Patent ID: 8048029

Claim:
An injector apparatus comprising: a cylindrical housing that includes a deflectable member, the deflectable member having: a radially outward protrusion, and a radially inward protrusion; a tubular syringe guide housed within the housing to receive a syringe barrel, the syringe guide including: a tubular body, a recess about a proximal end of the tubular body, and a radially outwardly extending flange about a distal end of the tubular body; a biasing member that includes: a first end that engages the radially outwardly extending flange, and a second end that engages a distal end of the housing; and a guard releasably connected to the distal end of the housing, the guard includes a tubular guard body to receive the deflectable member and the syringe guide, the deflectable member being movable between a biased inward position with the radially inward protrusion residing within the recess of the syringe guide and between the syringe guide and the guard to releasably hold the syringe guide from moving in an axial direction and a biased outward position when the guard is removed from the housing in which the radially inward protrusion engages an exterior surface of the tubular body spaced apart from the recess and the radially outward protrusion extends beyond an exterior surface of the cylindrical housing to impede the guard from being fully reseated on the housing.