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1. (WO1993017732) DISPOSITIF MEDICAL D'INJECTION COMPRENANT UN SYSTEME DE SECURITE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique
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1. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle, the improvement for minimizing the chance for damage to the injection end of the hypodermic needle comprising:
said outer end being bell-shaped with a point of sliding contact on the hypodermic needle located behind the injection end.

2. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 1 wherein:
said bell-shaped outer end of the hypodermic needle is transparent whereby the injection end of the hypodermic needle can be visually inspected through said bell-shaped outer end.

3. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle is carried by a medical device employing the hypodermic needle, the improvement for making the hypodermic needle attachable to and releasable from the medical device comprising:
a) a projection extending from the medical device; and,
b) attachment means included with the base for releasably attaching the hypodermic needle in combination with the retractable sleeve to said projection.

4. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 3 wherein: a) said projection is a cylindrical projection having a cylindrical bore therein; and,
b) said attachment means comprises a cylindrical member sized and shaped to slidably fit within said cylindrical bore.

5. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 4 wherein:
a) said cylindrical bore has internal threads formed therein; and,
b) said cylindrical member has external projections which threadedly engage said internal threads whereby said cylindrical member is threaded into said cylindrical bore to releasably attach the hypodermic needle in combination with the retractable sleeve to said projection.

6. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 3 wherein:
a) the base includes radial longitudinal gripping vanes; and additionally comprising,
b) a hard cover disposed over the retractable sleeve and supported by said vanes, said hard cover having interacting means on an inner surface thereof for radially pushing said vanes to release said attachment means from said projection when said hard cover is rotated whereby said hard cover can be used to attach the hypodermic needle and the retractable sleeve in combination therewith to said projection and release the hypodermic needle and the retractable sleeve in combination therewith from said projection.

7. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle is carried by a medical device employing the hypodermic needle, the improvement for making the position of the injection end of the hypodermic needle determinable while still covered by the retractable sleeve comprising:
a) a projection extending from the medical device; and,
b) attachment means included with the base for releasably attaching the hypodermic needle in combination with the retractable sleeve to said projection; wherein,
c) the base comprises a first part carrying the bottom end of the hypodermic needle and a second part carrying bottom ends of the plurality of longitudinal slats; and additionally,
d) the base includes means for placing the injection end of the hypodermic needle in a pre-determined positional orientation with respect to the retractable sleeve.

8. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 7 wherein:
said means for placing the injection end of the hypodermic needle in a pre-determined positional orientation with respect to the retractable sleeve comprises said first part and said second part being parts of a unitary structure comprising the base with the injection end of the hypodermic needle carried thereby in said pre-determined positional orientation with respect to the retractable sleeve.

9. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 7 wherein:
said means for placing the injection end of the hypodermic needle in a pre-determined positional orientation with respect to the retractable sleeve comprises mating portions of said first part and said second part which only mate when the injection end of the hypodermic needle is in said pre-determined positional orientation with respect to the retractable sleeve.

10. The improvement to a hypodermic needle disposed 5 within a retractable sleeve of claim 7 and additionally comprising:
indicia means carried by the retractable sleeve for indicating to a user said pre-determined positional orientation of the injection end of the hypodermic needle with respect to ID the retractable sleeve whereby a user can place the injection end of the hypodermic needle in a desired positional orientation before retracting the retractable sleeve.

11. The improvement to a hypodermic needle disposed is within a retractable sleeve of claim 10 wherein the retractable sleeve has a bell end covering the injection end of the hypodermic needle and additionally comprising:
a bottom portion of said bell end being beveled backwards whereby the hypodermic needle is more easily used 20 for intradermal and sub-cutaneous procedures.

12. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle

25 and an outer end slidably covering an injection end of the hypodermic needle wherein a sliding collar and bias spring are disposed over the retractable sleeve with the spring disposed between the base and the sliding collar to bias the sliding collar towards the outer end, the improvement for preventing

3 o undesired movement of the spring comprising:
' gripping tab means carried by the base for gripping and holding a base end of the spring.

13. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle wherein a sliding collar and bias spring are disposed over the retractable sleeve with the spring disposed between the base and the sliding collar to bias the sliding collar towards the outer end and the slats have front and rear projections extending therefrom to prevent the sliding collar from sliding off the outer end and to releasably latch the sliding collar in a retracted position for use, the improvement for increasing the reliability of operation comprising:
the projections being triangles in shape having a vertical side adjacent the base and a sloped side facing the outer end.

14. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 13 wherein additionally:
the sliding collar has an extended inner cylindrical portion which fits under a plurality of turns of the spring when the sliding collar is moved to a retracted position behind rear ones of the projections.

15. The improvement to a hypodermic needle disposed within a retractable sleeve of claim 13 wherein additionally:
the sliding collar has an extended outer cylindrical portion which covers and protects front ones of the projections from unwanted depression and release of the sliding collar when the sliding collar is in an extended position held by said front ones of the projections.

16. In a hypodermic needle disposed within a retractable sleeve extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle wherein the retractable sleeve includes a portion containing a plurality of longitudinal folding slats formed by a plurality of longitudinal slots in the retractable sleeve, the improvement for dental use and the like comprising:
the plurality of longitudinal slots being located longitudinally offset more adjacent the base than the outer end whereby the plurality of longitudinal folding slats fold adjacent the base and an extended portion of the retractable sleeve adjacent an exposed injection end of the hypodermic needle is not deformed outward during retraction of the outer end.

17. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle wherein a sliding collar and bias spring are disposed over the retractable sleeve with the spring disposed between the base and the sliding collar to bias the sliding collar towards the outer end and the slats have front and rear projections extending therefrom to control movement of the sliding collar, the improvement to make the hypodermic needle usable only once comprising:
a) the projections being triangles in shape with rear ones of the projections having a vertical side adjacent the base and a sloped side facing the outer end and front ones of the projections having a sloped side adjacent the base and a vertical side facing the outer end; and,
b) retaining ridge means for not allowing the sliding collar to pass thereover disposed adjacent the outer end and past said front ones of the projections towards the outer end whereby the locking collar when released from a retracted position held by said rear ones of the projections is moved over said front ones of the projections by a biasing force of the spring and locked between said front ones of the projections and said retaining ridge means.

18. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle wherein a sliding collar and bias spring are disposed over the retractable sleeve with the spring disposed between the base and the sliding collar to bias the sliding collar towards the outer end and the slats have front and rear projections extending therefrom to prevent the sliding collar from sliding off the outer end and to releasably latch the sliding collar in a retracted position for use, the improvement for increasing the reliability of operation comprising:
thickened strongback areas in the plurality of longitudinal slats extending from respective ones of the front projections toward the base.

19. In a hypodermic needle disposed within a retractable sleeve comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle wherein a sliding collar and bias spring are disposed over the retractable sleeve with the spring disposed between the base and the sliding collar to bias the sliding collar towards the outer end and the slats have front and rear projections extending therefrom to prevent the sliding collar from sliding off the outer end and to releasably latch the sliding collar in a retracted position for use, the improvement for increasing the ease of manual retraction of the retractable sleeve comprising:
a gripping area extending radially outward from the outer end, said gripping area having a high friction surface whereby a user can reliably grip and pull the outer end longitudinally toward the base even when the outer end is covered with slippery fluid.

20. In a hypodermic needle disposed within a retractable sleeve, comprised of a plurality of longitudinal slats extending between a base carrying a bottom end of the hypodermic needle and an outer end slidably covering an injection end of the hypodermic needle, the improvement for increasing the reliability of operation comprising:
respective ones of the plurality of longitudinal slats having transverse areas forming living hinges at corresponding locations of intended bending.