Towing Frame for Personal Watercraft Preventing Jackknifing
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Solution Overview
Problem
Existing towing devices for personal watercraft behind a boat often cause the watercraft to jackknife or swing out, interfere with the boat's swim platform, and add significant weight, affecting planing and space usage.
Innovation Solution
A device comprising a towing member and a stabilizing member, where the towing member connects the rear of the towing watercraft to the front of the personal watercraft, and the stabilizing member extends from the towing watercraft to a point above the personal watercraft, limiting lateral and longitudinal movement, preventing jackknifing and interference with the swim platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the personal watercraft is placed directly on top of the boat's swim platform, then the watercraft is securely held, but the device adds considerable weight to the stern of the boat and interferes with the availability and use of the swim platform
Solution Approach 1:
The patent transitions from placing the watercraft directly on the swim platform (2D surface placement) to suspending it in three-dimensional space below the platform using a frame structure. This spatial repositioning eliminates weight addition to the stern while maintaining secure holding through the submerged frame that restricts watercraft movement.
2Reliability
If the personal watercraft is placed directly on top of the boat's swim platform, then the watercraft is securely held, but the device interferes with the availability and use of the swim platform
Solution Approach 1:
The patent moves the watercraft holding function from the horizontal plane of the swim platform to a vertical three-dimensional structure extending below the platform. This allows the entire swim platform surface to remain fully accessible and usable while the frame structure provides secure watercraft restraint in the space beneath.
Solution Approach 2:
The holding function is segmented from the swim platform itself to a separate, independent frame structure. This separation allows the platform to serve its primary purpose as a usable surface while the dedicated frame structure performs the watercraft restraint function below it.
3Ease of operation
If known towing devices are used, then the personal watercraft can be towed behind the boat, but the watercraft may jackknife and swing out beyond the side of the boat
Solution Approach 1:
The frame structure proactively prevents jackknifing by establishing predetermined geometric constraints through its angled side members and transverse members. These structural elements create physical barriers that stop the watercraft from swinging outward or rotating excessively, maintaining stable alignment during towing operations before problems can occur.
4Ease of operation
If the personal watercraft is towed using conventional devices, then towing is possible, but the watercraft may interfere with or hit other craft when going through a channel
Solution Approach 1:
The frame structure preemptively prevents dangerous swinging and jackknifing movements that could cause collisions with other watercraft. By maintaining consistent, controlled alignment through its rigid geometric framework, the device eliminates the unpredictable motion patterns that create collision risks in confined channels.
Data Source
AI summary
An apparatus for towing a personal watercraft, including a towing member and a stabilizing member. The towing member is configured to attach a rear portion of the towing watercraft to a front portion of the personal watercraft. The stabilizing member comprises an elongated rigid body configured to attach to the rear portion of the towing watercraft and to extend to a stabilization point above a rear portion of the personal watercraft, and a flexible line member extending from the stabilization point of the elongated rigid body for attachment to the rear portion of the personal watercraft. The flexible line member is configured to limit lateral movement of the rear portion of the personal watercraft relative to the towing watercraft.