Saf-t-jet

Claim 2

In a medicament injector comprising a cylindrical vial having an open end and a closed end, a resilient plug inserted at least partially through said open end engaging the walls of said vial with a press fit, a hollow cylindrical member having an inner wall, an upper end and one closed lower end, a thin long fluid passage including sharp needle ends, said passage extending inwardly from said cylindrical member with the sharpended inner end terminating within the walls adjacent the upper end of said cylindrical member, cooperating threaded rotating and interlocking means on said cylindrical member and said plug, whereby upon threadably interlocking the said plug with the said cylindrical member said vial is first held in an assembled but non-operating position and upon further threadable interlocking of said plug with said cylindrical member said plug is pierced by said elongated fluid passage and said passage communicates with said vial and said plug is locked securely to said cylindrical member to permit aspiration upon withdrawal of said vial or to permit expulsion of the contents of said vial upon exertion of pressure on said vial; the improvement including lateral support means provided adjacent said upper wall end between said walls of said cylindrical member and said thin long fluid passage in proximity to said sharpened inner end to maintain said passage essentially concentric with respect to said cylindrical member.

Claim 3

The device of claim 1 wherein said fluid passage is translucent.

Claim 4

The injector of claim 1 wherein the lateral support means surrounds said thin long fluid passage.

Claim 5

The injector of claim 1 wherein the fluid passage is a hollow length Of plastic.

Claim 6

The injector of claim 1 wherein the fluid passage is a metal needle.

Claim 7

The injector of claim 1 wherein said cylindrical member is provided with an external surrounding barrel.

Claim 8

The injector of claim 6 wherein the barrel has externally extending gripping means.

Claim 9

The injector of claim 6 wherein the closed end of said cylindrical member is provided with a Luer skirt and said needle has external projections which engage said skirt.

Claim 10

In a medicament injector comprising a cylindrical vial having an open end and a closed end, a resilient plug inserted at least partially through said open end engaging the walls of said vial with a press fit, a hollow cylindrical member having an inner wall, an upper end and one closed lower end, a thin long fluid passage including sharp needle ends, said passage extending inwardly from said cylindrical member with the sharpended inner end terminating within the walls adjacent the upper end of said cylindrical member, cooperating threaded rotating and interlocking means on said cylindrical member and said plug, whereby upon threadably interlocking the said plug with the said cylindrical member said vial is first held in an assembled but non-operating position and upon further threadable interlocking of said plug with said cylindrical member said plug is pierced by said elongated fluid passage and said passage communicates with said vial and said plug is locked securely to said cylindrical member to permit aspiration upon withdrawal of said vial or to permit expulsion of the contents of said vial upon exertion of pressure on said vial; the improvement including lateral support means provided adjacent said upper wall end between said walls of said cylindrical member and said thin long fluid passage in proximity to said sharpened inner end to maintain said passage essentially concentric with respect to said cylindrical member and said plug bottoms out against said lateral support means when said threads are made up to allow further relative rotational force between said vial and said cylindrical member to break the seizure of the plug to the walls of the vial.

Claim 11

In a medicament injector comprising a cylindrical vial having an open end and a closed end, a resilient plug inserted at least partially through said open end engaging the walls of said vial with a press fit, a hollow cylindrical member having an inner wall, an upper end and one closed lower end, a thin long fluid passage including sharp needle ends, said passage extending inwardly from said cylindrical member with the sharpended inner end terminating within the walls adjacent the upper end of said cylindrical member, cooperating threaded rotating and interlocking means on said cylindrical member and said plug, whereby upon threadably interlocking the said plug with the said cylindrical member said vial is first held in an assembled but non-operating position and upon further threadable interlocking of said plug with said cylindrical member said plug is pierced by said elongated fluid passage and said passage communicates with said vial and said plug is locked securely to said cylindrical member to permit aspiration upon withdrawal of said vial or to permit expulsion of the contents of said vial upon exertion of pressure on said vial; the improvement including lateral support means provided adjacent said upper wall end between said walls of said cylindrical member and said thin long fluid passage in proximity to said sharpened inner end to maintain said passage essentially concentric with respect to said cylindrical member and said plug bottoms out against said lateral support means when said threads are made up to allow further relative rotational force between said vial and said cylindrical member to break the seizure of the plug to the walls of the vial.