Spray Extension Device Flexible Tension Transmission
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Solution Overview
Problem
Existing extension devices for spray guns are cumbersome, expensive, and prone to material loss due to complex designs and rigid material needles, limiting their length and usability, especially in angled applications where material can unintentionally escape through open nozzles.
Innovation Solution
A flexible tension transmission element replaces the conventional rigid material needle, allowing for a simpler, lighter extension device with a dosing and shut-off valve that uses material pressure to open and close, reducing material loss and enabling longer, curved designs without additional actuation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rigid material needle is used to control the material outlet nozzle, then the spray gun can be actuated mechanically, but the extension device becomes heavy and cannot be made several meters long
Solution Approach 1:
The patent replaces the rigid mechanical material needle with a flexible alternative that can be actuated by compressed air or other non-mechanical means, allowing the extension device to be made lighter and longer without sacrificing control capability
Solution Approach 2:
The patent introduces a flexible element (such as a flexible membrane or thin-walled structure) that can transmit actuation forces over long distances while maintaining light weight, enabling extension devices to reach several meters in length
2Length of moving object
If the extension device is made several meters long, then it can reach distant or angled workpieces, but the rigid material needle bends and requires additional support
Solution Approach 1:
The patent uses flexible materials and thin-walled structures that can bend and flex without breaking, allowing the extension device to achieve several meters in length while maintaining structural integrity and eliminating the need for additional support elements
Solution Approach 2:
The patent transitions from a static, rigid material needle to a dynamic, flexible alternative that can adapt its shape to reach angled or distant workpieces while maintaining control, enabling the extension device to be both long and stable
3Stability of the object's composition
If additional support elements are added to the extension tube, then the material needle stability is improved, but the weight and manufacturing costs increase
Solution Approach 1:
The patent employs flexible membranes or thin-walled structures that provide the necessary stability and support inherently, eliminating the need for additional heavy support elements and reducing manufacturing complexity and costs
4Length of moving object
If a rigid material needle is used in angled extension devices, then it can guide material to the nozzle, but material remains in the extension tube volume and can escape unintentionally
Solution Approach 1:
The patent uses a flexible membrane or thin-walled structure that can conform to angled configurations while maintaining a sealed pathway, preventing material from remaining in dead volumes and escaping unintentionally, thus reducing material loss
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 solution minimizes material loss, reduces production costs, and allows for longer, more versatile extension devices that can handle various geometries and workpieces efficiently, with the flexible tension transmission element ensuring effective force transmission regardless of the extension unit's shape.
Implementation Method 1
a tension transmission element (28) to which the valve body (26) is attached, which extends through the valve opening (24) and consists of a flexible material
Implementation Method 2
with which the valve body (26) can be pulled back into the closed position against the action of the material pressure
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
The invention relates to an extension device (10) for spraying devices (1), comprising an extension unit (12), which has, at a first end (14), a spraying head (40) having at least one material outlet nozzle (42) and, at a second end (16), means for connecting a spraying device (1). The extension device (10) is characterized in that the extension unit (12) has a metering and shut-off valve (20), which has a valve seat element (22) having a valve opening (24) and which has a valve body (26), that the valve body (26) is arranged between the spraying head (40) and the valve seat element (22), and that the valve body (26) is fastened to a tension-transmitting element (28), which extends through the valve opening (24). The invention further relates to a spraying device (1) for spraying spraying material onto surfaces, said spraying device comprising such an extension device (10).