Inherently Thin Single Width Chain Link Design
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Solution Overview
Problem
Conventional chain saws require additional mechanical connections like rivets or pins for the cutting chain, which increases material usage and necessitate lubrication, and the chain tension needs adjustment as it wears or stretches.
Innovation Solution
A cutting chain with links connected by inherent features such as hooks and round features that pivot without disarticulation, housed in a channel to prevent lateral dislocation and guide the chain, reducing material usage and eliminating the need for separate connections and lubrication, with a power train and drive train system for optimized performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate mechanical connections (rivets, pins) are used to connect cutting chain links, then the chain can pivot without disarticulating, but the amount of material needed increases and lubrication becomes necessary
Solution Approach 1:
The patent merges the connection features directly into the link structure itself. Each link includes integrated connection features (such as protrusions, recesses, or interlocking geometries) that eliminate the need for separate rivets or pins. This integration reduces material usage while maintaining the reliability of the chain connection, as the connection is inherent to the link design rather than added components.
Solution Approach 2:
The patent extracts and eliminates the separate connection elements (rivets, pins) from the chain structure. By removing these additional components and incorporating their function directly into the link geometry, the design reduces material quantity while preserving the essential pivoting and connection functions of the chain.
2Reliability
If separate mechanical connections (rivets, pins) are used to connect cutting chain links, then the chain can pivot without disarticulating, but lubrication becomes necessary
Solution Approach 1:
The connection features are merged into the link structure, creating an integrated design where the connection interface is part of the link itself. This integration eliminates the need for separate lubrication systems, as the connection relies on inherent geometric interlocking rather than friction-based mechanical connections that require lubrication.
3Force
If conventional cutting chains are used, then the chain can be tensioned to bear force, but the chain needs tension adjustment as it wears and stretches
Solution Approach 1:
The patent employs parameter changes in the link geometry and connection features to reduce wear and stretching. By optimizing the geometric parameters of the connection interfaces (such as contact surfaces, interlocking features, and distribution of loads), the chain maintains its tension characteristics for longer periods, reducing the frequency of adjustment needed while preserving force bearing capacity.
Data Source
AI summary
An invention is disclosed comprising a cutting chain of links that pivot without longitudinal disarticulation, yet are connected without reliance on separate connections. Lateral dislocation of the links of the cutting chain is prevented by placement of the cutting chain in a channel, which guides the cutting chain along its operational path and provides resistance against normal load. The channel may be retractable and/or comprised of lubricious, heat absorbing materials. The blade may be flexible in order to cut a variable kerf. The invention further comprises a power train and drive train, designed to optimize the cutting chain for one of many applications.