Rigid Telescopic Cooling Conduit for Marine Drive Trim

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Solution Overview

Problem

Flexible conduits used in marine drives for cooling systems are prone to damage from repetitive movement and abrasion against the transom bracket and vessel structure, affecting durability and aesthetics.

Innovation Solution

A rigid, telescopically extendable and retractable cooling water conduit system that adjusts length with the marine drive's trim position, featuring swivel joints and a drain mechanism to facilitate automatic drainage during trimming.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If flexible conduits are used for cooling water intake and drain, then the conduit can accommodate movement and trimming of the marine drive, but the conduit is prone to damage from repetitive movement and abrasion

Engineering Contradiction:
Improveconduit flexibilityVSAvoidconduit durability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent employs a telescopic rigid conduit system that dynamically adjusts its length through telescopic sections with sealing members. This allows the conduit to accommodate the vertical movement and trimming of the marine drive while maintaining rigidity to prevent damage from abrasion and repetitive stress. The telescopic mechanism enables the conduit to extend and retract as needed without compromising structural integrity.

Inventive Principle:
Principle #15Dynamics

2Reliability

If a rigid conduit is used for cooling water intake and drain, then the conduit durability is improved, but the conduit cannot accommodate movement and trimming of the marine drive

Engineering Contradiction:
Improveconduit durabilityVSAvoidconduit adjustability
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The rigid conduit is segmented into multiple sections including fixed portions and telescopic portions. The telescopic sections contain sealing members that allow relative movement between segments while maintaining water-tight connections. This segmentation enables the conduit to accommodate marine drive trimming and movement while preserving the durability benefits of rigid construction throughout the system.

Inventive Principle:
Principle #1Segmentation

3Device complexity

If the conduit length is fixed, then the conduit structure is simple, but the conduit cannot adapt to different trim positions of the marine drive

Engineering Contradiction:
Improveconduit structureVSAvoidconduit adaptability
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The telescopic conduit sections utilize a nested doll principle where one conduit section is inserted within another. The telescopic sections include inner and outer tubes with sealing members that allow one section to slide within another, enabling length adjustment to accommodate different trim positions. This nesting approach provides adaptability while maintaining a relatively compact and integrated structure.

Inventive Principle:
Principle #7Nested doll (Nesting)

4Ease of operation

If manual drainage is required for cooling water, then the drainage control is precise, but the operation requires manual intervention and time

Engineering Contradiction:
Improvedrainage controlVSAvoiddrainage time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The conduit system incorporates automatic drainage functionality where the telescopic mechanism and gravity work together to enable self-draining. When the marine drive is trimmed to certain positions, the conduit configuration naturally allows cooling water to drain automatically without requiring manual intervention. This self-service drainage approach eliminates time loss while maintaining adequate control over the drainage process.

Inventive Principle:
Principle #25Self-service

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 solution provides a durable and adjustable cooling water conduit system that maintains conduit integrity and convenience by preventing damage from movement, while allowing for efficient cooling and easy water drainage without manual intervention.

Implementation Method 1

a rigid cooling water conduit extending from the drive assembly to the transom bracket assembly, the rigid cooling water conduit being configured to convey the cooling water from the drive assembly for cooling at least one component of the marine drive. In non-limiting examples, the rigid cooling water conduit is lengthened upon trimming of the drive assembly up relative to the transom bracket assembly and the rigid cooling water conduit is shortened upon trimming of the drive assembly down relative to the transom bracket assembly.

Methodology Applied
Scientific EffectTelescopic mechanism:

Implementation Method 2

a cooling water pump configured to pump cooling water from the body of the water for cooling at least one component of the marine drive

Methodology Applied
Scientific EffectPumping: Pump

Implementation Method 3

the rigid cooling water conduit being configured to convey the cooling water from the drive assembly for cooling at least one component of the marine drive

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 4

for cooling at least one component of the marine drive

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS12145710B1Marine drives having rigid cooling water intake and drain mechanism
Publication Date: 2024.11.19 BRUNSWICK CORP
  • US12145710B1 patent drawing
  • US12145710B1 patent drawing
  • US12145710B1 patent drawing

AI summary

A marine drive is configured for propelling a marine vessel in a body of water. The marine drive has a transom bracket assembly configured to mount the marine drive to the marine vessel, a drive assembly coupled to the transom bracket assembly and configured to generate a thrust force in the body of water, the drive assembly being trimmable up and down relative to the transom bracket assembly, a cooling water pump configured to pump cooling water from the body of the water for cooling at least one component of the marine drive, and a rigid cooling water conduit extending from the drive assembly to the transom bracket assembly, the rigid cooling water conduit being configured to convey the cooling water from the drive assembly to the cooling water pump.