Dual action weightlifting machine with selectorized resistance
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Solution Overview
Problem
Existing exercise machines require users to switch between different exercise components, such as Smith machines and cable pull machines, which is cumbersome and complicates operation.
Innovation Solution
A combined exercise machine that integrates a guided-bar Smith machine and dual cable pull machine, sharing the same weight stacks and allowing seamless transitions between exercises without the need to switch cable connectors, with the lifting bar always connected to the weight stacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate Smith machine and cable pull machines are used, then each machine can be optimized for its specific function, but the user must switch between machines which complicates operation and saves time
Solution Approach 1:
The patent combines a Smith machine and a dual cable pull machine into a single integrated exercise machine. The Smith machine includes a lifting bar with vertical guides and safety tiers, while the cable pull machine includes cable assemblies with pulleys and handles. Both components share the same frame and weight stacks, allowing users to perform multiple exercises without switching machines, thereby simplifying operation while maintaining exercise variety.
Solution Approach 2:
The integrated machine serves multiple functions: it can perform Smith machine exercises (squats, bench presses) and cable pull exercises (arm pulls, chest flies) using the same weight stacks and frame structure. This multi-functionality eliminates the need for separate machines while providing diverse exercise options.
2Ease of operation
If cable connectors need to be switched between Smith machine and cable pull portions, then the machine can be selectorized with weight stacks, but the operation becomes more complex
Solution Approach 1:
The cable assemblies are pre-connected to the weight stacks through the pulley system, and the lifting bar is permanently attached to its cables. This self-service design eliminates the need for users to manually connect or disconnect cables when switching between exercises, reducing operational complexity while maintaining the selectorized weight stack system.
3Ease of operation
If the lifting bar is locked away when not in use, then safety is improved, but the machine requires additional locking mechanisms and operational steps
Solution Approach 1:
The lifting bar is equipped with safety tiers that are pre-positioned at fixed heights along the vertical guides. These safety tiers automatically engage with the lifting bar to prevent it from falling below a certain height, eliminating the need for additional locking mechanisms or manual storage steps while maintaining safety.
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
Simplifies operation by eliminating the need to switch components, provides a more natural workout experience by allowing horizontal and vertical movements, and exercises multiple muscle groups simultaneously.
Implementation Method 1
a pair of vertically moveable pulley carriages connected to front portions of the frame
Implementation Method 2
selectorized (i.e.: it uses weight stacks as opposed to free weights)
Data Source
AI summary
An exercise machine, having: (a) a frame; (b) a pair of weight stacks connected to opposite sides of the frame; (c) a pair of vertically moveable pulley carriages connected to front portions of the frame; (d) a lifting bar assembly connected to a rear portion of the frame; (e) a pair of arm cables, wherein each of the arm cables are connected to one of the pulley carriages and pass around a first series of pulleys such that the weight stacks are lifted when the arm cables are pulled by a user through the pulley carriages; and (f) a pair of lifting bar cables respectively connected to a pair of vertically moveable bar mounts of the lifting bar assembly that pass around a second series of pulleys such that the weight stacks are lifted when the lifting bar of the lifting bar assembly is raised by the user.