Driven Guide Systems for Lifts Preventing Binding

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Solution Overview

Problem

Existing lift systems face limitations in load capacity and stability due to the vertical force and platform stability, leading to potential binding issues when telescoping arms are at angles less than 10 degrees.

Innovation Solution

A driven guide system comprising telescoping arms pivotally coupled between a base and a platform, with a pivot support assembly allowing longitudinal travel of pivot anchors and a drive assembly that controllably moves the extension portions and pivot anchors to maintain stability and adjust arm lengths, ensuring sufficient lifting force and preventing binding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If telescoping arms are used in lift systems, then the lifting mechanism can provide vertical force, but binding issues occur when arms are at angles less than 10 degrees

Engineering Contradiction:
Improvevertical lifting forceVSAvoidbinding prevention
Core Design Contradiction:
ForceVSReliability

Solution Approach 1:

The patent applies dynamics by making the pivot anchor movable along the telescoping arm rather than fixed. The pivot support assembly allows the pivot anchor to move dynamically with the arm's angle, ensuring the pivot assembly maintains proper alignment and prevents binding even when arms are at low angles during extension and retraction.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The pivot support assembly acts as an intermediary component between the telescoping arm and the pivot assembly. It facilitates controlled movement of the pivot anchor and provides guidance, mediating the interaction between moving parts to prevent binding while maintaining lifting force.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Device complexity

If the pivot assembly is fixed, then the structure is simpler, but binding occurs at low arm angles

Engineering Contradiction:
Improvepivot assembly structureVSAvoidbinding prevention
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

Instead of a fixed pivot assembly, the patent implements a dynamic configuration where the pivot anchor can move along the telescoping arm. This dynamic arrangement adds some complexity but reliably prevents binding by adapting to changing arm angles during operation.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The pivot support assembly serves as an intermediary mechanism that introduces controlled movement capability. It adds the necessary complexity to enable the pivot anchor to track properly with arm angle changes, thereby preventing binding without requiring complete redesign of the pivot assembly.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of manufacture

If the pivot anchor is fixed on the arm, then manufacturing is easier, but the system cannot adapt to angle changes without binding

Engineering Contradiction:
Improvepivot anchor attachmentVSAvoidangle adaptation
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent transitions from a static pivot anchor attachment to a dynamic one. The pivot anchor is mounted on the pivot support assembly which allows it to move along the arm, enabling adaptation to various arm angles while maintaining relatively simple manufacturing through standardized moving joint components.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The pivot support assembly segments the pivot anchor from the main arm structure, allowing independent movement. This segmentation enables the pivot anchor to adapt to angle changes separately from the arm's primary motion, improving versatility without significantly complicating manufacturing.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS9321618B2Driven guide systems for lifts
Publication Date: 2016.04.26 MCINTOSH DAVID
  • US9321618B2 patent drawing
  • US9321618B2 patent drawing
  • US9321618B2 patent drawing

AI summary

An apparatus comprising a pair of telescoping arms pivotally coupled between a base and a platform. Each arm comprises a base portion pivotally coupled to the base to pivot about a base pivot axis, an extension portion slidably coupled to the base portion and pivotally coupled to the platform to pivot about a platform pivot axis, and, a pivot support assembly attached along a side of one arm of the pair facing toward the other arm of the pair. The pivot support assembly is configured to allow longitudinal travel of a pivot anchor with respect to the base portion. The pivot assembly is coupled between the pivot anchors. The drive assembly is connected to controllably move the extension portions inwardly and outwardly with respect to the corresponding base portions, and controllably move the pivot anchors toward and away from the corresponding base pivot axes.