Segmented Dog Chew with Grooved Shaft for Controlled Fracture
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Solution Overview
Problem
Existing dog chews, such as the Greenies brand, do not effectively manage the chewing process to prevent large pieces from breaking off, which can be dangerous if swallowed, and do not adequately accommodate a dog's tooth shape for optimal dental hygiene.
Innovation Solution
A dog chew with a brush-shaped head featuring angled bristle segments and a bone-shaped tail, where the tail is connected by a shaft with a groove, designed to increase contact with the dog's teeth and create predetermined fracture lines for easier breaking, thus enhancing safety and dental cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid block chew design is used, then the chew maintains structural integrity, but large pieces break off when bitten which is dangerous if swallowed
Solution Approach 1:
The chew is divided into multiple segments along its length, creating predetermined fracture lines that guide breaking into smaller, safer pieces. The segmentation allows the chew to break in controlled ways rather than producing large dangerous fragments, while the overall segmented structure maintains sufficient integrity for durability.
2Ease of manufacture
If a smooth surface chew is used, then the chew is easy to manufacture, but it does not effectively clean dog teeth
Solution Approach 1:
The chew surface incorporates localized textured regions with raised patterns and ridges that correspond to tooth surfaces. These localized textured areas provide effective dental cleaning through mechanical abrasion during chewing, while the rest of the chew maintains a smoother surface for ease of manufacture and consumption.
3Ease of manufacture
If a uniform cross-section chew is used, then the chew is simple to produce, but it does not accommodate the natural shape of a dog's tooth
Solution Approach 1:
The chew features an asymmetric cross-sectional profile with convex and concave surfaces that match the natural asymmetry of dog tooth geometry. This asymmetric design allows the chew to conform to tooth contours during chewing, improving dental contact and cleaning effectiveness, while still being producible using standard extrusion or molding processes.
4Duration of action of moving object
If a long continuous chew is used, then the chew provides extended chewing time, but it increases the risk of large piece breakage
Solution Approach 1:
The long chew is divided into multiple segments with varying cross-sections along its length, creating predetermined fracture lines that guide breaking into smaller pieces. This segmentation extends the chewing duration by providing multiple breakable sections while reducing the risk of large dangerous fragments through controlled fracture paths.
Solution Approach 2:
The chew incorporates predetermined fracture lines and weakened zones created during manufacturing, which prepare specific locations for controlled breaking. This preliminary action ensures that when the chew breaks, it follows predetermined paths into smaller safe pieces rather than randomly breaking into large dangerous fragments.
Data Source
Figure 1A~1C
Figure 2A~2B
AI summary
A dog chew made of extruded, edible material has a brush-shaped head at one end and a tail at the other. The brush-shaped head and tail are connected to the head by a shaft. The brush-shaped head is provided with segments (for example six segments) with spaces between the segments adapted to be more easily manipulated in a dog's mouth, so that smaller pieces break off when a dog bites and chews the article. Thus, the brush-shaped head may contain individual segments having an elliptical cross section, so that a dog's tooth can work between the individual segments or "bristles." Elsewhere on the profile of the dog chew, stepped surfaces are avoided in favor of smooth, rounded surfaces, so that the dog chew is more easily handled in the dog's mouth and has an aesthetically pleasing appearance.