Hypodermic needle cannula guard

Claim 1

A guard for hypodermic needle cannula comprising: an elongated hollow shell having an interior wall, an exterior wall, an open receiver end and an opposing distal end, the shell having an interior central chamber extending the length of the shell from the open end bounded by the interior wall, the shell divided into a first zone extending longitudinally from the open receiver end and adapted to receive and secure the hub of the hypodermic needle cannula and a second zone extending from the first zone to the distal end and adapted to receive and enclose a hypodermic needle cannula, the shell having a slot running a substantial length of the shell from the open receiver end, the slot forming a passage from the exterior of the shell into the central chamber; and a screen wall having an L-shaped cross-section, one arm of the L extending radially inwardly from the interior wall of the shell proximate one side of the slot and a second arm of the screen wall extending circumferentially from the first arm, spaced apart, but across the slot, to screen the slot from the central chamber to inhibit the chance exit of a hypodermic needle cannula from the central chamber though the slot.