Weight Resistance Apparatus With Linear Actuator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing exercise machines fail to provide maximum concentric, eccentric, and isometric resistance throughout an entire exercise repetition, limiting the effectiveness of strength and conditioning training.
Innovation Solution
A weight resistance apparatus featuring a T-shaped member with a linear actuator system, cable guide rails, and load cells, allowing for controlled variation in cable length and resistance direction to simulate concentric, eccentric, and isometric contractions, enabling maximum force generation and customizable training protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If free weights are used for resistance training, then strength and power are improved, but resistance is constant throughout the repetition and does not provide maximum eccentric load
Solution Approach 1:
The patent applies dynamics by replacing static free weights with a dynamic resistance system. The linear actuator continuously adjusts cable tension throughout the exercise repetition, enabling resistance to vary based on muscle contraction phase (concentric, eccentric, or isometric). This allows the system to adapt resistance in real-time to match the user's muscle force capabilities at different points in the movement cycle.
Solution Approach 2:
The patent changes the resistance parameter dynamically during the exercise. By controlling the linear actuator's force output, the system can adjust the tension in the cable from one phase to another within a single repetition. This parameter change enables the system to provide maximum eccentric resistance during the lowering phase while maintaining appropriate concentric resistance during the lifting phase.
2Force
If fixed weight machines are used, then resistance is provided throughout the movement, but the resistance does not adapt to maximize eccentric force generation
Solution Approach 1:
The patent incorporates feedback through load cells that measure the user's muscle force in real-time. This feedback is fed to the linear actuator controller, which adjusts the resistance accordingly. The system can detect when the user is generating maximum eccentric force and automatically adjust the cable tension to match, thereby optimizing the training stimulus without requiring manual adjustment.
Solution Approach 2:
The system performs self-adjustment based on real-time force measurement. The linear actuator automatically modulates its own output force in response to load cell feedback, eliminating the need for manual intervention. The system serves itself by continuously optimizing resistance based on the user's physiological response during the exercise.
3Adaptability or versatility
If elastics and exercise bands are used, then resistance increases with stretch, but resistance is insufficient compared to heavy free weights
Solution Approach 1:
The patent replaces the passive elastic mechanical system with an active controlled mechanical system. Instead of relying on the inherent elasticity of rubber bands to provide resistance, the system uses a linear actuator with precise force control. This substitution allows the system to achieve the resistance progression benefits of elastics while providing magnitude of resistance comparable to heavy free weights through controlled actuator force.
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 users to exert maximum concentric, eccentric, and isometric force throughout an entire exercise cycle, enhancing strength and conditioning training while minimizing the risk of injury and allowing for personalized training protocols.
Implementation Method 1
The first member houses a linear actuator system comprising a lead or power screw and a linear actuator carriage
Implementation Method 2
a linear actuator system comprising a lead or power screw and a linear actuator carriage
Implementation Method 3
The linear actuator carriage further includes at least two vertical cable plates, a horizontal plate, a plurality of linear bearings secured to the underside of the horizontal plate and at least one acme nut
Data Source
AI summary
A weight resistance apparatus including a threaded lead screw, a drive belt mechanically coupled with the lead screw, a lead screw that traverses a linear actuator carriage; at least one cable, and a cross bar member having at least one cavity and at least one aperture, whereby one end of the lead screw is secured within a first cavity and wherein the at least one cable extends through the at least one aperture.