Valve Assembly with Nested Indicator Buttons for Trailer Brake
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Solution Overview
Problem
Current park-release valve assemblies for trailer vehicles with spring-loaded brakes lack a compact design and clear visual differentiation between operational positions, making it difficult to identify the switching state and potentially leading to unintentional actuation.
Innovation Solution
A valve assembly with a display button adjacent to the actuating button, where the control rod's position is indicated by different protrusions and colors, ensuring easy identification of the parking and release positions, and incorporating a locking mechanism to prevent accidental movement to the release position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a compact valve assembly design is implemented, then the device complexity is reduced and space is saved, but the visual differentiation between operational positions becomes less clear
Solution Approach 1:
The display button is integrated into the actuating button assembly, with the control rod positioned within the housing structure. This nesting arrangement allows multiple functional elements (control rod, display button, actuating button) to occupy overlapping spatial volumes, achieving a compact overall form factor while maintaining distinct visual indicators for different operational states through the protruding control rod and colored markings
Solution Approach 2:
Different colored markings (black for shunting position, red for parking position) are applied to the valve assembly components to provide clear visual differentiation between operational states. This color-coding system allows the compact design to maintain excellent state visibility by using color as an information carrier that does not require additional spatial volume
2Loss of information
If the control rod protrudes significantly to indicate position, then the switching state is easily identifiable, but the risk of unintentional actuation increases
Solution Approach 1:
The control rod is designed with dynamic positioning characteristics - it protrudes to indicate position but requires deliberate manipulation (rotation or pressing of the actuating button) to change state. The sliding sleeve mechanism provides controlled movement with defined positions, creating a dynamic system that balances visibility with protection against accidental actuation through its mechanical design
Solution Approach 2:
The actuating button with its colored markings serves as a preliminary indicator that alerts the operator to the current state before any actuation occurs. This preliminary visual warning allows the operator to consciously decide whether to proceed with actuation, preventing unintentional changes in valve state by providing advance notice of the current operational condition
3Adaptability or versatility
If separate valve units are used for different functions, then each function can be optimized independently, but the overall device size and complexity increase
Solution Approach 1:
The patent combines multiple valve functions (parking brake release, position indication, state display) into a single integrated valve assembly. The control rod serves both as a position indicator and as the actuating mechanism, while the display button provides visual feedback. This merging of functions into one compact unit reduces the number of separate components while maintaining functional optimization through careful design of the integrated system
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 provides a compact and user-friendly valve assembly that clearly indicates operational states, preventing unintentional actuation and ensuring secure operation by utilizing distinct visual cues and mechanical locking features.
Implementation Method 1
a spring-loaded brake cylinder (48) which can be acted upon by a spring force (Fs) in a defined direction
Implementation Method 2
aerates the spring-loaded brake cylinders with compressed air from the reservoir (of the trailer vehicle) and thus releases the spring-loaded brakes
Data Source
Figure 1~3
Figure 4~6
Figure 7
AI summary
The invention relates to a valve assembly as a park-release valve (20) for a trailer vehicle with spring-type brake, having a control rod (21) which is axially movable in a housing (22) and which, at one end and outside the housing, is equipped with an actuating button (25). According to the invention, an indicator button (30) is provided adjacent to the actuating button (25), which indicator button, - in a park position of the control rod (21), projects out of the housing (22) to a lesser extent than the actuating button (25), and - in a release position, projects out of the housing (22) to a greater extent than the actuating button (25).