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US 8,523,816 B2Granted
Automatic release of IV pump cassette
AssigneeCareFusion 303, Inc.
InventorGregg Kirkpatrick
Life of this patent
Estimating the term…
Abstract
An intravenous (IV) pump is disclosed. The IV pump includes a housing, a permanent magnet, an electromagnet, and a switch configured to selectably energize or de-energize the electromagnet. The permanent magnet generates a magnetic field and the electromagnet, when energized, generates a magnetic field that approximately cancels the magnetic field of the permanent magnet.
Claims21
An intravenous (IV) pump, comprising:
- a housing configured to accept a cassette that forms a portion of an IV set;
- and
- a mechanism for coupling the cassette to the housing, the mechanism comprising:
- a permanent magnet coupled to the housing, the permanent magnet generating a magnetic field;
- an electromagnet coupled to the housing, the electromagnet configured to generate, when energized, a magnetic field that approximately cancels the magnetic field of the permanent magnet;
- and
- a switch coupled to the electromagnet, the switch configured to selectably energize or de-energize the electromagnet.
4 more elements
An intravenous (IV) pump, comprising:
- a housing configured to accept a cassette that forms a portion of an IV set having an attached magnetic element;
- an electromagnet attached to the housing, the electromagnet configured to, when energized, generate a magnetic field of either a first polarity or a second polarity, wherein the second polarity is opposite the first polarity;
- and
- a switch attached to the housing and coupled to the electromagnet, the switch configured to energize the electromagnet to selectably generate a field of either the first polarity or the second polarity,
- wherein the electromagnet is configured to, when energized in the first polarity, attract the magnetic element and thereby attach and retain the IV set to the housing.
2 more elements
An intravenous (IV) pump, comprising:
- a housing configured to accept a cassette that forms a portion of an IV set having an attached magneto-sensitive element;
- a first permanent magnet fixedly attached to the housing, the first permanent magnet generating a first magnetic field;
- and
- a second permanent magnet movably attached to the housing, the second permanent magnet having a first position and a second position and generating a second magnetic field;
- wherein the second magnetic field augments the first magnetic field when the second permanent magnet is in the first position;
- and
- wherein the second magnetic field opposes the first magnetic field when the second permanent magnet is in the second position.
4 more elements
An intravenous (IV) system, comprising:
- an IV set comprising a cassette having an attached magneto-sensitive element;
- and
- an IV pump comprising:
- a housing configured to accept the cassette;
- and
- a mechanism for coupling the cassette to the housing, the mechanism comprising:
- a permanent magnet attached to the housing, the permanent magnet configured to attract the magneto-sensitive element of the cassette;
- an electromagnet attached to the housing, the electromagnet configured to generate a magnetic field when energized such that the magnetic field generated by the electromagnetic approximately cancels the magnetic field of the permanent magnet;
- and
- a switch coupled between a power source and the electromagnet, the switch configured to energize and de-energize the electromagnet.
7 more elements
An intravenous (IV) pump, comprising:
- a housing configured to accept a cassette that forms a portion of an IV set, the cassette comprising a magneto-sensitive material;
- and
- a mechanism for coupling the cassette to the housing, the mechanism comprising:
- a magnetic attractive feature coupled to the housing, the magnetic attractive feature configured to create a first magnetic field so as to attract the magneto-sensitive material;
- a magnetic cancellation feature coupled to the housing, the magnetic cancellation feature configured to create a second magnetic field that is at least substantially equal in magnitude and opposite in direction to the first magnetic field in a region surrounding the magneto-sensitive material so as to substantially cancel the attraction of the cassette by the magnetic attractive feature;
- and
- a control element operatively coupled to the magnetic cancellation feature, the control element configured to cause the magnetic cancellation feature to create the second magnetic field.
4 more elements
A method of releasing an intravenous (IV) set from an IV pump, the method comprising the steps of:
- coupling a cassette that forms a part of the IV set to a housing of the IV pump that is configured to accept the cassette using a magnetic attractive element that is coupled to the housing and configured to create a first magnetic field so as to attract a magneto-sensitive material that is part of the cassette;
- actuating a control element that is operable coupled to a magnetic cancellation feature that is coupled to the housing and configured to create a second magnetic field that is at least substantially equal in magnitude and opposite in direction to the first magnetic field in a region surrounding the magneto-sensitive material so as to substantially cancel the attraction of the cassette by the magnetic attractive feature;
- removing the cassette of the IV set from the housing of the IV pump when the first magnetic field is substantially cancelled.
Dependencies are inferred from the claim text.