Offset Reamer Driver Sealed Housing Design

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Solution Overview

Problem

Existing reamer drivers fail to provide a sealed environment that prevents debris and abrasion of soft tissues during use, due to incomplete sealing of components and potential for bone chips and debris to jam the mechanism.

Innovation Solution

A reamer driver with four main components: a housing assembly, a transmission drive train with double universal joints, a motor shaft coupling, and a handle assembly, where the transmission drive chain is enclosed and maintained by bearings, and a locking mechanism that allows for quick connection of acetabular reamers without exposing spaces for debris, with a handle assembly that decouples axial forces from the transmission drive train.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional reamer driver with multiple components is used, then the device can perform basic functions, but debris can penetrate into the inner workings and soft tissues can be abraded

Engineering Contradiction:

Improveprevention of debris penetrationVSAvoiddebris penetration and soft tissue abrasion

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a sealed housing assembly that completely encloses the transmission drive train, creating a protective barrier that prevents debris from penetrating into the inner workings while also preventing soft tissue abrasion during surgical procedures

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The reamer driver is divided into four distinct components (housing assembly, transmission drive train, motor shaft coupling, and handle assembly) that can be easily assembled and disassembled, with the housing assembly providing the sealed environment needed to prevent debris contamination

Inventive Principle:

Principle #1Segmentation

2Reliability

If components are sealed to prevent debris, then debris penetration is prevented, but component replacement becomes difficult

Engineering Contradiction:

Improvesealed environmentVSAvoidcomponent replacement

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The device is segmented into four main components that can be easily separated and reassembled, allowing the transmission drive train to be removed for cleaning or replacement while maintaining the sealed environment when assembled

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The housing assembly is designed to be dynamically configurable - sealed when assembled to prevent debris, but easily disassembled to allow access to the transmission drive train for maintenance or replacement of worn components

Inventive Principle:

Principle #15Dynamics

3Device complexity

If a single universal joint is used, then the structure is simple, but it cannot transmit rotational movement at large angles

Engineering Contradiction:

Improvejoint structureVSAvoidrotational movement transmission angle

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent combines multiple universal joints into the transmission drive train, where each joint works together to transmit rotational movement through offset axes, enabling the system to accommodate large angle variations (greater than 40 degrees) while maintaining a relatively simple overall structure

Inventive Principle:

Principle #5Merging (Combining)

4Ease of operation

If the locking mechanism exposes spaces during connection, then quick connection is achieved, but debris can enter and jam the mechanism

Engineering Contradiction:

Improvequick connectionVSAvoiddebris-free mechanism

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The locking mechanism is completely enclosed within the sealed housing assembly, creating a protective barrier that prevents debris from entering the mechanism during the quick connection process, while still allowing for easy operation of the locking and unlocking functions

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS10856888B2Offset reamer driver

Publication Date: 2020.12.08 INCIPIO DEVICES

AI summary

A system, method and/or reamer driver device provides a fully closed tube which prevents the invasion of debris and minimizes abrasion of soft tissue during use. The reamer device includes a minimum number of component assemblies, so as to permit easy replacement and minimize wear.