Adjustable Watercraft Bailer With Indexed Flap
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Solution Overview
Problem
Existing bailers for watercraft, such as Elvstrom-type bailers, have limited drainage area and are not adjustable, leading to inefficient water removal and excessive drag, as they can only be fully open or closed, making it difficult to manage drainage rates.
Innovation Solution
The development of automatic bailers that are open on three or two sides, featuring an adjustable handle with indexed positions and a sliding or pivotable flap, allowing for partial opening to control drainage speed and minimize drag, and can be mounted in various locations on watercraft for enhanced usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bailer is opened to allow water drainage, then water removal efficiency is improved, but drag on the boat increases
Solution Approach 1:
The bailer gate is made adjustable rather than fixed, allowing it to be positioned at different opening angles. This dynamic adjustment capability enables the user to optimize the balance between drainage rate and drag based on actual operating conditions, resolving the contradiction by making the system adaptable rather than static.
Solution Approach 2:
The invention changes the parameter of gate opening angle from fixed to variable. By providing multiple adjustable positions (including fully closed, partially open, and fully open), the system can modify its drainage parameter to match different operational requirements, thereby controlling both drainage efficiency and drag simultaneously.
2Productivity
If the bailer is fully open to maximize drainage, then water removal speed is improved, but drag and difficulty of adjustment increase
Solution Approach 1:
The bailer gate is divided into multiple discrete adjustment positions rather than being continuously variable. The indexed positions (such as fully closed, approximately 45 degrees, approximately 90 degrees, and fully open) provide distinct drainage rates, making it easier for users to select appropriate settings without the complexity of continuous adjustment while still providing sufficient drainage control.
Solution Approach 2:
The gate is designed with a handle that enables easy positioning at different angles. The indexing mechanism provides tactile feedback and stable positioning at predetermined angles, making the adjustment process simple and intuitive while maintaining the ability to achieve full drainage when needed.
3Object-generated harmful factors
If the bailer is fully closed to eliminate drag, then drag is reduced, but water drainage capability is lost
Solution Approach 1:
The bailer gate transitions from a fixed closed position to an adjustable system that can be opened to various degrees. This dynamic capability allows the gate to remain fully closed when drainage is not needed (eliminating drag) while enabling partial or full opening when water removal is required, thus resolving the contradiction between drag reduction and drainage capability.
Solution Approach 2:
The opening angle parameter of the gate is made variable, allowing it to change from 0 degrees (fully closed, no drag) to various intermediate angles (controlled drainage) to 90 degrees or more (full drainage). This parameter variability enables the system to adapt to different operational conditions, eliminating the need to choose between drag and drainage capability.
4Ease of manufacture
If conventional bailers are used with limited opening area, then manufacturing is simpler, but drainage efficiency is reduced
Solution Approach 1:
The bailer gate is segmented into multiple adjustable sections or positions rather than being a single fixed structure. This segmentation allows for increased effective drainage area through multiple opening positions while maintaining relatively simple construction of each individual position, resolving the contradiction between manufacturing simplicity and drainage efficiency.
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 new bailers provide a higher drainage-to-drag ratio, allowing for efficient water removal without excessive drag, and can be easily adjusted to suit different conditions, ensuring effective water evacuation while minimizing the risk of water backflow and drag.
Implementation Method 1
employ a wedge-shaped venturi having an opening facing the rear of the boat on the outside of the boat hull to permit outflow of water at high speed forward travel. The flow of deflected water draws water from inside the boat
Data Source
AI summary
A bailer for a watercraft which is open on two sides, i.e., the rear and one adjoining side, enabling more efficient drainage of water from a watercraft. An adjustable bailer is provided which may include a handle with indexed positions which allows the user to easily adjust how far the bailer is open to suit conditions. The handle can be operated by either the hand or foot. The indexing function enables a user to judge how far the bailer is open or closed.