04950251 is referenced by 43 patents and cites 3 patents.

A simplified retractable needle hypodermic syringe is provided which includes a barrel having a needle carrier mounted therein with a cannula attached thereto. A slidable plunger is mounted within the barrel which includes a shaft and hub for locking to the carrier. The plunger seal is conveniently mounted about the shaft between the plunger and the hub.

Title
Simplified retractable needle syringe
Application Number
322282
Publication Number
4950251
Application Date
December 12, 1989
Publication Date
August 21, 1990
Inventor
Michael L Haining
6731 Ashmore, Houston, 77069
TX, US
Agent
Richard L Moseley
IPC
A61M 5/32
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