Ambulance Cot Rail Arm Support for Low-Strain Loading
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Solution Overview
Problem
The process of loading and unloading a cot into and out of an ambulance is strenuous for emergency medical service personnel, often requiring them to support the cot with significant physical effort, which can lead to injury, especially when dealing with heavy patients.
Innovation Solution
An ambulance cot and loading and unloading system featuring a base-mounted rail and arm assembly with a drive mechanism that provides cantilevered support, allowing the cot to be easily loaded and unloaded with reduced manual effort by using a cot-based controller and user input device, and incorporating a latch mechanism for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual loading and unloading of cot is performed by EMS personnel, then the cot can be loaded and unloaded, but the physical strain on EMS personnel increases significantly
Solution Approach 1:
A mechanical arm assembly acts as an intermediary device between the cot and the ambulance interior. The arm engages with the cot and provides automated lifting and positioning assistance, reducing the need for EMS personnel to manually support the cot's weight during loading and unloading operations.
Solution Approach 2:
The patent replaces the manual mechanical system (EMS personnel physically lifting and pushing the cot) with an automated mechanical system (motorized arm assembly with rail mechanism). This substitution eliminates the need for human physical effort in the most strenuous parts of the loading and unloading process.
2Ease of operation
If a mechanical loading and unloading system is added to the ambulance, then the physical strain on EMS personnel is reduced, but the device complexity increases
Solution Approach 1:
The arm assembly is designed to perform multiple functions: it can lift the cot, position it at the correct angle, hold it in place during loading, and assist during unloading. This multi-functionality reduces the need for separate specialized devices for each step of the process.
Solution Approach 2:
The mechanical system is designed with nested components where the arm assembly can be retracted into a compact configuration when not in use. The rail mechanism allows the arm to extend and retract along the ambulance's longitudinal axis, minimizing space requirements within the ambulance interior.
3Adaptability or versatility
If the arm is extended outside the cargo area for greater range of motion, then the loading capability is improved, but the space occupied on the emergency vehicle deck increases
Solution Approach 1:
Instead of extending the arm horizontally outward from the ambulance, the system utilizes the longitudinal dimension by allowing the arm to travel along a rail that extends toward the rear of the ambulance. This dimensional approach allows the arm to reach the cot at the rear doors while keeping the mounting structure within the ambulance's footprint.
Solution Approach 2:
The rail and arm assembly is designed to be dynamically extendable and retractable. When the arm is not in use, it retracts into a compact position within the cargo area. When needed, it extends along the rail to provide the necessary range of motion for engaging and maneuvering the cot during loading and unloading operations.
Data Source
AI summary
An ambulance cot loading and unloading system for an emergency vehicle includes a base for mounting in the emergency vehicle and an arm mounted for linear movement along the base, wherein the arm configured to support a cot while the cot is being loaded into or unloaded from the emergency vehicle. The ambulance cot loading and unloading system further includes an indicator mounted relative to the arm and a control system, which is in communication with the indicator and configured to generate a status indication of the cot loading and unloading system at the indicator.