One-Piece Bridge Tie Clip for Load Distribution
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Solution Overview
Problem
Existing methods for securing railroad ties to bridge supports are complex, requiring multiple component parts and dangerous installation processes, which increase time, cost, and risk for workers, and can lead to load concentration and overload due to tight connections.
Innovation Solution
A one-piece clip made of a unitary metal rod with a vertical leg, horizontal leg, and resilient hook-shaped portion that secures railroad ties to bridge supports without additional parts, allowing for installation from above the bridge deck and providing a looser connection to distribute train loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple component parts and extensive training are used for existing attachment methods, then the ties and rails can be held in place and loads supported, but the installation process becomes complex, time-consuming, and dangerous for workers
Solution Approach 1:
The patent combines multiple separate attachment components into a single integrated clip assembly that includes a U-shaped body, resilient arms, and securing mechanisms all as one unit. This eliminates the need for multiple separate parts while maintaining the ability to securely hold ties and rails in place, directly resolving the contradiction between reliability and device complexity
Solution Approach 2:
The clip assembly is designed to perform multiple functions simultaneously: it secures ties to rails, provides resilient tensioning, and maintains proper spacing and alignment. This multi-functional design reduces the overall system complexity while ensuring reliable attachment, addressing both the reliability requirement and the complexity reduction goal
2Reliability
If existing attachment methods are used, then the ties can be secured to bridge supports, but the installation requires dangerous work both above and beneath the bridge deck
Solution Approach 1:
The clip assembly is designed to be installed from the top side of the bridge deck only, inverting the traditional installation approach that required workers to position themselves both above and beneath the deck. The resilient arms and expanding securing mechanisms are configured to engage and lock into place from a single-sided installation, eliminating the need for dangerous beneath-deck work while maintaining secure attachment
3Strength
If tight connections are used to secure ties, then the attachment strength is increased, but load concentration and overload occur
Solution Approach 1:
The clip assembly incorporates resilient arms that provide dynamic, flexible connection rather than rigid tight fastening. These resilient components allow controlled movement and distribution of forces, preventing load concentration at single points while maintaining sufficient attachment strength to secure ties under varying train loads
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 one-piece clip simplifies the installation process, reduces worker risk, and helps distribute train loads across the railway structure, enhancing safety and stability by eliminating the need for multiple components and allowing for secure, yet flexible, tie attachments.
Implementation Method 1
a resilient hook-shaped portion (500) having a hook point (550). The clip (100) is biased toward a seated position, with the hook point (550) positioned beneath part of the support (10)
Data Source
AI summary
Systems, devices, and methods are presented for securing a railroad tie atop a support. In one implementation, a unitary length of metal rod is made into a clip that includes a vertical leg, a horizontal leg, and a resilient hook-shaped portion having a hook point. The hook-shaped portion is made so that the clip is biased toward a seated position, with the hook point positioned beneath part of the support. During installation, the vertical leg is placed through a hole in the railroad tie, driven downward until the resilient hook-shaped portion collapses into a compressed position, and driven further until the hook point moves beyond a free edge of the support and expands into the seated position. The clip secures the railroad tie without any additional parts and without requiring a worker to labor beneath the support.