Ring Cutter Guard Feedback Control for Safe Ring Transection
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Solution Overview
Problem
Existing methods for removing stuck rings from swollen digits, such as the ring cutter method and the string method, can be time-consuming and risky, potentially causing injury or discomfort to the patient.
Innovation Solution
A ring cutter device equipped with a blade motor, a circular blade, a guard, and a guard actuator, controlled by processors that adjust the blade motor speed based on temperature readings and control the guard's movement based on electrical current readings from the blade motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a ring cutter device is used to transect a stuck ring, then the removal time is reduced and efficiency is improved, but the risk of overheating and injury to the patient increases
Solution Approach 1:
The patent implements feedback control by monitoring the operating parameters of the ring cutter device and adjusting them in real-time. Sensors detect temperature, current, and cutting progress, and the system automatically adjusts blade speed and guard position to maintain safe operating conditions while ensuring complete ring transection
Solution Approach 2:
The guard acts as an intermediary element between the cutting blade and the patient's digit. It provides physical protection and thermal isolation, allowing the blade to operate at high speeds for efficient cutting while preventing direct contact between the heat-generating blade and the sensitive tissue
2Speed
If the blade motor speed is increased to improve cutting speed, then productivity is improved, but the temperature of the guard increases causing potential injury
Solution Approach 1:
The system dynamically adjusts the blade motor speed based on real-time temperature feedback. The processor monitors guard temperature and automatically modulates the motor speed to maintain optimal cutting performance while preventing excessive heat generation that could injure the patient
Solution Approach 2:
The patent changes the operating parameters of the blade motor based on temperature conditions. When the guard temperature approaches unsafe levels, the system reduces motor speed and blade rotation rate, thereby reducing heat generation while still achieving ring transection
3Manufacturing precision
If the guard is positioned closer to the blade to improve cutting precision, then manufacturing precision is improved, but the risk of injury to the patient increases
Solution Approach 1:
The system uses feedback control to monitor the position of the guard relative to the blade and adjusts it dynamically during the cutting process. Sensors detect the proximity and alignment, and the processor automatically positions the guard to maintain precise cutting while ensuring safe distance from the digit
Solution Approach 2:
The guard serves as a protective intermediary that can be precisely positioned close to the blade for accurate cutting. It provides a physical barrier between the blade and the patient's skin, allowing high-precision cutting operations without direct exposure of the tissue to the blade
4Reliability
If manual ring removal methods are used, then the risk of injury is reduced, but the removal time increases significantly
Solution Approach 1:
The ring cutter device is designed to perform the cutting operation autonomously with minimal human intervention. The system self-regulates its operating parameters, monitors its own temperature and cutting progress, and completes the transection automatically, combining the speed of automated cutting with the safety of controlled operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The ring cutter device safely and efficiently transects stuck rings by controlling the cutting process to prevent overheating and ensure precise cutting, thereby reducing the risk of injury to the patient.
Implementation Method 1
a blade motor housed in the body; a circular blade drivingly connected to the blade motor
Implementation Method 2
a current sensor positioned to sense electrical current associated with the blade motor
Implementation Method 3
a position sensor located to sense a position associated with the guard
Implementation Method 4
a temperature sensor positioned to sense a temperature associate with the guard
Implementation Method 5
a circular blade drivingly connected to the blade motor, the blade having a blade rotation axis and a peripheral cutting edge
Data Source
AI summary
A handheld ring cutter is disclosed. The ring cutter has a cutting progress indicator associated with a rotational position of a safety guard about a guard rotation axis, a guard position sensor located to sense the rotational position, and one or more processors communicatively coupled to the guard position sensor and the cutting progress indicator. The processors are configured to collectively direct the safety guard actuator to move the safety guard relative to the circular blade, periodically or continuously receive position signals from the guard position sensor, and periodically or continuously direct the cutting progress indicator to update based on the position signals.