Oven rack assemblies and methods of use
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Solution Overview
Problem
Conventional oven rack retention mechanisms are complex and require moving parts to withstand high temperatures, making them cumbersome and prone to failure during self-cleaning cycles in kitchen ovens.
Innovation Solution
An oven rack assembly with a subframe featuring integral downwardly depending movement restrictors that engage the oven cavity's liner ribs, allowing for secure retention without additional moving components, thus simplifying construction and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional spring-biased flippers, cams, and rivets are used for retention mechanisms, then the oven rack can be retained in position, but the device complexity increases and reliability decreases due to moving parts failing at high temperatures
Solution Approach 1:
The patent removes all moving parts (springs, flippers, cams, rivets) from the retention mechanism, extracting the problematic components that caused complexity and reliability issues. The retention function is achieved through a simple downwardly depending structure that engages with the oven cavity rib without any moving elements.
Solution Approach 2:
The retention mechanism is segmented into a fixed downwardly depending structure integrated with the rack support, separating the retention function from the support function. This segmentation allows each component to perform its specific function without requiring complex interactions between multiple parts.
2Reliability
If complex assemblies with moving parts are used, then retention can be achieved, but ease of manufacture decreases due to multiple components requiring assembly
Solution Approach 1:
The patent merges the retention function directly into the rack support structure through an integrated downwardly depending engagement feature. This eliminates the need for separate retention components and their associated assembly operations, significantly simplifying manufacturing while maintaining reliable retention.
3Ease of manufacture
If integral downwardly depending movement restrictors are used, then ease of manufacture improves and device complexity decreases, but retention strength may be reduced compared to complex mechanical assemblies
Solution Approach 1:
The downwardly depending engagement feature is designed with a curved or contoured surface that complements the shape of the oven cavity rib. This curvature ensures optimal contact and engagement strength, allowing the simple integral structure to achieve retention strength comparable to or exceeding complex mechanical assemblies.
Solution Approach 2:
The engagement feature is designed with localized geometric properties (specific angles, depths, and contours) optimized for engaging the oven cavity rib. This local optimization ensures that the simple integral structure achieves maximum retention strength at the critical engagement point without requiring overall structural complexity.
Data Source
AI summary
An oven rack assembly and method of use includes an oven rack configured to support items to be cooked or otherwise heated within an oven cavity, a slide system coupled to the oven rack, and a subframe coupled to the slide system. The slide system is configured to move the oven rack between a retracted position and an extended position where the oven rack has moved forwardly relative to the retracted position. The subframe includes lateral support portions, where each of the support portions include an integral, downwardly depending movement restrictor for retaining the subframe in a stowed position within an oven cavity.