Rotating C-Hook Hand Cart for Multi-Load Stability
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Solution Overview
Problem
Existing hand carts lack flexibility and struggle to maintain multiple loads balanced, upright, and separated during lifting and maneuvering, failing to efficiently handle and transport multiple objects without interference or instability.
Innovation Solution
A hand cart design featuring rotating cradles/hooks for handle support, allowing objects to remain upright, and a dual set of C-hooks that adjust with the cart's angle to accommodate loads at any position between horizontal and vertical, enabling zero-radius turning and compact storage, along with a folding handle for easy transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional fixed hooks are used to carry loads, then the cart structure is simple, but the loads cannot remain upright and stable when the cart changes angles or turns
Solution Approach 1:
The patent applies the dynamics principle by making the hooks rotatable rather than fixed. Each hook can rotate independently about its mounting point on the cart frame, allowing the hook and its carried load to automatically adjust their orientation. This rotational freedom enables the load to remain substantially upright even when the cart changes angles or performs zero-radius turns, resolving the contradiction between load stability and structural simplicity.
2Adaptability or versatility
If the cart is designed to carry multiple loads at different positions, then the versatility increases, but the loads may interfere with each other or fall out during maneuvering
Solution Approach 1:
The rotatable hook design allows each load to independently adjust its position and orientation, preventing interference between multiple loads during cart maneuvering. When the cart turns or changes angle, each hook rotates to keep its load upright, maintaining secure retention without requiring complex locking mechanisms.
3Adaptability or versatility
If the cart has fixed-length handles for carrying structures, then the manufacturing is simple, but the cart cannot accommodate loads at varying angles between horizontal and vertical
Solution Approach 1:
The patent makes the handles rotatable about their attachment points on the cart frame. This allows the handles to dynamically adjust their angle relative to the cart body, accommodating loads positioned at varying angles between horizontal and vertical. The rotational capability provides versatility without requiring complex adjustable mechanisms, as the handles naturally follow the cart's movement and orientation changes.
4Ease of operation
If the cart uses standard wheels for turning, then the manufacturing is easy, but the cart cannot perform zero-radius turning for compact storage and maneuvering
Solution Approach 1:
The patent employs independently rotatable wheels that can turn in any direction, enabling zero-radius turning capability. Each wheel can rotate about its own axis and also steer perpendicular to the cart's longitudinal axis, allowing the cart to pivot in place for compact storage and tight maneuvering spaces. This dynamic wheel configuration provides superior turning capability while remaining manufacturable using standard mechanical components.
Data Source
AI summary
A new hand cart apparatus has a frame, two wheels connected to the frame, and a first and a second set of C-hooks connected to the frame. The first set of C-hooks is configured so that its openings face in a first direction when the frame is upright and the second set of C-hooks is configured so that its openings face in a direction opposite to the first direction when the frame is declined. The frame can be pushed forwards in an upright position to insert an object resting on the ground into the first set of C-hooks and can be pulled backwards in a declined position to an insert an object resting on the ground into the second set of C-hooks.