Rubber Vibration Isolation Assembly for Rooftop Lumber Mounts
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Solution Overview
Problem
Existing vibration isolation devices for rooftop equipment lack specificity for mounting dimensional lumber, failing to effectively manage varying weight capacities and isolate vibrations efficiently.
Innovation Solution
A two-piece vibration isolation assembly comprising a support member and an isolator member made of rubber with different durometers, allowing for adjustable weight support and vibration damping without a hard connection, using a molded rubber design with a universal support and isolator configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed cast iron carrier assembly with different spring capacities is used, then the device can match different equipment weights, but the device complexity increases and requires multiple components
Solution Approach 1:
The patent applies parameter changes by varying the durometer (hardness) of the rubber isolator material to match different equipment weights. Instead of using different spring capacities in a complex assembly, the invention uses a single rubber isolator with specific durometer values (e.g., 60 durometer for lighter equipment, 70 durometer for heavier equipment) to achieve the same weight-matching function, thereby simplifying the overall device structure while maintaining adaptability.
2Stability of the object's composition
If downward pressure is used to keep the device in position, then the isolator remains stable, but the device requires additional fastening mechanisms and increases complexity
Solution Approach 1:
The patent applies self-service by designing the rubber isolator to automatically generate downward pressure through its own weight and elastic deformation. The isolator compresses under the weight of the equipment it supports, creating a self-generating downward force that secures it to the lumber without requiring external fastening mechanisms. This self-service mechanism maintains position stability while eliminating the need for additional fastening components.
3Ease of manufacture
If a universal rubber device is used, then the device is easier to manufacture and install, but it cannot effectively isolate vibrations for specific mounting points on dimensional lumber
Solution Approach 1:
The patent applies local quality by designing the rubber isolator with specific geometric features tailored for dimensional lumber mounting points. The isolator includes a top surface with a specific shape (e.g., flat top with engagement features) that interfaces with equipment feet, and a bottom surface that contacts the lumber. This localized geometric design optimizes vibration isolation at the specific mounting interface while maintaining the overall simplicity and universality of the rubber device itself.
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 assembly effectively isolates vibrations and supports rooftop equipment by accommodating different weight capacities through a flexible, friction-fit design, ensuring secure fastening and efficient damping of lateral vibrations.
Implementation Method 1
the isolator is comprised of rubber and different durometers of the rubber may be used to support different weight capacities
Implementation Method 2
efficient damping of lateral vibrations
Data Source
AI summary
A vibration isolation assembly is useful with dimensional lumber such as pressure treated lumber used as dunnage for placing air conditioners and other rooftop mounted equipment. The assembly includes a support member and a rubber isolator member adapted to engage the support member.