| US 7,462,168 B2 | ||
| Safety pen needle with passive safety shield system | ||
| David R. Stonehouse, Cambridge (United Kingdom); and Eric D. Listenberger, Morristown, N.J. (US) | ||
| Assigned to Becton, Dickinson and Company, Franklin Lakes, N.J. (US) | ||
| Filed on Jan. 23, 2007, as Appl. No. 11/626,205. | ||
| Prior Publication US 2008/0177237 A1, Jul. 24, 2008 | ||
| Int. Cl. A61M 5/32 (2006.01) | ||
| U.S. Cl. 604—198 [604/192] | 7 Claims |
| 7. A passive safety shield system for an injection pen needle, comprising:
a needle hub
a needle mounted on the hub and having an injection end and a non-injection end, wherein the hub has a recess surrounding
the non-injection end of the needle to receive a pen-injector;
an injection end shield moving coaxially on the hub and having an aperture to permit passage of the needle through the injection
end shield;
a substantially tubular sleeve moving coaxially on the hub;
a shield fastening element on the sleeve cooperating with a corresponding element on the injection end shield to fasten the
injection end shield to the sleeve;
a hub fastening element on the sleeve cooperating with a corresponding element on the hub to fasten the hub to the sleeve;
a spring biasing the injection end shield toward the injection end of the pen needle;
wherein the sleeve is engaged with the hub and the injection end shield to hold the injection end shield in a position covering
the injection end of the needle before an injection, and to lock the injection end shield in a position covering the injection
end after an injection or in the event of an accidental use;
further comprising a non-injection end shield situated on the hub and having an aperture to permit passage of the non-injection
end of the needle;
at least one engaging element on the non-injection end shield engaging a corresponding element on the hub;
wherein, when the pen-injector is removed from the hub, the engaging element on the non-injection end shield cooperates with
the corresponding element on the hub to lock the non-injection end shield in a position covering the non-injection end of
the needle, and
wherein threads on the pen injector mate with the threads on the non-injection end shield.
|