Trenchless Articulating Rodent Gate for Sewer Cleanouts

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Solution Overview

Problem

Existing methods for preventing rodent entry into sewer lines are inefficient, require excavation, pose safety risks, and do not effectively block rodent passage at cleanout junctions, while traditional rodenticides are toxic and inadequate.

Innovation Solution

A rodent-blocking apparatus comprising a disc-shaped gate hingedly connected to a mandible, with an arcuate beam bracing against the pipe interior, a lower guide rod, and a cup, designed to be installed in existing sewer lines without excavation, creating a one-way check valve to prevent rodent entry.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional rodent prevention devices are inserted into sewer pipes, then rodent entry is blocked, but excavation and demolition of existing construction are required

Engineering Contradiction:

Improverodent blocking effectivenessVSAvoidinstallation complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The device is divided into separate components including a gate assembly, mandrel, and installation tools that can be assembled together through the cleanout opening, eliminating the need for excavation and demolition of existing construction

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a cleanout opening as an intermediary access point that allows installation of the rodent blocking device without direct excavation, serving as a mediator between the existing sewer infrastructure and the new blocking mechanism

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If hinged grid or screens are used to block sewer lines, then rodent passage is prevented, but the devices lodge closed and block sewage

Engineering Contradiction:

Improverodent blocking effectivenessVSAvoidsewage blockage

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The gate assembly incorporates a dynamic mechanism that responds to flow conditions, remaining closed to block rodents when flow is low or stationary, and automatically opening when sewage flow occurs to prevent blockage

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The device uses flow-induced feedback where the movement of sewage water itself triggers the gate opening mechanism, creating a self-regulating system that blocks rodents while allowing necessary sewage passage

Inventive Principle:

Principle #23Feedback

3Reliability

If rodenticides are used to deal with rodent invasions, then rodents are eliminated, but toxic baits pose safety risks to children and pets

Engineering Contradiction:

Improverodent elimination effectivenessVSAvoidtoxicity to humans and pets

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the harmful approach of using toxic rodenticides into a beneficial physical barrier mechanism that prevents rodent entry without introducing toxins, transforming a harmful chemical solution into a safe mechanical one

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The device provides self-service rodent prevention by creating a permanent physical barrier that eliminates the need for ongoing toxic bait applications, making the system safe for households with children and pets while maintaining effectiveness

Inventive Principle:

Principle #25Self-service

4Reliability

If traditional rodent prevention devices are installed, then rodent entry is blocked, but the devices require placement in locations not easily accessed by property owners

Engineering Contradiction:

Improverodent blocking effectivenessVSAvoidaccessibility for maintenance

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The device is designed to be installed through existing cleanout openings that are universally present in sewer systems, making it accessible to property owners and maintenance personnel without requiring specialized installation locations or additional infrastructure

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250268243A1Trenchless, articulating rodent-blocking implement for sewer cleanouts

Publication Date: 2025.08.28 SCHUELKE DAVID

AI summary

A trenchless, rodent-blocking apparatus for creating a one-way check valve, or gate, within for a sewer cleanout operable to permit through flow of sewer down the sewer pipe but prevent rodent entry up the sewer pipe. The disclosed assembly inserts vertically into a sewer cleanout without requiring excavation or demolition.