Needle sheath
First Claim
1. A hypodermic syringe having a barrel, a hollow fluid dispensing needle which projects from the barrel, a needle retractor operable to retract the needle after use from the projecting position to an inaccessible and inoperative position, and a sheath which is removably engageable with the syringe to sheath the needle and provide an interior zone for communication with the internal bore of the needle, the sheath being apertured to admit liquid to said zone whereby liquid drawn through the needle into the syringe first passes into said zone.
2 Assignments
0 Petitions
Accused Products
Abstract
A sheath for sheathing the needle of a hypodermic syringe and penetrating the rubber cap of a vial or the like, the sheath having apertures therein to allow the ingress of liquid into a zone thereof with which the needle communicates so that the liquid drawn through the needle during filling of the syringe first enters that zone before entering the needle. The sheath is further provided with a filter element and/or a needle-wiping element.
-
Citations
38 Claims
- 1. A hypodermic syringe having a barrel, a hollow fluid dispensing needle which projects from the barrel, a needle retractor operable to retract the needle after use from the projecting position to an inaccessible and inoperative position, and a sheath which is removably engageable with the syringe to sheath the needle and provide an interior zone for communication with the internal bore of the needle, the sheath being apertured to admit liquid to said zone whereby liquid drawn through the needle into the syringe first passes into said zone.
- 7. A sheath which sealably connects over the needle of a hypodermic syringe and is adapted for penetrating the rubber cap of a vial or the like, the sheath being apertured to allow the ingress of liquid to an interior zone thereof whereby liquid drawn through the needle into the syringe first passes into said zone, at least one filter element being incorporated in the sheath to exclude the entry of particulate material into said zone.
- 14. A sheath which sealably connects over the needle of a hypodermic syringe and is adapted for penetrating the rubber cap of a vial or the like, the sheath being apertured to allow the ingress of liquid to an interior zone thereof whereby liquid drawn through the needle into the syringe first passes into said zone, at least one needle-wiping element being incorporated in the sheath and arranged so that removal of the sheath automatically wipes the needle to remove any excess liquid on the outside thereof.
- 36. A sheath which sealably connects over the needle of a hypodermic syringe and is adapted for penetrating the rubber cap of a vial or the like, the sheath being apertured to allow the ingress of liquid to an interior zone thereof whereby liquid drawn through the needle into the syringe first passes into said zone, the sheath including a one-way valve operable to allow fluid flow into said zone.
Specification