Silent pumping mechanism for infusion pump

ChangeBridge: Patent Grants - Medical Devices (A61M)

Published April 7th, 2026

Detected April 7th, 2026

Summary

USPTO granted patent US12594375B2 to CareFusion 303, Inc. covering a silent pumping mechanism for peristaltic infusion pumps with stabilizing protrusions to prevent finger vibration during fluid delivery. The patent includes 16 claims relating to coordinated pumping finger movement against flexible tubing for patient fluid delivery. The grant provides CareFusion exclusive rights to this medical device technology in the United States.

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What changed

USPTO granted patent US12594375B2 to CareFusion 303, Inc. for a silent pumping mechanism in peristaltic infusion pumps. The invention features stabilizing protrusions on pumping fingers that contact chassis sidewalls to prevent vibration during coordinated peristaltic action against flexible tubing for patient fluid delivery. The patent contains 16 claims and is classified under A61M and F04B CPC codes.

Competitors developing peristaltic infusion pump technology should conduct freedom-to-operate analyses to assess whether their products may infringe CareFusion's patent claims. Healthcare technology companies and medical device manufacturers should review the patent specification when designing similar silent pumping mechanisms to avoid potential intellectual property conflicts.

What to do next

Record patent grant date for freedom-to-operate analysis
Review patent claims for potential infringement concerns in related product development

Source document (simplified)

← USPTO Patent Grants

Silent pumping mechanism for infusion pump

Grant US12594375B2 Kind: B2 Apr 07, 2026

Assignee

CareFusion 303, Inc.

Inventors

Carsten Steins

Abstract

Features relating to a pumping mechanism of a peristaltic infusion pump are provided. Stabilizing protrusions are provided for one or more pumping fingers of the pumping mechanism, where the one or more pumping fingers move in a coordinated and synchronized fashion with respect to one another to provide a controlled peristaltic action against a flexible tube for delivery of a fluid to a patient. The protrusions extend outward from one or more side regions of the pumping fingers to create points of contact on a side-wall of a recess in a chassis in which the pumping mechanism is positioned. The points of contact serve to stabilize the fingers to prevent vibration and/or movement of the fingers against the sidewall.