Peritoneal Dialysis Hose Mount Pivoting Under Excessive Torque
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Solution Overview
Problem
Peritoneal dialysis machines are prone to damage due to excessive forces or torques applied during the connection of hose sets, particularly when the mount is long and made of plastic, which can lead to housing damage.
Innovation Solution
Incorporating a pivot axle mechanism that allows the mount to pivot from a first position to a second position when specific forces or torques are exceeded, reducing the stress on the machine housing and preventing damage, with optional secondary pivot axles and holder mechanisms to control the pivoting action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the mount is arranged at a long lever on the machine housing, then the mount can be positioned further away from the machine body improving accessibility, but large torques arise that can damage the plastic housing
Solution Approach 1:
The mount is made pivotable about a first pivot axle, transforming it from a static fixed structure to a dynamic movable one. This allows the mount to rotate away from its operational position when excessive forces are applied, preventing damage to the housing while maintaining accessibility during normal use.
2Reliability
If the mount is made fixed and rigid, then it can withstand forces during connection, but it transmits excessive forces to the housing causing damage
Solution Approach 1:
The mount transitions from a rigid fixed structure to a dynamic pivotable structure. During normal connection operations, the mount remains stable and reliable. When excessive forces are applied, the pivotable connection allows the mount to rotate away, breaking the force transmission path to the housing.
Solution Approach 2:
The first pivot axle acts as an intermediary element between the mount and the housing. It allows the mount to be securely connected during normal operation while providing a mechanical release mechanism when forces exceed safe limits, protecting the housing from damage.
3Strength
If the mount is made pivotable to avoid force transmission, then housing damage is prevented, but the mount may unintentionally pivot during normal operation
Solution Approach 1:
The holder means act as intermediary elements that mediate between the mount and the pivot axle. They provide a controlled connection that allows pivoting only when forces exceed a specific threshold, preventing unintentional pivoting during normal operation while still protecting the housing from excessive forces.
Solution Approach 2:
The holder means are designed with specific mechanical properties (such as friction characteristics or geometric constraints) that change the effective connection parameters. The mount remains firmly held during normal use but can pivot when forces exceed the designed threshold, achieving both stability and protection.
Data Source
AI summary
A peritoneal dialysis machine has at least one mount for fixing one or more sections of a hose set for conducting a dialysis solution from and/or to a patient. A first pivot axle is provided about which the mount can be pivoted from a first position into a second position.