Pipes and tubular conduits – Combined – With indicating means
Reexamination Certificate
2005-02-08
2005-02-08
Noland, Thomas P. (Department: 2856)
Pipes and tubular conduits
Combined
With indicating means
C137S557000, C138S177000, C073S864730, C073S864250, C324S647000
Reexamination Certificate
active
06851453
ABSTRACT:
A sensor for detecting contact of a fluid delivery probe with a fluid surface and for detecting fluid flow through the probe includes a first electrode disposed along a fluid flow path of the probe upstream from a distal tip of the probe and a second electrode longitudinally spaced and electrically isolated from the first electrode and disposed at the distal tip of the probe. An oscillating signal is transmitted through the first electrode, and at least a portion of the signal is received through the second electrode. Through changes in the received signal due to the distal tip of the probe coming into contact with a fluid surface or due to fluid flow through the conduit between the first and second electrodes, fluid surface contact and fluid flow can be detected. A pressure sensor can be employed to monitor internal fluid pressure within the fluid conduit of the fluid delivery probe as a secondary, redundant mechanism for detecting fluid flow through the conduit.
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Jurik Anna
Katz Bernard
Keating Michael J.
Klengler Stone
Kotlarik John J.
Cappellari, Esq Charles B.
Gen-Probe Incorporated
Noland Thomas P.
Rothwell Figg Ernst & Manbeck P.C.
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