Ratchet Strap with Segmented Standoffs for Drainage
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Solution Overview
Problem
Existing fastening systems, such as cable ties, fail to adequately secure structures like pipes in adverse environmental conditions and do not allow for exposure while maintaining adjustability and reliability.
Innovation Solution
A fastening system comprising a strap with teeth and standoffs, paired with a ratchet head featuring dual inlet openings and pawls, allowing for adjustable securement around objects without continuous surface contact, which enhances durability and breathability by preventing liquid trapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous surface is formed by the strap contacting the object, then the strap provides stable support, but liquid accumulates between the strap and the object causing corrosion
Solution Approach 1:
The strap surface is segmented into discrete contact points through protrusions (teeth and standoffs) rather than forming a continuous surface. This segmentation allows liquid to drain through the gaps between contact points, preventing accumulation and corrosion while maintaining structural stability through the distributed contact points.
2Strength
If the strap is tightly cinched around the object, then securement strength is improved, but the strap cannot be adjusted once tightened
Solution Approach 1:
The ratchet mechanism transforms the static strap into a dynamic system that allows progressive tightening through ratchet engagement. The pawl and ratchet teeth enable unidirectional movement for tightening while preventing backtracking, providing both adjustability during installation and fixed securement when tightened.
3Ease of operation
If the strap material is thin and flexible, then the strap can wrap around objects easily, but the strap lacks durability in adverse environmental conditions
Solution Approach 1:
The strap employs a composite structure combining a flexible base material with integrated protrusions (teeth and standoffs) that provide both mechanical engagement and protective spacing. This composite design maintains flexibility for wrapping while adding structural elements that enhance durability and prevent direct material-to-material contact in harsh environments.
4Ease of manufacture
If the strap has a smooth continuous surface, then manufacturing is simpler, but the strap traps liquid against the object causing corrosion
Solution Approach 1:
The manufacturing process incorporates protrusions (teeth and standoffs) that segment the strap surface. While this adds a manufacturing step, it creates a drainage-friendly surface that prevents liquid accumulation and corrosion, outweighing the additional manufacturing complexity through improved product reliability.
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 secures structures in harsh environments, maintains adjustability, and prevents liquid accumulation by ensuring only the distal tips of standoffs and teeth contact the surface, enhancing durability and resistance to corrosion.
Implementation Method 1
a ratchet head having a ratchet pawl operable to engage the plurality of teeth to adjustably receive and secure the strap
Data Source
AI summary
A fastening system includes a ratchet head and a strap having a pair of side edges, a first side defining a base surface, and a second side having a plurality of teeth. A pair of troughs extend in a longitudinal direction and each is positioned interstitially between the plurality of teeth and a side edge. A plurality of standoffs are provided on the second side of the strap along each of the side edges, the standoffs extending from the base surface at least as far as a distal extent of the plurality of teeth. The ratchet head has a ratchet pawl operable to engage the plurality of teeth to adjustably receive and secure the strap.