Moveable Davit Arm with Bearing System for Limited Roof Deployment

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Solution Overview

Problem

Davit arm systems are often too large for limited roof areas, requiring significant space during erection and limiting their size and deployment flexibility.

Innovation Solution

A davit arm system design featuring a moveable arm supported by a davit body with a bearing system, including polymer sleeves or ball transfer bearings, allowing the arm to be raised and fixed using a tensioning cable and anchor system, which reduces the footprint and facilitates deployment on smaller roofs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a traditional davit arm system is used, then the system provides stable support and load-bearing capacity, but it requires a large roof area during erection and deployment

Engineering Contradiction:

Improveroof area requiredVSAvoidsystem stability

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The davit arm system is divided into multiple segments including a davit body, an arm, and a platform. These segments can be independently assembled and deployed, reducing the overall footprint required during erection while maintaining structural stability through proper connection mechanisms.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The arm and platform are designed to nest within or alongside the davit body during storage and transport. This nesting arrangement minimizes the roof area occupied during non-operational states and during the erection process, while allowing full deployment when needed.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If a large davit arm system is deployed, then the system can support heavier loads and provide greater workspace, but it cannot be used on roofs with limited area

Engineering Contradiction:

Improvedeployment flexibilityVSAvoidroof area required

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The davit arm is designed with moveable components that can be adjusted along the length of the davit body. This dynamic configuration allows the system to adapt to different workspace requirements while maintaining a compact footprint during erection and storage, enabling deployment on roofs of various sizes.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system utilizes vertical space and three-dimensional arrangement rather than solely horizontal expansion. The arm can be positioned at different heights and angles, providing versatile workspace without requiring proportionally larger roof area, thus enabling deployment on limited-space roofs.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Ease of operation

If the arm is made moveable along the davit body, then the system provides adjustable positioning and flexibility, but it increases device complexity

Engineering Contradiction:

Improvearm adjustabilityVSAvoidsystem complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

A bearing system is introduced as an intermediary mechanism between the arm and the davit body. This bearing enables smooth movement and adjustment of the arm along the davit body while isolating the complexity of the movement mechanism, keeping the overall system design manageable and maintainable.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Complex mechanical adjustment mechanisms are replaced with simpler bearing-based systems that allow the arm to move freely along the davit body. This substitution reduces the number of moving parts and mechanical linkages, thereby reducing device complexity while maintaining ease of operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of operation

If a bearing system is added to enable arm movement, then the system achieves smooth positioning and reduced friction, but it increases device complexity and potential failure points

Engineering Contradiction:

Improvearm movabilityVSAvoidbearing system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The bearing system is designed using simple, readily available bearing components that are easy to replace if needed. While bearings do add some complexity, they use standardized, low-cost components that minimize the overall impact on system complexity and maintenance burden, achieving smooth arm movement with minimal compromise.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

Enables the efficient deployment and use of davit arm systems on roofs with limited space by minimizing the required area and allowing for adjustable height and secure attachment, enhancing usability and flexibility.

Implementation Method 1

a bearing is oriented between said arm and said davit body

Methodology Applied

Scientific EffectFriction reduction: Friction

Implementation Method 2

the method comprising raising the arm

Methodology Applied

Scientific EffectTension: Tension

Data Source

PatentUS10457528B2Davit arm

Publication Date: 2019.10.29 ENGINEERED SUPPLY LLC

AI summary

In some embodiments, a davit arm system comprises a davit body arranged to engage a support and an arm supported by the davit body. The arm is moveable along a length of the davit body. In some embodiments, a bearing is oriented between said arm and said davit body. In some embodiments, a bearing a polymer sleeve. In some embodiments, a bearing comprises rollers. In some embodiments, a bearing comprises ball transfer bearings. In some embodiments, a bearing excludes moving parts.