Harness Lifter With Arm Loops For Centralized Force Distribution
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Solution Overview
Problem
Existing lifting systems for heavy and bulky objects often lack the ability to distribute lifting forces centrally, leading to inefficient and unsafe lifting practices, especially when attempting to lift objects higher than possible with shoulder and torso strength alone.
Innovation Solution
A lifter system comprising a harness with a central buckle and adjustable arm loops that allow for centralized distribution of lifting forces, enabling two people to lift heavy objects with a single central lifter strap, and allowing for additional lifting height by using arm loops to pull the buckle and harness higher than with shoulder and torso lifting alone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a single central lifter strap is used with centralized buckle, then lifting force distribution is improved and lifting height is increased, but device complexity increases due to the need for precise central alignment and multiple connection points
Solution Approach 1:
The lifting system is divided into separate functional components: shoulder harnesses, arm loops, and a central buckle assembly. Each component can be independently adjusted and positioned to achieve centralized force distribution while maintaining manageable complexity through modular design
Solution Approach 2:
The central buckle serves multiple functions: it connects the lifter strap, anchors the arm loops, and provides a centralized attachment point for force distribution. This multi-functionality reduces the need for separate components, managing complexity while improving force distribution
2Length of moving object
If arm loops are added to the harness system, then lifting height capability is improved, but ease of operation decreases due to additional components to manage and position
Solution Approach 1:
The arm loops are designed to be adjustable in length and position, allowing users to dynamically configure the system based on the lifting task. This adjustability enables achieving greater lifting heights while maintaining ease of operation through user-friendly customization
Solution Approach 2:
The arm loops act as intermediaries between the user's arm strength and the central buckle, providing a mechanical advantage that extends lifting capability. The loops are designed to be easily attached and detached, maintaining ease of operation while enabling increased lifting height
3Stability of the object's composition
If the buckle is positioned at the lower central torso, then force distribution across the body is improved, but device complexity increases due to the need for precise positioning and alignment
Solution Approach 1:
The buckle is pre-positioned at the lower central torso during harness assembly, establishing the correct force distribution geometry before lifting begins. This preliminary positioning ensures stable force distribution while reducing the complexity of adjusting position during use
Solution Approach 2:
The harness design allows the buckle to self-position at the lower central torso through the natural geometry of the shoulder straps and body contours. This self-positioning mechanism achieves stable force distribution without requiring complex adjustment mechanisms
Data Source
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AI summary
A lifter system includes a harness, at least one lifting strap carried by a front, central buckle on the harness, and two arm loops connected to the central buckle or to the harness near the central buckle. The arm loops are used to supply supplemental or substitute lifting force during lifting or maneuvering a heavy or bulky object. Preferably, a set of two shoulder harnesses is used by two persons standing face-to-face with a single lifter strap between them threaded through both of the central buckles, wherein the two persons wear the arm loops on their forearms and raise their arms to lift the central buckles, and hence, to lift the lifting strap, to levels higher than may be possible with only force supplied by the harnesses.