the housing,
wherein the injection device only comprises the housing, the syringe, the needle, the ram, the needle guard, the return spring, the main spring, and a cap.