Oval Lockout Shaft for High-Strength Webbing Securement
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Solution Overview
Problem
Existing webbing securing systems, particularly those using tensioning devices like ratchets, often fail to provide sufficient strength for securing fragile or critical items, posing a risk of injury or failure.
Innovation Solution
A lockout shaft designed to enhance the strength of webbing by incorporating a hollow cylindrical body with an oval wedge member and ratchet gear, allowing webbing to be wrapped around an oval trajectory, providing additional holding power equal to or greater than the webbing itself.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If webbing is used with a tensioning device like a ratchet to secure an item, then the webbing can be tightened and secured, but the securing strength is insufficient for fragile or critical items
Solution Approach 1:
The lockout shaft employs an asymmetric oval-shaped aperture that is narrower in the vertical dimension and wider in the horizontal dimension. This asymmetric geometry creates a mechanical interlock with the webbing that prevents vertical movement while allowing horizontal positioning, thereby significantly increasing the securing strength and reliability for critical items
Solution Approach 2:
The lockout shaft acts as an intermediary component between the webbing and the item being secured. It inserts into the webbing and provides a structural reinforcement point that distributes loads and prevents webbing failure, effectively mediating the stress between the webbing and the secured load
2Strength
If a lockout shaft with oval wedge member is inserted into webbing, then additional holding power is provided, but the device complexity increases
Solution Approach 1:
The lockout shaft is segmented into distinct functional components: the hollow cylindrical body providing structural support, the oval wedge member providing the asymmetric locking geometry, and the ratchet gear providing tensioning capability. This segmentation allows each component to be optimized independently while maintaining overall simplicity
Solution Approach 2:
The oval wedge member is nested within the hollow cylindrical body, and the ratchet gear is integrated into the structure. This nesting arrangement consolidates multiple functions into a compact assembly, reducing the overall device complexity while maintaining the enhanced holding power
3Strength
If webbing is wrapped around an oval trajectory to increase strength, then the operational strength is significantly increased, but the ease of operation decreases
Solution Approach 1:
The lockout shaft incorporates a ratchet gear that enables dynamic tensioning of the webbing. The ratchet allows the webbing to be easily tightened by rotating the gear in one direction, while preventing reverse movement. This dynamic mechanism maintains ease of operation despite the complex oval trajectory requirement
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 lockout shaft significantly increases the operational strength of webbing, ensuring securement of critical items without interfering with the tensioning device, is easy to use, and is cost-effective with minimal maintenance.
Implementation Method 1
The wedge member is comprised of a first section and a second section, each having an outer surface, an inner surface, and a cavity substantially centrally located on the first section. The wedge member is inserted into the body so that the inner surfaces are pressed onto each other... the outer surfaces form an oval trajectory
Data Source
AI summary
An example embodiment of a lockout shaft is provided that is used in combination with a tensioning device, such as a manual or automatic ratchet, which is used to tighten (or release) webbing that secures an item. The lockout shaft is capable of providing additional strength to the holding power of the webbing, with the additional strength being equal or greater to the strength of the webbing itself.