NEEDLE MOUNTING FEATURE FOR ENSURING PROPER RECONSTITUTION SEQUENCE

• US 20110201999A1
• Filed: 09/18/2009
• Published: 08/18/2011
• Est. Priority Date: 09/18/2008
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Fayyaz, Asif, Patel, Atul, Vedrine, Lionel, Cronenberg, Richard A., Sweeney, Matthew D.
• Granted Patent: US 8,556,862 B2
• Time in Patent Office: Days
• US Class Current: 604/89
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2496 via pivot
• CPC Class Codes: A61M 2005/3104 Caps for syringes without needle
• CPC Class Codes: A61M 5/2066 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/2448 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/3134 characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula
• CPC Class Codes: A61M 5/3243 being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel devices for protecting guide needles in combination with catheters A61M25/0612
• CPC Class Codes: A61M 5/344 using additional parts, e.g. clamping rings or collets
• CPC Class Codes: A61M 5/347 rotatable, e.g. bayonet or screw A61M5/344 takes precedence

Abstract

A medical injector is provided herein having a body and a needle mounting surface movable relative to the body, the needle mounting surface having features for mounting a needle thereto. In an initial state, the needle mounting surface is disposed within the body with no needle mounted thereto. With relative movement between the body and the needle mounting surface, the needle mounting surface is urged out of the body. Advantageously, a medical injector is provided which ensures proper sequence in preparation of the device, particularly with respect to the step of allowing mounting of a medical needle to the device subsequent to preparation of the medicament to be administered.

Claims

1. A medical injector comprising:

a body; and

,

a needle mount movable relative to said body, said needle mount having features for mounting a needle thereto,

wherein, in an initial state, said needle mount being disposed within said body with no needle mounted thereto, and

wherein, with relative movement between said body and said needle mount, said needle mount is urged out of said body to extend therefrom in an extended state.

2. A medical injector as in claim 1, further comprising a drug cartridge disposed in said body, said needle mount being defined thereon, said drug cartridge being movable relative to said body.

3. A medical injector as in claim 2, further comprising a releasable retainer for retaining said needle mount within said body.

4. A medical injector as in claim 2, wherein said drug cartridge accommodates at least two mixable components, wherein, in said initial state, said mixable components being separate, and, wherein, said relative movement between said body and said needle mount being achieved with mixing of said mixable components.

5. A medical injector as in claim 1, further comprising locking means for locking said needle mount in said extended state.

6. A medical injector as in claim 1, further comprising a plurality of spreadable leaves, said leaves being inherently biased to a closed state, wherein, upon said relative movement between said body and said needle mount, said needle mount passes through said leaves to said extended state.

7. A medical injector comprising:

a body;

a needle mount, said needle mount having features for mounting a needle thereto;

a drug reservoir disposed in said body, said reservoir accommodating at least first and second mixable components; and

,

an overcap releasably attached to said body and configured to cover said needle mount while attached to said body so as to prevent a needle being mounted to said needle mount; and

,

wherein, said overcap is released from said body with said mixable components being mixed, said release of said overcap permitting a needle to be mounted to said needle mount.

8. A medical injector comprising:

a body;

a drug reservoir disposed in said body, said reservoir accommodating at least first and second mixable components;

a plurality of resilient members which are deflectable between first and second states, wherein, in said first state, said members collectively define a needle mount configured to have a needle mounted thereto, wherein, in said second state, said members being disposed radially outwardly from said first state such that said needle mount is sufficiently disrupted so as to prevent the needle from being mounted thereto; and

,

a slidable collet configured to urge said members from said second state to said first state,

wherein, in an initial state, said resilient members are in said second state, and,

wherein, said collet urges said members to said first state with said mixable components being mixed.