Leg Protective Covering for Yard Care Tools
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Solution Overview
Problem
Existing protective coverings for hand-held grass and weed trimmers are not effective in keeping users clean and dry, do not protect shoes, and are not comfortable or lightweight, as they primarily focus on protecting against impact from flying debris rather than dirt and grime.
Innovation Solution
A lightweight, breathable, adjustable, and cleanable protective covering made of nonwoven polypropylene fabric with a V-notch at the upper end and a flared lower end, held in place by a combination of hook and loop fastener and elastic strip, providing comprehensive protection from dirt and grime for the user's legs and shoes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protective coverings are designed to protect against impact from flying debris, then protection from impact is improved, but comfort and lightness deteriorate due to weights and structural ribs
Solution Approach 1:
The patent removes weights and structural ribs from the protective covering design, extracting the harmful elements that caused discomfort and bulk while maintaining protection through the conical shape and material selection alone
Solution Approach 2:
The patent uses a lightweight flexible fabric material to create the protective covering, replacing rigid structures with a flexible thin film that provides protection without the bulk and weight of traditional designs
2Reliability
If protective coverings are designed to protect against impact from flying debris, then protection from impact is improved, but comfort deteriorates due to snug fit requirements
Solution Approach 1:
The flexible fabric material allows the covering to move with the user's leg without restricting motion, providing comfort while maintaining protection, unlike rigid structures that require snug fitting
3Stability of the object's composition
If protective coverings use weights to prevent bunching, then stability is improved, but lightness deteriorates
Solution Approach 1:
The patent completely removes weights from the design, achieving stability through the conical geometry and elastic band alone, eliminating the need for additional mass to prevent bunching
Solution Approach 2:
The conical shape of the protective covering naturally prevents bunching through its curved geometry, allowing it to drape smoothly over the leg without requiring weights to maintain stability
4Reliability
If protective coverings are designed for impact protection, then protection from flying debris is improved, but effectiveness against dirt and grime deteriorates
Solution Approach 1:
The protective covering is designed to provide multiple functions simultaneously: impact protection through the conical shape, dirt and grime protection through the fabric material and full-coverage design, and shoe protection through the extended lower portion
Solution Approach 2:
The flexible fabric material provides a barrier against dirt and grime while maintaining comfort and mobility, effectively protecting against both impact and contamination
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 solution effectively keeps users' legs and clothing clean, is comfortable to wear, and durable, while being economically manufacturable, ensuring protection from dirt, grime, and residues like poison ivy oil without the bulk of weights or structural ribs.
Implementation Method 1
The protective cover is held in place on the user's leg by a combination of hook and loop fastener (such as VELCRO) and elastic strip
Implementation Method 2
a combination of hook and loop fastener (such as VELCRO) and elastic strip attached at the protective cover's upper end
Data Source
AI summary
The present invention comprises a protective covering for keeping a user's leg clean while using power tools such as grass and weed trimmers or sprayers for various paints, stains and chemicals. The protective covering comprises a washable yet moisture resistant fabric. The V notch at the upper end allows for easily pulling the protective covering over user's pants and shoes, also leaving a slight opening for breathability. Fabric is flared at the lower end to protect user's shoes. Protective cover is held in place on the user's leg by a combination of hook and loop fastener and elastic strip attached at the upper end; this combination of hook and loop fastener and elastic strip allows protective cover to be attached above user's knee and to fit comfortably and snuggly as user moves about with the grass and weed trimmer. Preferably, the protective cover comprises a substantially conical, nonwoven polypropylene fabric.