Sling Bar Hub Niches for Balanced Hand Control Mounting

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Solution Overview

Problem

Existing lift systems face issues with off-centered hand control devices causing sling bars to tilt or become unbalanced, making it difficult to place slings or other devices on the sling bar.

Innovation Solution

A sling bar design featuring a central hub with a ferromagnetic insert and niches for securing a hand control device magnetically, maintaining the center of gravity and preventing tilting, along with a mounting linkage for attachment to a lifting device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the hand control device is mounted off-center on the sling bar, then the device can be securely attached, but the sling bar becomes unbalanced and tilts

Engineering Contradiction:

Improveattachment securityVSAvoidsling bar balance

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent employs asymmetric niche positioning on the sling bar to accommodate the hand control device. The niche is located at a specific offset distance from the centerline, creating an asymmetric mounting configuration that simultaneously achieves secure attachment and maintains operational balance by positioning the control device within the operator's natural reach zone.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent transitions from considering only the horizontal positioning of the hand control device to incorporating vertical positioning through the niche depth and angle. The niche extends downward from the sling bar surface at a specific angle, allowing the device to be mounted in three-dimensional space rather than merely along a linear axis, thereby achieving both security and balance.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of operation

If the hand control device is held continuously in the user's hand, then full control is maintained, but convenience is reduced

Engineering Contradiction:

Improvecontrol accessibilityVSAvoidoperation procedure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent implements a self-service mounting system where the hand control device can be autonomously attached to and detached from the sling bar niche without requiring tools or complex procedures. The niche geometry and device interface are designed to engage through simple insertion and magnetic attraction, allowing users to securely mount the device when needed and easily remove it when not in use.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent creates a dynamic mounting system where the hand control device transitions between a mounted state (when attachment is needed) and a removed state (when not needed). This dynamic configuration allows the device to be permanently accessible through the niche while remaining removable, adapting to the user's immediate needs rather than requiring continuous handheld operation.

Inventive Principle:

Principle #15Dynamics

3Reliability

If a magnetic mounting structure is used for the hand control device, then secure attachment is achieved, but the structural complexity of the sling bar increases

Engineering Contradiction:

Improvedevice attachmentVSAvoidsling bar structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent embeds the magnetic mounting structure within the niche geometry of the sling bar. The magnet is positioned inside the recessed niche space rather than adding external protrusions or separate mounting mechanisms. This nesting approach integrates the magnetic attachment function into the existing structural form, achieving secure device attachment while minimizing additional structural complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent combines multiple functions into the niche structure: the niche serves as both the structural recess for device mounting and the housing for the magnetic attachment mechanism. The magnetic magnet is integrated within the niche boundaries, merging the mounting structure and attachment mechanism into a single unified feature rather than separate components.

Inventive Principle:

Principle #5Merging (Combining)

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 ensures the hand control device remains accessible and secure, preventing the sling bar from tilting and facilitating easy placement of slings, while maintaining balance and ease of use.

Implementation Method 1

The hand control device may include a mounting block, such as a magnetic mounting block, configured to interface with a niche of the one or more niches, such that the hand control device becomes magnetically coupled to the ferromagnetic material within the central hub

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12409089B2Sling bars and lift assemblies including sling bars

Publication Date: 2025.09.09 LIKO RES & DEV

AI summary

A sling bar includes a frame defining a central hub, a first hook extending from the central hub, and a second hook extending from the central hub. The central hub includes a wall defining an internal hollow region and an external hub surface, the internal hollow region shaped and sized to receive a ferromagnetic insert therein, and one or more niches formed within the wall and recessed into the wall from the external hub surface, the one or more niches arranged radially around the internal hollow region and sized and shaped to receive a hand control device.