Angled Mini Arm Clevis Assembly for Compact Monitor Support

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Solution Overview

Problem

Existing extension arms are not well-suited for sleek, compact designs, as reducing component sizes can lead to performance issues, such as inability to support larger devices and loose connections due to inadequate engineering, which can be hazardous.

Innovation Solution

The design incorporates an adjustable support apparatus with angled clevis assemblies and tapered channels, allowing for a smaller gas spring that provides enhanced leverage and load support, along with an anti-loosening mechanism to prevent component separation during rotation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If component size is reduced to achieve compact design, then device compactness is improved, but load support capability deteriorates

Engineering Contradiction:
Improveextension arm sizeVSAvoidload support capability
Core Design Contradiction:
Volume of moving objectVSStrength

Solution Approach 1:

The patent applies parameter changes by modifying the geometric configuration of the clevis assembly (angling it relative to the endcap axis) and the channel structure (tapered design). These parameter changes allow a smaller gas spring to generate sufficient support force for heavier loads through optimized mechanical leverage and force distribution, resolving the contradiction between compact size and load support capability.

Inventive Principle:
Principle #35Parameter changes

2Volume of moving object

If component size is reduced to achieve compact design, then device compactness is improved, but connection stability deteriorates

Engineering Contradiction:
Improveextension arm sizeVSAvoidconnection stability
Core Design Contradiction:
Volume of moving objectVSReliability

Solution Approach 1:

The patent employs composite structural design by combining multiple components (clevis, endcap, channel, fasteners) with different geometric properties into an integrated assembly. The tapered channel and angled clevis work together as a composite structure that maintains connection stability despite reduced overall size, preventing loosening through interlocking geometry and distributed stress patterns.

Inventive Principle:
Principle #40Composite materials

3Volume of moving object

If smaller gas spring is used to achieve compact design, then device compactness is improved, but cost is reduced

Engineering Contradiction:
Improvegas spring sizeVSAvoidmanufacturing cost
Core Design Contradiction:
Volume of moving objectVSEase of manufacture

Solution Approach 1:

The patent uses parameter changes in the clevis assembly geometry (angling and positioning) to optimize the mechanical advantage of a smaller gas spring. This allows the use of a more cost-effective, smaller gas spring while maintaining adequate support capability through improved geometric configuration rather than relying solely on a larger, more expensive component.

Inventive Principle:
Principle #35Parameter changes

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

This configuration enables the extension arm to support heavier loads with a smaller gas spring, maintaining performance and flexibility while preventing loose connections, allowing for a more compact and cost-effective design.

Implementation Method 1

The combination of the upper and the lower channels 14, 16 and the first and the second endcaps 12, 18 form an adjustable parallelogram that permits a device coupled to the forearm extension 20 to be raised and lowered to a desirable height. The parallelogram retains its position by employing an extension/retraction device such as a gas spring 40

Methodology Applied
Scientific EffectGas spring: Spring

Data Source

PatentUS7540457B2Angled mini arm having a clevis assembly
Publication Date: 2009.06.02 HAT AGENT LLC
  • US7540457B2 patent drawing
  • US7540457B2 patent drawing
  • US7540457B2 patent drawing

AI summary

The present invention provides an extension arm apparatus with angled clevis operation to provide enhanced mechanical leverage. The clevis adjusts along a path angled relative to an axis of the device, which significantly boosts performance and can reduce the size of the apparatus. Upper and lower channels of the device taper from a first width to a second width, providing a sleek and functional apparatus that can be used with heavy monitors, displays or other user equipment. When a forearm extension attached to an endcap of the apparatus, an interlocking washer and shaft configuration prevents the forearm extension-endcap connection from loosening during operation.