Hollow needle for medical use and a laser method for manufacturing
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United States of America Patent
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May 14, 1996
Issued Date -
N/A
app pub date -
Oct 31, 1994
filing date -
Sep 28, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The hollow needle (1) for medical use comprises a duct (10), which usually contains an aperture (11) which is elliptic or similar to an ellipse. The edge (14) of this aperture (11) is rounded by melting in the converging part (14') when regarded from the point (1') of the hollow needle (1). The process for rounding the edge (44) by melting uses a laser (45) which is pulsated or operates continuously, in the effective range (45') of which the part (44') to be rounded of the edge (44) lies.
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