Elastic Casing Shock Resistant Tether
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Solution Overview
Problem
Existing animal leashes and tethers that are non-elastic fail to effectively mitigate shock to handlers when sudden tension forces are applied, as they do not utilize elasticity to absorb the force.
Innovation Solution
A longitudinally elastic casing surrounds a portion of the tether strand, secured at terminal ends and intermediate points, allowing the casing to stretch and absorb sudden tension forces, keeping the handler's grip position constant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-elastic tether strand is used, then the tether maintains structural stability and predictable behavior, but it transmits shock forces directly to the handler without absorption
Solution Approach 1:
The tether is segmented into a non-elastic strand core and an elastic casing layer, allowing each component to perform its specialized function - the strand provides structural stability while the casing provides shock absorption
Solution Approach 2:
The elastic casing acts as an intermediary between the non-elastic strand and the handler's hand, absorbing shock forces before they reach the handler while allowing the strand to maintain its structural integrity
2Object-affected harmful factors
If an elastic leash strand is used, then shock forces are absorbed, but the handler's grip position becomes unstable and moves during sudden tension
Solution Approach 1:
The system separates the shock absorption function (elastic casing) from the grip interface (hand gripping the casing exterior), allowing the handler to maintain a stable grip on the casing while the casing itself stretches to absorb shock
Solution Approach 2:
The elastic casing acts as a flexible shell that stretches under tension to absorb shock while maintaining its outer dimensions at the grip point, providing a stable surface for the handler's hand
3Ease of manufacture
If the elastic casing is secured only at terminal ends, then the structure is simple to manufacture, but the shock absorption is insufficient along the tether length
Solution Approach 1:
The casing attachment points are segmented along the tether length, creating multiple anchor zones that distribute and enhance shock absorption across different sections of the tether
Solution Approach 2:
The casing is secured at specific locations (terminal ends and intermediate points) where shock forces are most likely to occur, providing enhanced shock absorption at critical points while maintaining overall structural integrity
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 elastic casing effectively absorbs shock by stretching, reducing the distance between the handler's grip and the tension point, resulting in maximum shock resistance and minimizing handler discomfort.
Implementation Method 1
a longitudinally elastic casing that surrounds at least a portion of the length of the tether strand... sudden tension on the tether strand results in longitudinal stretching of the casing allowing the griping hands of the handler to remain in a relatively constant position
Data Source
AI summary
A shock absorbing tether comprising an elongated flexible primary strand which is surrounded by a longitudinally elastic casing having terminal ends and which is attached to the primary strand at each of its terminal ends and at at least one point intermediate the terminal ends.