Method of making a sample liquid aspiration and dispensing probe

Details Method of making a sample liquid aspiration and dispensing probe Method of making a sample liquid aspiration and dispensing probe

1997-02-27

1999-10-05

Echols, P. W.

Metal working

Method of mechanical manufacture

Assembling or joining

295221, 264230, B23P 1902

Patent

active

059605308

ABSTRACT:
The sample liquid aspirating and dispensing probe includes a tubular plastic inner member and a tubular metallic outer member. One or more sections of the plastic inner member are drawn-down in dies to provide a large diameter section, a small diameter section and an intermediate transition section. The plastic member is inserted in the metal member and annealed to conform the profile of the plastic member transition section with a streamlined transition section of the metal outer member. The dual member probe has an ultra-smooth interior surface, substantially free of eddy-forming imperfections. Thus there is minimal likelihood of turbulent eddies forming when rinse liquid is directed through the probe. The metallic member provides the probe with a conductive capability for capacitive liquid level sensing.

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patent: 5485667 (1996-01-01), Kleshinski
patent: 5487792 (1996-01-01), Fox

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