Telescoping Bar Hanger Assembly With Reduced Installation Play
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Solution Overview
Problem
Conventional bar hanger assemblies suffer from excessive unwanted play, mechanical instability, and manufacturing complexity due to loose fitting and difficult bending requirements, leading to alignment and positioning challenges during installation.
Innovation Solution
The proposed bar hanger assembly features a design with bar hangers that physically contact each other at multiple points, reducing unwanted play through compressive forces and frictional resistance, and are manufactured with offset angles between segments that allow for easier fabrication, ensuring mechanical strength and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If bar hangers are fitted together loosely to allow sliding adjustment, then ease of operation is improved, but unwanted play and mechanical instability increase
Solution Approach 1:
The patent applies parameter changes by modifying the contact geometry between bar hangers. Specifically, the contact surfaces are designed with complementary shapes (e.g., convex and concave surfaces) that change the physical parameters of the interface. This allows the bar hangers to maintain tight contact (reducing play) while still permitting sliding movement along the desired axis, thus resolving the contradiction between ease of operation and mechanical stability.
Solution Approach 2:
The patent implements dynamics by creating a contact interface that is dynamic in nature - the bar hangers can slide relative to each other along one axis while maintaining constant contact pressure. The contact surfaces are designed to allow controlled movement in the adjustment direction while preventing unwanted movement in perpendicular directions, thus providing both ease of operation and mechanical stability simultaneously.
2Stability of the object's composition
If bar hangers are shaped with tight fitting to reduce unwanted play, then mechanical stability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the bar hanger into distinct functional segments with standardized contact surfaces. Each bar hanger is designed with modular contact features that can be manufactured independently using standard bending tools. The contact surfaces are segmented into specific zones (e.g., sliding surfaces, contact surfaces, non-contact regions) that simplify the manufacturing process while maintaining tight fitting and mechanical stability.
Solution Approach 2:
The patent employs asymmetry in the contact surface design where one bar hanger has a convex contact surface that complements a concave surface on the other bar hanger. This asymmetric design creates a tight fitting interface that reduces unwanted play, while the asymmetry is deliberately designed to be manufacturable using standard bending operations, thus avoiding excessive manufacturing complexity.
3Adaptability or versatility
If bar hangers are extended to cover larger gaps, then adaptability is improved, but unwanted play increases due to reduced physical overlap
Solution Approach 1:
The patent applies the nesting principle by designing the bar hangers with telescoping capabilities. The bar hangers can be extended or repositioned to cover larger gaps between support structures, and the nested design maintains physical overlap between the contact surfaces throughout the range of motion. This ensures that even when extended, the bar hangers maintain tight contact and minimize unwanted play, thus preserving both adaptability and mechanical stability.
4Shape
If adjoining segments are bent by more than 90 degrees to achieve compact shape, then shape is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent applies partial action by bending the adjoining segments of the bar hanger to angles that are substantial but not excessive (e.g., between 45 and 135 degrees). This partial bending achieves the desired compact cross-sectional shape while remaining within the capabilities of standard manufacturing tools. The bending angles are optimized to provide sufficient compactness without requiring multiple manufacturing steps or specialized tooling, thus resolving the contradiction between shape and ease of manufacture.
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 significantly reduces unwanted movement and enhances manufacturing ease by providing a more stable and rigid assembly with reduced play, facilitating easier alignment and installation while maintaining adjustability.
Implementation Method 1
the bar hangers were often fitted together loosely, which resulted in unwanted play between the bar hangers
Data Source
AI summary
A bar hanger assembly is used to couple a housing to a support structure. The bar hanger assembly may include a bar hanger holder to mechanically couple the bar hanger assembly to the housing, such as a junction box, a can housing, or a frame. The bar hanger holder may define a channel to mechanically guide and support a pair of bar hangers. The bar hangers may be mechanically coupled together in a telescoping manner such that the first bar hanger is slidably adjustable with respect to the second bar hanger. The bar hanger holder and each bar hanger may physically contact one another and, in some instances, generate a compressive force to substantially reduce unwanted play. Each bar hanger may include a bar hanger head to couple the bar hanger assembly to various types of support structures, such as a T-bar, a stud, a joist, or a frame.