Dispenser Guard for Spray Paint Marking Wand

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Solution Overview

Problem

Existing spray paint marking systems lack a secure mechanism to ensure the paint dispenser is properly aligned and locked in place, leading to accidental discharge of paint when handling the canister.

Innovation Solution

A marking wand with a paint canister and dispenser guard that includes a dispenser-locator shoulder to securely position the paint canister within the frame, preventing accidental discharge by limiting access to the dispenser and ensuring it remains aligned during use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the paint canister is held by the dispenser guard for easy handling, then ease of operation is improved, but the dispenser becomes accessible and may be accidentally moved causing unintended paint discharge

Engineering Contradiction:

Improvehandling of paint canisterVSAvoidprevention of accidental paint discharge

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The dispenser guard acts as an intermediary component between the user's hand and the dispenser. It provides a gripping surface for easy handling while simultaneously serving as a protective barrier that limits direct access to the dispenser, thus preventing accidental activation while maintaining ease of operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the dispenser is made accessible for actuation, then ease of operation is improved, but the risk of accidental discharge increases

Engineering Contradiction:

Improveactuation of dispenserVSAvoidaccidental paint discharge

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The dispenser guard applies local quality by providing different accessibility levels to different parts of the paint canister. The grip portion is fully accessible for handling, while the dispenser area is partially protected. This localized differentiation allows easy operation where needed while preventing accidental discharge where harmful.

Inventive Principle:

Principle #3Local quality

3Reliability

If the paint canister is secured in the chamber to prevent movement, then reliability is improved, but the complexity of the securing mechanism increases

Engineering Contradiction:

Improvepositioning of paint canisterVSAvoidsecuring mechanism

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The dispenser guard incorporates self-service features including self-alignment and self-location capabilities. The guard automatically positions itself and the paint canister within the chamber through its geometric design, eliminating the need for complex external securing mechanisms while ensuring reliable positioning.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS9527655B2Spray paint marking system with locating dispenser guard

Publication Date: 2016.12.27 BERRY PLASTICS CORP

AI summary

A marking wand includes a paint canister and a frame that receives the paint canister. The paint canister loads into a chamber provided at the bottom of the frame so that a dispenser of the paint canister faces downwardly toward the ground. Once the paint canister is loaded in the frame, a user can hold a handle at the top of the frame and pull a trigger included in the handle to actuate the dispenser by pushing the dispenser in a predetermined location thereby discharging paint from the paint canister and marking the ground.