Weight Bar Pulley Hub Setup for Secure Elastic Band Resistance
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Solution Overview
Problem
Existing resistance training apparatuses using elastic bands face challenges such as the need for multiple bands to achieve varying resistance levels, insecure attachment methods leading to potential injury or damage, and asymmetrical loading due to hooks, which also cause band wear and inefficiency.
Innovation Solution
An apparatus featuring an elongated bar with pulley hubs at each end, supporting slings with looped connectors that securely hold elastic bands, allowing for balanced and stable resistance exercises without sudden separation, and enabling multiple bands to be stacked for varied resistance levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hooks are used to attach elastic bands to the bar, then the attachment method is simple, but the attachment becomes insecure leading to potential band separation and injury
Solution Approach 1:
The patent introduces a carabiner as an intermediary component between the elastic band and the bar. The carabiner features a gate mechanism that securely engages with the bar while the elastic band attaches to the carabiner, providing a reliable connection that prevents band separation while maintaining ease of attachment and removal.
Solution Approach 2:
The attachment system is divided into separate functional components: the bar, the carabiner with gate mechanism, and the elastic band. This segmentation allows each component to perform its specific function optimally - the bar provides structural support, the carabiner provides secure attachment with controlled release, and the band provides resistance.
2Ease of operation
If hooks are used to attach elastic bands, then attachment is easy, but asymmetrical loading occurs causing inefficient exercise
Solution Approach 1:
The patent addresses asymmetrical loading by ensuring the carabiner and attachment points are positioned symmetrically on the bar, with attachment points equidistant from the center. This symmetrical arrangement ensures balanced force distribution during exercise, improving exercise efficiency while maintaining ease of operation.
3Ease of manufacture
If hooks are used to support elastic bands, then attachment is straightforward, but bands bunch up causing undue wear and premature failure
Solution Approach 1:
The carabiner acts as an intermediary that distributes the load across a wider area of the elastic band compared to a hook. The broader contact surface of the carabiner prevents the band from bunching up at a single point, reducing stress concentration and preventing premature failure, thereby extending band service life.
4Adaptability or versatility
If multiple bands are used to achieve varying resistance levels, then resistance variation is possible, but the number of bands required becomes inconvenient
Solution Approach 1:
The patent enables dynamic configuration of the resistance system by allowing multiple elastic bands to be attached to the same carabiner or to different carabiners on the bar. Users can easily add or remove bands during exercise sessions to vary resistance levels, providing adaptability without requiring a large inventory of bands.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides secure, balanced, and efficient resistance training by preventing band separation and bunching, reducing wear, and allowing for adjustable resistance levels with fewer bands, thereby enhancing user safety and exercise effectiveness.
Implementation Method 1
an apparatus featuring an elongated bar with pulley hubs at each end, supporting slings with looped connectors that securely hold elastic bands
Implementation Method 2
The bar and band are configured such that the exercise moves the bar in a direction causing the band to stretch, causing the band to exert a force on the bar opposing the movement
Data Source
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AI summary
An apparatus is provided for use in resistance training. The apparatus may include a bar with pulley hubs on its ends. The apparatus may further include two slings, each including connectors and a rigid, straight or arc-shaped bar. The slings may be suspended from the pulley hubs and support an elastic band, which may provide resistance during exercise. A footplate may also be provided to hold part of the band to the floor during use.