Disposable Painter's Chaps With Single-Strap Thigh Fastening
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Solution Overview
Problem
Existing disposable chaps are difficult to adjust and fasten, and they often leave dirty edges that can soil the pants, especially when tearing off the absorbent layers, leading to uneven protection.
Innovation Solution
The disposable chaps feature a single mid-thigh fastening strap for each thigh portion, using a non-woven medical fabric that is fluid-resistant and non-absorbent, with a contoured crotch cutout and inner-to-outer fastening direction, allowing easy securement and improved breathability, while the fabric's shape-holding properties keep the lower portions in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple spaced straps are used on thigh portions to secure chaps, then the chaps can be fastened around the legs, but the adjustment and fastening becomes difficult
Solution Approach 1:
The patent removes unnecessary straps from the design, retaining only one strap per thigh portion. This extraction of redundant components simplifies the fastening mechanism while maintaining the essential function of securing the chaps around the legs, directly resolving the contradiction between ease of operation and device complexity
Solution Approach 2:
The single strap is designed to perform multiple functions: it secures the thigh portion, allows for adjustment, and maintains the chap in place during movement. This multi-functional design eliminates the need for multiple specialized straps, achieving both simplicity and effectiveness
2Ease of operation
If absorbent face layers are used on chaps for wiping hands, then hand wiping is effective, but tearing off the layers becomes difficult and dirty edges are left that can soil pants
Solution Approach 1:
Instead of designing layers that are easy to tear (which creates dirty edges), the patent uses layers that are deliberately difficult to tear. The inverted approach prioritizes preventing dirty edges over ease of tearing, as the difficulty in tearing ensures clean separation and prevents soilage of underlying pants
Solution Approach 2:
The face layers are designed as disposable components that can be easily replaced. Rather than attempting to make them reusable or easily tearable, the design accepts their temporary nature and focuses on ensuring they provide adequate protection until replacement is necessary, eliminating the need for easy tearing
3Object-affected harmful factors
If traditional fabric materials are used for chaps, then they provide protection, but they do not breathe well and are not comfortable for extended wear
Solution Approach 1:
The patent employs composite material construction, combining different fabric types with complementary properties. The outer layer provides fluid resistance while the inner layer provides breathability and comfort, creating a multi-functional material system that simultaneously achieves protection and ventilation
Solution Approach 2:
Different portions of the chap are constructed from materials with different properties optimized for their specific functions. The areas requiring fluid resistance use appropriate barrier materials, while areas requiring breathability use ventilating fabrics, creating local optimization throughout the garment
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 provides easy adjustment and secure fitting, enhanced breathability, and effective protection for the pants, with the fabric attracting and retaining painter's fluids without absorbing them, ensuring clean pants throughout use.
Implementation Method 1
The fabric material is fluid-resistant, but is believed to be essentially non-absorbent due to the undesirability of absorbing and trapping bodily fluids on disposable medical clothing
Implementation Method 2
the properties of this material seem to attract or draw and remove painter's fluids such as paint and caulk from the hands, better than an absorbent material would, and to hold them on the fabric
Implementation Method 3
Each thigh-covering portion also includes a fastening strap (or equivalent wraparound flexible connector such as a cord) at a single mid-thigh location adjacent the lower end of a contoured crotch cutout to extend around the back of the leg between the sides of the thigh portion, to secure the thigh portion snugly across the front and preferably partway around the sides of the thigh at the mid-thigh location adjacent the crotch
Implementation Method 4
the preferred material in a single layer sheet configuration is extremely lightweight and breathable, yet seems to hold its shape with a 'memory' effect relative to the wearer's thighs that helps conform the thigh portions of the chaps to the wearer's pants while working
Data Source
AI summary
Disposable chaps with wiping faces on the thighs. A single mid-thigh strap closer to a contoured crotch cutout than to a lower hem is used for securing the thigh portions of the chaps around the upper legs, and a novel non-absorbent, shape-holding medical barrier material is used to both improve the removal of paint, caulk, etc. from the hands, and also to help conform the unsecured lower end portions and free hems of the thigh portions to the wearer's pants while working.