Straddle Door Mount Exercise System Reducing Torsional Stress
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Solution Overview
Problem
Existing door-mounted resistance training systems impose tortional forces on doors, leading to bending, warping, or breaking, and require a perpendicular user orientation, which is inconvenient for small rooms.
Innovation Solution
A straddle door mount exercise system that includes a door sleeve with a U-shaped channel, a security anchor with an adjustable tether, and a resistance cable device with cable stops, allowing the system to be securely mounted to a door in a straddle configuration and enabling exercises with minimal tortional force on the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional door-mounted resistance training system is used, then resistance training can be performed at home, but tortional forces are imposed on the door causing bending, warping, or breaking
Solution Approach 1:
Instead of mounting the resistance system perpendicular to the door (conventional approach), the patent inverts the mounting orientation to straddle across the door width. The cable device is mounted on one side of the door and the anchor on the other side, causing the force to pull directly across the door width rather than twisting on the door edges. This inversion of mounting orientation eliminates the tortional forces that cause door damage.
2Adaptability or versatility
If a conventional door-mounted resistance training system is used, then resistance training can be performed, but the door latch may bend or break causing sudden door opening and user injury
Solution Approach 1:
The patent inverts the conventional mounting approach by straddling the door rather than mounting perpendicular to it. This orientation change redirects the force vector to pull directly across the door width, away from the latch mechanism. By reversing the force application direction, the system prevents latch bending or breaking that would cause sudden door opening and potential injury.
3Adaptability or versatility
If a conventional door-mounted resistance training system is used, then exercise can be performed, but the user must position themselves in a purely perpendicular orientation to the door frame which is inconvenient for small rooms
Solution Approach 1:
The patent inverts the conventional perpendicular mounting orientation to a straddled configuration across the door width. This orientation reversal allows users to perform exercises parallel to the door rather than perpendicular to it, providing greater positioning flexibility and making the system more suitable for small rooms where perpendicular positioning may be impractical.
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 system effectively reduces the risk of door damage and user injury by aligning the force directly with the door's width, eliminating tortional forces, and providing a versatile exercise setup suitable for small spaces.
Implementation Method 1
The resistance cable device can include one or more elastic bands having handles along each end
Data Source
AI summary
An exercise system includes a door stop and a door sleeve having an elongated sleeve body with a U-shaped channel along the bottom surface. The door sleeve is positioned along the top wall of a door with the sides of the sleeve straddling the top wall. A security anchor connects the back of the door sleeve to the back of the door via an adjustable length tether. A resistance cable device is provided and includes an elastic band having handles along each end. The band is positioned across the top of the door sleeve and is retained in place by a pair of cable stops extending upward from the top surface of the door sleeve.