Rodent Trap Trapdoor Storage for Continuous Corpse Disposal

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Rodent traps often require manual removal of caught rodents, which reduces their efficiency and can lead to hygiene and odor issues due to decomposition.

Innovation Solution

A rodent trap with a trapdoor positioned to the side of the kill mechanism, allowing the rodent corpse to pass into a storage area after being killed, and a shroud to maintain the rodent's head position for effective killing, combined with a self-resetting mechanism to enable continuous trapping without manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If rodent traps are checked only periodically, then manual removal of rodent corpses is reduced, but trapping efficiency decreases and hygiene issues arise

Engineering Contradiction:
Improvetrapping efficiencyVSAvoidmanual removal requirement
Core Design Contradiction:
ProductivityVSEase of operation

Solution Approach 1:

The trapdoor mechanism automatically opens to discharge rodent corpses into the storage area without requiring manual intervention. The system serves itself by using the rodent's own weight and the trapdoor's gravitational bias to achieve automatic disposal, eliminating the need for operators to manually remove corpses.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The trap is divided into functionally independent sections: the kill mechanism area, the trapdoor discharge path, and the storage area. This segmentation allows the trap to maintain multiple functions simultaneously - killing rodents, automatically discharging corpses, and storing them - thereby improving productivity without increasing manual operation requirements.

Inventive Principle:
Principle #1Segmentation

2Ease of operation

If rodent corpses remain in the trap for long periods, then manual removal is minimized, but decomposition causes hygiene and odor issues

Engineering Contradiction:
Improvemanual handling reductionVSAvoiddecomposition and odor
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The rodent corpse is extracted from the kill mechanism area through the trapdoor and transferred to a separate storage area. This extraction prevents the corpse from remaining in the trap where it would decompose and cause hygiene issues, while still minimizing manual handling by using automated discharge.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The storage area acts as an intermediary between the kill mechanism and the external environment. It temporarily holds the rodent corpse in a controlled environment, preventing direct contact with the trap mechanism and the external environment, thereby reducing decomposition and odor problems while maintaining automated operation.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Productivity

If a trapdoor is added to automatically discharge rodent corpses, then trapping continuity is improved, but device complexity increases

Engineering Contradiction:
Improvetrapping continuityVSAvoidtrapdoor mechanism
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The trapdoor is designed to be biased by gravity, creating a simple potential difference system where the door naturally opens downward toward the storage area. This gravitational bias eliminates the need for complex motors or actuators, achieving automatic discharge while minimizing added complexity.

Inventive Principle:
Principle #12Equipotentiality

Solution Approach 2:

The trapdoor mechanism is designed to be self-actuating through the rodent's weight and gravitational force. The system uses the rodent's own mass to trigger the door opening and discharge the corpse, eliminating the need for external power sources or complex control systems.

Inventive Principle:
Principle #25Self-service

4Reliability

If a shroud is used to maintain rodent head position for killing, then killing effectiveness is improved, but device complexity increases

Engineering Contradiction:
Improvekilling effectivenessVSAvoidshroud structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The shroud is a localized structural element positioned only in the specific area where the rodent's head enters the kill mechanism. This local quality approach provides the necessary head position control for effective killing without requiring complex mechanisms throughout the entire trap structure.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The shroud appears to be a simple, possibly disposable structural component that provides temporary guidance for the rodent's head during the killing process. Its simple design minimizes complexity while achieving the reliability of effective killing through proper head positioning.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

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

Enables continuous trapping and containment of rodent corpses, reducing manual handling and minimizing hygiene and odor issues through automated disposal and preservation.

Implementation Method 1

The trapdoor is biased only by gravity. This allows the use of springs in the rodent trap to be avoided, so that it does not fall with 'spring trap' legislation.

Methodology Applied
Scientific EffectGravity: Gravitation

Implementation Method 2

The kill mechanism comprises an impactor to strike the rodent to kill it... the rodent is killed by neck shear

Methodology Applied
Scientific EffectImpact force: Impact Force

Data Source

PatentEP4033896B1Rodent traps
Publication Date: 2026.04.22 RENTOKIL INITIAL 1927 PLC
  • EP4033896B1 patent drawingFigure 1a
  • EP4033896B1 patent drawingFigure 1b
  • EP4033896B1 patent drawingFigure 2

AI summary

A rodent trap comprising a trigger arranged to be triggered by a rodent, a kill mechanism arranged to kill a rodent in response to the trigger being triggered by the rodent, a trapdoor positioned adjacent to the kill mechanism, having a closed position and an open position, and a storage area positioned on the other side of the trapdoor to the kill mechanism. The rodent trap is arranged such that when a rodent is killed by the kill mechanism, the rodent corpse passes through the trapdoor into the storage area.