Transparent Telehandler Cab Roof for FOPS Visibility
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Solution Overview
Problem
Existing telehandler cabs suffer from obstructed visibility for operators due to protective grilles, which while providing protection from falling objects, hinder the operator's view of loads being carried above the cab.
Innovation Solution
A telehandler cab design featuring a transparent or semi-transparent protective cover for the roof, which satisfies FOPS standards by deforming or breaking under impact without allowing objects to pass through, thus providing unobstructed visibility for the operator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective grille is used above the cab roof, then protection from falling objects is improved, but visibility for the operator deteriorates
Solution Approach 1:
The patent applies transparency changes (a variant of optical property changes) by replacing the opaque protective grille with a transparent or semi-transparent protective cover. This allows the cover to transmit light and provide unobstructed visibility while maintaining protective function. The cover material is specifically chosen to be transparent to visible light, resolving the contradiction between protection and visibility.
Solution Approach 2:
The protective cover is made from composite materials that combine protective properties with optical transparency. The cover can be made from transparent polycarbonate, tempered glass, or laminated glass composites that provide both impact resistance (protection from falling objects) and light transmission (visibility). This composite material approach allows simultaneous achievement of both protection and visibility requirements.
2Reliability
If a continuous opaque plate is used above the roof, then protection from falling objects is improved, but visibility for the operator deteriorates
Solution Approach 1:
The patent replaces the opaque plate with a transparent or semi-transparent cover, changing the optical properties from opaque to transparent. This allows the operator to see through the protective cover without obstruction, maintaining both protection and operational ease. The transparency enables direct observation of loads and equipment above the cab.
Solution Approach 2:
The patent changes the key parameter of optical transparency from opaque to transparent/semi-transparent. This parameter change fundamentally alters the interaction between the protective cover and light, enabling visibility while maintaining protective function. The cover material is selected based on its transparency parameter to resolve the contradiction.
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 enhances operator visibility while maintaining high standards of protection from falling objects, thereby improving operating convenience and safety.
Implementation Method 1
designed to withstand the falling of material which is dangerous for the safety of an operator who is on board the cab (1)
Implementation Method 2
the cover (11) can deform and/or break down but does not allow the weight to pass through
Data Source
AI summary
Described is a telehandler having a cab (1) equipped with a roof (10) defined by a transparent or semi-transparent protective cover (11) which comprises one or more materials designed to withstand the falling of hazardous material for the safety of an operator onboard the cab (1).The cover includes a plurality of layers of which at least one layer made of glass and a layer made of polymeric material.