Door Holding Device With Pivot And Clamp For Firefighting Airflow Control
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Solution Overview
Problem
Conventional door holding devices used in firefighting operations, such as triangular wedges, fail to securely fix doors in place against forces from all directions and lack efficient removal mechanisms, posing risks to firefighters and civilians due to uncontrolled airflow and rapid fire progression.
Innovation Solution
A door holding device comprising a first arm assembly, a second arm assembly, a pivot device, and a movable clamping mechanism that securely attaches to a structure, allowing for adjustable door positioning and quick release, along with an optional wireless communicator for communication and location assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional triangular wedges are used to hold doors, then the device is simple to manufacture and deploy, but the door cannot be securely fixed against forces from all directions during firefighting operations
Solution Approach 1:
The door holding device is divided into multiple functional components: a clamp assembly with movable and stationary clamps, a pivoting arm assembly with multiple arms, and a release mechanism. This segmentation allows each component to perform its specific function efficiently while maintaining overall reliability under firefighting conditions.
Solution Approach 2:
The device merges multiple functions into a single integrated system: the clamp assembly provides secure attachment to the door frame, the pivoting arm assembly positions the holder against the door, and the release mechanism enables quick removal. This combination ensures the door remains securely held against forces from all directions while maintaining operational simplicity.
2Ease of operation
If conventional wedges are used, then the device is simple in structure, but there is no efficient mechanism for rapid removal during emergency egress
Solution Approach 1:
The release mechanism transforms the static door holding device into a dynamically controllable system. The movable clamp, controlled by a release lever, allows the operator to quickly transition from a secured state to a released state, enabling rapid door opening during emergency egress while maintaining secure holding during normal operation.
3Productivity
If the door is kept closed to control airflow and limit fire spread, then fire progression is restricted, but firefighters need to advance hose lines through the door
Solution Approach 1:
The device applies partial action by holding the door partially open rather than fully open or fully closed. This allows sufficient space for firefighters to advance hose lines and perform operations while maintaining enough closure to control airflow and limit fire spread, achieving a balanced solution that addresses both firefighting productivity and airflow control.
Data Source
AI summary
A door holding device and system is disclosed that holds a door in a partially open configuration. The door holding device includes a first arm assembly that attaches to a door, a second arm assembly that attaches to a door frame, a movable clamping mechanism that clamps the second arm assembly to the door frame, and a pivot device that allows the first arm assembly and the second arm assembly to pivot with respect to each other.