Method of producing a probe for aspirating and dispensing probe

Details Method of producing a probe for aspirating and dispensing probe Method of producing a probe for aspirating and dispensing probe

1997-01-29

1998-12-01

Pyon, Harold Y.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

422 63, 422 67, 422 99, 7386332, 7386401, 7386414, 7386421, 436180, B01L 302

Patent

active

058433783

ABSTRACT:
A method of producing a probe for aspirating and dispensing liquid. A fluid conduit and rod are positioned in the central bore of a tube so that an inlet end of the conduit and a contact end of the rod protrude from an upper end of the tube and a discharge end of the conduit and a sensing end of the rod protrude from a lower end of the tube. The tube has a heat-shrinkable outer layer and a meltable inner layer. The tube is heated so that its outer layer shrinks and its inner layer melts to encapsulate middle portions of the conduit and rod. A circuit board having first and second traces and first and second holes is placed on the upper end of the tube so that the inlet end of the conduit is inserted through the first hole and the contact end of the rod is inserted through the second hole. The conduit and rod are attached to the board so that the conduit is electrically connected to the first trace and the rod is electrically connected to the second trace. First and second conducting pins are also attached to the board. The conducting pins electrically connect the traces to a voltage sensing circuit when the probe is attached to a probe positioning device.

REFERENCES:
patent: 3754444 (1973-08-01), Ure et al.
patent: 4451433 (1984-05-01), Yamashita et al.
patent: 4647432 (1987-03-01), Wakatake
patent: 5004582 (1991-04-01), Miyata et al.
patent: 5045286 (1991-09-01), Kitajima et al.
patent: 5178835 (1993-01-01), Uekusa et al.

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