Patent ID: 8152763
Filing Date: 2012-04-10
Classification: A61M

Abstract:
1. A syringe having a cylinder and plunger slidable therethrough, a carpule defining a fluid chamber for medication removably positioned in said cylinder having a retractable needle at a trailing end of said carpule for extension between a retracted position within said carpule and an extended position beyond a leading end of said syringe; a fluid-expelling first plug member at a trailing end of said carpule and a needle-retaining second plug member at a leading end of said carpule for extension of a trailing end of said needle through said second plug member into communication with a medical solution in said carpule between said first and second plug members, and a generally funnel-shaped guide member at said leading end of said syringe for guiding advancement of said needle between said retracted and extended positions; and wherein said needle includes an enlarged collar portion between said trailing end and said leading end of said needle for extension through a generally funnel-shaped bore of said funnel-shaped guide member and extension of said leading end of said needle through a central bore in a second portion of said guide member which is of reduced diameter relative to said funnel-shaped bore.