Dispensing fluid from an infusion pump system
First Claim
Patent Images
1. An infusion pump system for the delivery of medication, comprising:
- a pump housing defining a space to receive a medicine for dispensation; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including rod segments, each rod segment being interconnected to the next rod segment by a hinge portion so that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, the pushrod including an anti-rotation mechanism to oppose rotation of the pushrod about a longitudinal axis of the pushrod, and the pushrod including an anti-torsion mechanism to oppose torsion of one rod segment relative to another rod segment.
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Accused Products
Abstract
Some embodiments of a medical infusion pump system include a pump device having a flexible pushrod that can adjust from a curved configuration to a generally straight configuration. The flexible pushrod is part of a drive system of the pump device so that the flexible pushrod can be controllably and incrementally advanced toward a medicine reservoir to incrementally dispense the medicine therein. In particular embodiments, the flexible pushrod may comprise an anti-rotation mechanism, an anti-torsion mechanism, or a combination thereof.
437 Citations
52 Claims
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1. An infusion pump system for the delivery of medication, comprising:
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a pump housing defining a space to receive a medicine for dispensation; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including rod segments, each rod segment being interconnected to the next rod segment by a hinge portion so that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, the pushrod including an anti-rotation mechanism to oppose rotation of the pushrod about a longitudinal axis of the pushrod, and the pushrod including an anti-torsion mechanism to oppose torsion of one rod segment relative to another rod segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An infusion pump system for the delivery of medication, comprising:
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a pump housing defining a space to receive a medicine for dispensation; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including rod segments that are hingedly engaged to one another such that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, the pushrod including an anti-rotation mechanism to hinder rotation of the pushrod about a longitudinal axis of the pushrod, the anti-rotation mechanism including two or more longitudinal channels extending through at least a plurality of the rod segments. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An infusion pump system for the delivery of medication, comprising:
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a pump housing defining a space to receive a medicine for dispensation; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including rod segments that are hingedly engaged to one another such that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, the pushrod including an anti-torsion mechanism to oppose torsion of one rod segment relative to an adjacent rod segment, the anti-torsion mechanism including an extended member protruding from the one rod segment that is engageable with a cavity disposed in the adjacent rod segment. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. An infusion pump system for the delivery of medication, comprising:
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a pump housing defining a space to receive a medicine for dispensation; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including rod segments that are hingedly engaged to one another such that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, the pushrod including an anti-elongation mechanism disposed on at least a plurality of the pushrod segments to maintain the leading face of one pushrod segment in abutting relationship with a trailing face of an adjacent pushrod segment when a portion of the pushrod is adjusted to the generally noncurved shape. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An infusion pump system for the delivery of medication, including:
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a pump housing defining a space to receive a medication; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including rod segments, each rod segment being interconnected to the next rod segment by a hinge portion so that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape, wherein each of the hinge portions comprises a flexible wire that extends from a leading face of one rod segment to a trailing face of an adjacent rod segment. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45)
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46. An infusion pump system for the delivery of medication, comprising:
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a pump housing defining a space to receive a medication cartridge; and
a drive system to dispense medicine when the medicine is received by the pump housing, the drive system including a pushrod that is movable to apply a dispensing force to dispense medicine, the pushrod including mechanically assembled rod segments, each rod segment including a hinge protrusion that pivotably engages a hinge receiver cavity of the next rod segment in the row by a hinge assembly so that at least a portion of the pushrod is adjustable from a curved shape to a generally noncurved shape. - View Dependent Claims (47, 48, 49, 50, 51, 52)
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Specification