Fish Landing Net Non-Circular Receiver and Teflon Bushing Design

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Solution Overview

Problem

Existing fishing nets face issues with handles binding, limited load capacity due to complex and costly connections, and excessive parts, which hinder easy sliding and structural integrity.

Innovation Solution

A fish landing net design featuring non-circular receivers attached to locking rings for enhanced strength and fewer parts, with a sliding handle mechanism that includes a connecting member with locking rings and receivers to ensure easy sliding and secure attachment, eliminating the need for rivets and reducing part count.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If an aluminum handle and aluminum connecting member are used, then the net is lightweight, but the handle binds and does not slide easily

Engineering Contradiction:

Improveweight of netVSAvoidsliding ease of handle

Core Design Contradiction:

Weight of moving objectVSEase of operation

Solution Approach 1:

A Teflon® bushing is introduced as an intermediary component between the aluminum handle and aluminum connecting member. The bushing has a tapered inner surface that receives the handle, and Teflon® material provides low friction characteristics enabling smooth sliding while maintaining the lightweight aluminum construction of both the handle and connecting member.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If many parts are used to join the net frame to the connecting member, then the connection is strong, but the manufacturing cost increases and load capacity is limited

Engineering Contradiction:

Improveconnection strengthVSAvoidnumber of parts

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The net frame members are directly received by the connecting member through receivers formed on the connecting member body. This merging of functions eliminates the need for separate joining parts such as rivets, bolts, or welds, reducing the total number of parts while maintaining connection strength. The single-piece connecting member design simplifies manufacturing and reduces cost.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If a single-piece connecting member is used, then manufacturing is simpler and cost is reduced, but load capacity must be increased

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidload capacity

Core Design Contradiction:

Ease of manufactureVSStrength

Solution Approach 1:

The connecting member is designed with distinct functional segments: receivers for net frame attachment, a Teflon® bushing for handle sliding, and an overall structural body. This segmentation of functions within a single piece allows each feature to be optimized independently while maintaining manufacturing simplicity and adequate load capacity.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS8806801B2Fish landing net

Publication Date: 2014.08.19 STEFFENS DAVID A

AI summary

A landing net having a net member attached to a connecting member that is attached to a handle. The connecting member has at least two locking rings and a receiver attached to each locking ring. Each locking ring has a bushing attached to an inner surface of the ring. The receivers have a non-circular shape and extend parallel to a central axis of the rings.