Pen needle and safety shield system

• US 7,815,611 B2
• Filed: 08/31/2007
• Issued: 10/19/2010
• Est. Priority Date: 08/02/2000
• Status: Expired due to Term

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Desalvo, David E., Giambattista, Lucio
• Primary Examiner(s): Sirmons; Kevin C
• Assistant Examiner(s): Gilbert; Andrew M
• Application Number:
  US11/848,575
• Publication Number:
  US 20070293819A1
• Time in Patent Office: 1,145 Days
• Field of Search: 604/110, 604/111, 604192-198, 604/264
• US Class Current: 604/198
• CPC Class Codes: A61D 7/00 Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals for reproduction or fertilisation A61D19/00 ; devices for implanting pellets, radon seeds or the like A61M37/0069
• CPC Class Codes: A61M 2005/3104 Caps for syringes without needle
• CPC Class Codes: A61M 2005/3247 Means to impede repositioning of protection sleeve from needle covering to needle uncovering position
• CPC Class Codes: A61M 2005/3267 Biased sleeves where the needle is uncovered by insertion of the needle into a patient's body
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/6081 Colour codes
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/3205 Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles for sharps A61B50/362; disintegrating apparatus in general B02C, e.g. B02C19/0075, B23H9/001; disposal of medical waste in general B09B3/00; receptacles for refuse disposal in general B65F1/00
• CPC Class Codes: A61M 5/326 Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
• CPC Class Codes: A61M 5/3271 with guiding tracks for controlled sliding of needle protective sleeve from needle exposing to needle covering position
• CPC Class Codes: A61M 5/347 rotatable, e.g. bayonet or screw A61M5/344 takes precedence

Abstract

A safety shield system for a needle cannula of a pen needle injector or similar device, wherein the safety shield may be retracted from a first position enclosing the needle to a second position exposing the needle for injection. The safety shield system permits retraction of the safety shield during use, but extends the shield enclosing the needle in a locked position following use. The shield system is utilized with a pen needle injector having a double ended needle cannula mounted in a hub received on the open end of the pen needle injector. The assembly is disposed of by removing the assembly and needle cannula hub and storing the assembly in the cup-shaped cap enclosing the exposed end of the needle cannula within the cap. The cap includes internal radial ribs preventing retraction of the shield prior to removing the cap preventing inadvertently piercing the cap during assembly.

Claims

1. A safety shield system for use with a vial having fluid disposed therein, the safety shield system including:

a hub member adapted to receive the vial;

a needle cannula mounted to the hub member and having a first end adapted for insertion into the vial and a second end adapted for insertion into a patient;

a clip member attached to the hub member and having a lateral projection;

a shield having an open end received around the clip member and a generally closed end having a central opening therethrough receiving the second end of the needle cannula, the shield being moveably mounted with respect to the hub member between a first locked position surrounding the needle cannula and a second position exposing the needle cannula, the shield including at least one sidewall opening for receiving the lateral projection when the shield is extended to the first locked position such that the lateral projection locks the shield in the first locked position to prevent subsequent movement of the shield from the first locked position and to provide a visual indicator that the safety shield is locked,

the shield having an inwardly projecting finger releasably retaining the lateral projection on the hub during an injection; and

a spring disposed within the shield for biasing the shield toward the first locked position.

2. The safety shield system defined in claim 1, wherein the lateral projection is made of a resilient material and includes a hook-shaped end portion opening toward the shield and the sidewall opening extends through a side wall of the shield for receiving the hook-shaped end portion therethrough to lock the shield in the first position surrounding the needle cannula.

3. The safety shield system defined in claim 1, wherein the clip member includes a plurality of spaced resilient lateral projections and the shield includes a plurality of corresponding openings through side walls of the shield for receiving the fingers and locking the shield in the first position surrounding the needle cannula.

4. The safety shield system defined in claim 3, wherein the clip member includes a common base with each of the resilient lateral projections extending from the base.

5. The safety shield system defined in claim 4, wherein the spring is a spiral spring having one end abutting the common base and an opposed end biased against the shield.

6. The safety shield system defined in claim 1, further comprising a removable cup-shaped cap having an open end received over said shield.

7. The safety shield system as defined in claim 6, wherein the cap includes inwardly projecting ribs which are disposed within grooves of the shield for preventing retraction of the shield relative to the hub member when the cap is received over the shield.