Adjustable Length Boathook With Cam-Lock Telescoping Tubes
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Solution Overview
Problem
Conventional boathooks with fixed hooks are inadequate for securely grasping lines in challenging docking conditions, such as high winds, and lack extendability, making it difficult to accurately place lines on desired fixtures.
Innovation Solution
An adjustable length boathook with a user-actuable, pivotably secured hook at the distal end, actuated by an internal rod connected to the handle, and utilizing cam-lock devices for length adjustment and hook operation, allowing for secure line grasping and precise maneuvering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed hook is used on a boathook, then the structure is simple and easy to manufacture, but it cannot securely grasp lines in challenging docking conditions
Solution Approach 1:
The hook is transformed from a fixed, static structure to a movable, dynamic structure that can open and close. The hook assembly includes a hook body that can rotate about a pivot point, allowing it to transition between open and closed positions. When the user actuates the handle, the rod moves to close the hook around the line, providing secure grasping in challenging conditions while maintaining operational simplicity.
2Length of moving object
If an adjustable length boathook is used, then extendability and reach are improved, but the hook cannot accurately place lines on desired fixtures
Solution Approach 1:
The dynamic hook mechanism enables precise line placement by allowing the user to open and close the hook at the exact moment and position needed. The hook can be opened to receive the line, positioned accurately on the desired fixture, and then closed to secure it. This dynamic control compensates for the extendability of the telescoping tubes, maintaining precision despite the adjustable length capability.
3Reliability
If a fixed hook is used, then the device structure is simple, but line slippage occurs through the hook during use
Solution Approach 1:
The movable hook design allows the hook to close around the line, creating friction and mechanical interlocking that prevents slippage. The hook body rotates to enclose the line, providing positive engagement rather than relying on a fixed hook that the line can slip through. This dynamic closing action secures the line reliably during docking operations.
4Productivity
If conventional boathooks are used in high wind conditions, then basic line retrieval is possible, but the process is extremely time consuming
Solution Approach 1:
The dynamic hook mechanism allows for rapid opening and closing actions, enabling quick line capture and securing. The user can quickly actuate the handle to close the hook around the line, eliminating the time-consuming process of manually tying knots or securing lines with fixed hooks. This significantly improves docking efficiency in high wind conditions where speed is critical.
Solution Approach 2:
The hook mechanism is designed to be self-actuating through the handle operation. When the user moves the handle, it directly actuates the rod that closes the hook, creating a self-contained operation that reduces the steps and time required for line securing compared to conventional methods requiring separate manipulation of fixed hooks and lines.
Data Source
AI summary
An adjustable length boathook includes a user-actuable hook at its distal end for securely grasping lines and the like. By enabling firm control of the line, the claimed embodiments facilitate specific maneuvers such as hooking a line around a cleat. The boathook uses first and second tubes telescopingly engaged for slidable movement along a common central axis, with third and fourth tubes disposed coaxially and internally thereto, the telescoping engagement providing length adjustability. Cam-lock devices are disposed between the first and second tubes, and between the third and fourth tubes, and lock their respective tubes to one another at a desired length. A handle is slidably disposed at a proximal end of the first tube to actuate the third tube in the axial direction relative to the first tube. A user-actuatable hook at the distal end of the second tube is actuated by the fourth tube.