Hypodermic needle and support structure therefor

Abstract

1. A hypodermic needle support structure comprising in combination .[.;.]. .Iadd.: .Iaddend.a plastic main support member having .Iadd.an inner end, and an outer end portion terminating in an outer end; .Iaddend.a passage extending longitudinally .[.therethrough which provides.]. .Iadd.through said support member to provide .Iaddend.access to the interior of said support member from either end thereof.Iadd.; said longitudinally extending passage including a smaller diameter portion adjacent said outer end and a larger diameter portion adjacent to said smaller diameter portion; means defining a shoulder between said smaller diameter portion and said larger diameter portion; .[.with said support member having at the outer end.]. .Iadd.; said outer end portion of said support member including .Iaddend. a rigid support section.[.,.].; a generally tubular metal eyelet member .Iadd.; a hypodermic needle cannula; said eyelet member being .Iaddend.disposed in fluid-sealing engagement with said support section and forming a fixed fluid-sealing engagement with .[.a.]. .Iadd.said .Iaddend.hypodermic needle cannula, said eyelet member having .[.at the inner end thereof a.]. .Iadd.an inner end disposed within said smaller diameter portion of said support member and an outer end extending axially through said outer end of said support member; a radially outwardly extending skirt section on said inner end of said eyelet member; said skirt section having an outer diameter which is larger than the diameter of said smaller diameter portion of said longitudinally extending passage in said support member and which is in fluid-sealing engagement with said shoulder between said smaller and larger diameter portions of said longitudinally extending passage; said .Iaddend.skirt section .[.with.]. .Iadd.having .Iaddend.a diameter larger than the outer diameter of said hypodermic needle cannula and .[.with.]. said skirt section forming said fluid-sealing engagement with said support section, and said eyelet member having extending axially from the outer end of said skirt section a tubular stem section which extends longitudinally beyond the end of said support section, and said stem section forming said fixed fluid-sealing engagement with said hypodermic needle cannula at a point spaced axially beyond said outer end of said support section .Iadd.the diameter of said stem section of said eyelet member being smaller, throughout its entire length, than the smallest diameter portion of said longitudinally extending passage, whereby said eyelet member may be inserted through said inner end of said support member and said stem section may pass through said outer end of said support member until said skirt section engages said shoulder between said smaller and larger portions of said longitudinally extending passage in said support member..Iaddend.

What we claim as new and desired to be secured by Letters Patent is set forth in the attached claims: 
     
       1. A hypodermic needle support structure comprising in combination.[.;.]..Iadd.: .Iaddend.a plastic main support member having .Iadd.an inner end, and an outer end portion terminating in an outer end; .Iaddend.a passage extending longitudinally .Iadd.through said support member to provide .Iaddend..[.therethrough which provides.]. access to the interior of said support member from either end thereof .Iadd.; said longitudinally extending passage including a smaller diameter portion adjacent said outer end and a larger diameter portion adjacent to said smaller diameter portion; means defining a shoulder between said smaller diameter portion and said larger diameter portion; .Iaddend..[.with said support member having at the outer end.]. .Iadd.; said outer end portion of said support member including .Iaddend.a rigid support section.[.,.]. ; a generally tubular metal eyelet member .Iadd.; a hypodermic needle cannula; said eyelet member being .Iaddend.disposed in fluid-sealing engagement with said support section and forming a fixed fluid-sealing engagement with .[.a.]. .Iadd.said .Iaddend.hypodermic needle cannula, said eyelet member having .[.at the inner end thereof.].  .Iadd.an inner end disposed within said smaller diameter portion of said support member and an outer end extending axially through sid outer end of said support member; a radially outwardly extending skirt section on said inner end of said eyelet member; said skirt section having an outer diameter which is larger than the diameter of said smaller diameter portion of said longitudinally extending passage in said support member and which is in fluid-sealing engagement with said shoulder between said smaller and larger diameter portions of said longitudinally extending passage; said .Iaddend.skirt section .[.with.]. .Iadd.having .Iaddend.a diameter larger than the outer diameter of said hypodermic needle cannula and .[.with.]. said skirt section forming said fluid-sealing engagement with said support section, and said eyelet member having extending axially from the outer end of said skirt section a tubular stem section which extends longitudinally beyond the end of said support section, and said stem section forming said fixed fluid-sealing engagement with said hypodermic needle cannula at a point spaced axially beyond said outer end of said support section .Iadd.the diameter of said stem section of said eyelet member being smaller, throughout its entire length, than the smallest diameter portion of said longitudinally extending passage, whereby said eyelet member may be inserted through said inner end of said support member and said stem section may pass through said outer end of said support member until said skirt section engages said shoulder between said smaller and larger portions of said longitudinally extending passage in said support member.Iaddend..  .[.2. A hypodermic needle support structure comprising in combination; a plastic main hypodermic needle hub member having a passage extending longitudinally therethrough which provides access to the interior of said hub member from either end thereof with said hub member having at the outer end a rigid support section, a generally tubular metal eyelet member disposed in fluid-sealing engagement with said support section and forming a fixed fluid-sealing engagement with a hypodermic needle cannula, said eyelet member having at the inner end thereof a skirt section with a diameter larger than the outer diameter of said hypodermic needle cannula and with said skirt section disposed within said rigid support section and forming said fluid-sealing fixed engagement with said support section, and said eyelet member having extending axially from the outer end of said skirt section a reduced diameter tubular stem section which extends longitudinally beyond the end of said support section, and said stem section forming said fixed fluid-sealing engagement with said hypodermic needle cannula at a point 
     
     
        spaced axially beyond said outer end of said support section..]. 3. A hypodermic needle support structure comprising in combination.[.;.]..Iadd.: .Iaddend.a plastic main hypodermic syringe barrel member having .Iadd.an inner end, and an outer end portion terminating in an outer end; .Iaddend.a passage extending longitudinally .Iadd.through said barrel member to provide .Iaddend. .[.therethrough which provides.]. access to the interior of said barrel member from either end thereof .Iadd.; said longitudinally extending passage including a smaller diameter portion adjacent said outer end and a larger diameter portion adjacent to said smaller diameter portion; means defining a shoulder between said smaller diameter portion and said larger diameter portion; .Iaddend. .[.with said syringe barrel member having at the outer end.]. .Iadd.said outer end portion of said barrel member including .Iaddend.a rigid support section, a generally tubular metal eyelet member .Iadd.; a hypodermic needle cannula; said eyelet member being .Iaddend.disposed in fluid-sealing engagement with said support section and forming .[.a.]. .Iadd.said .Iaddend.fixed fluid-sealing engagement with a hypodermic needle cannula, said eyelet member having .Iadd. an inner end disposed within said smaller diameter portion of said barrel member and an outer end extending axially through said outer end of said barrel member; a radially outwardly extending skirt section on said inner end of said eyelet member; said skirt section having an outer diameter which is larger than the diameter of said smaller diameter portion of said longitudinally extending passage in said barrel member and which is in fluid-sealing engagement with said shoulder between said smaller and larger diameter portions of said longitudinally extending passage; said .Iaddend. .[.at the inner end thereof a.]. skirt section .[.with.]. .Iadd.having .Iaddend.a diameter larger than the outer diameter of said hypodermic needle cannula and with said skirt section disposed within said rigid support section and forming said fluid-sealing engagement with said support section, and said eyelet member having extending axially from the outer end of said skirt section a reduced diameter tubular stem section which extends longitudinally beyond the end of said support section, and said stem section forming said fixed fluid-sealing engagement with said hypodermic needle cannula at a point spaced longitudinally beyond said outer end of said support section .Iadd.the diameter of said stem section of said eyelet member being smaller, throughout its entire length, than the smallest diameter portion of said longitudinally extending passage, whereby said eyelet member may be inserted through said inner end of said barrel member and said stem section may pass through said outer end of said barrel member until said skirt section engages said shoulder between said smaller and larger portions of said longitudinally extending passage in said barrel member.Iaddend.. .Iadd. 4. A hypodermic needle support structure comprising in combination: a plastic main support member having an internal peripheral wall defining an axial passage extending longitudinally therethrough which provides access to the interior of said support member from either end thereof with said support member having at the outer end a rigid support section, said axial passage including a first passage section and a second passage section axially separated from one another by means of an annular shoulder on said peripheral wall of said passage; said first passage section being disposed within said rigid support section and being smaller in diameter than said second passage section; a generally tubular metal eyelet member disposed in fluid-sealing engagement with said support section and forming a fixed fluid-sealing engagement with a hypodermic needle cannula, said eyelet member having at the inner end thereof a skirt section with a diameter larger than the outer diameter of said hypodermic needle cannula and with said skirt section having an outer diameter which is larger than the diameter of said first passage section, said skirt section being forcibly seated against said annular shoulder on said peripheral wall of said passage to form said fluid-sealing engagement with said support section of said main support, and said eyelet member having extending axially from the outer end of said skirt section a tubular stem section which extends longitudinally beyond the end of said support section of said main support member, and said stem section forming said fixed fluid-sealing engagement with said hypodermic needle cannula at a point spaced axially beyond said outer end of said main support section; the diameter of said tubular stem section of said eyelet member being smaller, throughout its entire length, and the smallest diameter of said longitudinally extending passage, whereby said eyelet member may be inserted through said inner end of said support member and said stem section may pass through said outer end of said support member until said skirt section engages said annular shoulder between said first and second passage sections. .Iaddend. .Iadd. 5. A hypodermic needle support structure comprising in combination: a plastic main support member having a passage extending longitudinally therethrough which provides access to the interior of said support member from either end thereof, said passage including a first passage section and a second passage section separated from one another by an annular shoulder, said support member having at its outer end a rigid support section, a generally tubular metal eyelet member disposed in fluid-sealing engagement with said support section and forming a fixed fluid-sealing engagement with a hypodermic needle cannula, said eyelet member having at the inner end thereof a radially outwardly extending skirt section, said skirt section having an outer diameter larger than the inner diameter of said first passage section in said support member and smaller than said second passage section in said support member, said skirt section sealingly engaging said annular shoulder and thereby forming said fluid-sealing engagement with said support section, and said eyelet member having extending axially from the outer end of said skirt section a tubular stem section which extends longitudinally beyond the end of said support section, and said stem section forming said fixed fluid-sealing engagement with said hypodermic needle cannula at a point spaced axially beyond said outer end of said support section the diameter of said tubular stem section of said eyelet member being smaller, throughout its entire length, and the smallest diameter of said longitudinally extending passage, whereby said eyelet member may be inserted through said inner end of said support member and said stem section may pass through said outer end of said support member until said skirt section engages said annular shoulder between said first and second passage sections. .Iaddend.