PEN INJECTOR HAVING A NEEDLE SHIELD
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United States of America Patent
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-
N/A
Issued Date -
Oct 9, 2008
app pub date -
Apr 3, 2008
filing date -
Apr 5, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A pen injector includes a vial cartridge and a generally tubular body that surrounds the vial cartridge. A needle shield assembly is removably mounted to a mounting end of the body and includes a hollow needle that has a tip for injecting into a patient. A needle hub at least partially surrounds the hollow needle and a slideable sleeve is slideably mounted on the needle hub. The needle hub has an outer surface which deflects the slideable sleeve as the slideable sleeve slides toward a receiving end of the needle hub and into a retracted position. The slideable sleeve bears resiliently on the outer surface of the needle hub during sliding movement of the slideable sleeve relative to the needle hub toward the retracted position such that a restoring force is generated for urging the slideable sleeve to move toward an injection end of the needle hub and into an extended position in which the tip of the needle is located completely inside of the slideable sleeve.
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