Pen needle and safety system

• US 7,314,464 B2
• Filed: 08/17/2005
• Issued: 01/01/2008
• Est. Priority Date: 08/02/2000
• Status: Expired due to Term

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: De Salvo, David, Giambattista, Lucio
• Primary Examiner(s): Sirmons; Kevin C.
• Assistant Examiner(s): GILBERT, ANDREW M
• Application Number:
  US11/205,919
• Publication Number:
  US 20050277895A1
• Time in Patent Office: 867 Days
• Field of Search: 604/110, 604/198, 604/263, 604/192, 604/195
• US Class Current: 604/198
• CPC Class Codes: A61M 2005/3104 Caps for syringes without needle
• CPC Class Codes: A61M 2005/3215 Tools enabling the cap placement
• 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 5/002 Packages specially adapted therefor, e.g. for syringes or needles, kits for diabetics needle protection, e.g. caps, A61M5/3202; for sharps A61B50/3001
• 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
• CPC Class Codes: A61M 5/5086 for indicating if defective, used, tampered with or unsterile

Abstract

A safety shield system having a needle assembly with a safety shield movable from a first position enclosing an end of a needle cannula, to a second position exposing the end of the needle cannula for injection, to a third position lockingly enclosing the end of a needle cannula. The safety shield system permits retraction of the safety shield during use, but extends the shield enclosing the needle cannula in a locked position following use. The safety shield system also has a cap for receiving the needle assembly and lockingly enclosing another end of the needle cannula. Thus, both ends of a double-ended needle cannula are lockingly enclosed following use of the needle assembly of the inventive safety shield system.

Claims

1. A safety shield system comprising:

a needle assembly comprising;

a hub member;

a needle cannula carried by said hub member and having sharpened first and second ends;

a clip member on said hub member and having a plurality of resilient fingers;

first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; and

means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and

second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula.

2. A safety shield system as recited by claim 1, wherein said first shielding means comprises a generally tubular shield.

3. A safety shield system as recited by claim 1, wherein said second shielding means comprises a cap that lockingly receives said open end of said first shielding means.

7. A safety shield system as recited by claim 1, wherein said clip member includes a base integrally formed with said resilient fingers.

8. A safety shield system as recited by claim 1, wherein said means for biasing comprises a spring between said hub member and said first shielding means.

9. A safety shield system as recited by claim 1, wherein said second shielding means is sized and shaped to removably receive said generally closed end of said first shielding means, said safety shield system further comprising means for preventing movement of said first shielding means out of said first position when said generally closed end of said first shielding means is removably received by said second shielding means.

10. A safety shield system as recited by claim 9, wherein said means for preventing movement comprises a groove defined in said first shielding means and a rib defined on said second shielding means and disposed in said groove.

4. A safety shield system comprising:

a needle assembly comprising

a hub member;

a needle cannula carried by said hub member and having sharpened first and second ends;

a clip member on said hub member and having a resilient finger;

first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula;

means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and

second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula;

wherein said first shielding means further comprises means for lockingly engaging said resilient finger as said first shielding means is moved from said second position to said third position, and wherein said means for lockingly engaging said resilient finger comprises an opening defined in said first shielding means, said opening being sized and shaped such that said resilient finger passes over said opening as said first shielding means is moved from said first position to said second position, and so as to capture said resilient finger as said first shielding means is moved from said second position to said third position.

5. A safety shield system as recited by claim 4, wherein said clip member comprises a plurality of resilient fingers.

6. A safety shield system as recited by claim 5, wherein said first shielding means comprises a plurality of openings for lockingly engaging said plurality of resilient fingers.

11. A safety shield system comprising:

a needle assembly comprising;

a hub member;

a needle cannula carried by said hub member and having sharpened first and second ends;

a clip member on said hub member and having a resilient finger;

first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula;

means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and

second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula; and

means for preventing rotation between said hub member and said first shielding means, wherein said means for preventing rotation comprises a plurality of radially spaced grooves defined in said first shielding means and a plurality of radially spaced ribs defined on said hub member.

12. A safety shield system comprising:

a needle assembly comprising;

a hub member;

a needle cannula carried by said hub member and having sharpened first and second ends;

a clip member on said hub member and having a resilient finger;

a tubular shield having an open end near said first end of said needle cannula, and a generally closed end near said second end of said needle cannula, said generally closed end having an aperture defined therethrough, said tubular shield being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; and

a spring for biasing said tubular shield toward said first and third positions; and

a first cap to lockingly receive said open end of said tubular shield to lockingly enclose said sharpened first end of said needle cannula,

wherein said first cap is sized and shaped to removably receive said generally closed end of said tubular shield, and

further comprising means for preventing movement of said tubular shield out of said first position when said generally closed end of said tubular shield is removably received by said first cap,

wherein said means for preventing movement comprises a groove defined in said tubular shield and a rib defined on said first cap and disposed in said groove.

13. A safety shield system as recited by claim 12, wherein said tubular shield further comprises an opening defined in a sidewall for lockingly engaging said resilient finger as said tubular shield is moved from said second position to said third position.

14. An injection system comprising:

a pen injector having means for receiving a needle assembly;

a needle assembly removably securable to said pen injector and comprising;

a hub member complementarily sized and shaped with said receiving means of said pen injector for removably securing said needle assembly to said pen injector;

a needle cannula carried by said hub member and having sharpened first and second ends;

a clip member on said hub member and having a resilient finger;

first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; and

means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and

second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula after said needle assembly is removed from said pen injector.