Automatic injector with anti-coring needle

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 with 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 defining a longitudinal passage therethrough, said cylindrical wall including opposing first and second wall portions, said first wall portion having a forward tip portion terminating in a forward end tip, said second wall portion terminating at a position rearwardly spaced from said end tip, said forward tip portion being bent in a manner to shield the entire cross-section of said longitudinal passage, said cross section of said longitudinal passage perpendicular to a longitudinal axis of said hollow rigid tubing;
• 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.

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 defining a longitudinal passage therethrough, said cylindrical wall including opposing first and second wall portions, said first wall portion having a forward tip portion terminating in a forward end tip, said second wall portion terminating at a position rearwardly spaced from said end tip, said forward tip portion being bent in a manner to shield the entire cross-section of said longitudinal passage, said cross section of said longitudinal passage perpendicular to a longitudinal axis of said needle;
• wherein said forward tip portion is bent at an angle approximately between 51 degrees and 100 degrees;
• said angle being defined as the angle between a tangent to a curvature of an outer surface at said end tip and the longitudinal axis of said 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.

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 defining a longitudinal passage therethrough, said cylindrical wall including opposing first and second wall portions, said first wall portion having a forward tip portion terminating in a forward end tip, said second wall portion terminating at a position rearwardly spaced from said end tip, said forward tip portion having a back ground lancet wherein back grinds of said lancet are ground at an angle of about 120 degrees measured in relation to a base line extending transversely across the forward tip portion, the forward tip portion being bent at an angle approximately between 51 degrees and 100 degrees;
• said angle being defined as the angle between a tangent to a curvature of an outer surface at said end tip and a longitudinal axis of said needle;
• 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.

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 defining a linear longitudinal passage entirely there through, said cylindrical wall including opposing first and second wall portions, said first wall portion having a forward tip portion terminating in a forward end tip, said second wall portion terminating at a position rearwardly spaced from said end tip, said forward tip portion being bent in a manner to shield the entire cross-section of said longitudinal passage, said cross section of said longitudinal passage perpendicular to a longitudinal axis of said hollow rigid tubing;
• said needle comprising an enlarged rearward portion constructed and arranged for engagement with said plunger;
• 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.

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 carriage;
• 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 defining a linear longitudinal passage entirely there through, said cylindrical wall forming the boundary of the linear longitudinal passage, said cylindrical wall including opposing first and second wall portions, said first wall portion having a forward tip portion terminating in a forward end tip, said second wall portion terminating at a position rearwardly spaced from said end tip;
• said forward tip portion is bent at an angle approximately between 51 degrees and 100 degrees;
• said angle being defined as the angle between a tangent to a curvature of an outer surface at said end tip and a longitudinal axis of said needle;
• wherein said needle comprises an enlarged rearward portion constructed and arranged for engagement with said plunger;
• 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.

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 defining a longitudinal passage extending there through, said cylindrical wall having an inner surface and including opposing first and second wall portions, said first wall portion having a forward tip portion terminating in a forward end tip, said second wall portion terminating at a position rearwardly spaced from said end tip, said forward tip portion being bent;
• an enlarged rearward portion constructed and arranged for engagement with said plunger, and
• a lumen opening having a front pointed portion comprising a lancet shaped tip having a facet grinding at an angle, said forward tip bent in a curve directed toward a longitudinal axis of said cylindrical wall so as to constitute a shield to said lumen opening, said tip comprising primary and symmetrical secondary and tertiary facets, said secondary and tertiary facets each ground at the outside surface of the needle at an angle ranging from 120 degrees to 130 degrees measured in relation to a base line extending transversely across the forward tip portion;
• 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.

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;
• a needle normally disposed within said housing, and 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 in response to said predetermined actuating procedure, said needle comprising:
• a hollow rigid tubing having a cylindrical wall that includes opposing first and second wall portions, said first wall portion having a forward tip portion terminating in a forward end tip, said second wall portion terminating at a position rearwardly spaced from said end tip, said forward end tip portion having a back ground lancet wherein back grinds of said forward end tip portion are at an angle ranging from 120 degrees to 130 degrees in relation to a base line extending transversely across the forward tip portion;
• 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 to expel said medicament through said needle and into the flesh of an individual.

A method of injecting a medicament with an automatic injector, the injector comprising a housing, a seal structure disposed toward a forward end of said housing, a cartridge contained within said housing, a charge of medicament contained in said cartridge, a plunger movable through said cartridge toward a generally forward end thereof in response to an actuating procedure, a needle disposed within said housing and having a linear longitudinal passage entirely through the needle, said needle projectable from the forward end of said housing through said seal structure, said needle communicable with said medicament so that movement of said plunger through said cartridge forces said medicament through the longitudinal passage of said needle in response to said actuating procedure, a releasable energy source responsive to said actuating procedure to project said needle from the forward end of the housing and slidingly drive said plunger through said cartridge to expel said medicament through said needle;

• said method comprising:
• releasing said energy source;
• forcing said medicament through said linear longitudinal passage of said needle;
• moving said needle forwardly within said housing at a speed of less than 680 inches/s as said needle penetrates said seal structure;
• penetrating said seal structure with said needle having a forward tip portion bent so as to shield the entire cross-section of the longitudinal passage, said cross section of the longitudinal passage perpendicular to a longitudinal axis of said needle;
• and
• expelling said medicament through said needle.