Composite Railroad Brake Stick with Interlocking Head
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Solution Overview
Problem
Existing railroad brake sticks are heavy and difficult to use due to their metal construction, making them cumbersome and unsafe in environments where sparking must be avoided, such as mines and oil refineries.
Innovation Solution
A lightweight railroad brake stick made from composite materials like para-aramid synthetic fibers, graphene, and carbon fibers, with a non-metallic design that includes a head and cross-support interlocking mechanism and a handle sleeve, eliminating exposed metallic components and incorporating magnets for secure attachment to metal surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heavy metal materials are used for railroad brake sticks, then strength and durability are improved, but weight increases making them difficult to use
Solution Approach 1:
The patent applies composite materials by combining para-aramid synthetic fibers (providing tensile strength and impact resistance) with carbon fiber materials (providing compressive strength and stiffness). This composite construction achieves the required mechanical strength for railroad brake stick applications while significantly reducing weight compared to traditional solid metal construction. The layered composite structure allows optimization of material properties in different directions to match the stress patterns experienced during brake operations.
2Duration of action of stationary object
If heavy metal materials are used for railroad brake sticks, then durability is improved, but ease of operation deteriorates due to significant weight
Solution Approach 1:
The composite material construction provides durability through the inherent properties of para-aramid fibers (high tensile strength, heat resistance) and carbon fiber (stiffness, fatigue resistance), while the reduced weight (less than 3 lbs) dramatically improves ease of operation, allowing railroaders to easily handle, position, and manipulate the brake stick during operations without excessive physical effort.
3Object-affected harmful factors
If non-metallic composite materials are used, then safety in hazardous environments is improved by eliminating sparking, but manufacturing complexity increases
Solution Approach 1:
The use of non-metallic composite materials (para-aramid and carbon fiber) completely eliminates the sparking hazard by removing all metallic components from the brake stick structure, making it safe for use in hazardous environments such as areas with flammable gases or dust. The manufacturing process, while requiring specialized composite fabrication techniques, is streamlined through automated fiber placement and curing cycles, and the benefits of eliminating metal detection, sparking concerns, and corrosion protection requirements offset the initial manufacturing complexity.
Data Source
AI summary
A railroad brake stick can include: a head having a planar shape with a recesses and/or protrusions on one or more side surfaces of the planar shape, the planar shape having a head interlocking groove on a hilt region; a cross-support having a planar shape with a support interlocking groove interlocked with the head interlocking groove such that the planar shape of the head crosses with the planar shape of the cross-support to form an interlocking region; and a handle coupled to the head and cross-support such that the interlocking region is within an end of the handle. In some aspects, a cover is over the handle. n some aspects, the head is a composite material and the cross-support is a composite material and the handle is a composite material.