Air detection method for pumps with volume measurement
AssigneeCareFusion 303, Inc.
InventorFrank Cai
Life of this patent
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Abstract
Methods of air detection in pumps are described herein. In certain embodiments, a pump for detecting air includes a plunger, a plunger air detection module, a camshaft, and a first biasing member. The plunger is movable to selectively engage a tubing segment with a fluid. The plunger air detection module is disposed within the plunger. The camshaft is configured to move the plunger between an engaged position in contact with the tubing segment and a disengaged position spaced apart from the tubing segment. The first biasing member is configured to urge the plunger toward the tubing segment to maintain contact with the tubing segment in the engaged position.
Claims20
A pump for detecting air comprising:
- a plunger movable to selectively engage a tubing segment comprising a fluid;
- a backer configured to support the tubing segment when the plunger engages the tubing segment;
- a plunger air detection module extending within the plunger and configured to transmit a signal;
- a backer air detection module within the backer and configured to receive the signal from the plunger air detection module;
- a camshaft configured to move the plunger between an engaged position in contact with the tubing segment and a disengaged position spaced apart from the tubing segment;
- and
- a first biasing member configured to urge the plunger toward the tubing segment to maintain contact with the tubing segment in the engaged position, wherein the plunger is urged toward the tubing segment and the backer.
A method comprising:
- providing a tubing segment within a pump, the tubing segment comprising a fluid traveling therethrough;
- urging a plunger toward the tubing segment and a backer such that the plunger is configured to maintain contact with the tubing segment as the fluid travels therethrough, and the backer is configured to support the tubing segment;
- and
- emitting a signal from a plunger air detection module extending within the plunger through the tubing segment, and receiving the signal by a backer air detection module of the backer.
Dependencies are inferred from the claim text.