Metal Floor Vent Structure to Prevent Concrete Chipping
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Solution Overview
Problem
Conventional vent devices in ventilated concrete floors suffer from chipping, deformation, and difficulty in cleaning due to exposed edges and funnel-shaped passageways, which can obstruct airflow and lead to concrete damage.
Innovation Solution
A vent device with metallic sidewalls featuring outwardly extending upper portions flush with the concrete floor surface, a prismatic passageway design with a wider inlet and narrower outlet, and a method of direct mounting on support beams for efficient airflow and debris removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional plastic vent devices are used, then the vent can be easily installed, but the vent deforms under concrete pressure and becomes susceptible to chipping
Solution Approach 1:
The patent changes the material parameter from plastic to metal, which fundamentally alters the mechanical properties including strength, stiffness, and resistance to deformation. This material substitution resolves the contradiction by providing a vent device that maintains its shape under concrete pressure while still being installable, thereby eliminating both deformation and chipping issues simultaneously.
Solution Approach 2:
The vent device employs a composite structure combining metal sidewalls with concrete embedding. The metal provides structural integrity and resistance to deformation, while the concrete integration provides additional support and prevents chipping. This composite approach allows the vent to withstand construction pressures without deforming or causing concrete damage.
2Device complexity
If funnel-shaped passageways are used, then the vent structure is simple, but debris lodges and obstructs airflow making cleaning difficult
Solution Approach 1:
The patent inverts the conventional funnel shape by making the passageway prismatic with a wider inlet and narrower outlet. This inversion prevents debris from lodging in the passageway because materials cannot become trapped in the uniform or slightly tapered geometry. The design maintains simplicity while dramatically improving cleanability and airflow efficiency.
Solution Approach 2:
The patent employs a prismatic passageway geometry that eliminates sharp corners and irregular surfaces where debris could accumulate. The smooth, uniform cross-section allows for complete airflow and easy removal of any debris that enters, maintaining both structural simplicity and operational ease.
3Reliability
If vents are embedded in cast concrete floor, then the vent is secured, but exposed concrete edges are susceptible to chipping
Solution Approach 1:
The patent changes the dimensional parameters of the vent device, specifically making the sidewalls taller than conventional vents. This increased height allows the vent to be embedded deeper into the concrete floor, creating a more secure installation while eliminating exposed concrete edges that would otherwise be susceptible to chipping.
Solution Approach 2:
The vent device is designed to be installed before the concrete is fully cured, allowing the concrete to flow around and secure the vent in place. This preliminary installation ensures the vent is firmly embedded and surrounded by continuous concrete, preventing future chipping at the periphery while maintaining secure attachment.
Data Source
AI summary
A vent for a ventilated concrete floor structure, which includes parallel spaced-apart support beams and a concrete floor thereover, comprises upstanding longitudinally-extending sidewalls interconnected in transversely spaced-apart relation and a passageway therebetween for releasing air from at least one air duct underneath the floor to a ventilated space thereover. The passageway has an inlet at bottoms of the sidewalls communicated with an air duct and an outlet at tops of the sidewalls at an upper surface of the floor. The sidewalls are metallic. Upright sidewall portions extend in a height direction of the vent and upper sidewall portions defining the sidewall tops extend transversely outwardly from the upright portions to provide upper surfaces arranged substantially flush with the upper floor surface. The passageway is substantially prismatic, and the rectangular inlet opening is wider than the rectangular outlet opening. Lower sidewall portions are configured to rest on the support beams.