Needle devices for medical use
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United States of America Patent
Stats
-
Mar 18, 1997
Grant Date -
N/A
app pub date -
Nov 6, 1995
filing date -
Nov 4, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A skin pricker has a barrel (1) housing a lancet (3) which is urged rearwardly by a spring (4 ). A plunger (2) can move the lancet (3) against the spring (4) to project the lancet's needle tip or tips (18) from the forward end of the barrel (1). The plunger (2) presses on the rear of the lancet (3) through a firing pin (16) integrally formed with the plunger and connected to it by a thin web (17). Increased pressure after needle tip projection shears the web and the lancet (3) is free to be returned by the spring (4), withdrawing the needle tip or tips.
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