Slidable Bar Carriage Exercise Assembly
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Solution Overview
Problem
Conventional Smith machines rely on free weights for exercise resistance, which are cumbersome, pose safety hazards, and require more stabilization, limiting the weight that can be lifted safely without a spotter.
Innovation Solution
Integrating a selectable weight stack system with a Smith bar, utilizing a carriage assembly and pulley system to provide adjustable exercise resistance, allowing the Smith bar to be secured and used with cable ends that can be attached to either the carriage or the bar for varying resistance levels, eliminating the need for free weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If free weights are used for exercise resistance in a Smith machine, then the device can provide exercise resistance, but the weights are cumbersome to move and store, and present severe safety hazards
Solution Approach 1:
The patent extracts the weight storage function from the exercise area and places it in a separate weight stack located at the top of the frame. The weight stack can be independently selected and locked, eliminating the need to manually handle and reposition free weights during exercises. This separation removes the safety hazards and cumbersome handling associated with free weights while maintaining exercise resistance capability.
Solution Approach 2:
The patent introduces a cable and pulley system as an intermediary mechanism between the weight stack and the exercise bar. The cable system transmits the resistance force from the selected weight stack to the exercise bar, allowing the user to perform exercises without directly interacting with the weights. This intermediary mechanism eliminates the need to manually move and store weights while providing consistent resistance.
2Force
If free weights are used for exercise resistance, then exercise resistance can be provided, but more stabilization is required, limiting the weight that can be lifted safely without a spotter
Solution Approach 1:
The patent makes the Smith bar multi-functional by enabling it to serve both as a free-weight barbell and as part of a cable-pulley system. The bar can be coupled to the cable system for guided, stabilized movement with selectable resistance, or used independently for free-weight exercises. This universality allows the same bar to provide exercise resistance with varying stabilization requirements based on the selected mode of operation.
Solution Approach 2:
The cable and pulley system acts as an intermediary that provides mechanical guidance and stabilization for the exercise bar. The cable system maintains a consistent path and orientation for the bar during movement, reducing the stabilization burden on the user. This intermediary mechanism enables safer exercise execution with reduced stabilization requirements compared to free-weight operations.
3Adaptability or versatility
If a selectable weight stack system is integrated with the Smith bar, then adjustable exercise resistance can be provided, but the device complexity increases
Solution Approach 1:
The patent merges the weight stack selection mechanism with the existing frame structure of the Smith machine. The weight stack is positioned at the top of the frame and integrated with the cable system, combining multiple functions (weight storage, resistance selection, and cable anchoring) into a unified assembly. This merging approach provides adjustable exercise resistance while minimizing additional complexity by utilizing the existing structural framework.
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
Enables safer and more efficient lifting by allowing greater weight to be lifted with reduced stabilization, as the selectable weight stack system provides adjustable resistance, enhancing the versatility and safety of exercises performed with the Smith bar.
Implementation Method 1
a carriage assembly with at least one upper and at least one lower pulley. First and second cable ends are reeved around the upper and lower pulleys, respectively
Implementation Method 2
The cable is further reeved around upper and/or lower pulleys on the frame and is coupled to a source of exercise resistance, such as a plurality of stacked weights
Data Source
AI summary
An exercise apparatus includes a frame with a pair of vertical guides. A carriage is slidably carried on each of the guides. Each of the carriages has a locking mechanism to lock the carriage at a selected vertical position and a release to disengage the locking mechanism. A horizontal exercise bar is slidably carried on guide rods. First and second cables are coupled to a selectable exercise resistance, each of the cables having an end selectively coupled to either the respective carriage or to a respective bracket at the end of the exercise bar. Secondary brackets on the exercise bar are configured to engage respective ones of the carriage releases and grab the carriage so as to selectively engage and disengage the locking mechanisms upon axial rotation of the exercise bar and raise and lower the carriages with the exercise bar.