Adjustable Multi-Gang Mud Ring Assembly for Variable Wall Depths

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Existing mud ring assemblies for electrical boxes lack adjustability to accommodate varying wall thicknesses and box depths, leading to installation challenges and potential exposure of electrical components.

Innovation Solution

A multi-gang mud ring assembly featuring a base member, a raised member, a telescoping member, and drive members, allowing the telescoping member to move between retracted and extended positions through rotational adjustment of the drive members, ensuring proper depth and protection of electrical components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a fixed-depth mud ring assembly is used, then the structure is simple and easy to manufacture, but it cannot accommodate varying wall thicknesses and box depths

Engineering Contradiction:
Improveaccommodation of varying wall thicknessesVSAvoidmud ring assembly structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The mud ring assembly incorporates a telescoping member with drive members that enable dynamic adjustment of the mud ring depth. The drive members can be rotated to extend or retract the telescoping member, allowing the assembly to adapt to different wall thicknesses and box depths while maintaining a relatively simple overall structure.

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If a telescoping member with drive members is added for adjustability, then adaptability to different wall thicknesses is improved, but the device complexity increases

Engineering Contradiction:
Improveadjustability to wall thicknessesVSAvoidnumber of components
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The telescoping member is nested within the mud ring assembly, with the drive members positioned within the telescoping structure. This nesting arrangement allows the adjustable mechanism to be compact and integrated into the overall assembly without requiring excessive space or creating a cumbersome structure.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The drive members serve multiple functions: they act as adjustment mechanisms for the telescoping member, provide structural support, and can be used for mounting electrical devices. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If the telescoping member is made adjustable, then installation flexibility is improved, but the ease of operation decreases

Engineering Contradiction:
Improveinstallation flexibilityVSAvoidadjustment operation
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The drive members are designed to be self-adjusting through simple rotation. The telescoping member extends or retracts automatically as the drive members are rotated, eliminating the need for complex adjustment mechanisms or multiple steps. This self-service characteristic maintains ease of operation while providing installation flexibility.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS12155191B2Multi-gang adjustable mud ring assemblies
Publication Date: 2024.11.26 HUBBELL INC
  • US12155191B2 patent drawing
  • US12155191B2 patent drawing
  • US12155191B2 patent drawing

AI summary

A mud ring assembly includes a base member, a raised member, a telescoping member and a plurality of drive members. The base member has a flange and an opening through the flange. The raised member extends from the base member and follows the opening in the flange to form a raised wall. The raised member has a plurality of mounting tabs extending from the raised wall toward the opening in the raised member. The telescoping member is positioned within the raised member opening and is movable relative to the raised member between a retracted position and an extended position. The telescoping member has a wall, an opening and a plurality of mounting tabs extending from the wall toward the opening in the telescoping member. The wall of the telescoping member includes a plurality of protective members. Each protective member is positioned in proximity to one of a plurality of mounting tab pairs. In this configuration, one of the plurality of drive members is operatively coupled to the mounting tabs of one of the mounting tab pairs, such that rotation of the drive members causes the telescoping member to move between the retracted position and the extended position.