Tool Cart Backpack Straps and Retractable Dolly for Rooftop Transport
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Solution Overview
Problem
The existing methods for transporting tools and equipment to rooftops for maintenance or repair are unsafe and physically strenuous, often requiring multiple trips up and down ladders or stairs, leading to significant safety and physical strain on individuals.
Innovation Solution
A tool cart with backpack straps and a retractable dolly attachment that allows for safe and efficient transport of equipment, featuring a hollow arched base, wheels, retractable hoist ring, and a dolly system to minimize manual carrying and reduce strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a user carries equipment up and down ladders or stairs multiple times, then the equipment can be transported to the roof, but the safety risk and physical strain on the user increases significantly
Solution Approach 1:
The patent combines the tool cart with backpack straps that can be worn on the back, merging the functions of a cart and a backpack carrier. This allows the user to wear the cart on their back and climb ladders or stairs safely without carrying equipment in hands, thereby improving safety while reducing physical strain during multiple trips.
Solution Approach 2:
The patent introduces an intermediary mechanism (the backpack-style cart with shoulder straps and waist belt) between the user and the equipment. This intermediary distributes the weight of the equipment across the user's back and shoulders, reducing the physical strain on arms and hands while allowing safe climbing, thus resolving the contradiction between safety and ease of operation.
2Ease of operation
If a user uses one hand to carry tools up the ladder, then the equipment can be transported, but the uneven strain on the body causes pain and increases safety risk
Solution Approach 1:
The patent merges the cart functionality with a backpack carrier system, allowing equipment to be worn on the back rather than carried in one hand. This distributes the weight evenly across both shoulders and the back, eliminating the uneven strain and pain caused by one-handed carrying while still enabling equipment transport up ladders.
3Adaptability or versatility
If a user ropes up equipment with no secure connection point, then the equipment can be secured, but the connection is unsafe and unreliable
Solution Approach 1:
The patent extracts the secure connection function by incorporating a dedicated hoist ring with a secure attachment mechanism directly into the cart structure. This provides a reliable, built-in connection point for ropes or hoisting equipment, eliminating the unsafe practice of trying to rope up equipment without a secure attachment point.
Solution Approach 2:
The patent makes the cart self-sufficient by integrating a secure hoist ring and attachment mechanism directly into its structure. The cart provides its own secure connection point without requiring external ropes or improvised securing methods, thereby improving connection safety and reliability while maintaining adaptability for various securing needs.
4Quantity of substance
If multiple trips are made to transport all equipment, then all necessary tools can be brought to the roof, but the time consumption and physical stress increase
Solution Approach 1:
The patent combines the functions of multiple trips into a single trip by creating a cart with sufficient capacity to hold all necessary equipment while being wearable on the back. This allows the user to transport all equipment in one go rather than making multiple trips, thereby reducing time consumption and physical stress while maintaining full equipment capacity.
Data Source
AI summary
A tool cart has a compartment in the middle to store tool kits or other equipment. The tool cart contains a retractable dolly and a pair of straps to allow a user to carry it on their back. The side surfaces of the tool cart also contain compartments to store more tools or other equipment. The tool cart also has an extra carry-on tray to store more tools.