Portable Weightlifting Apparatus with Segmented Housing
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Solution Overview
Problem
Current portable resistance training devices either provide undesirable resistance variation over their range of motion or are too heavy and cumbersome for easy transport and setup.
Innovation Solution
A portable weightlifting device with a separable, tubular housing that can be quickly assembled and disassembled, featuring a pulley system and adjustable mounting options for consistent resistance, allowing for secure attachment to structures and free-standing use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If conventional stretch cords or stretch bands are used in portable resistance training devices, then the devices are lightweight and easy to transport, but the resistance varies undesirably over the device's range of motion
Solution Approach 1:
The housing is divided into three separable segments that can be quickly assembled and disassembled, allowing the device to be lightweight and portable while maintaining structural integrity during use. The segmentation enables easy transport without compromising the weight stack's stability during exercise.
Solution Approach 2:
The patent uses a weight stack with selectable weights that can be adjusted to provide consistent resistance throughout the range of motion. The pulley system redirects the cable to maintain optimal tension angles, ensuring consistent resistance delivery while keeping the device lightweight and portable.
2Reliability
If traditional weight machines with cables and pulleys are used, then consistent resistance is provided over the entire range of motion, but the machines are too heavy to be easily transported
Solution Approach 1:
The housing is segmented into three separable sections that can be quickly assembled and disassembled, enabling the machine to be transported in a compact configuration while maintaining the full functionality and consistent resistance delivery when assembled and in use.
Solution Approach 2:
The essential components (weight stack, pulley system, cable mechanism) are extracted from a traditional monolithic machine structure and reconfigured into a separable housing system. This allows the heavy components to be compacted for transport while maintaining their full functional capability when assembled.
3Weight of moving object
If free weights are used, then the weights are lighter and more portable than weight machines, but they require heavy benches or seats and can cause damage to walls and flooring
Solution Approach 1:
The pulley system acts as an intermediary between the weight stack and the user, redirecting the cable force through optimal angles to reduce direct impact on surrounding surfaces. The housing structure provides a stable, damage-free mounting point that eliminates the need for heavy benches or seats while preventing damage to walls and flooring during exercise.
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
The device provides consistent resistance over its range of motion, is highly portable, and easy to set up, accommodating various exercises while minimizing damage to surrounding surfaces.
Implementation Method 1
A first pulley is mounted to the housing adjacent the first aperture. A second pulley is adjustably mounted between the first pulley and the user interface for operatively engaging and variably redirecting the flexible member.
Implementation Method 2
The flexible member extends upwardly from the weight, operatively engages the first pulley, and extends through the first aperture. The member terminates in a user interface, such as a handle or a cuff.
Data Source
AI summary
A portable weightlifting device having a segmented, separable, tubular housing that can be quickly and easily assembled and disassembled by a single user. The housing contains a movable weight that is coupled to a user interface outside of the housing by a cable that traverses two pulleys. One of the pulleys can be adjustably positioned for allowing a user to perform a multitude of exercises.