Extendable Multihull Deck with Amidships Pontoons
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Solution Overview
Problem
Existing multihull boat designs lack sufficient deck space and stability, especially when extending decks longitudinally, as they often lack buoyancy, leading to instability in rough waters and reduced loading capacity.
Innovation Solution
A multihull boat design featuring an upper deck supported by abeam pontoons with a lower deck that is slidably connected through elongated guides, providing longitudinal buoyancy via amidships pontoons or a monohull, which extends to increase deck space and storage while maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the deck is extended longitudinally without buoyancy support, then the deck space is increased, but the stability and elevation of the deck is compromised
Solution Approach 1:
The patent applies buoyancy support elements (pontoons or floats) beneath the extended deck section to counteract the weight of the deck structure and support it at an elevated position. This buoyancy counterweight system maintains the deck's elevation and stability while extending the deck space, preventing the deck from sloping downward toward water level.
2Area of stationary object
If the deck is extended longitudinally without buoyancy support, then the deck space is increased, but the loading capacity is reduced
Solution Approach 1:
The buoyancy support elements provide upward floating force that offsets the weight of the extended deck structure. This allows the deck to be extended without proportionally increasing the overall weight of the watercraft, as the buoyancy elements displace water to support the additional structural weight, thereby preserving loading capacity.
3Device complexity
If the ramp slopes toward the water level, then the structure is simplified, but the safety and stability in rough waters is reduced
Solution Approach 1:
The buoyancy support elements maintain the extended deck section at a consistent elevated position above water level, preventing it from sloping downward toward the water. This buoyant support system ensures the deck remains stable and safe in rough waters by counteracting the gravitational force that would otherwise cause the deck to slope and dip toward water level.
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 design enhances deck space, storage capacity, and stability by maintaining the lower deck elevated and parallel to the upper deck, even in rough waters, without reducing the overall buoyancy of the watercraft, thus improving usability and safety.
Implementation Method 1
Longitudinal buoyancy is provided the lower deck by means of one or more amidships pontoons or a monohull
Implementation Method 2
An upper deck is supported on a bottom side by one or more abeam pontoons or a pier structure
Data Source
AI summary
An extendable and retractable lower deck for a watercraft is attached to and supported by one or more amidships hulls. The lower deck and hulls slide between an extended position and a stowed position on rails that are secured to the underside frame of the main, upper deck that is supported by abeam hulls. When fully extended, the extendable deck remains attached to the watercraft. A rotatable gate positioned within the lower hull can be used for improved accessibility to and from the water; the gate is stowed when its distal end is in the raised position and is deployed when its distal end extends below the bottom side of the hull into the water in the lowered position. Laterally expandable panels in the lower deck provide increased width, and other accessories used with the watercraft can be contained in one or more storage holds in the amidships hull.