Two-Piece Pressure Cooker Handle for Stronger Screw Mounting
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Solution Overview
Problem
Pressure cookers face issues with handle mounting strength and packaging size due to the risk of damage from over-tightening screws, especially when using polymeric materials, and the need for larger packaging to accommodate attached handle dimensions.
Innovation Solution
A two-piece handle design with a common extended coupling nut system that increases mounting strength by ensuring continuous metal-on-metal contact, reducing the risk of damage and allowing for a conventional handle size while minimizing packaging dimensions by sharing nuts for screw attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single-piece handle design is used with polymeric materials, then packaging size can be reduced, but the handle is susceptible to damage from over-tightening of connecting screws
Solution Approach 1:
The handle is divided into two separate pieces: a cover base portion with metal reinforcement and a cover grip portion. This segmentation allows the metal reinforcement to bear the mounting stress from screw tightening while the polymeric grip portion remains undamaged, resolving the contradiction between packaging size reduction and damage prevention.
Solution Approach 2:
The handle assembly combines metal reinforcement material in the cover base portion with polymeric material in the cover grip portion. This composite structure leverages the high strength and damage resistance of metal for mounting while maintaining the desirable properties of polymeric materials for the user-facing grip area.
2Strength
If a two-piece handle design with separate nuts is used, then mounting strength is increased, but packaging dimensions increase
Solution Approach 1:
The cover base portion and cover grip portion are designed to share a common nut location. The cover grip portion is positioned such that its mounting interface aligns with the nut already present in the cover base portion, eliminating the need for separate nuts and reducing packaging volume while maintaining mounting strength.
3Ease of operation
If conventional handle size is used, then packaging size increases, but ease of operation is maintained
Solution Approach 1:
By segmenting the handle into a compact cover base portion and a separate cover grip portion that attaches at the point of use, the design maintains conventional handle dimensions for ease of operation while reducing the overall packaging volume required during shipping and storage.
Data Source
AI summary
An improved pressure cooker design including a two-piece handle utilizing a common connection point to a cover to increase resistance to damage due to over tightening of connecting screws while simultaneously allowing the use of a conventional handle size with a reduction in overall packaging size. The two-piece handle design includes a cover base portion and a cover grip portion wherein a pair of nuts are mounted within the cover base portion to receive coupling screws at both ends of the nuts for joining the cover and the cover grip portion to the cover base portion. Tightening of the coupling screws provides for continuous metal on metal contact eliminating damage to weaker polymeric materials while allowing a consumer to quickly and easily attach the cover grip portion of the two-piece handle to the cover base portion at a point of use so as reduce overall packaging dimensions.