Liquid level sensing apparatus and related methods
AssigneeAbbott Laboratories
InventorsLyle Yarnell, Michael Shawn Murphy
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Abstract
Liquid level sensing apparatus are disclosed. An example liquid level sensing apparatus includes a cannula defining a body having a tip and an access channel. The tip to pierce a container, where the cannula is to be at least partially positioned in the container when the tip pierces the container. A probe is to be positioned in the access channel. A signal source is to electrically energize the probe and the cannula to cause the probe to emit a first signal and cause the cannula to emit a second signal.
Claims33
A liquid level sensing apparatus comprising:
- a cannula defining a body having a tip and an access channel, the tip to pierce a container, the cannula to be at least partially positioned in the container when the tip pierces the container;
- a probe to be positioned in the access channel;
- and
- a signal source to electrically energize the probe and the cannula to cause the probe to emit a first signal and cause the cannula to emit a second signal.
A liquid level sensing apparatus comprising:
- a cannula composed of a conductive material, the cannula to pierce a seal of a container, the cannula being movable relative to the container in a first direction and a second direction, the first direction being different than the second direction, the cannula including an opening passing through a first end of the cannula and a second end of the cannula to define a passageway, the cannula to emit a first signal when at least a portion of the cannula is positioned in a cavity of the container;
- a probe composed of a conductive material, the probe being movable relative to the cannula in the first direction and the second direction, the probe to emit a second signal, the probe to pass through the passageway provided by the cannula to aspirate a sample from the container;
- and
- a signal generator operatively coupled to the cannula and the probe, the signal generator to provide the first signal to the cannula and the second signal to the probe.
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Dependencies are inferred from the claim text.