Screw Cap Recess Grip for High-Torque Container Sealing
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Solution Overview
Problem
Conventional covers or caps struggle to provide a secure and stable closure on containers, requiring significant user effort for screwing and unscrewing, especially for larger containers, and often lead to unscrewing over time, complicating transport and handling.
Innovation Solution
A cover or cap with a manual grip, such as a recess or bar, integrated into the upper surface, allowing easy and firm attachment and detachment by engaging fingers and palm, facilitating handling and transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional covers or caps are used on large containers, then the container can be closed and sealed, but the user cannot apply sufficient force or torque to screw the cover firmly and securely
Solution Approach 1:
The patent adds a vertical dimension to the gripping surface by creating a recess in the upper surface of the cover. This recess allows the user's fingers to insert and provide leverage in the vertical direction, converting a limited horizontal gripping action into a more effective multi-directional force application during screwing operations
Solution Approach 2:
The upper surface of the cover is segmented into different functional zones: a flat upper portion for general handling and a recessed portion for enhanced gripping. This segmentation allows each zone to serve its specific purpose, with the recess providing concentrated finger contact points for torque application
2Ease of operation
If conventional covers or caps are used, then the container can be sealed, but the cover cannot be easily unscrewed when excessive force has been applied
Solution Approach 1:
The recess creates additional vertical clearance that allows fingers to engage deeper into the cover structure during unscrewing. This extra dimension provides mechanical advantage by increasing the lever arm length, enabling users to overcome high friction and thread engagement forces with reduced effort
Solution Approach 2:
The recess acts as an intermediary structure between the user's fingers and the cover body. It provides a dedicated interface that amplifies the user's input force through geometric leverage, mediating the force transmission from hand to threads more efficiently
3Ease of operation
If conventional covers or caps are used on large containers, then the container can be closed, but the sealed container is uncomfortable and impractical to move and transport
Solution Approach 1:
By adding vertical depth through the recess feature, the cover transforms the container's upper profile into a more ergonomic shape. This dimensional addition creates a natural hand-resting area that improves grip stability during carrying, converting a flat-topped container into one with enhanced human factors characteristics
Data Source
AI summary
A practical and useful cover or cap to be screwed/unscrewed manually by a user onto a container includes a plastic body exhibiting a recess or recess or a bar, both sized to be gripped by all or part or some of the index through little fingers, side by side, of the user's hand, providing a manual grip or handle for the same user, when screwing the cap on/off the container. The recess is formed between upper and lower walls. The bar extends along a side upper cup of the cover or cap. The cover or cap allows an easy and convenient portability, with one hand, of the container on which the cover or cap is screwed, and also satisfies the user's need to firmly and easily screw the cover or cap onto the container with a high torque, and to unscrew it easily from the same container.