Double-Chamber Inflatable Kayak for Puncture-Tolerant Buoyancy

Solution Overview

Problem

Inflatable kayaks on the market suffer from low safety and performance due to single-layer PVC materials that cannot withstand high pressure and are prone to puncture, leading to water leakage and sinking when encountering hard objects.

Innovation Solution

A double-chambers inflatable kayak design with an upper and lower chamber connected by a connecting portion, featuring a cavity and sealed by multiple sealing strips, and equipped with independent air valves for each chamber to ensure stability and safety.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If single-layer PVC material is used for inflatable kayak chambers, then the kayak is lightweight and easy to manufacture, but the material cannot withstand high pressure and is prone to puncture when encountering hard objects

Engineering Contradiction:

Improvepressure resistance and puncture resistanceVSAvoidchamber structure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The kayak is divided into multiple independent chambers (first chamber, second chamber, third chamber, fourth chamber) instead of using a single chamber structure. This segmentation allows the kayak to maintain buoyancy even if one chamber is punctured, while each chamber can be optimized for specific pressure requirements. The connecting portions join these chambers to form the complete kayak structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs multi-layer composite material construction for the chambers, combining different material layers to achieve both high pressure resistance and puncture resistance. The composite structure includes multiple layers with different properties that work together to enhance overall strength while maintaining flexibility and light weight.

Inventive Principle:

Principle #40Composite materials

2Reliability

If single-layer PVC material is used, then manufacturing is simple, but the kayak lacks safety factor when chambers are easily penetrated by hard or sharp objects

Engineering Contradiction:

Improvesafety factor against puncture and leakageVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The kayak is divided into multiple independent chambers (first chamber, second chamber, third chamber, fourth chamber) instead of using a single chamber structure. This segmentation allows the kayak to maintain buoyancy even if one chamber is punctured, while each chamber can be optimized for specific pressure requirements. The connecting portions join these chambers to form the complete kayak structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs multi-layer composite material construction for the chambers, combining different material layers to achieve both high pressure resistance and puncture resistance. The composite structure includes multiple layers with different properties that work together to enhance overall strength while maintaining flexibility and light weight.

Inventive Principle:

Principle #40Composite materials

3Stress or pressure

If maximum pressure (18 psi) is inflated in single-layer PVC kayaks, then the kayak appears solid and strong, but the material cannot sustain the pressure and chambers are easily penetrated

Engineering Contradiction:

Improveinternal pressure capacityVSAvoidmaterial strength under pressure

Core Design Contradiction:

Stress or pressureVSStrength

Solution Approach 1:

The kayak is divided into multiple independent chambers (first chamber, second chamber, third chamber, fourth chamber) instead of using a single chamber structure. This segmentation allows the kayak to maintain buoyancy even if one chamber is punctured, while each chamber can be optimized for specific pressure requirements. The connecting portions join these chambers to form the complete kayak structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs multi-layer composite material construction for the chambers, combining different material layers to achieve both high pressure resistance and puncture resistance. The composite structure includes multiple layers with different properties that work together to enhance overall strength while maintaining flexibility and light weight.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20250360992A1Double-chamber inflatable kayak

Publication Date: 2025.11.27 ADVANCED ELEMENTS

AI summary

A double-chambers inflatable kayak, including an upper chamber and a lower chamber which are fixedly connected to each other by a connecting portion and between which a cavity is formed, wherein the upper chamber includes a cockpit hole and a first air valve provided on the surface, the cockpit hole being in communication with the cavity, and the first air valve being used to inflate and deflate the upper chamber, and wherein the lower chamber includes a second air valve which is used to inflate and deflate the lower chamber.