Interlocking Gladhands Prevent Inadvertent Decoupling
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Solution Overview
Problem
Conventional air brake hose couplers lack a reliable mechanism to prevent inadvertent decoupling due to the reliance on compression of a rubber gasket, which is easily disconnected by involuntary forces like hose vibration, and existing locking mechanisms are not practical for rail industry standards.
Innovation Solution
A gladhand coupling design featuring locking lugs and flanges with ramped pads and a resilient gasket that mechanically engages to prevent unintended disconnection, allowing secure connection without additional locking mechanisms, enabling disconnection by rotating and pulling the coupling halves apart.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is added to prevent inadvertent decoupling, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking mechanism is segmented into two functional components: locking lugs that extend from one coupling half and corresponding locking grooves in the other coupling half. This segmentation allows the locking function to be distributed across simple geometric features rather than a complex integrated mechanism, resolving the contradiction between reliability and device complexity.
Solution Approach 2:
Instead of using a traditional locking mechanism that requires active engagement steps, the patent inverts the approach by using the natural coupling motion itself to engage the locking lugs into the grooves. The locking action occurs automatically during the coupling process, eliminating the need for separate locking steps while maintaining simplicity.
2Reliability
If additional locking steps or manipulation are required, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The locking lugs and grooves are pre-positioned on the coupling halves such that the locking action occurs automatically during the normal coupling rotation. This preliminary arrangement ensures that the locking function is integrated into the existing operation sequence, maintaining ease of use while achieving secure connection.
Solution Approach 2:
The coupling mechanism performs its own locking function through the automatic engagement of lugs and grooves during coupling. The system is self-servicing in that it secures itself without requiring additional manual steps or manipulation, thus maintaining ease of operation while ensuring reliable connection.
3Ease of manufacture
If conventional gasket compression is used, then ease of manufacture is improved, but reliability deteriorates due to vulnerability to vibration
Solution Approach 1:
The patent merges the sealing function (gasket compression) with the mechanical locking function (lugs and grooves) into a unified coupling system. This combination maintains the simplicity of gasket-based sealing while adding the vibration resistance of mechanical interlocking, resolving the contradiction between ease of manufacture and reliability.
Solution Approach 2:
The coupling system uses a composite approach combining different functional elements: the resilient gasket material for sealing and the rigid locking lugs/grooves for mechanical engagement. This composite structure integrates the manufacturing simplicity of rubber gaskets with the vibration resistance of metal locking features.
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 design effectively prevents inadvertent separation of air brake hose couplers while allowing for straightforward disconnection, reducing the risk of premature uncoupling and adhering to industry standards without complex locking structures.
Implementation Method 1
A resilient gasket positioned between the two opposing faces of the coupling halves will provide sufficient outward biasing forces to keep the ridges and grooves in engagement during normal use
Implementation Method 2
the first and second ramped pads are in alignment and prevent unintended or unintentional lateral forces from compressing the two halves
Data Source
AI summary
A gladhand coupling that prevents inadvertent separation of the coupling halves without the need for additional structure or manipulation to connect and disconnect the halves. Each half is equipped with a lug having a ramped pad and a flange defining a channel having a corresponding ramped pad. When two halves are positioned together then rotated into the locked position, the ramped pad of the lug is positioned proximately to the ramped pad of the flange to prevent inadvertent lateral compression of the two halves that could cause unintentional uncoupling. The coupling may be disconnected by simple rotation of one coupling half relative to the other and by pulling the coupling apart as done by current rail car decoupling procedures without the need for manual manipulation of extraneous locking mechanisms.