Pressure Cooker Handle Coupling for Safe Lid Locking and Cleaning
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Solution Overview
Problem
Existing pressure cookers lack effective safety measures to prevent pressure buildup when the lid is incorrectly placed, and they are not designed for easy cleaning of components.
Innovation Solution
A pressure cooker design featuring a coupling device that mechanically decouples and recouples the lid and vessel handles, using a bayonet lock and sealing ring mechanism, which includes a compression spring and control cam system to ensure fluid-tight closure and easy opening, while allowing for separate cleaning of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lid and vessel are permanently connected for safety, then pressure buildup is prevented, but cleaning becomes difficult
Solution Approach 1:
The coupling device is divided into two separable coupling elements: a first coupling element on the lid and a second coupling element on the vessel. These elements can be mechanically decoupled from each other, allowing the lid to be separated from the vessel for cleaning purposes, while still providing safety functionality when properly assembled.
2Ease of operation
If the coupling device is designed for easy decoupling, then cleaning is facilitated, but safety may be compromised
Solution Approach 1:
The coupling elements are designed with asymmetric features including control cam branches with specific geometries, separating elements that create directional movement, and guide recesses that ensure proper alignment. This asymmetric design ensures that decoupling can only occur in the intended direction and under controlled conditions, maintaining safety while enabling cleaning.
Solution Approach 2:
The coupling device includes a control cam mechanism with separating elements that prepare the coupling elements for decoupling by creating mechanical separation in a controlled manner. The guide recesses and control cam branches work together to ensure that decoupling happens smoothly and safely before the lid is fully removed for cleaning.
3Ease of operation
If mechanical decoupling is implemented, then component separation is enabled, but device complexity increases
Solution Approach 1:
The coupling device integrates multiple functions into a unified mechanism: the control cam branches serve both as guiding elements and as actuating elements for the separating elements. The guide recesses combine alignment and movement control functions. This merging of functions reduces the number of separate components needed, simplifying the overall device despite the sophisticated decoupling capability.
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 design prevents pressure buildup by ensuring correct lid placement and facilitates easy cleaning by allowing the lid handle to be removed and the components to be cleaned separately, enhancing safety and usability.
Implementation Method 1
a compression spring (8) which pushes the two coupling elements (1, 2) apart from one another
Implementation Method 2
The control cam branches (4a, 4b) are separated from one another (as recesses embedded in the top of the handle 3 and running transversely to the longitudinal axis of the handle) when viewed in the longitudinal direction of the handle 3 by a separating element 14 in the form of a wedge
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
The invention relates to a pressure cooker having a lid comprising a lid handle and a cooking vessel comprising a vessel handle, the cooking vessel being closable in a fluid-tight manner with the lid by means of a closure mechanism by the lid handle and the vessel handle being placed one on top of the other, characterised in that one of the two handles comprises a coupling group having two coupling elements which can be mechanically coupled to each other and mechanically decoupled from each other again, and the other of the two handles comprises a coupling device designed for the said coupling and/or the said decoupling such that, when the lid handle and the vessel handle are placed one on top of the other, the two coupling elements are either mechanically decoupled from each other or mechanically coupled to each other by means of the coupling device, as a result of which the said fluid-tight closing of the cooking vessel is effected with the lid by means of the closure mechanism.