Aircraft Waste Trolley Mechanical Linkage Compaction
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Solution Overview
Problem
Existing waste collection trolleys in aircrafts face challenges with limited waste capacity due to bulky and heavy electromechanical compactors, which occupy valuable space and have reliability issues, while vacuum-based systems require a fixed vacuum source, limiting mobility and intermediate compaction.
Innovation Solution
A trolley design featuring a pivotable flap and mechanical linkage that allows for increased waste capacity by expanding the waste chamber volume, enabling compacting of waste without additional motors, and allowing the trolley to be moved and parked efficiently within the aircraft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electromechanical waste compactors are used, then waste compaction capability is improved, but weight increases and space for waste collection is reduced
Solution Approach 1:
The patent replaces the electromechanical compaction system with a purely mechanical lever-based system. The lever (element 40) acts as a force multiplier, allowing manual compaction of waste bags without requiring electric motors, gears, or other heavy mechanical components. This substitution dramatically reduces the trolley's weight while maintaining effective waste compaction capability.
Solution Approach 2:
The invention extracts and eliminates the heavy electromechanical components (motors, gears, control systems) from the waste compaction system, retaining only the essential mechanical leverage principle. This extraction allows the trolley to achieve compaction functionality with minimal weight, using simple elements like the lever (40), pivot points (42, 44), and connecting elements (46).
2Power
If electromechanical waste compactors are used, then waste compaction capability is improved, but waste collection capacity is reduced
Solution Approach 1:
By replacing the bulky electromechanical compactor with a compact manual lever system, the patent frees up significant space within the trolley housing (element 10) for waste collection. The manual compaction mechanism requires minimal space compared to motorized systems, allowing the waste chamber to be enlarged while maintaining full compaction functionality.
Solution Approach 2:
The patent incorporates a movable flap (element 30) that can pivot between open and closed positions, dynamically adjusting the waste chamber volume. When the flap is open, the chamber expands to accommodate more waste; when closed, it seals the chamber for transport. This dynamic adjustment allows the system to maximize both collection capacity and compaction efficiency.
3Power
If vacuum-based waste compactors are used, then waste compaction capability is improved, but mobility is reduced due to fixed vacuum source requirement
Solution Approach 1:
The patent replaces the vacuum-based compaction system with a manual mechanical system that does not require connection to external vacuum sources. This substitution enables the trolley to operate independently throughout the aircraft cabin without being tethered to fixed infrastructure, significantly improving mobility and versatility.
Solution Approach 2:
The manual lever system allows the trolley to compact waste using its own mechanical advantage without requiring external power sources or vacuum systems. The operator directly applies force through the lever (40), which amplifies the effort to compress the waste bag, making the system self-sufficient and highly adaptable to different locations within the aircraft.
4Power
If vacuum-based waste compactors are used, then waste compaction capability is improved, but intermediate compaction is not practical
Solution Approach 1:
The manual lever system enables operators to perform intermediate compaction at any location along the flight path without requiring connection to fixed vacuum sources. The self-contained mechanical system can be activated whenever waste accumulation reaches a certain level, allowing flexible intermediate compaction operations throughout the aircraft cabin.
Solution Approach 2:
By extracting the trolley from dependency on fixed vacuum infrastructure, the patent enables intermediate compaction operations to be performed autonomously at various locations. The manual system can be operated independently, allowing cabin crew to compact waste during intermediate stops or when moving between locations, significantly improving operational flexibility.
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 trolley achieves a higher waste collection capacity with reduced external dimensions, improved mobility, and enhanced reliability by using a user-operated mechanical linkage to compact waste, eliminating the need for heavy machinery and fixed vacuum sources.
Implementation Method 1
a flap (20) connected by a first bearing (22) to the housing (4), in particular to its sidewall (8), such that the flap (20) is pivotable about a horizontal flap axis formed and/or determined by the first bearing (22) at least between a closing position and an opening position
Implementation Method 2
The handle (26) is connected by a second bearing (38) to the housing (4), such that the handle (26) is pivotable about a handle axis formed and/or determined by the second bearing (38) at least between a first handle position and a second handle position
Implementation Method 3
The handle (26) is linked to the flap (20) by a mechanical linkage (44), such that pivoting the handle (26) from its second handle position to its first handle position results in a pivoting of the flap (20) from its opening position to its closing position
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A trolley (2) for collecting waste includes: wheels (24), a steering handle (26), and a housing (4) with a bottomwall (6) and a sidewall (8) extending vertically from the bottomwall (6), wherein the housing (4) forms a waste chamber (10), wherein the sidewall (8) comprises an opening, wherein a flap (20) is connected by a first bearing (22) to the sidewall (8) of the housing (4), such that the flap (20) is pivotable about a horizontal flap axis between a closing position and an opening position. The flap (20) in its closing position closes the opening (18) of the sidewall (8), and the flap (20) in its opening position opens the opening (18) in the sidewall (8), wherein the handle (26) is connected by a second bearing (38) to the housing (4), such that the handle (26) is pivotable about a handle axis between a first handle position and a second handle position, and the handle (26) is linked to the flap (20) by a mechanical linkage (44), such that pivoting the handle (26) from its second handle position to its first handle position results in a pivoting of the flap (20) from its opening position to its closing position.