Toolless Hydrofoil Assembly via Cam Locking Mechanism

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Solution Overview

Problem

Conventional hydrofoil systems face challenges in easily changing and assembling hydrofoil components, particularly due to the complexity, time, and tools required for swapping different sized wings, which can be inconvenient and add weight.

Innovation Solution

The hydrofoil system employs toolless connections using keyed connectors, allowing components such as the front wing, mast assembly, shaft housing, and rear wing to be securely joined without bolts or screws, with connections entirely internal to the hydrofoil surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If tool-based attachment mechanisms (bolts, screws) are used to connect hydrofoil components, then secure connections are achieved, but the system adds weight, requires tools for assembly/disassembly, and increases complexity

Engineering Contradiction:

Improveconnection strengthVSAvoidassembly complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent replaces traditional mechanical fastening systems (bolts, screws, nuts) with a cam-based locking mechanism. The cam lever converts rotational motion into linear locking action, securing components through a single leveraging motion rather than threaded engagement. This substitution eliminates the need for multiple fasteners and tools while maintaining secure connections.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The cam-based connection system is designed to be self-contained and toolless. The cam lever mechanism allows users to assemble and disassemble hydrofoil components using only hand operation, without requiring external tools like screwdrivers or wrenches. The system serves itself by integrating the locking mechanism directly into the connection interface.

Inventive Principle:

Principle #25Self-service

2Strength

If traditional bolts and screws are used to attach hydrofoil components, then secure connections are achieved, but the assembly process becomes time-consuming and requires specialty tools

Engineering Contradiction:

Improveconnection strengthVSAvoidassembly time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The patent replaces time-consuming threaded fastening operations with a cam-based locking mechanism that secures components in a single rotational motion. The cam lever design allows rapid engagement and disengagement without requiring threaded engagement, significantly reducing assembly time while maintaining connection strength.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The toolless cam-based system allows users to perform assembly and disassembly operations quickly using only hand power, eliminating the time required to locate, select, and use specialty tools like torx or hex head screwdrivers. The self-contained mechanism enables rapid component changes.

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If removable bolts and screws are used to change hydrofoil components, then component interchangeability is achieved, but corrosion occurs over time and adds weight

Engineering Contradiction:

Improvecomponent interchangeabilityVSAvoidhydrofoil weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The patent replaces multiple metal fasteners (bolts, screws, nuts) with a single cam-based locking mechanism that uses less material. The cam lever system achieves the same interchangeability function with reduced component count and material usage, thereby reducing overall weight while maintaining component adaptability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The cam-based connection system uses simpler, less expensive materials compared to traditional multi-fastener assemblies. The design prioritizes functionality over durability of individual fastener components, allowing for easier replacement and reducing the need for corrosion-resistant materials.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

4Strength

If specialty screwdrivers (torx, hex head) are required for hydrofoil assembly, then secure connections are achieved, but convenience is reduced and tool requirements increase

Engineering Contradiction:

Improveconnection strengthVSAvoidassembly convenience

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent replaces specialty screwdriver-based fastening systems with a cam lever mechanism that operates through direct hand manipulation. The cam-based locking action provides secure connections without requiring precision-driven fasteners, making the system accessible to users without specialized tools or technical expertise.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The cam-based connection system is designed for self-service operation by end users. The intuitive lever mechanism requires no specialized knowledge or tools, allowing anyone to assemble and disassemble hydrofoil components easily. The system eliminates the need for users to carry or learn to use specialty screwdrivers.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12319389B2Hydrofoil

Publication Date: 2025.06.03 PACIFIC TRADEWINDS LLC

AI summary

The disclosure includes systems, assemblies, sub-assemblies and methods for securely attaching components of a hydrofoil for use in water sports. The hydrofoil may include a mast assembly and one or more wings. At least some components of the hydrofoil may be assembled using toolless connections. The toolless connections may prevent relative axial and/or radial movement between components of the hydrofoil.