Four-Pivot Grill Lid Hinge for Heavy Ceramic Sealing
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Solution Overview
Problem
Existing hinge mechanisms for barbeque grills and smokers, especially those with heavy ceramic lids, are inconvenient and unsafe due to the need to lift the lid's weight during opening and closing, and often require manual or spring-assisted mechanisms that can lead to air leakage and mechanical failure.
Innovation Solution
A four-pivot axis linkage design that uses the lid's weight to maintain the open position without springs or latches, with optional spring assist for heavier lids, allowing balanced weight distribution and reduced operator effort, and adjustable mounting for concentricity compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single rear pivot axis hinge is used, then the lid can be attached to the tub, but the operator must lift the bulk of the lid's weight and the design is awkward and dangerous
Solution Approach 1:
The patent employs support struts that act as counterweights to balance the heavy ceramic lid. These struts are positioned to provide mechanical support at multiple points, distributing the lid's weight and reducing the effort required by the operator to open and close the lid, thereby improving both safety and ease of operation
Solution Approach 2:
The patent introduces support struts as intermediary elements between the lid and the tub. These struts serve as mediators that transfer and distribute the lid's weight, providing stable support during the opening and closing operations, which resolves the contradiction between safety and operational ease
2Ease of operation
If a torsion spring powered latching mechanism is used, then the lid can be automatically engaged, but the lid supporting bands may bend and the lid may fall out and break
Solution Approach 1:
The patent removes the problematic torsion spring powered latching mechanism entirely. Instead of using a complex automatic engagement system with springs and levers, the design relies on simplified support struts and friction-based engagement, eliminating the risk of band bending and lid ejection while maintaining ease of operation
Solution Approach 2:
The patent replaces the complex, potentially failure-prone torsion spring mechanism with simpler, more robust components. The design uses durable support struts and friction-based engagement that are less prone to catastrophic failure, effectively trading the automatic engagement complexity for mechanical simplicity and reliability
3Reliability
If support struts are used with manual engagement, then the lid can be held in open position, but the operator must place hands near the heat source to engage and disengage the struts
Solution Approach 1:
The patent extends the support strut engagement mechanism along the side edges of the lid, moving the engagement points away from the center and heat source area. This spatial redistribution allows the operator to engage and disengage struts from safer positions at the periphery, reducing heat exposure while maintaining lid support stability
Solution Approach 2:
The support struts serve as intermediaries that extend the operator's reach and provide engagement points at safer distances from the heat source. These struts mediate between the operator's hand and the lid, allowing engagement from positions that minimize heat exposure while still providing stable lid support
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 mechanism safely holds the lid open, maintains a tight seal, and requires minimal operator effort to open and close, reducing the risk of mechanical failure and air leakage, while accommodating manufacturing variances in ceramic grills.
Implementation Method 1
A four-pivot axis linkage design that uses the lid's weight to maintain the open position without springs or latches
Data Source
AI summary
A hinge mechanism for the lids of barbeque grills and smokers, especially for use with ceramic grills and smokers that have very heavy lids. A barbeque grill/smoker includes a base tub and a lid. The invention pivotally couples the base tub to the lid using a four pivot axis linkage. The pivotal coupling allows reciprocal movement from a lid closed position to a lid open position. The hinge mechanism may include a spring assist feature.