Injection Bayonet Purging for Spill-Free Foundation Wrap Replenishment

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Solution Overview

Problem

Existing chemical preservative application systems for embedded foundations, such as wooden telegraph poles, suffer from spillage issues that pose safety hazards due to the toxicity of the chemicals involved.

Innovation Solution

An injection apparatus with a lumen and preservative outlet nozzles, connected to a portable tank via a flexible hose and a syringe, allows for controlled application and purging of residual preservative to prevent spillage, featuring a shut-off valve and plunger mechanism to manage fluid flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If chemical preservatives are applied to embedded foundations using conventional systems, then preservation effectiveness is achieved, but spillage occurs creating safety hazards

Engineering Contradiction:

Improvepreservation effectivenessVSAvoidspillage safety hazard

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The harmful residual preservative is extracted from the injection bayonet lumen through the purging mechanism. The syringe withdraws residual preservative from the lumen, separating it from the application path and preventing it from reaching the operator, thus eliminating the spillage hazard while maintaining preservation effectiveness.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The purging action is performed as a preliminary step before removing the injection bayonet from the preservation wrap. By clearing the lumen of residual preservative beforehand, the system prevents potential spillage that would occur during bayonet removal or handling, thereby eliminating safety hazards while preserving the applied preservative.

Inventive Principle:

Principle #10Preliminary action

2Loss of substance

If residual preservative remains in the injection bayonet after replenishment, then complete preservative transfer is achieved, but spillage risk increases

Engineering Contradiction:

Improvepreservative transfer efficiencyVSAvoidspillage risk

Core Design Contradiction:

Loss of substanceVSObject-affected harmful factors

Solution Approach 1:

The system changes the pressure parameter within the lumen by using the syringe plunger to create negative pressure during purging. This pressure change draws residual preservative out of the lumen and into the syringe, efficiently removing remaining preservative without causing uncontrolled spillage, thus balancing transfer efficiency with safety.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If the injection bayonet is used for replenishment, then preservation wrap is effectively replenished, but residual preservative remains causing potential contact with operator

Engineering Contradiction:

Improvereplenishment effectivenessVSAvoidoperator safety

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The injection bayonet performs self-cleaning through the purging mechanism. After replenishing the preservation wrap, the syringe automatically withdraws residual preservative from the bayonet lumen, enabling the device to service itself by eliminating its own hazardous residue without requiring additional manual cleaning operations, thus maintaining both productivity and operator safety.

Inventive Principle:

Principle #25Self-service

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

The apparatus effectively prevents preservative spillage during and after replenishment, ensuring safe handling and reducing contact with the operator by purging residual preservative from the lumen.

Implementation Method 1

the lumen is purged by depressing a plunger of the syringe to purge residual preservative from the lumen of the injection bayonet

Methodology Applied

Scientific EffectPressure gradient: Pressure Gradient

Implementation Method 2

the piston plunger may be positionable at the preservative inlet to block fluid flow passage between the preservative inlet and the lumen

Methodology Applied

Scientific EffectPhysical barrier: Physical Containment

Data Source

PatentUS12350707B2Purgeable injection apparatus for spill-free replenishment of embedded foundation preservation wraps

Publication Date: 2025.07.08 COPPER CARE WOOD PRESERVATIVES INC

AI summary

The present injection apparatus is designed for replenishing embedded foundation preservation wraps with preservative whilst avoiding spillage. The injection apparatus comprises an injection bayonet having a lumen fluidly interfacing a plurality of preservative outlet nozzles along the injection bayonet and a preservative inlet fluidly interfacing the lumen. A portable preservative containing tank may be attached to the inlet via a flexible hose. The apparatus further comprises a syringe operating between the preservative inlet and the lumen. When replenishing the preservation wrap, the injection bayonet is inserted between the preservation wrap and the foundation so that preservative is configured to be supplied via the preservative inlet to flow out from the nozzles via the lumen to replenish the preservation wrap with the preservative. After replenishment, the lumen is purged of residual preservative using the syringe.