Spring-Loaded Tubular Actuators for Manual Boat Canopy Deployment
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Solution Overview
Problem
Existing retractable canopy systems for boats are either burdensome due to their weight and complex installation requirements or limited in providing extended sunshade protection, and there is a need for a system that is self-supporting, easy to mount, and affordable.
Innovation Solution
A manually-operated canopy deployment system using spring-loaded tubular actuators telescopically assembled in parallel alignment, with a gear box to control canvas deployment, designed for easy attachment to existing boat structures, providing extended sunshade protection without obstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If automated canopy systems are used, then deployment speed is improved, but weight and installation complexity increase
Solution Approach 1:
The patent replaces automated motorized mechanisms with a manual crank-operated windlass system. The windlass uses a drum and spool mechanism where the user turns a crank to wind the canopy onto the drum, eliminating heavy motors and complex electrical systems while achieving reliable deployment and retraction.
Solution Approach 2:
The patent uses a simplified mechanical model based on traditional windlass designs found in maritime applications. By copying the proven mechanical principles of drum-and-spool systems used in anchor windlasses and capstan operations, the invention achieves automated-like functionality through pure mechanics without requiring electrical power systems.
2Speed
If automated canopy systems are used, then deployment speed is improved, but installation complexity increases
Solution Approach 1:
The patent replaces automated motorized mechanisms with a manual crank-operated windlass system. The windlass uses a drum and spool mechanism where the user turns a crank to wind the canopy onto the drum, eliminating heavy motors and complex electrical systems while achieving reliable deployment and retraction.
Solution Approach 2:
The manual crank system is designed to be self-installed by the boat owner without requiring professional electrical wiring or complex mechanical assembly. The windlass mechanism comes pre-assembled with the drum, spool, and crank handle, requiring only mounting to the boat structure and connection of the canopy to the drum, making installation straightforward and maintenance simple.
3Object-affected harmful factors
If foldable bimini tops are used, then sunshade protection is provided, but deck obstruction occurs
Solution Approach 1:
The patent employs a retractable canopy system mounted on a rigid framework that can be extended or retracted as needed. The canopy is attached to a drum mechanism that winds the canvas onto the drum, allowing the structure to dynamically adjust between providing full sunshade protection and being completely retracted to clear the deck for fishing, docking, or equipment loading activities.
Solution Approach 2:
The rigid framework with retractable canopy serves multiple functions: it provides structural support for the sunshade, acts as a mounting platform for the windlass mechanism, and when the canopy is retracted, the framework itself can serve as a decorative or functional element on the boat. The system combines the benefits of fixed structure stability with the flexibility of retractable protection.
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 system offers lightweight, self-supporting, and affordable sunshade protection that is easy to operate and mount, suitable for various boat styles, and does not obstruct deck activities, while being cost-effective and simple to assemble.
Implementation Method 1
compression springs separately disposed within the respective chambers of the outer tube and intermediate interior tube to apply outbound forces axially upon the inner ends of the respective interior tubes
Data Source
AI summary
A manually-operated canopy deployment system for mounted attachment onboard recreational boats comprises a pair of spring-loaded tubular actuators telescopically assembled and coupled in parallel alignment to deploy a flexible canvas from a roller member transversely mounted between the actuators with a gear box operatively connected to the roller member to control the canvas deployment. Each actuator assembly includes a rearward outer tube, and separate forward and intermediate interior tubes each fitted with inner end caps and coaxially disposed to move longitudinally within the outer tube, with compression springs separately disposed within the respective tube chambers to apply outbound forces axially upon the inner ends of the respective interior tubes. Forward and intermediate cross bars connected across the interior tubes serve to draw the canvas from the roller member and support canvas deployment, with a pair of loop attachments provided on the surface of the canvas to prevent billowing thereof.