Abstract: A telescopic screw assembly for an injector includes an inner screw, an outer screw and a middle screw. The middle and outer screws are in a first threaded engagement, and the inner and middle screws are in a second threaded engagement. The inner screw is nested with the middle screw and the middle screw is nested with the outer screw in a contracted configuration of the screw assembly. Rotation of the outer screw in one direction advances the middle screw relative to the outer screw via the first threaded engagement and advances the inner screw relative to the middle screw via the second threaded engagement to telescopically extend the screw assembly into an expanded configuration. At least two of the inner, middle and outer screws are identified with a different visual indicator to enhance visual distinction between the screws, and readily visually indicate an extension progress of the screw assembly.

Abstract: A telescopic screw assembly for an injector includes an inner screw, an outer screw and a middle screw. The middle and outer screws are in a first threaded engagement, and the inner and middle screws are in a second threaded engagement. The inner screw is nested with the middle screw and the middle screw is nested with the outer screw in a contracted configuration of the screw assembly. Rotation of the outer screw in one direction advances the middle screw relative to the outer screw via the first threaded engagement and advances the inner screw relative to the middle screw via the second threaded engagement to telescopically extend the screw assembly into an expanded configuration. At least two of the inner, middle and outer screws are identified with a different visual indicator to enhance visual distinction between the screws, and readily visually indicate an extension progress of the screw assembly.

Abstract: A syringe inspection device and method for determining the position of a cannula in a cannula shield attached to a syringe. An electromagnetic radiation emitter is configured to emit electromagnetic radiation having a propagation axis. An electromagnetic radiation detector has an inspection window defined by a beam restrictor. A mount is configured to releasably retain the syringe between the emitter and the detector such that a longitudinal axis of the syringe is substantially coincident with the propagation axis. An image analyzer is operatively coupled to the detector. The image analyzer is configured to produce a syringe rejection signal when the cannula is irradiated and an electromagnetic image in the inspection window has two or less distinctly separate objects based on a contiguity of pixels having substantially like-valued intensity.

Abstract: A syringe inspection device and method for determining the position of a cannula in a cannula shield attached to a syringe. An electromagnetic radiation emitter is configured to emit electromagnetic radiation having a propagation axis. An electromagnetic radiation detector has an inspection window defined by a beam restrictor. A mount is configured to releasably retain the syringe between the emitter and the detector such that a longitudinal axis of the syringe is substantially coincident with the propagation axis. An image analyzer is operatively coupled to the detector. The image analyzer is configured to produce a syringe rejection signal when the cannula is irradiated and an electromagnetic image in the inspection window has two or less distinctly separate objects based on a contiguity of pixels having substantially like-valued intensity.