Ambulance Cot Rail Arm Assembly for Single-Attendant 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's foot end, which can lead to injury, especially with heavy patients, and typically necessitates the assistance of a second attendant.
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 an attendant, utilizing a nested rail arrangement and variable speed control for efficient cot engagement and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual cot loading and unloading is performed by EMS personnel, then the cot can be loaded and unloaded, but the physical strain on personnel increases and risk of injury occurs
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 personnel to manually support the cot's weight during loading and unloading operations.
Solution Approach 2:
The patent replaces the manual mechanical system (personnel physically lifting and supporting the cot) with an automated mechanical system (motorized arm assembly with rail mechanism). This substitution eliminates the physical strain on personnel while maintaining the cot loading and unloading function.
2Object-affected harmful factors
If a second attendant is used to assist with cot loading and unloading, then the physical strain on each attendant is reduced, but the operational complexity and time required increases
Solution Approach 1:
The mechanical arm assembly is designed to autonomously perform the lifting and positioning tasks without requiring multiple personnel. The system self-regulates the mechanical assistance provided during cot loading and unloading, eliminating the need for coordinated multi-personnel operations while reducing physical strain on any single attendant.
3Area of stationary object
If the arm and rail mounting arrangement is designed for compact space, then the system occupies less space on the emergency vehicle deck, but the range of motion may be limited
Solution Approach 1:
The arm assembly and rail mechanism are designed with a nested configuration where components are arranged concentrically or in overlapping configurations. This nesting allows the system to achieve full range of motion while occupying minimal deck space, as the moving parts are contained within the footprint of the stationary components.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement to resolve the space versus range of motion conflict. The arm assembly moves in multiple dimensions (vertical, horizontal, and rotational) within a compact footprint, effectively using vertical space and angular movement to achieve full functionality without requiring large horizontal deck area.
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.