Peristaltic Pump Self-Closing Occlusion Bed Linkage
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Solution Overview
Problem
Existing peristaltic pump systems face challenges in providing a simple and reliable method for inserting and removing tubing, ensuring precise positioning and retention within the occlusion pathway, especially in medical device applications where accurate tubing placement is critical for successful operations.
Innovation Solution
The integration of a linkage mechanism that coordinates the movement of the occlusion bed with the pivoting or sliding door, utilizing cam surfaces and rollers or bar linkage systems, to facilitate easy insertion and removal of tubing while ensuring secure positioning during operation, along with latching mechanisms and sensing devices for safety and operation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pivoting door is used to provide access to the occlusion pathway, then ease of tubing insertion and removal is improved, but reliability of tubing retention during operation deteriorates
Solution Approach 1:
The door mechanism is merged with the occlusion bed through a linkage system that couples the door's pivoting motion to the occlusion bed's linear movement. This integration ensures that when the door closes, it simultaneously drives the occlusion bed to engage the tubing, combining two functions into one coordinated action that maintains reliability during operation.
Solution Approach 2:
A linkage mechanism acts as an intermediary between the door and the occlusion bed. This intermediary component translates the rotational motion of the door into linear motion of the occlusion bed, ensuring reliable coordination between the door's closing action and the tubing engagement without direct mechanical contact between the door and occlusion bed.
2Ease of operation
If the occlusion bed is made movable to facilitate tubing insertion, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The occlusion bed's movable feature is merged with the door mechanism rather than being a separate independent system. The linkage mechanism combines the door's pivoting motion with the occlusion bed's linear movement, reducing overall device complexity by integrating multiple functions into a coordinated system rather than adding separate mechanisms.
3Reliability
If precise positioning of tubing is ensured during operation, then reliability is improved, but ease of tubing removal deteriorates
Solution Approach 1:
The system dynamically transitions between two states: during operation, the occlusion bed is positioned to precisely engage and hold the tubing; during removal, the door pivots to drive the occlusion bed away from the tubing. This dynamic repositioning of the occlusion bed allows the system to maintain reliability during operation while facilitating easy removal when needed.
Data Source
AI summary
Peristaltic pump assemblies in which the closing and opening of a pivoting or sliding door is coordinated with movement of the occlusion bed toward and away from the rotor assembly to engage and disengage tubing within the occlusion pathway are disclosed. Linkage mechanisms provided by the interaction of cam surfaces with rollers, as well as bar linkage mechanisms, are disclosed. The linkage mechanism, in addition to providing precise displacement of the occlusion bed, may also provide an over-center feature that enhances safety and pump operation when the door is in a closed position. Latching mechanisms and sensors may be incorporated. Adaptive components such as tubing cassettes routing aspiration and/or infusion tubing in a predetermined configuration to mate with occlusion pathways in aspiration and/or infusion pump assemblies provided in various types of medical devices and control consoles are also provided.