Penile Implant Rear Tip Extender With Radially Balanced Locking Teeth

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Solution Overview

Problem

Existing penile prostheses face challenges in achieving precise and secure attachment of rear tip extenders due to misalignment and uneven engagement forces, leading to potential detachment during surgical procedures.

Innovation Solution

The rear tip extender is designed with multiple engagement teeth that engage at equal longitudinal distances around the proximal base of the prosthesis, balancing radial forces for improved alignment and retention, featuring a snap ring and annular lock ring for secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If a rear tip extender is attached to the penile implant, then the implant length is increased to improve fit, but misalignment and uneven engagement forces occur leading to potential detachment

Engineering Contradiction:

Improveimplant lengthVSAvoidattachment security

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The engagement interface is segmented into multiple teeth distributed around the circumference of the rear tip extender. These teeth engage with corresponding features on the implant to distribute attachment forces across multiple discrete contact points, preventing misalignment and detachment while allowing length adjustment.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The teeth are positioned at specific longitudinal distances from the distal end of the rear tip extender, creating localized engagement zones. This ensures that engagement forces are applied at optimized locations to balance radial forces and maintain alignment between the extender and implant.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If the rear tip extender is made detachable for surgical adjustment, then ease of operation is improved, but retention resistance during explantation is reduced

Engineering Contradiction:

Improvesurgical adjustabilityVSAvoidretention resistance

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The attachment system is designed to be dynamically adjustable during surgery through controlled detachment and reattachment of the rear tip extender. The teeth provide sufficient retention strength when engaged while allowing deliberate disengagement when needed, enabling surgical adjustment without compromising security during normal function.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250228671A1Penile implant rear tip extender with locking teeth configured to radially balance engagement forces between the rear tip extender and the penile implant

Publication Date: 2025.07.17 COLOPLAST AS

AI summary

A rear tip extender attachable to a penile implant a first tooth with a first tooth bite edge offset radially inward from a cavity sidewall and a second tooth with a second tooth bite edge offset radially inward from the cavity sidewall. A leading end of the first tooth bite edge and a leading end of the second tooth bite edge are each an equal distance away from a distal end of the rear tip extender.