Stern-Mounted Dinghy Holding Device with Hook Coupling
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Solution Overview
Problem
Traditional methods for attaching and transporting dinghies on yachts are unsafe, obstructive, and inefficient, leading to vision obstruction, space issues, laborious handling, and risk of damage or loss, especially in high winds and waves.
Innovation Solution
A holding device with hook-shaped coupling outriggers and pickups that securely attach the dinghy to the yacht, allowing it to be lifted and locked at an angle, providing a strong and stable connection even in high winds, and enabling easy handling by one person.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dinghy is transported on the boat (bow or cabin roof), then the dinghy is securely held, but the skipper and crew's forward view is obstructed and valuable space is taken up
Solution Approach 1:
The holding device relocates the dinghy from horizontal positions (bow or cabin roof) to a vertical dimension at the stern, suspending it below the yacht's transom. This dimensional change eliminates obstruction of the forward view and frees up onboard space while maintaining secure holding through the mechanical coupling system with outriggers and receivers.
2Ease of operation
If the dinghy is attached to the stern with a rope, then the dinghy can be carried, but at wind speeds of approximately 20 knots the dinghy can lift off and be thrown through the air, potentially causing damage or injury
Solution Approach 1:
The hook-shaped coupling on the outriggers engages with the curved surface of the receiver's coupling axis, creating a mechanical interlock that prevents the dinghy from lifting off in high winds. The geometric shape provides inherent retention without requiring complex locking mechanisms, maintaining both simplicity and reliability.
Solution Approach 2:
The outriggers are pre-positioned and the hook-shaped couplings are ready to engage with the receivers before the dinghy is lifted into position. This preliminary arrangement ensures that as soon as the dinghy is hoisted, the mechanical coupling automatically engages, providing immediate secure attachment without requiring additional steps during critical moments.
3Reliability
If the dinghy is carried suspended from davits, then the dinghy can be securely transported, but the solution is more expensive and requires corresponding space on board, so it is only practical for larger yachts
Solution Approach 1:
The holding device is divided into separate modular components: outriggers with hook-shaped couplings attached to the dinghy, and receivers with coupling axes mounted on the yacht. This segmentation allows the system to be installed on yachts of various sizes without requiring extensive structural modifications, reducing both complexity and space requirements compared to traditional davits.
Solution Approach 2:
The receiver structure serves multiple functions: it provides mounting points for the coupling axes, acts as the attachment interface to the yacht's stern, and supports the mechanical locking action. This multi-functionality reduces the number of separate components needed, simplifying the overall system while maintaining secure transport capability.
4Ease of operation
If the dinghy is located in the bow area, then the dinghy is easily accessible, but the crew is limited in its ability to perform necessary work and lines can become entangled in the dinghy
Solution Approach 1:
The dinghy is extracted from the bow area and relocated to the stern suspension position. This removal from the problematic location eliminates the harmful effects of line entanglement and obstruction of crew work areas, while the dinghy remains easily accessible through the hoisting and lowering mechanism operated from the cockpit.
Data Source
Figure 1
Figure 2~3B
Figure 4~5
AI summary
The invention relates to a holding device for fastening, to the stern area of a ship, a ship's boat or an additional component to be detachably carried along, which device comprises a plurality of arms (1, 2) which have a hook-shaped coupling (3) and are rigidly or detachably connected to the ship's boat or additional component, and a plurality of receiving portions (6) which comprise at least one coupling shaft (7) and are mounted on the stern or on an additional part of the ship permanently installed on the stern in such a way that said arms are hooked into the coupling shaft by the hook-shaped coupling and by a rotation of the arm or the receiving portion about the coupling shaft are locked in place when a defined angle of rotation is reached.