Systems and components for regulating fluid infusion to a patient
Inventors
Patton, Douglas • Rinehart, Joseph • McKeown, Morgan
Assignees
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Publication Number
US-12397105-B2
Publication Date
2025-08-26
Expiration Date
Abstract
Various fluid delivery systems are described comprising an infusion pump having a housing with a first opening and a hollow interior portion that is configured to receive a cartridge having a tubing. A pump unit can be disposed within the housing. The pump unit comprises a motor mechanically coupled with a crank shaft or eccentric cam that is configured to move a set of pistons or other objects to thereby compress one or more portions of the tubing over time as the crank shaft or eccentric cam rotates.
Core Innovation
The document describes an intravenous fluid infusion system that includes an infusion pump housing configured to receive a medication cartridge. The cartridge includes tubing that extends through the cartridge and along a defined path while medication flows from a medication source to a patient, and the pump unit within the housing sequentially compresses portions of the tubing over time to regulate fluid flow rate using a motor-driven mechanical actuation mechanism.
In one mechanical arrangement, a motor is mechanically coupled with a crank shaft having a set of sheaves, and the pump unit includes a set of pistons and a set of tie rods. Each piston is coupled to the crank shaft by one of the tie rods so the tie rod can move relative to the piston, and each tie rod is connected to one of the sheaves so the tie rod can move relative to the sheave. The pistons move over time as the crank shaft rotates, and when the cartridge is disposed within the pump housing, at least a portion of the tubing extending along a cartridge side portion is compressed by one or more of the pistons over time as the crank shaft rotates.
The document also describes a cartridge construction and valve arrangement that compresses tubing and prevents fluid flow when the valve is in a first position and allows fluid flow when the valve is moved to a second position by an actuator. The valve is biased in the first position, and the cartridge housing is configured to retain the tubing, including tubing extending through multiple portions of the cartridge housing along a C-shape. Additional cartridge configurations are described, including translucent cartridge housing and a cartridge tubing path formed along top, side, and bottom portions with tubing extending outside the cartridge along at least one of those portions.
Claims Coverage
The partial content provides three independent claims. Across these claims, the inventive features focus on a motor-crank-shaft-and-sheaves piston mechanism for sequential tubing compression, a medication cartridge with a defined C-shaped tubing path and biased valve actuation, and an integrated infusion system combining the cartridge with the pump housing so tubing is compressed over time as the crank shaft rotates.
Crank shaft with sheaves coupled to pistons by movable tie rods
A pump unit disposed within the housing comprising a motor mechanically coupled with a crank shaft having a set of sheaves disposed on or connected to the crank shaft, with pistons and tie rods where each piston is coupled to the crank shaft by one of the tie rods so the tie rod can move relative to the piston, and each tie rod is connected to one of the sheaves so the tie rod can move relative to the sheave, wherein the pistons are configured to move over time as the crank shaft rotates.
C-shape tubing cartridge with biased valve and actuator
A cartridge housing retaining a portion of tubing along a C-shape through top, side, and bottom portions with tubing extending outside the cartridge along at least one of the top, side, and bottom portions, together with a valve configured to compress the tubing and prevent fluid flow in a first position, an actuator mechanically coupled to the valve such that force applied to the actuator moves the valve to a second position allowing fluid to flow, wherein the valve is biased in the first position.
Integrated infusion system compressing side-portion tubing as crank shaft rotates
A cartridge with tubing along a cartridge side portion and a pump having a housing with a first opening and hollow interior portion configured to receive the cartridge, where a pump unit within the pump housing includes a motor mechanically coupled with a crank shaft having a set of sheaves, with pistons and tie rods such that each piston is coupled to the crank shaft by one tie rod and each tie rod is coupled to one sheave allowing movement relative to both piston and sheave, and wherein when the cartridge is disposed within the hollow interior portion, at least a portion of the tubing extending along the side portion is compressed by one or more of the pistons over time as the crank shaft rotates.
The claim coverage centers on three linked but distinct concepts: a pump unit where a crank shaft with sheaves drives pistons through tie rods that move relative to both pistons and sheaves, a cartridge that routes tubing through a defined C-shape while using a biased valve moved by an actuator to compress tubing and control flow, and an integrated infusion system where the cartridge is received by a pump housing and the cartridge tubing along the side portion is compressed over time as the crank shaft rotates.
Stated Advantages
Documented Applications
No documented applications found
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