04676783 is referenced by 149 patents and cites 7 patents.

An intravenous needle with a sharpened distal end has a proximal end fixed within a first enlarged end of an inner tube. The enlarged end of the inner tube is held tightly within a first end of an outer tube by friction. The needle passes through a constricted opening in the first end of the outer tube. The second end of the inner tube passes through a constricted opening in the second end of the outer tube. The needle is used by gripping soft plastic wings on the outer tube and removing a needle cover from a nipple on the first end of the outer tube. The needle is then inserted in the desired location and the outer tube and a protruding end of the inner tube are taped in place. Fluids are permitted to flow through the inner tube and needle. When use is complete, the needle is removed from the vein, the protruding end of the inner tube is pulled outward, pulling the first end of the inner tube and the needle into the outer tube. The first end of the inner tube tightly wedges within the second end of the outer tube, holding the needle totally within the outer tube. Finally, the retracted used needle assembly is discarded, encased in the outer tube.

Title
Retractable safety needle
Application Number
6/771640
Publication Number
4676783
Application Date
September 3, 1985
Publication Date
June 30, 1987
Inventor
Patrice G Guyenet
Charlottesville
VA, US
Richard D Pearson
Charlottesville
VA, US
Janine C Jagger
Charlottesville
VA, US
Agent
James C Wray
Assignee
The University of Virginia Alumni Patents Foundation
VA, US
IPC
A61M 5/00
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