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AssigneeBio-Plexus, Inc.
InventorsMark J. Burzynski, Alexander K. Jones, Richard S. Kearns, John M. Polidoro, Carl R. Sahi, Chad C. Smutney
Estimating the term…
A self-blunting needle medical device comprises a needle cannula (18) fixed to a hub (20) having a receiving structure therein such as ferrule (22) and a movable blunting member (14) movably received within the cannula (18). Ferrule (22) defines a passage (38) extending therethrough, within which both the cannula (18) and the movable member (14) can be received and which establishes a coaxial relationship between them. The ferrule (22) defines a first guide surface (40) for directing the blunting end (14a) of the movable member (14) into the central bore of the cannula (18) during assembly. A second guide surface (42) performs the function of guiding the mounting end (18b) of the cannula (18) into ferrule (22) for mounting therein. Typically, the cannula (18) has a tissue puncture tip (18a). When the movable member (14) is retracted into the cannula (18), the puncture tip (18a) is exposed for use, e.g., injection into tissue. The movable member (14) is then moved to an extended position in which blunting end (14a) projects beyond the puncture tip (18a), to render the device safe with regard to subsequent accidental needle sticks. Methods of assembling the self-blunting needle are also presented. In various embodiments, the guide member may be integral with the assembled device or may be defined by a guide member that is used only in the assembly process and from which the assembled device may be removed.
A self-blunting needle cannula device comprising:
A method for assembling a self-blunting needle device for a syringe, the device comprising an internal component comprising a blunting member and an external component comprising a needle cannula having an axially-extending through-bore therein, the method comprising advancing the blunting member into contact with a guide surface configured to lead axially to the through-bore to guide the blunting member into the bore and advancing the blunting member along said guide surface and into the through-bore without engaging a catch surface perpendicular to the needle cannula, to produce an assembled device.
A method for assembling a self-blunting needle device comprised of (i) an external component comprising a needle cannula having a through-bore, a puncture tip and a mounting end and a guide member having a first end and a second end and a passage that extends axially from the first end to the second end and further comprising at the first end a first guide surface that leads axially to the passage and at the second end a second guide surface that leads axially to the passage, wherein the passage is sized to receive the needle cannula;
Dependencies are inferred from the claim text.