Trigger Sprayer Lever and Piston Design for Sustained Fluid Dispensing
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Solution Overview
Problem
Conventional trigger sprayers deliver limited amounts of fluid per stroke, requiring multiple actuations for larger surfaces or applications, leading to a suboptimal user experience.
Innovation Solution
A trigger sprayer design featuring an extended trigger lever, larger diameter piston bore and piston, and a force-to-actuate between 10-15 pounds, allowing for a sustained duration spray of 3-5 mL per stroke, with a grip distance of 3.3 inches and displacement of 0.5 inches, enabling a longer spray duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional trigger sprayer design is used, then device simplicity is maintained, but fluid output per stroke is limited to 1.0 cc or less
Solution Approach 1:
The patent changes key parameters of the trigger sprayer: extending the trigger lever length, increasing piston bore diameter, and increasing piston diameter. These parameter changes enable the system to dispense 3-5 mL per stroke (300-500% increase) while maintaining the basic trigger sprayer mechanism and structure.
2Duration of action of moving object
If conventional trigger sprayer with short lever is used, then ease of operation is maintained, but spray duration is limited to less than 1 second
Solution Approach 1:
The patent creates a dynamic balance by extending the trigger lever to increase spray duration (achieving 3-5 seconds of continuous spray) while optimizing the piston bore and piston size to maintain actuation force within 10-15 pounds, keeping the device easy to operate despite the extended duration capability.
3Quantity of substance
If multiple strokes are used to increase product delivery, then total product output increases, but user experience deteriorates due to repeated actuation
Solution Approach 1:
The patent enables continuous spray action for 3-5 seconds per trigger actuation by increasing the piston bore diameter and piston diameter, allowing users to cover large surface areas with fewer continuous strokes rather than multiple short interruptions, thereby improving user experience while delivering 3-5 mL per actuation.
4Duration of action of moving object
If trigger lever is extended to increase spray duration, then spray time increases to 3-5 seconds, but force to actuate increases to 10-15 pounds
Solution Approach 1:
The patent balances multiple parameter changes: extending the trigger lever increases spray duration to 3-5 seconds, but simultaneously increases the piston bore diameter and piston diameter to reduce pressure requirements, resulting in an optimal actuation force of 10-15 pounds that is still easy to operate.
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 enhanced design allows for a more efficient and comfortable dispensing of 3-5 mL of fluid over a three-second period, improving user experience by reducing the need for multiple actuations and providing a larger output per stroke.
Implementation Method 1
A spring may be in communication with the trigger lever, the piston, or both to encourage return of the trigger lever to a non-actuated position upon a release or reduction of force on the trigger lever.
Data Source
AI summary
A sustained duration trigger sprayer capable of dispensing at least 3 mL of product over a time period of about 3 seconds utilizing a force-to-actuate of between about 10 pounds and about 15 pounds. The trigger sprayer includes an enlarged piston bore and piston and an elongated trigger lever creating a high output fluid displacement with a 0.5 inch displacement distance. The container bottle and/or the sprayer shroud are contoured to provide a gripping area opposing the terminal end of the trigger lever wherein the gripping distance in from the gripping area to the terminal end of the trigger lever is no greater than 3.3 inches.