Ambulance Cot Rail and Brake Features to Prevent Hot Dropping
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Solution Overview
Problem
Ambulance cots lack effective control features to prevent rapid, uncontrolled dropping (hot dropping) and provide safe speed control and weight distribution during transport, leading to injuries for both patients and Emergency Medical Technicians (EMTs).
Innovation Solution
The ambulance cot system incorporates a notched ladder rail assembly to prevent hot dropping, a hand braking system for speed control, and team lift rails to distribute weight evenly among EMTs, ensuring safe handling and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a raising, lowering and height locking mechanism is used in conventional ambulance cots, then the cot can be adjusted to different heights, but the mechanism allows inadvertent, uncontrolled and rapid dropping of the patient litter (hot dropping)
Solution Approach 1:
The notched ladder rail assembly is pre-configured with notches at specific height positions. The ladder rail is preliminarily engaged with these notches to provide predetermined height settings, allowing the cot to be raised or lowered to specific safe positions before operation begins.
Solution Approach 2:
The notched ladder rail assembly acts as an intermediary mechanism between the height adjustment operation and the patient litter. The notches serve as intermediate engagement points that mediate the movement, preventing direct uncontrolled dropping by requiring the ladder rail to engage with specific notched positions during height adjustment.
2Ease of operation
If conventional cots lack speed control mechanisms, then the structure remains simple, but EMTs cannot control cot speed when descending sloped surfaces
Solution Approach 1:
The hand braking system is designed to be self-operating by the EMT through manual lever manipulation. The braking mechanism serves itself by converting the EMT's manual input directly into friction-based speed control without requiring additional power sources or complex automated systems.
3Ease of operation
If conventional cots lack team lift rails, then the structure remains simpler, but EMTs cannot safely distribute the weight of the cot and patient, leading to musculoskeletal injuries
Solution Approach 1:
The team lift rail system segments the weight-bearing function across multiple designated grab points distributed along the cot structure. Instead of a single lifting point, the rail is divided into multiple sections with notches and grab areas, allowing multiple EMTs to simultaneously bear portions of the total weight.
Solution Approach 2:
The team lift rails extend horizontally along the length of the cot, adding a longitudinal dimension to weight distribution. This transforms the vertical weight-bearing action into a distributed system where force is applied across multiple points along the rail's length, enabling balanced team lifting.
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 system effectively prevents accidental dropping, allows controlled speed management, and distributes weight safely, reducing the risk of musculoskeletal injuries and improving the safety of both patients and EMTs during transport.
Implementation Method 1
telescoping leg assembly with roller bearings for smooth movement
Data Source
AI summary
The present invention relates to ambulance cots, cot systems and methods of using the same. In particular, the present invention provides an ambulance cot comprising one or more control features (e.g., a notched ladder rail assembly (e.g., for preventing hot dropping of cot); a hand braking system; and/or team lift rails) and methods of using the same (e.g., to transport a subject (e.g., into and/or from an ambulance)).