Post-injection needle sheath
First Claim
1. A post-injection needle sheath for enclosing the sharpened end of a needle as used with a syringe, the needle in the originally presented condition having a sheath portion in a compact condition, with a substantial portion of the needle exposed for insertion into a patient, this sheath after needle use and withdrawal of the needle from the patient manipulated so that said sheath is advanced and a cap portion is moved to enclose the sharpened end of the needle, this post-injection needle sheath includingan injection needle including a securing hub, a shank and a sharpened distal end, this hub adapted for removably mounting on a closed end portion of a syringe;
- a cap portion having a forward end wall provided with a formed through aperture sized to slide on and along the shank of said needle and means for removably mounting a needle shield thereon to provide protection of an exposed portion of said needle prior to insertion and other use;
a compression member adapted to be compressed so as to provide a force to urge said cap portion forwardly;
means for limiting the forward movement of the cap portion as and when the sharpened end of the needle is within the cap portion so as to enclose said sharpened end to prevent accidental pricking; and
means for retaining said sheath in the needle-exposed condition until the attendant withdraws the needle from the patient and desired to enclose the sharpened end of the needle.
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Accused Products
Abstract
A post-injection needle sheath for enclosing the sharpened end of a needle used with a syringe is shown with and without spring actuation. This sheath is initially in a compact and secured condition on the needle hub and has a substantial portion of the needle exposed for insertion into a patient or vial. Two embodiments employ a compression spring. Three embodiments avoid a spring per se, but have a corrugated portion and a flange portion that are manipulated by the attendant to urge the sheath forward to enclose the sharpened end of the needle. In all embodiments, the forward end includes a transverse wall in which is formed an aperture that is slightly larger than the shank of the needle. Protection to the exposed needle before use is provided by a conventionally removable shield which is removed at time of use. After withdrawal of the needle from the patient, the sheath, with the cap or end portion, is moved forward to enclose the sharpened needle.
188 Citations
17 Claims
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1. A post-injection needle sheath for enclosing the sharpened end of a needle as used with a syringe, the needle in the originally presented condition having a sheath portion in a compact condition, with a substantial portion of the needle exposed for insertion into a patient, this sheath after needle use and withdrawal of the needle from the patient manipulated so that said sheath is advanced and a cap portion is moved to enclose the sharpened end of the needle, this post-injection needle sheath including
an injection needle including a securing hub, a shank and a sharpened distal end, this hub adapted for removably mounting on a closed end portion of a syringe; -
a cap portion having a forward end wall provided with a formed through aperture sized to slide on and along the shank of said needle and means for removably mounting a needle shield thereon to provide protection of an exposed portion of said needle prior to insertion and other use; a compression member adapted to be compressed so as to provide a force to urge said cap portion forwardly; means for limiting the forward movement of the cap portion as and when the sharpened end of the needle is within the cap portion so as to enclose said sharpened end to prevent accidental pricking; and means for retaining said sheath in the needle-exposed condition until the attendant withdraws the needle from the patient and desired to enclose the sharpened end of the needle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In combination,
a hub; -
a needle secured to and extending from said hub; a cap member removably mounted on said hub and having a passageway slidably receiving said needle; and a compression spring secured to and between said hub and said cap member for movement between a compressed condition with said cap member secured to said hub and an extended condition with said cap member removed from said hub and extended about and over a distal end of said needle, said distal end being misaligned with said passageway in said extended position of said spring. - View Dependent Claims (14, 15, 16, 17)
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Specification