07905857 is referenced by 29 patents and cites 648 patents.

A needle assembly is able to collect a sample of biological material in a needle of the assembly. The needle assembly has a safety shield capable of being moved on the needle assembly to cover a sharp tip of the needle assembly. The shield can be locked in place over the sharp tip by a locking mechanism. The assembly further includes an obturator that can be inserted into the needle to remove the sample from the needle. A reset member associated with the obturator is capable of engaging the locking mechanism to release the locking mechanism and allow the shield to be moved away from the sharp tip.

Title
Needle assembly including obturator with safety reset
Application Number
11/179438
Publication Number
7905857 (B2)
Application Date
July 11, 2005
Publication Date
March 15, 2011
Inventor
David Rork Swisher
St. Charles
MO, US
Agent
Lisa E Winsor Esq
Assignee
Covidien
CH
IPC
A61M 5/32
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