Sprayer Reservoir Jacket Design for Fluid Accumulation

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Solution Overview

Problem

Existing coating fluid spraying devices face challenges in cleaning the reservoir end wall, leading to fluid accumulation and contamination, and require complex maintenance due to the presence of a gasket and potential fluid-induced piston movement, which complicates the removal of the piston for inspection.

Innovation Solution

A sprayer device with a reservoir featuring a jacket that forms a continuous surface with the piston and peripheral wall, eliminating interstices for fluid accumulation and eliminating the need for a gasket, along with a removal appliance that generates a pressure difference to facilitate piston extraction, such as a Venturi effect suction device or fluid injection to displace the piston.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a jacket is provided in the reservoir to improve piston sliding conditions, then the sliding conditions are improved, but interstices are created between the jacket and end wall where coating fluid accumulates

Engineering Contradiction:

Improvepiston sliding conditionsVSAvoidfluid accumulation in interstices

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The invention removes the problematic gasket element from the system. By eliminating the gasket that created interstices between the jacket and end wall, the design prevents fluid accumulation zones while maintaining piston sliding functionality through the jacket structure itself.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of adding sealing elements (gaskets) to prevent fluid leakage, the invention inverts the approach by designing the jacket and end wall to form a continuous, gap-free surface that naturally prevents fluid accumulation without requiring additional sealing components.

Inventive Principle:

Principle #13The other way round (Inversion)

2Strength

If a gasket is provided near the end wall to support the jacket, then the jacket is supported, but maintenance operations become complex requiring complete dismantling

Engineering Contradiction:

Improvejacket supportVSAvoidmaintenance complexity

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The invention extracts and eliminates the gasket component from the reservoir assembly. The jacket is redesigned to be directly supported by the end wall through a continuous surface design, removing the intermediate gasket element that complicated maintenance and disassembly operations.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention merges the support function previously performed by the gasket directly into the end wall structure. The end wall is designed to provide direct structural support to the jacket through their continuous interface, eliminating the need for separate gasket components and simplifying the overall assembly.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If coating fluid is injected into the reservoir under pressure during filling, then the reservoir is filled, but the fluid moves the piston away from the end wall and entrains the jacket, creating empty spaces for fluid accumulation

Engineering Contradiction:

Improvefilling speedVSAvoidfluid accumulation in empty spaces

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The invention removes the gasket that created the problematic empty space between the jacket and end wall. Without this gap, there is no location for fluid to accumulate when the piston moves during filling operations, even though the piston and jacket still move away from the end wall under fluid pressure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of trying to prevent piston and jacket movement during filling, the invention inverts the approach by ensuring that no empty spaces exist where fluid could accumulate, regardless of the movement that occurs during the filling process.

Inventive Principle:

Principle #13The other way round (Inversion)

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

Facilitates complete cleaning of the reservoir, simplifies maintenance, prevents fluid leakage and contamination, and allows for easy piston removal without risking damage or fluid accumulation, ensuring reliable operation and reduced maintenance complexity.

Implementation Method 1

a removal appliance that generates a pressure difference to facilitate piston extraction, such as a Venturi effect suction device

Methodology Applied

Scientific EffectVenturi effect: Venturi Effect

Implementation Method 2

fluid injection to displace the piston

Methodology Applied

Scientific EffectFluid pressure displacement: Pressure Increase

Data Source

PatentUS7931215B2Device and an installation for spraying a coating fluid, and including a reservoir

Publication Date: 2011.04.26 SAMES KREMLIN

AI summary

This device comprises a sprayer (10) and a reservoir (9) for feeding the sprayer with fluid. The reservoir (9) defines a cylindrical housing (L9) in which there slides (F1) a piston (91) forming a moving wall (91a) for a storage volume (V9) for storing the coating fluid. The housing (L9) is defined by a jacket (92) placed in a support-forming body (95). The jacket (92) has an end wall (93) co-operating with the peripheral wall (96) of the jacket (92) and with the piston (91), to define the above-mentioned storage volume (V9). No interstice are present in which the coating fluid could accumulate, thereby making the reservoir (9) easier to clean.