| US 7,569,035 B1 | ||
| Automatic injector with anti-coring needle | ||
| John G. Wilmot, Mount Airy, Md. (US); John Whittier, Columbia, Md. (US); Robert L. Hill, Abington, Md. (US); Seth P. Cain, Baltimore, Md. (US); and C. Michael Mesa, Boyds, Md. (US) | ||
| Assigned to Meridian Medical Technologies, Inc., Columbia, Md. (US) | ||
| Filed on Nov. 02, 2001, as Appl. No. 9/985,466. | ||
| Int. Cl. A61M 5/00 (2006.01) | ||
| U.S. Cl. 604—187 | 32 Claims |

| 1. An automatic injector comprising:
a housing having a rearward end and a forward end;
a seal structure disposed toward the forward end of said housing;
a cartridge contained within said housing;
a charge of medicament contained in said cartridge;
a plunger normally disposed in a generally rearward end of said cartridge and movable through said cartridge toward a generally
forward end thereof in response to an actuating procedure, said movable plunger rearwardly confining said medicament within
said cartridge;
a needle normally disposed within said housing, said needle being projectable from the forward end of said housing through
said seal structure, said needle being communicable with said medicament so that movement of said plunger through said cartridge
forces said medicament through said needle and into the flesh of an individual in response to said predetermined actuating
procedure, said needle comprising:
a hollow rigid tubing having a cylindrical wall, the cylindrical wall having an inner surface and outer surface;
a lumen opening having a front pointed portion comprising a lancet shaped tip having a facet grinding at an angle, said tip
bent in a curve directed toward a longitudinal axis of said cylindrical wall so as to shield the entire cross section of said
lumen opening, said cross section of said lumen opening perpendicular to a longitudinal axis of said hollow rigid tubing,
said tip comprising primary and secondary facets, said secondary facets ground at an angle at the inner surface of the needle;
and
a releasable energy source releasable in response to said predetermined actuating procedure to project said needle from the
forward end of the housing and slidingly drive said plunger through said cartridge in sealed relation to expel said medicament
through said needle and into the flesh of an individual.
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