Convertible Trailer Liner and Lift Frame for Bulk Liquid Hauling

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Solution Overview

Problem

Existing freight vehicles struggle to efficiently handle both piece goods and bulk liquids without incurring significant waste and high cleaning costs, as current systems are cumbersome, unsafe, and inefficient for liquid transportation.

Innovation Solution

A convertible trailer system with modular, easily assembled polyethylene liners and hydraulic lifting mechanisms allows for seamless conversion between cargo space for piece goods and bulk liquid transport, minimizing waste and reducing cleaning costs through a robust, easy-to-use design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a specialized liquid bulk tanker trailer is used, then liquid bulk transport capability is improved, but the vehicle cannot handle piece goods and requires expensive truck washing

Engineering Contradiction:

Improvecargo space convertibilityVSAvoidcleaning cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The cargo space is segmented into two functional zones: a permanent piece goods area with flooring and a removable liquid bulk tank. This segmentation allows the same vehicle to handle both piece goods and liquid bulk separately, eliminating the need for specialized tanker trailers while reducing cleaning costs through the disposable liner system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs disposable polyethylene liners that are inserted into the liquid bulk tank for each transport run. These single-use liners eliminate the need for expensive and time-consuming truck washing operations, reducing cleaning costs from approximately $500 per load to the minimal cost of replacing disposable liners.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Productivity

If a bulk liquid transport system with sidewall-mounted containers is used, then liquid transport capability is improved, but floor space is reduced and loading efficiency deteriorates

Engineering Contradiction:

Improveloading efficiencyVSAvoidfloor space

Core Design Contradiction:

ProductivityVSArea of stationary object

Solution Approach 1:

Instead of mounting liquid bulk containers on the sidewalls (two-dimensional attachment), the patent positions the liquid bulk tank on the floor of the cargo space, utilizing the vertical dimension and floor area. This allows full use of the trailer's length and width for loading piece goods, maintaining loading efficiency while providing adequate liquid bulk transport capacity.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Adaptability or versatility

If a bulk liquid transport system is used, then liquid transport capability is improved, but safety during loading deteriorates due to hazardous operating conditions

Engineering Contradiction:

Improveliquid bulk transport capabilityVSAvoidoperator safety

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The cargo space is divided into separate functional zones: a permanent piece goods loading area with proper flooring and a removable liquid bulk tank. This segmentation allows piece goods to be loaded in the designated area while the liquid tank remains separate and secure, eliminating safety hazards associated with operating forklifts near liquid containers and preventing damage to both cargo types.

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If a convertible cargo space is used, then versatility is improved, but liquid containment integrity may worsen without proper liner design

Engineering Contradiction:

Improvecargo space convertibilityVSAvoidliquid containment integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent uses flexible polyethylene liner bags that conform to the interior shape of the cargo space. These liners are made from food-grade polyethylene material that is resistant to chemical contamination and provides reliable liquid containment. The liners can be easily inserted and removed, maintaining containment integrity while enabling cargo space convertibility.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The liquid bulk transport system combines the permanent structural components of the trailer (steel frame, flooring) with removable polyethylene liner bags. This composite approach leverages the strength and durability of the trailer structure while utilizing the chemical resistance and flexibility of the polyethylene liners to ensure liquid containment integrity.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS12576773B1Convertible trailer system for hauling general cargo or liquid in bulk

Publication Date: 2026.03.17 BONERB TIM

AI summary

A freight vehicle has a cargo space that is convertible for handling piece goods and is also suitable for hauling liquid bulk material. A conventional cargo space is equipped with a drop-down frame and flexible liquid enclosure that is stowed in the ceiling of the trailer while hauling a full load of palletized or piece goods materials that can be lowered to the floor for transporting liquid bulk loads. Generally, the long tubular (round and or oval in shape from an end view) can be fitted with a polyethylene film disposable liner. The disposable poly liner will ensure the liquid freight is free from contamination. This concept not only eliminates the need for a liquid tanker to be washed out between each load but also allows for the hauling of piece goods freight when the frame system is raised back to the ceiling.